:root {
    --bg-paper: #f8fafc;
    --paper-card: #ffffff;
    --primary: #1e293b; /* Slate-800 for better tech feel */
    --secondary: #64748b;
    --accent: #3b82f6; /* Modern Blue for Blueprint vibe */
    --tech-green: #22c55e;
    --bg-card: var(--paper-card);
    --glass-border: rgba(30, 41, 59, 0.15);
    --glow-primary: rgba(59, 130, 246, 0.25);
    --on-primary: #ffffff;
    --bg-dark: #0f172a;
    --overlay-dark: rgba(15, 23, 42, 0.65);
    --modal-overlay: rgba(0, 0, 0, 0.88);
    --chip-bg: rgba(30, 41, 59, 0.05);
    --chip-border: rgba(30, 41, 59, 0.14);
    --paper-shadow: 8px 8px 0 rgba(30, 41, 59, 0.1);
    --paper-border: 1px solid rgba(30, 41, 59, 0.15);
    
    --font-head: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body[data-theme="dark"] {
    --bg-paper: #0b1220;
    --paper-card: #111827;
    --primary: #e2e8f0;
    --secondary: #94a3b8;
    --accent: #60a5fa;
    --tech-green: #34d399;
    --bg-card: #111827;
    --glass-border: rgba(148, 163, 184, 0.28);
    --glow-primary: rgba(96, 165, 250, 0.35);
    --on-primary: #0b1220;
    --bg-dark: #020617;
    --overlay-dark: rgba(2, 6, 23, 0.74);
    --modal-overlay: rgba(2, 6, 23, 0.92);
    --chip-bg: rgba(148, 163, 184, 0.14);
    --chip-border: rgba(148, 163, 184, 0.3);
    --paper-shadow: 8px 8px 0 rgba(2, 6, 23, 0.45);
    --paper-border: 1px solid rgba(148, 163, 184, 0.25);
}

body[data-theme="holiday"] {
    --bg-paper: #fdf7f0;
    --paper-card: #ffffff;
    --primary: #7f1d1d;
    --secondary: #4b5563;
    --accent: #16a34a;
    --tech-green: #dc2626;
    --bg-card: #fffaf5;
    --glass-border: rgba(127, 29, 29, 0.25);
    --glow-primary: rgba(22, 163, 74, 0.3);
    --on-primary: #fff7ed;
    --bg-dark: #7f1d1d;
    --overlay-dark: rgba(127, 29, 29, 0.5);
    --modal-overlay: rgba(69, 10, 10, 0.86);
    --chip-bg: rgba(127, 29, 29, 0.07);
    --chip-border: rgba(127, 29, 29, 0.2);
    --paper-shadow: 8px 8px 0 rgba(127, 29, 29, 0.12);
    --paper-border: 1px solid rgba(127, 29, 29, 0.2);
}

body[data-theme="contrast"] {
    --bg-paper: #000000;
    --paper-card: #000000;
    --primary: #ffffff;
    --secondary: #f3f4f6;
    --accent: #ffff00;
    --tech-green: #00ffff;
    --bg-card: #000000;
    --glass-border: rgba(255, 255, 255, 0.85);
    --glow-primary: rgba(255, 255, 0, 0.45);
    --on-primary: #000000;
    --bg-dark: #000000;
    --overlay-dark: rgba(0, 0, 0, 0.9);
    --modal-overlay: rgba(0, 0, 0, 0.95);
    --chip-bg: rgba(255, 255, 255, 0.08);
    --chip-border: rgba(255, 255, 255, 0.85);
    --paper-shadow: 0 0 0 rgba(0, 0, 0, 0);
    --paper-border: 2px solid #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-paper);
    color: var(--primary);
    font-family: var(--font-body);
    overflow-x: hidden;
    line-height: 1.6;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    /* Blueprint Grid + Paper Texture */
    background-image: 
        linear-gradient(rgba(59, 130, 246, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.05) 1px, transparent 1px),
        url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='paperNoise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23paperNoise)'/%3E%3C/svg%3E");
    background-size: 40px 40px, 40px 40px, auto;
    opacity: 0.15;
    z-index: -3;
    pointer-events: none;
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    /* Repeating Technical Code Pattern */
    background-image: url("data:image/svg+xml,%3Csvg width='500' height='500' xmlns='http://www.w3.org/2000/svg'%3E%3Ctext x='10' y='30' font-family='monospace' font-size='14' fill='%233b82f6' opacity='0.5'%3Eimport %7B developer %7D from 'life';%3C/text%3E%3Ctext x='10' y='60' font-family='monospace' font-size='14' fill='%233b82f6' opacity='0.5'%3Efunction build() %7B return 'extraordinary'; %7D%3C/text%3E%3Ctext x='10' y='90' font-family='monospace' font-size='14' fill='%233b82f6' opacity='0.5'%3Econst status = 'ONLINE';%3C/text%3E%3Ctext x='10' y='120' font-family='monospace' font-size='14' fill='%233b82f6' opacity='0.5'%3Econsole.log(status);%3C/text%3E%3Ctext x='10' y='150' font-family='monospace' font-size='14' fill='%233b82f6' opacity='0.5'%3E0x5AF3 [MODULE_01]%3C/text%3E%3Ctext x='250' y='200' font-family='monospace' font-size='14' fill='%233b82f6' opacity='0.5'%3E%3Cdiv class='logic'%3E%3C/div%3E%3C/text%3E%3Ctext x='250' y='230' font-family='monospace' font-size='14' fill='%233b82f6' opacity='0.5'%3Estruct_init: true;%3C/text%3E%3Ctext x='250' y='260' font-family='monospace' font-size='14' fill='%233b82f6' opacity='0.5'%3Eif (ideas) set(creative);%3C/text%3E%3C/svg%3E");
    background-size: 500px 500px;
    background-repeat: repeat;
    opacity: 0.25; /* Properly visible pattern */
    z-index: -2;
    pointer-events: none;
    filter: blur(0px);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Typography Selection */
::selection {
    background: color-mix(in srgb, var(--accent) 30%, transparent);
    color: var(--on-primary);
}

/* Background Media Container (Video & WebGL) */
#bg-video,
#webgl-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
}

#bg-video {
    object-fit: cover;
    z-index: -4;
    opacity: 0.2; /* Subtle visibility */
}

/* WebGL Background - Styled as subtle sketch/noise */
#webgl-canvas {
    z-index: -1;
    opacity: 0.1;
    filter: sepia(20%) contrast(90%);
}

/* Custom Cursor System */
.cursor-dot {
    position: fixed;
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    z-index: 10000;
    pointer-events: none;
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s, opacity 0.3s;
}

.cursor-crosshair-h, .cursor-crosshair-v {
    position: fixed;
    background: transparent;
    border: 0.5px dashed var(--accent);
    opacity: 0.06; /* Very subtle drafting lines */
    pointer-events: none;
    z-index: 9999;
}

.cursor-crosshair-h {
    left: 0;
    width: 100vw;
    height: 0;
    transform: translateY(-50%);
}

.cursor-crosshair-v {
    top: 0;
    width: 0;
    height: 100vh;
    transform: translateX(-50%);
}

.cursor-coords {
    position: fixed;
    z-index: 10000;
    pointer-events: none;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--secondary);
    opacity: 0.6;
    background: rgba(255, 255, 255, 0.5); /* Semi-transparent background for readability */
    padding: 0.2rem 0.4rem;
    border: 1px solid rgba(59, 130, 246, 0.1);
}

/* Helper Classes - Papermorphism + Blueprint */
.glass, .glass-card {
    background: var(--paper-card);
    border: var(--paper-border);
    box-shadow: var(--paper-shadow);
    border-radius: 0; /* Pure brutalist/blueprint feel */
    transition: var(--transition);
    position: relative;
    padding: 3rem;
}

.glass-card::before {
    content: '[0x' attr(data-index) ']';
    position: absolute;
    top: 10px;
    right: 15px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--secondary);
    opacity: 0.6;
}

.glass-card:hover {
    transform: translate(-4px, -4px);
    box-shadow: 12px 12px 0 var(--accent);
}

.text-gradient {
    color: var(--accent); /* No gradients, solid blueprint blue */
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: var(--paper-card);
    border-bottom: var(--paper-border);
    border-radius: 0;
    transition: var(--transition);
}

.theme-switcher {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    margin-left: 1rem;
    padding: 0.35rem;
    border-radius: 999px;
    border: 1px solid var(--glass-border);
    background: color-mix(in srgb, var(--paper-card) 86%, transparent);
    box-shadow: 0 4px 14px color-mix(in srgb, var(--primary) 10%, transparent);
}

.theme-toggle-btn,
.theme-select-btn {
    border: var(--paper-border);
    background: var(--paper-card);
    color: var(--primary);
    font-family: var(--font-mono);
    font-size: 0.78rem;
}

.theme-toggle-btn {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 50%;
}

.theme-toggle-btn:hover {
    color: var(--accent);
    transform: translate(-2px, -2px);
}

.theme-dropdown {
    position: relative;
}

.theme-select-btn {
    min-width: 130px;
    height: 38px;
    padding: 0.45rem 0.7rem 0.45rem 0.8rem;
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.6rem;
    cursor: pointer;
    outline: none;
    border-radius: 999px;
    font-weight: 600;
    transition: var(--transition), box-shadow 0.2s ease;
}

.theme-select-btn i {
    font-size: 1.05rem;
    color: var(--accent);
    transition: transform 0.2s ease;
}

.theme-dropdown.open .theme-select-btn i {
    transform: rotate(180deg);
}

.theme-select-btn:hover {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 16%, transparent);
}

.theme-select-btn:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 24%, transparent);
}

.theme-options {
    position: absolute;
    top: calc(100% + 0.45rem);
    left: 0;
    width: 100%;
    list-style: none;
    margin: 0;
    padding: 0.35rem;
    background: var(--paper-card);
    border: var(--paper-border);
    border-radius: 14px;
    box-shadow: 0 12px 24px color-mix(in srgb, var(--primary) 15%, transparent);
    opacity: 0;
    transform: translateY(-6px);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 1010;
}

.theme-dropdown.open .theme-options {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.theme-option {
    width: 100%;
    text-align: left;
    border: 1px solid transparent;
    background: transparent;
    color: var(--primary);
    font-family: var(--font-mono);
    font-size: 0.74rem;
    padding: 0.5rem 0.6rem;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
}

.theme-option:hover {
    background: var(--chip-bg);
    border-color: var(--glass-border);
}

.theme-option.active {
    background: color-mix(in srgb, var(--accent) 16%, transparent);
    color: var(--accent);
    border-color: color-mix(in srgb, var(--accent) 35%, transparent);
}

body[data-theme="contrast"] .theme-toggle-btn,
body[data-theme="contrast"] .theme-select-btn {
    box-shadow: none;
}

.navbar.scrolled {
    top: 1rem;
    left: 5%;
    width: 90%;
    padding: 1rem 3rem;
    background: var(--paper-card);
    backdrop-filter: blur(10px);
    border: var(--paper-border);
    border-radius: 50px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.logo {
    font-family: var(--font-head);
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--primary);
}

.logo .dot {
    color: var(--accent);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-links li a {
    text-decoration: none;
    color: var(--primary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    font-family: var(--font-mono);
    border-radius: 8px;
}

.nav-links li a:hover {
    color: var(--accent);
    background: var(--chip-bg);
}

.nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    line-height: 1;
    min-height: 40px;
    padding: 0.7rem 1.15rem !important;
    color: var(--primary) !important;
    border: 2px solid var(--primary);
    border-radius: 999px;
    transition: var(--transition);
}

.nav-btn:hover {
    background: var(--primary);
    color: var(--on-primary) !important;
}

.navbar.scrolled .nav-btn {
    min-height: 38px;
    padding: 0.62rem 1.05rem !important;
    border-radius: 999px;
}

.hamburger {
    display: none;
    font-size: 2rem;
    cursor: pointer;
    z-index: 1001;
    color: var(--primary);
}

@keyframes navGlowPulse {
    0%,
    100% {
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35), 0 0 0 rgba(99, 102, 241, 0);
    }

    50% {
        box-shadow: 0 14px 34px rgba(0, 0, 0, 0.45), 0 0 20px rgba(99, 102, 241, 0.22);
    }
}

@keyframes logoFloat {
    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-2px);
    }
}

@keyframes liquidFlow {
    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

@keyframes liquidWobble {
    0%,
    100% {
        transform: translateY(0) scale(1);
    }

    50% {
        transform: translateY(1px) scale(1.015);
    }
}

/* Base Sections */
.section {
    min-height: 100vh;
    padding: 6rem 5% 2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.section-header {
    margin-bottom: 4rem;
    text-align: center;
}

.section-title {
    font-family: var(--font-head);
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--primary);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--secondary);
}

/* Buttons */
/* Buttons - Paper Style */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem 2rem;
    border-radius: 0;
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.primary-btn {
    background: var(--primary);
    color: var(--on-primary);
    border: 2px solid var(--primary);
}

.primary-btn:hover {
    background: transparent;
    color: var(--primary);
    transform: translate(-3px, -3px);
    box-shadow: 6px 6px 0 var(--primary);
}

.secondary-btn {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.secondary-btn:hover {
    background: rgba(0, 0, 0, 0.05);
    transform: translate(-3px, -3px);
    box-shadow: 6px 6px 0 var(--primary);
}

/* Hero Section - Blueprint Layout */
.hero {
    position: relative;
    align-items: center;
    text-align: left; /* Left align for technical drawing feel */
    padding: 12rem 5% 6rem;
}

.hero::after {
    content: '';
    position: absolute;
    top: 5%;
    right: 5%;
    width: 300px;
    height: 400px;
    border: 1px dashed var(--accent);
    opacity: 0.2;
    background-image: 
        radial-gradient(circle at 50% 50%, var(--accent) 1px, transparent 1px);
    background-size: 20px 20px;
    z-index: -1;
}

.hero-title {
    font-family: var(--font-head);
    font-size: clamp(3.5rem, 9vw, 8rem);
    font-weight: 800;
    line-height: 0.9;
    margin-bottom: 2rem;
    color: var(--primary);
    text-transform: uppercase;
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 400;
    color: var(--accent);
    margin-bottom: 4rem;
    background: rgba(59, 130, 246, 0.05);
    padding: 0.8rem 1.5rem;
    border-left: 4px solid var(--accent);
}

.hero-btns {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

/* Technical Scroll Indicator - Blueprint Schematic */
/* Innovative "Schematic Data-Flow" Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 4.5%; /* Corner-aligned for schematic feel */
    display: flex;
    align-items: flex-end;
    gap: 1.2rem;
    z-index: 20;
    pointer-events: none;
}

.scroll-line {
    width: 2px;
    height: 120px;
    background: repeating-linear-gradient(
        to bottom,
        var(--accent) 0,
        var(--accent) 6px,
        transparent 6px,
        transparent 12px
    );
    position: relative;
    opacity: 0.3;
}

.data-pulse {
    position: absolute;
    top: 0;
    left: -2px;
    width: 6px;
    height: 20px;
    background: var(--tech-green);
    box-shadow: 0 0 15px var(--tech-green);
    animation: dataFlow 2.5s infinite cubic-bezier(1, 0, 0, 1);
}

@keyframes dataFlow {
    0% { top: -20px; opacity: 0; }
    30% { opacity: 1; }
    70% { opacity: 1; }
    100% { top: 120px; opacity: 0; }
}

.scroll-coord {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    background: var(--paper-card);
    border: 1px solid var(--primary);
    padding: 0.6rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--primary);
    transform: translateY(10px);
}

.scroll-coord .label {
    letter-spacing: 2px;
    font-weight: 800;
    color: var(--accent);
}

.scroll-coord .cursor {
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

/* Cleanup: Remove mouse CSS */
.mouse, .wheel {
    display: none;
}

@keyframes heroGlassFloat {
    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-6px);
    }
}

@keyframes heroGlassShine {
    0%,
    20% {
        left: -130%;
    }

    60%,
    100% {
        left: 180%;
    }
}

@keyframes backgroundDrift {
    0% {
        transform: scale(1.06) translate3d(-8px, -6px, 0);
        background-position: 46% 18%;
    }

    50% {
        transform: scale(1.08) translate3d(6px, 4px, 0);
        background-position: 52% 22%;
    }

    100% {
        transform: scale(1.07) translate3d(-4px, 8px, 0);
        background-position: 48% 20%;
    }
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.2rem;
    margin-bottom: 5rem;
}

.about-text {
    position: relative;
    border-radius: 24px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    transition: var(--transition);
}

.icon-wrap {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 2rem;
    transition: var(--transition);
}

.glass-card:hover .icon-wrap {
    background: var(--primary);
    color: var(--on-primary);
    box-shadow: 0 0 20px var(--glow-primary);
}

.about-text h3 {
    font-family: var(--font-head);
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.about-text p {
    color: var(--secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Skills */
/* Skills - Blueprint Style */
.subsection-title {
    font-family: var(--font-head);
    font-size: 2rem;
    text-align: center;
    margin-bottom: 4rem;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.skills-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 2.5rem; /* More breathing room */
}

.skill-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.8rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--primary);
    font-weight: 700;
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: var(--chip-bg);
    border: 1px solid var(--chip-border);
    position: relative;
    padding: 2px;
}

.progress {
    height: 100%;
    background: var(--accent);
    width: 0;
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: repeating-linear-gradient(
        45deg,
        rgba(255, 255, 255, 0.1),
        rgba(255, 255, 255, 0.1) 5px,
        transparent 5px,
        transparent 10px
    );
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
}

.project-card {
    border-radius: 0;
    background: var(--paper-card);
    border: var(--paper-border);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translate(-6px, -6px);
    box-shadow: 12px 12px 0 var(--accent);
}

.project-img-wrapper {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.project-img {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 0.6s ease;
    background-color: #1a1a2e;
}

/* Dummy Project Backgrounds */
.bg-1 {
    background-image: linear-gradient(45deg, #100f1c, #2d2b55);
}

.bg-2 {
    background-image: linear-gradient(45deg, #1a1025, #4a2b55);
}

.bg-3 {
    background-image: linear-gradient(45deg, #0f1c1a, #2b554e);
}

.project-card:hover .project-img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--overlay-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.4s ease;
}

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

.view-btn {
    width: 50px;
    height: 50px;
    background: var(--chip-bg);
    backdrop-filter: blur(5px);
    border: 1px solid var(--chip-border);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--primary);
    font-size: 1.5rem;
    text-decoration: none;
    transform: translateY(20px);
    transition: all 0.4s ease;
}

.project-card:hover .view-btn {
    transform: translateY(0);
}

.view-btn:hover {
    background: var(--accent);
    color: var(--on-primary);
    transform: scale(1.1) translateY(0) !important;
}

.project-info {
    padding: 1.5rem;
}

.project-category {
    font-size: 0.75rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 800;
    font-family: var(--font-mono);
}

.project-title {
    font-family: var(--font-head);
    font-size: 1.5rem;
    margin: 0.5rem 0;
    color: var(--primary);
}

.project-desc {
    color: var(--secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.project-tech span {
    padding: 0.3rem 0.8rem;
    background: var(--chip-bg);
    border: 1px solid var(--chip-border);
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--primary);
    border-radius: 20px;
}

/* Experience */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, var(--accent), var(--tech-green), transparent);
    left: 20px;
    top: 0;
    opacity: 0.3;
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 3rem;
    transition: transform 0.3s ease;
}

.timeline-item:hover {
    transform: translateX(10px);
}

.timeline-dot {
    position: absolute;
    left: 14px;
    top: 24px;
    width: 14px;
    height: 14px;
    background: var(--bg-dark);
    border: 2px solid var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent);
    z-index: 2;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Experience Timeline - Blueprint Schematic */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 4rem auto;
    border-left: 2px dashed var(--accent);
}

.timeline-item {
    margin-bottom: 6rem;
    position: sticky;
    top: 120px;
    padding-left: 4rem;
    z-index: 1;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2px;
    top: 15px;
    width: 20px;
    height: 2px;
    background: var(--accent);
}

.timeline-dot {
    position: absolute;
    left: -11px;
    top: 10px;
    width: 20px;
    height: 20px;
    background: var(--bg-paper);
    border: 2px solid var(--accent);
    z-index: 2;
}

.timeline-content {
    background: var(--paper-card);
    border: 1px solid var(--primary);
    padding: 2.5rem;
    position: relative;
    box-shadow: 10px 10px 0 rgba(59, 130, 246, 0.05);
    min-height: 280px;
    height: auto;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: 0.7rem;
    border-radius: 22px;
    overflow: hidden;
}

.timeline-content::after {
    content: 'ENTRY_LOG';
    position: absolute;
    top: 12px;
    right: 16px;
    left: auto;
    background: var(--primary);
    color: var(--on-primary);
    font-family: var(--font-mono);
    font-size: 0.6rem;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    z-index: 2;
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 0.35rem;
    display: block;
}

.timeline-title {
    line-height: 1.3;
}

.timeline-org,
.timeline-desc {
    line-height: 1.6;
    word-break: break-word;
}

/* Contact Section - Technical Block */
.contact-wrapper {
    background: var(--paper-card);
    border: 1px solid var(--primary);
    padding: 5rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    position: relative;
    border-radius: 26px;
    overflow: hidden;
}

.contact-wrapper::before {
    content: 'COMMUNICATION_MODULE_01';
    position: absolute;
    top: 14px;
    right: 1.4rem;
    background: var(--accent);
    color: var(--on-primary);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.3rem 1rem;
    border-radius: 999px;
}

.contact-info h2 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 0.95;
    color: var(--primary);
    text-transform: uppercase;
}

.contact-details {
    margin: 4rem 0;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--secondary);
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--accent);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-icon {
    width: 45px;
    height: 45px;
    border: 1px solid var(--primary);
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--primary);
    transition: var(--transition);
}

.social-icon:hover {
    background: var(--primary);
    color: var(--on-primary);
    transform: translate(-3px, -3px);
    box-shadow: 6px 6px 0 var(--accent);
}

.input-group {
    position: relative;
    margin-bottom: 3.5rem;
    border-bottom: 1px solid var(--primary);
}

.input-group input,
.input-group textarea {
    width: 100%;
    padding: 1rem 0;
    background: transparent;
    border: none;
    color: var(--primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    outline: none;
}

.input-group label {
    position: absolute;
    left: 0;
    top: 1rem;
    color: var(--secondary);
    transition: var(--transition);
    pointer-events: none;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    text-transform: uppercase;
    opacity: 0.7;
}

.input-group input:focus ~ label,
.input-group input:not(:placeholder-shown) ~ label,
.input-group textarea:focus ~ label,
.input-group textarea:not(:placeholder-shown) ~ label {
    top: -1.5rem;
    font-size: 0.7rem;
    color: var(--accent);
    opacity: 1;
}

.submit-btn {
    width: 100%;
    justify-content: center;
    padding: 1.2rem;
    background: var(--primary);
    color: var(--on-primary);
    border: 1px solid var(--primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.submit-btn:hover {
    background: transparent;
    color: var(--primary);
    transform: translate(-5px, -5px);
    box-shadow: 10px 10px 0 var(--accent);
}

/* Footer */
footer {
    padding: 5rem 5% 4rem;
    text-align: right;
    border-top: 1px dashed var(--accent);
    margin-top: 6rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.footer-status {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--secondary);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    justify-content: flex-end;
}

.status-dot {
    width: 6px;
    height: 6px;
    background: var(--tech-green);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--tech-green);
    animation: blink 1.5s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

footer p {
    color: var(--secondary);
}
/* Mobile & Tablet Optimizations */
@media (max-width: 900px) {
    .navbar {
        padding: 1rem 4%;
        gap: 0.6rem;
    }

    .logo {
        font-size: 1rem;
        max-width: 42vw;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .theme-select-btn {
        min-width: 118px;
        height: 34px;
        font-size: 0.72rem;
        padding: 0.34rem 0.55rem 0.34rem 0.65rem;
    }

    .theme-toggle-btn {
        width: 34px;
        height: 34px;
    }

    .section {
        padding: 5rem 5% 3rem;
    }

    .hero {
        text-align: center;
        padding: 10rem 5% 4rem;
    }

    .hero::after {
        display: none;
    }

    .hero-title {
        font-size: clamp(2.5rem, 12vw, 4rem);
    }

    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 2rem;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        padding: 3rem 1.5rem;
        gap: 3rem;
    }

    .contact-wrapper::before {
        left: 1.5rem;
    }

    .contact-info h2 {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .theme-switcher {
        margin-left: auto;
        margin-right: 0.6rem;
        gap: 0.45rem;
    }

    .theme-select-btn {
        min-width: 102px;
        font-size: 0.68rem;
        padding: 0.3rem 0.48rem 0.3rem 0.56rem;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: var(--paper-card);
        border-left: 2px solid var(--primary);
        flex-direction: column;
        justify-content: center;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1001;
        padding: 4rem;
        box-shadow: -10px 0 30px rgba(30, 41, 59, 0.1);
        display: flex; /* Override display:none from previous replace */
    }

    .nav-links li a {
        width: 100%;
        text-align: center;
        font-size: 1rem;
    }

    .nav-links.active {
        right: 0;
    }

    .hamburger {
        display: block;
        z-index: 1002;
        color: var(--primary);
    }

    .hero-title {
        font-size: 3rem;
    }
}

@media (max-width: 600px) {
    .navbar {
        padding: 0.8rem 0.9rem;
    }

    .logo {
        max-width: 33vw;
        font-size: 0.86rem;
        letter-spacing: 0.5px;
    }

    .theme-select-btn {
        min-width: 92px;
        font-size: 0.62rem;
        padding: 0.26rem 0.42rem 0.26rem 0.5rem;
    }

    .theme-toggle-btn {
        width: 30px;
        height: 30px;
    }

    .hamburger {
        font-size: 1.6rem;
    }

    .navbar.scrolled {
        padding: 0.7rem 0.9rem;
        top: 0.8rem;
        width: 94%;
        left: 3%;
        border-radius: 30px;
    }

    .hero-btns {
        flex-direction: column;
        gap: 1.5rem;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .timeline-item {
        padding-left: 2.5rem;
        margin-bottom: 2.5rem;
    }

    .timeline-content {
        padding: 1.5rem;
    }

    .contact-wrapper {
        padding: 2.5rem 1rem;
        gap: 2rem;
    }

    .contact-wrapper::before {
        left: 1rem;
        font-size: 0.6rem;
    }

    .contact-info h2 {
        font-size: 2rem;
    }
}

/* Certificate Modal */
.cert-modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: var(--modal-overlay);
    backdrop-filter: blur(10px);
}

.cert-modal-content {
    position: relative;
    margin: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    max-width: 90vw;
    max-height: 90vh;
}

.cert-modal-close {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f8fafc;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    z-index: 10001;
}

.cert-modal-close:hover,
.cert-modal-close:focus {
    color: var(--accent);
    text-decoration: none;
}

.cert-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.cert-loading {
    color: #f8fafc;
    font-family: var(--font-mono);
    font-size: 1.2rem;
    text-align: center;
}

/* Certificate Button */
.cert-btn {
    margin-top: auto;
    padding: 0.8rem 1.5rem;
    background: var(--accent);
    color: var(--on-primary);
    border: none;
    border-radius: 999px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 4px 4px 0 rgba(59, 130, 246, 0.2);
}

.cert-btn:hover {
    background: var(--primary);
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--accent);
}

.cert-btn i {
    font-size: 1.1rem;
}

/* Mobile Modal */
@media (max-width: 768px) {
    .cert-modal-content {
        max-width: 95vw;
        max-height: 95vh;
    }

    .cert-modal-close {
        top: 10px;
        right: 20px;
        font-size: 30px;
        padding: 10px;
        background: rgba(0, 0, 0, 0.5);
        border-radius: 50%;
        width: 50px;
        height: 50px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .cert-btn {
        padding: 0.6rem 1rem;
        font-size: 0.8rem;
    }

    .cert-loading {
        font-size: 1rem;
    }
}