/*
 * PORTFOLIO MAIN STYLE SHEET
 * Developer: Ayush Mane (Full Stack Developer & AI/ML Specialist)
 * Design: Premium, Glassmorphism, Dark/Light Mode, Custom Animations
 */

/* ==========================================
   1. DESIGN TOKENS & COLOR PALETTES
   ========================================== */
:root {
    /* Fonts */
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    /* Layout */
    --nav-height: 80px;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    --border-radius-round: 50%;
    
    /* Transitions */
    --trans-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --trans-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --trans-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Shadows */
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* Glow Animations colors */
    --glow-violet: rgba(99, 102, 241, 0.15);
    --glow-cyan: rgba(6, 182, 212, 0.15);
}

/* Dark Theme Variables (Default) */
[data-theme="dark"] {
    --bg-primary: #030014;
    --bg-secondary: #0a0720;
    --bg-tertiary: rgba(255, 255, 255, 0.02);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent: #6366f1; /* Indigo */
    --accent-secondary: #a855f7; /* Purple */
    --accent-cyan: #06b6d4; /* Cyan */
    --accent-glow: rgba(99, 102, 241, 0.5);
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.16);
    
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-blur: blur(12px);
    
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.35);
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #06b6d4 100%);
    --gradient-card: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
    
    --scrollbar-thumb: rgba(99, 102, 241, 0.4);
    --scrollbar-track: #030014;
}

/* Light Theme Variables */
[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: rgba(0, 0, 0, 0.02);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --accent: #4f46e5;
    --accent-secondary: #8b5cf6;
    --accent-cyan: #0ea5e9;
    --accent-glow: rgba(79, 70, 229, 0.3);
    
    --border-color: rgba(15, 23, 42, 0.08);
    --border-hover: rgba(15, 23, 42, 0.16);
    
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-blur: blur(16px);
    
    --card-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.06);
    --gradient-primary: linear-gradient(135deg, #4f46e5 0%, #8b5cf6 50%, #0ea5e9 100%);
    --gradient-card: linear-gradient(135deg, rgba(15, 23, 42, 0.02) 0%, rgba(15, 23, 42, 0.00) 100%);
    
    --scrollbar-thumb: rgba(79, 70, 229, 0.4);
    --scrollbar-track: #f8fafc;
}

/* ==========================================
   2. GENERAL RESET & BASE STYLES
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 16px;
    font-family: var(--font-sans);
    scroll-behavior: smooth;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
}

body {
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    transition: background-color var(--trans-normal), color var(--trans-normal);
}

img, svg {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--trans-fast);
}

ul {
    list-style: none;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}
::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: var(--border-radius-sm);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* ==========================================
   3. UTILITY CLASSES & GLASSMORPHISM
   ========================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
    border-radius: var(--border-radius-md);
    transition: border-color var(--trans-normal), box-shadow var(--trans-normal), transform var(--trans-normal);
}

.glass-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-glow {
    filter: drop-shadow(0 0 12px var(--accent-glow));
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    border: none;
    transition: transform var(--trans-fast), box-shadow var(--trans-fast), background-color var(--trans-fast), color var(--trans-fast);
    font-family: var(--font-sans);
}

.btn-primary {
    background: var(--gradient-primary);
    color: #ffffff;
    box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--border-color);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header .subtitle {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent);
    display: block;
    margin-bottom: 8px;
}

.section-header .section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

.header-line {
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 12px auto 0;
    border-radius: var(--border-radius-sm);
}

/* Blinking dot */
.indicator-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #10b981;
    display: inline-block;
}

.blinking {
    animation: blink 1.5s infinite;
}

/* ==========================================
   4. LOADING SCREEN
   ========================================== */
.loader-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #030014;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader-content {
    text-align: center;
    width: 280px;
}

.loader-logo {
    font-size: 2.2rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4px;
}

.logo-bracket {
    color: #6366f1;
}

.logo-text {
    background: linear-gradient(135deg, #ffffff, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 1px;
}

[data-theme="light"] .logo-link .logo-text {
    background: linear-gradient(135deg, var(--text-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.loader-progress-bar {
    width: 100%;
    height: 3px;
    background-color: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.loader-progress {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #6366f1, #06b6d4);
    transition: width 0.1s linear;
}

.loader-percentage {
    font-size: 0.9rem;
    color: #9ca3af;
    font-weight: 500;
}

/* ==========================================
   5. SCROLL PROGRESS & TIMERS
   ========================================== */
.scroll-progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    z-index: 2000;
    background-color: transparent;
}

.scroll-progress-bar {
    height: 100%;
    width: 0%;
    background: var(--gradient-primary);
}

/* ==========================================
   6. CUSTOM CURSOR
   ========================================== */
.custom-cursor {
    width: 32px;
    height: 32px;
    border: 2px solid var(--accent);
    border-radius: 50%;
    position: fixed;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 10000;
    transition: width 0.2s ease, height 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
    opacity: 0;
}

.custom-cursor-dot {
    width: 6px;
    height: 6px;
    background-color: var(--accent-cyan);
    border-radius: 50%;
    position: fixed;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 10001;
    opacity: 0;
}

/* Cursor effects on active links */
.custom-cursor.hovered {
    width: 48px;
    height: 48px;
    background-color: rgba(99, 102, 241, 0.1);
    border-color: var(--accent-cyan);
}

.custom-cursor-dot.hovered {
    background-color: var(--accent);
}

/* Particle Canvas Background */
.particle-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    pointer-events: none;
}

/* ==========================================
   7. HEADER & NAVIGATION
   ========================================== */
.navbar-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    background: rgba(3, 0, 20, 0.3); /* initial overlay fallback */
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    transition: background var(--trans-normal), border-color var(--trans-normal);
}

[data-theme="light"] .navbar-header {
    background: var(--glass-bg);
}

.navbar-header.sticky {
    background: var(--glass-bg);
}

.nav-container {
    height: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-link {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--trans-normal);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.nav-cta {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

.nav-cta::after {
    display: none;
}

/* Nav Right elements */
.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.clock-display {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    background-color: var(--bg-tertiary);
    padding: 6px 12px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    font-family: monospace;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.15rem;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--border-radius-sm);
    transition: color var(--trans-fast), background-color var(--trans-fast);
}

.theme-toggle:hover {
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
}

[data-theme="dark"] .sun-icon {
    display: none;
}

[data-theme="light"] .moon-icon {
    display: none;
}

.burger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1100;
}

.burger-bar {
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--trans-normal), opacity var(--trans-normal);
}

/* ==========================================
   8. HERO SECTION
   ========================================== */
.hero-section {
    min-height: 100vh;
    padding-top: calc(var(--nav-height) + 40px);
    padding-bottom: 60px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: center;
}

/* Floating tech items */
.floating-tech-container {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: -1;
}

.tech-float-icon {
    position: absolute;
    font-size: 2rem;
    opacity: 0.12;
    animation: float 6s ease-in-out infinite;
}

[data-theme="light"] .tech-float-icon {
    opacity: 0.25;
}

.icon-java { top: 15%; left: 10%; color: #f89820; animation-delay: 0s; }
.icon-python { top: 25%; right: 15%; color: #306998; animation-delay: 1.5s; }
.icon-js { bottom: 30%; left: 8%; color: #f7df1e; animation-delay: 3s; }
.icon-db { bottom: 20%; right: 25%; color: #00758f; animation-delay: 4.5s; }
.icon-git { top: 50%; right: 48%; color: #f05032; animation-delay: 2s; }

.hero-left {
    position: relative;
    z-index: 2;
}

.hero-subtitle {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--accent-cyan);
    letter-spacing: 1px;
    background-color: rgba(6, 182, 212, 0.1);
    padding: 6px 14px;
    border-radius: var(--border-radius-lg);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 12px;
}

.hero-roles {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
    max-width: 620px;
}

/* Hero CTAs */
.hero-ctas {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

/* Social icons */
.hero-socials {
    display: flex;
    gap: 16px;
}

.hero-socials a {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    transition: transform var(--trans-fast), color var(--trans-fast), border-color var(--trans-fast);
}

.hero-socials a:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-3px);
}

/* Focus area panel */
.focus-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 40px;
    max-width: 650px;
}

.focus-card {
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 16px 8px;
    text-align: center;
    transition: transform var(--trans-fast), border-color var(--trans-fast), box-shadow var(--trans-fast);
}

.focus-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
    box-shadow: var(--shadow-sm);
}

.focus-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.focus-label {
    font-size: 0.8rem;
    color: var(--text-primary);
    font-weight: 700;
    margin-top: 4px;
}

/* Profile Visual */
.hero-right {
    display: flex;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.profile-glow-circle {
    position: absolute;
    width: 320px;
    height: 320px;
    background: var(--gradient-primary);
    filter: blur(80px);
    opacity: 0.25;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: -1;
    pointer-events: none;
}

.profile-card {
    position: relative;
    padding: 24px;
    border-radius: var(--border-radius-lg);
    width: 340px;
}

.profile-img-container {
    width: 100%;
    aspect-ratio: 1/1;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-svg-fallback {
    width: 80%;
    height: 80%;
}

.profile-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #10b981;
}

/* ==========================================
   9. ABOUT ME & WHY HIRE ME
   ========================================== */
.about-section {
    padding: 100px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 50px;
    margin-bottom: 80px;
}

.about-grid-left h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.about-p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1rem;
}

.quick-specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 32px 0;
}

.spec-item {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.spec-item i {
    color: var(--accent);
    font-size: 1.1rem;
}

.about-ctas {
    display: flex;
    gap: 16px;
}

/* Timeline Layout */
.about-timeline-right h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.timeline {
    position: relative;
    border-left: 2px solid var(--border-color);
    padding-left: 24px;
    margin-left: 12px;
}

.timeline-item {
    position: relative;
    margin-bottom: 32px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -33px;
    top: 6px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: var(--bg-primary);
    border: 3px solid var(--accent);
}

.timeline-date {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent-cyan);
    margin-bottom: 6px;
    text-transform: uppercase;
}

.timeline-card {
    padding: 20px;
    border-radius: var(--border-radius-md);
}

.timeline-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.company-tag {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 12px;
}

.timeline-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Why Hire Me subsection */
.why-hire-me-container {
    margin-top: 80px;
}

.subsection-title {
    font-size: 2rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 40px;
}

.why-hire-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.why-card {
    padding: 24px;
    text-align: center;
    border-radius: var(--border-radius-md);
}

.why-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent);
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.why-card h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.why-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ==========================================
   10. EDUCATION
   ========================================== */
.education-section {
    padding: 100px 0;
}

.edu-layout {
    display: flex;
    justify-content: center;
}

.edu-card {
    padding: 40px;
    border-radius: var(--border-radius-lg);
    max-width: 800px;
    width: 100%;
}

.edu-badge {
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--accent);
    font-weight: 700;
    font-size: 0.8rem;
    padding: 6px 16px;
    border-radius: var(--border-radius-lg);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
}

.edu-meta h3 {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.edu-meta h4 {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 12px;
}

.edu-location, .edu-duration {
    font-size: 0.9rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 8px;
}

.edu-details {
    margin-top: 24px;
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
}

.edu-details h5 {
    font-size: 1rem;
    font-weight: 700;
    margin: 20px 0 12px;
}

.edu-subjects {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.subject-tag {
    font-size: 0.8rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: var(--border-radius-sm);
}

/* ==========================================
   11. TECHNICAL SKILLS
   ========================================== */
.skills-section {
    padding: 100px 0;
}

.skills-wrapper {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.skills-category-card.glass-card {
    padding: 32px;
    border-radius: var(--border-radius-md);
    position: relative;
    overflow: hidden;
    transition: border-color 0.4s ease, box-shadow 0.4s ease, transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.skills-category-card.glass-card:hover {
    transform: translateY(-8px);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: 0 12px 40px rgba(99, 102, 241, 0.15), 0 0 0 1px rgba(99, 102, 241, 0.2);
}

.skills-category-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

.skills-category-card h3 i {
    color: var(--accent-cyan);
}

.skills-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.skill-item {
    width: 100%;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.skill-name-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
}

.skill-icon {
    font-size: 1.15rem;
    transition: transform var(--trans-normal) ease;
}

.git-github-icon {
    color: #ffffff;
}

[data-theme="light"] .git-github-icon {
    color: #0f172a;
}

.skill-item:hover .skill-icon {
    transform: scale(1.25) rotate(10deg);
}

.skill-bar-bg {
    width: 100%;
    height: 6px;
    background-color: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
}

.skill-bar {
    height: 100%;
    width: 0%; /* Animated via JS */
    background: var(--gradient-primary);
    border-radius: 3px;
    box-shadow: 0 0 8px var(--accent-glow);
    transition: width 1.5s cubic-bezier(0.1, 0.8, 0.3, 1);
}


/* ==========================================
   12. SERVICES
   ========================================== */
.services-section {
    padding: 100px 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    padding: 40px;
    border-radius: var(--border-radius-lg);
    cursor: default;
}

.service-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius-md);
    background: var(--gradient-primary);
    color: #ffffff;
    font-size: 1.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    box-shadow: 0 4px 10px var(--accent-glow);
}

.service-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.service-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==========================================
   13. PROJECTS
   ========================================== */
.projects-section {
    padding: 100px 0;
}

.projects-filter-bar {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
}

.filter-btn {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 20px;
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background-color var(--trans-fast), color var(--trans-fast), border-color var(--trans-fast);
}

.filter-btn:hover, .filter-btn.active {
    color: var(--text-primary);
    background-color: var(--border-color);
    border-color: var(--accent);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.project-card {
    border-radius: var(--border-radius-md);
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.project-img-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 1.6/1;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.2);
}

.project-accent-grad {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.4), rgba(6, 182, 212, 0.4));
    z-index: 1;
}

.project-accent-grad.blue-grad {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.4), rgba(99, 102, 241, 0.4));
}
.project-accent-grad.orange-grad {
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.4), rgba(236, 72, 153, 0.4));
}
.project-accent-grad.green-grad {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.4), rgba(99, 102, 241, 0.4));
}
.project-accent-grad.purple-grad {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.4), rgba(236, 72, 153, 0.4));
}
.project-accent-grad.pink-grad {
    background: linear-gradient(135deg, rgba(236, 72, 153, 0.4), rgba(6, 182, 212, 0.4));
}

.project-icon-placeholder {
    font-size: 3rem;
    color: #ffffff;
    opacity: 0.85;
    z-index: 2;
    filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.3));
    transition: transform var(--trans-normal);
}

.project-card:hover .project-icon-placeholder {
    transform: scale(1.1) rotate(5deg);
}

.project-category-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background-color: rgba(3, 0, 20, 0.7);
    backdrop-filter: var(--glass-blur);
    color: #ffffff;
    padding: 4px 12px;
    border-radius: var(--border-radius-lg);
    font-size: 0.75rem;
    font-weight: 700;
    z-index: 2;
}

.project-info {
    padding: 24px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-info h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.project-short-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    flex-grow: 1;
}

.project-tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.tech-tag {
    font-size: 0.75rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 4px 10px;
    border-radius: var(--border-radius-sm);
    font-weight: 500;
}

.project-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.project-icon-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: transform var(--trans-fast), color var(--trans-fast), border-color var(--trans-fast);
}

.project-icon-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: scale(1.05);
}

/* ==========================================
   14. VIDEOS SHOWCASE
   ========================================== */
.videos-section {
    padding: 100px 0;
}

.videos-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.video-item {
    padding: 24px;
    border-radius: var(--border-radius-lg);
}

.video-item h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.video-container {
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    background-color: #000000;
    border: 1px solid var(--border-color);
    margin-bottom: 16px;
}

.video-container iframe,
.video-container video {
    width: 100%;
    height: 100%;
    border: none;
    object-fit: contain;
    background-color: #000000;
}

.video-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ==========================================
   15. CERTIFICATIONS & CAROUSEL
   ========================================== */
.certifications-section {
    padding: 100px 0;
    overflow-x: hidden;
}

.certifications-carousel-wrapper {
    position: relative;
    width: 100%;
    overflow: hidden;
    padding: 40px 0;
    cursor: grab;
}

.certifications-carousel-wrapper:active {
    cursor: grabbing;
}

.certs-track {
    display: flex;
    gap: 24px;
    width: max-content;
    will-change: transform;
}

/* Base card styling inside track */
.certs-track .cert-card {
    width: 320px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: border-color var(--trans-normal), box-shadow var(--trans-normal), transform var(--trans-normal);
    user-select: none;
    flex-shrink: 0;
    position: relative;
    /* staggered floating wave effect */
    animation: floatCard 4s ease-in-out infinite alternate;
}

.certs-track .cert-card:nth-child(2n) {
    animation-delay: -1s;
    animation-duration: 4.5s;
}

.certs-track .cert-card:nth-child(3n) {
    animation-delay: -2s;
    animation-duration: 5s;
}

@keyframes floatCard {
    0% { transform: translateY(0); }
    100% { transform: translateY(-6px); }
}

/* Card hover animation overrides floating */
.certs-track .cert-card:hover {
    animation-play-state: paused;
    transform: translateY(-10px) scale(1.03);
    border-color: var(--accent-cyan);
    box-shadow: 0 15px 30px rgba(6, 182, 212, 0.15), 0 0 15px var(--accent-glow);
    z-index: 10;
}

/* Card Thumbnail */
.cert-thumbnail {
    width: 100%;
    aspect-ratio: 16/10;
    overflow: hidden;
    position: relative;
    border-bottom: 1px solid var(--border-color);
    background-color: #030014;
}

.cert-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.cert-card:hover .cert-thumbnail img {
    transform: scale(1.08);
}

.cert-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(3, 0, 20, 0.5);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--trans-normal);
}

.cert-card:hover .cert-overlay {
    opacity: 1;
}

.view-btn-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--accent);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: 0 4px 10px var(--accent-glow);
    transform: scale(0.8);
    transition: transform var(--trans-normal) cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.cert-card:hover .view-btn-icon {
    transform: scale(1);
}

/* Card Info */
.cert-info-content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-grow: 1;
}

.cert-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-cyan);
    background-color: rgba(6, 182, 212, 0.1);
    padding: 4px 12px;
    border-radius: var(--border-radius-lg);
    width: fit-content;
}

.cert-info-content h3 {
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-primary);
    margin: 4px 0;
}

.cert-issuer {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.cert-date {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: auto;
}

/* Lightbox Modal & Zoom styling */
.modal.cert-modal-active .modal-content {
    max-width: 800px;
    padding: 24px;
}

.modal-cert-lightbox {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.lightbox-header {
    text-align: center;
    width: 100%;
}

.lightbox-header h3 {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.lightbox-issuer {
    font-size: 0.9rem;
    color: var(--accent-cyan);
    font-weight: 600;
}

.lightbox-viewer-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    position: relative;
    gap: 16px;
}

.lightbox-img-wrapper {
    flex-grow: 1;
    max-height: 55vh;
    aspect-ratio: 1.4/1;
    overflow: hidden;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    cursor: grab;
}

.lightbox-img-wrapper:active {
    cursor: grabbing;
}

.lightbox-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    user-select: none;
    pointer-events: auto;
    transition: transform 0.15s ease-out;
}

.lightbox-nav-btn {
    background: rgba(3, 0, 20, 0.6);
    border: 1px solid var(--border-color);
    width: 46px;
    height: 46px;
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: background var(--trans-fast), transform var(--trans-fast), border-color var(--trans-fast);
    backdrop-filter: var(--glass-blur);
    z-index: 10;
    flex-shrink: 0;
}

.lightbox-nav-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: #ffffff;
    transform: scale(1.1);
}

.lightbox-controls {
    display: flex;
    gap: 12px;
    margin-top: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.control-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: background var(--trans-fast), color var(--trans-fast), border-color var(--trans-fast);
}

.control-btn:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--text-primary);
    border-color: var(--accent);
}


/* ==========================================
   16. GITHUB INTEGRATION
   ========================================== */
.github-section {
    padding: 100px 0;
}

.github-dashboard {
    padding: 32px;
    border-radius: var(--border-radius-lg);
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 40px;
    align-items: center;
}

.github-profile-summary {
    display: flex;
    gap: 24px;
    align-items: center;
}

.github-avatar-box {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--accent);
}

.github-avatar-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.github-details h3 {
    font-size: 1.25rem;
    font-weight: 700;
}

.github-username {
    font-size: 0.85rem;
    color: var(--accent-cyan);
    font-weight: 600;
    margin-bottom: 8px;
}

.github-bio {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.github-stats {
    display: flex;
    gap: 20px;
    margin-bottom: 16px;
}

.github-stat {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.github-stat span {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Simulated activity grid */
.github-activity-grid-container h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.github-grid {
    display: grid;
    grid-template-columns: repeat(24, 1fr);
    gap: 4px;
    margin-bottom: 8px;
}

.github-cell {
    aspect-ratio: 1/1;
    border-radius: 2px;
    background-color: var(--bg-tertiary);
}

/* Green box colors */
.github-cell.level-0 { background-color: var(--bg-tertiary); }
.github-cell.level-1 { background-color: #0e4429; }
.github-cell.level-2 { background-color: #006d32; }
.github-cell.level-3 { background-color: #26a641; }
.github-cell.level-4 { background-color: #39d353; }

[data-theme="light"] .github-cell.level-1 { background-color: #9be9a8; }
[data-theme="light"] .github-cell.level-2 { background-color: #40c463; }
[data-theme="light"] .github-cell.level-3 { background-color: #30a14e; }
[data-theme="light"] .github-cell.level-4 { background-color: #216e39; }

.github-grid-legend {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 10px;
    height: 10px;
    border-radius: 2px;
}

/* ==========================================
   17. TESTIMONIALS
   ========================================== */
.testimonials-section {
    padding: 100px 0;
}

.slider-wrapper {
    max-width: 750px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.testimonial-slider {
    display: flex;
    transition: transform var(--trans-slow) cubic-bezier(0.4, 0, 0.2, 1);
}

.testimonial-slide {
    min-width: 100%;
    opacity: 0;
    transition: opacity var(--trans-slow) ease;
}

.testimonial-slide.active {
    opacity: 1;
}

.testimonial-content {
    padding: 40px;
    border-radius: var(--border-radius-lg);
    text-align: center;
}

.quote-icon {
    font-size: 2.2rem;
    color: var(--accent);
    opacity: 0.3;
    margin-bottom: 20px;
}

.testimonial-content p {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.client-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.client-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--bg-tertiary);
    color: var(--accent);
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
}

.client-meta h4 {
    font-size: 0.95rem;
    font-weight: 700;
}

.client-meta p {
    font-size: 0.8rem !important;
    font-style: normal !important;
    color: var(--text-muted) !important;
    margin-bottom: 0 !important;
}

/* Controls */
.slider-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-top: 32px;
}

.slider-arrow {
    background: none;
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--trans-fast), color var(--trans-fast);
}

.slider-arrow:hover {
    color: var(--text-primary);
    background-color: var(--border-color);
}

.slider-dots {
    display: flex;
    gap: 8px;
}

.slider-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--border-color);
    cursor: pointer;
    transition: width var(--trans-fast), background-color var(--trans-fast);
}

.slider-dot.active {
    width: 24px;
    border-radius: 4px;
    background-color: var(--accent);
}

/* ==========================================
   18. FREELANCE AVAILABILITY BANNER
   ========================================== */
.freelance-availability {
    padding: 60px 0;
}

.availability-banner {
    padding: 60px 40px;
    text-align: center;
    border-radius: var(--border-radius-lg);
    position: relative;
    overflow: hidden;
}

.banner-glow-effect {
    position: absolute;
    width: 400px;
    height: 100px;
    background: var(--gradient-primary);
    filter: blur(80px);
    opacity: 0.15;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: -1;
}

.availability-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 700;
    color: #10b981;
    background-color: rgba(16, 185, 129, 0.1);
    padding: 6px 16px;
    border-radius: var(--border-radius-lg);
    margin-bottom: 20px;
}

.availability-banner h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.availability-banner p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 28px;
    max-width: 550px;
    margin-left: auto;
    margin-right: auto;
}

/* ==========================================
   19. CONTACT ME
   ========================================== */
.contact-section {
    padding: 100px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 40px;
}

.contact-info-panel {
    padding: 40px;
    border-radius: var(--border-radius-lg);
}

.contact-info-panel h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.contact-info-panel p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.contact-details-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 40px;
}

.contact-detail-card {
    display: flex;
    align-items: center;
    gap: 16px;
}

.detail-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-sm);
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.detail-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
}

.detail-link {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.panel-social-links {
    display: flex;
    gap: 12px;
}

.panel-social-links a {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-sm);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.panel-social-links a:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-2px);
}

/* Contact Form */
.contact-form-panel {
    padding: 40px;
    border-radius: var(--border-radius-lg);
}

.contact-form-panel h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.input-group {
    display: flex;
    flex-direction: column;
}

.input-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.required {
    color: #ef4444;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 16px;
    color: var(--text-muted);
    font-size: 0.9rem;
    pointer-events: none;
}

.textarea-icon {
    top: 18px;
}

.input-wrapper input, .input-wrapper textarea, .input-wrapper select {
    width: 100%;
    padding: 12px 16px 12px 44px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    transition: border-color var(--trans-fast), background-color var(--trans-fast);
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
}

.input-wrapper input:focus, .input-wrapper textarea:focus, .input-wrapper select:focus {
    border-color: var(--accent);
    background-color: rgba(255, 255, 255, 0.01);
}

.input-wrapper select {
    cursor: pointer;
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a1a1aa' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
    padding-right: 40px;
}

[data-theme="light"] .input-wrapper select {
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
}

.input-wrapper select option {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Custom Select Dropdown UI */
.custom-select-container {
    position: relative;
    width: 100%;
}

.custom-select-trigger {
    width: 100%;
    padding: 12px 16px 12px 44px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    cursor: pointer;
    transition: border-color var(--trans-fast), background-color var(--trans-fast);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.custom-select-trigger::after {
    content: "";
    width: 16px;
    height: 16px;
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a1a1aa' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-size: contain;
    transition: transform var(--trans-fast);
}

[data-theme="light"] .custom-select-trigger::after {
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
}

.custom-select-container.open .custom-select-trigger {
    border-color: var(--accent);
}

.custom-select-container.open .custom-select-trigger::after {
    transform: rotate(180deg);
}

.custom-select-text.placeholder {
    color: var(--text-muted);
}

.custom-options {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    width: 100%;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--card-shadow);
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--trans-fast), visibility var(--trans-fast), transform var(--trans-fast);
    overflow: hidden;
    padding: 6px;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.custom-select-container.open .custom-options {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.custom-option {
    padding: 10px 16px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: calc(var(--border-radius-sm) - 4px);
    transition: background-color var(--trans-fast), color var(--trans-fast);
}

/* Hover and selection colors: Blue (var(--accent)) instead of default grey */
.custom-option:hover {
    background-color: var(--accent) !important;
    color: #ffffff !important;
}

.custom-option.selected {
    background-color: rgba(99, 102, 241, 0.15);
    color: var(--accent);
    font-weight: 600;
}

[data-theme="light"] .custom-option.selected {
    background-color: rgba(79, 70, 229, 0.1);
}

/* Validation styling */
.input-wrapper input.invalid,
.input-wrapper textarea.invalid,
.input-wrapper select.invalid,
.custom-select-container.invalid .custom-select-trigger {
    border-color: #ef4444 !important;
}

/* Visually hide original select but keep active */
.input-wrapper select.hidden-select {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
    visibility: hidden;
}

.input-wrapper textarea {
    resize: none;
}

.error-msg {
    font-size: 0.75rem;
    color: #ef4444;
    margin-top: 4px;
    min-height: 18px;
    display: block;
}

.full-width {
    margin-bottom: 20px;
}

/* Submit Button & Spinner */
.btn-submit {
    width: 100%;
    height: 48px;
    position: relative;
}

.btn-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #ffffff;
    animation: rotate 0.8s linear infinite;
    display: none;
}

/* ==========================================
   20. FOOTER
   ========================================== */
.footer {
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
    padding: 60px 0 20px;
}

.footer-container {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border-color);
}

.footer-brand p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 16px;
    max-width: 320px;
}

.footer-links h4, .footer-info h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.footer-links a:hover {
    color: var(--accent);
}

.visitor-counter-box {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    background-color: var(--bg-tertiary);
    padding: 6px 14px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 12px;
}

.current-timezone {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-bottom {
    padding-top: 20px;
}

.footer-bottom-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.copyright {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-bottom-socials {
    display: flex;
    gap: 12px;
}

.footer-bottom-socials a {
    color: var(--text-muted);
    font-size: 1rem;
}

.footer-bottom-socials a:hover {
    color: var(--accent);
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-sm);
    background-color: var(--accent);
    color: #ffffff;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 10px var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity var(--trans-normal), visibility var(--trans-normal), transform var(--trans-normal);
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--accent-secondary);
}

/* ==========================================
   21. UNIFIED POPUP MODALS SYSTEM
   ========================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--trans-normal), visibility var(--trans-normal);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(3, 0, 20, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 650px;
    max-height: 85vh;
    overflow-y: auto;
    z-index: 5100;
    padding: 32px;
    transform: scale(0.9) translateY(20px);
    transition: transform var(--trans-normal);
}

.modal.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-secondary);
    cursor: pointer;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--trans-fast), color var(--trans-fast);
}

.modal-close:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Modal Injected Layouts */
.modal-project-body {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.modal-project-img {
    width: 100%;
    aspect-ratio: 1.8/1;
    border-radius: var(--border-radius-md);
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: #ffffff;
}

.modal-project-header h3 {
    font-size: 1.5rem;
    font-weight: 800;
}

.modal-project-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.modal-features-list {
    margin-left: 20px;
    margin-top: 10px;
}

.modal-features-list li {
    list-style-type: disc;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.modal-project-tech {
    margin: 10px 0;
}

.modal-project-tech h4, .modal-project-features h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.modal-project-actions {
    display: flex;
    gap: 12px;
    margin-top: 10px;
}

.modal-project-actions .btn {
    flex: 1;
}

/* Cert Image Popup inside Modal */
.modal-cert-body {
    text-align: center;
}

.modal-cert-img-box {
    width: 100%;
    aspect-ratio: 1.4/1;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    margin-bottom: 20px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.modal-cert-img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.modal-cert-fallback {
    padding: 30px;
}

.modal-cert-fallback i {
    font-size: 4rem;
    color: var(--accent);
    margin-bottom: 16px;
}

/* Toasts notifications */
.toast-container {
    position: fixed;
    bottom: 24px;
    left: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    min-width: 250px;
    padding: 16px 20px;
    border-radius: var(--border-radius-sm);
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    animation: toast-in 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28) forwards;
}

.toast.success { background-color: #10b981; }
.toast.error { background-color: #ef4444; }

/* ==========================================
   22. ANIMATION KEYFRAMES
   ========================================== */
@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@keyframes float {
    0% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-15px) rotate(5deg); }
    100% { transform: translateY(0) rotate(0deg); }
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes toast-in {
    0% { transform: translateX(-50px); opacity: 0; }
    100% { transform: translateX(0); opacity: 1; }
}

/* Scroll reveal triggers */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================
   23. TECHNICAL EXPERTISE MARQUEE
   ========================================== */
.technical-expertise-container {
    padding: 60px 0;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.expertise-title {
    font-size: 1.5rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 40px;
    color: var(--text-primary);
    position: relative;
}

.expertise-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-sm);
}

.marquee-viewport {
    width: 100%;
    overflow: hidden;
    position: relative;
    padding: 10px 0;
    mask-image: linear-gradient(to right, transparent, #000 10%, #000 90%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, #000 10%, #000 90%, transparent);
}

.marquee-track {
    display: flex;
    width: max-content;
    animation: marquee-left-to-right 28s linear infinite;
    will-change: transform;
}

.marquee-group {
    display: flex;
    align-items: center;
    gap: 40px;
    padding-right: 40px;
}

.marquee-track:hover {
    animation-play-state: paused;
}

.marquee-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 110px;
    flex-shrink: 0;
}

.marquee-item img, .marquee-item svg {
    width: 48px;
    height: 48px;
    object-fit: contain;
    transition: transform var(--trans-fast) ease;
}

.marquee-item:hover img, .marquee-item:hover svg {
    transform: scale(1.1);
}

.marquee-item span {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: color var(--trans-fast) ease;
}

.marquee-item:hover span {
    color: var(--text-primary);
}

/* GitHub logo visibility on dark theme */
[data-theme="dark"] .github-icon-svg {
    filter: invert(1) brightness(1.8);
}

@keyframes marquee-left-to-right {
    0% {
        transform: translateX(-50%);
    }
    100% {
        transform: translateX(0%);
    }
}