/* ===================================
   CSS Variables - Tech-Forward Theme
   =================================== */
:root {
    /* Dark Theme (Default) - Tech-Forward */
    --bg-color: #0a0a14;
    --bg-secondary: #0f0f1e;
    --text-primary: #ffffff;
    --text-secondary: #b0b5c0;
    --accent-primary: #00d9ff;
    --accent-secondary: #ff006e;
    --accent-tertiary: #b537f2;
    --accent-glow-primary: rgba(0, 217, 255, 0.3);
    --accent-glow-secondary: rgba(255, 0, 110, 0.2);
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.15);
    --card-bg: rgba(15, 15, 30, 0.6);
    --card-border: rgba(0, 217, 255, 0.2);
    --gradient-hero: linear-gradient(135deg, rgba(0, 217, 255, 0.1) 0%, rgba(181, 55, 242, 0.1) 50%, rgba(255, 0, 110, 0.1) 100%);
    --gradient-accent: linear-gradient(135deg, #00d9ff 0%, #b537f2 50%, #ff006e 100%);

    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Outfit', sans-serif;

    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);

    /* Layout */
    --header-height: 80px;
    --container-max-width: 1400px;
    --hero-padding-x: clamp(1.5rem, 5vw, 6rem);
}

/* Light Theme */
[data-theme="light"] {
    --bg-color: #f8f9ff;
    --bg-secondary: #ffffff;
    --text-primary: #0a0a14;
    --text-secondary: #555566;
    --accent-primary: #0066cc;
    --accent-secondary: #ff0055;
    --accent-tertiary: #7c3aed;
    --accent-glow-primary: rgba(0, 102, 204, 0.2);
    --accent-glow-secondary: rgba(255, 0, 85, 0.15);
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(0, 0, 0, 0.12);
    --card-bg: rgba(255, 255, 255, 0.8);
    --card-border: rgba(0, 102, 204, 0.2);
    --gradient-hero: linear-gradient(135deg, rgba(0, 102, 204, 0.08) 0%, rgba(124, 58, 237, 0.08) 50%, rgba(255, 0, 85, 0.08) 100%);
    --gradient-accent: linear-gradient(135deg, #0066cc 0%, #7c3aed 50%, #ff0055 100%);
}

/* ===================================
   Base Styles
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

/* ===================================
   Navigation Bar
   =================================== */
.navbar {
    position: fixed;
    top: -15px;
    left: 315px;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 5%;
    background: transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.nav-logo {
    display: none;
}

.main-logo {
    background: var(--gradient-accent);
    letter-spacing: 2.4px;
    font: 700 24px/38.4px var(--font-heading);
}

.main-logo-text {
    font-weight: 700;
    margin: 18px 0;
}

.nav-links {
    display: flex;
    gap: 3rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    letter-spacing: 0.05em;
    position: relative;
    transition: var(--transition);
    font-weight: 500;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-social {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-social a {
    color: var(--text-secondary);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
}

.nav-social a:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px var(--accent-glow-primary);
    transform: translateY(-2px);
}

/* ===================================
   Theme Toggle Button
   =================================== */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    overflow: hidden;
    margin-left: 1rem;
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px var(--accent-glow-primary);
}

.theme-icon {
    font-size: 1.2rem;
    position: absolute;
    transition: var(--transition);
}

[data-theme="dark"] .theme-icon.sun {
    opacity: 0;
    transform: translateY(20px) rotate(180deg);
}

[data-theme="dark"] .theme-icon.moon {
    opacity: 1;
    transform: translateY(0) rotate(0);
}

[data-theme="light"] .theme-icon.sun {
    opacity: 1;
    transform: translateY(0) rotate(0);
}

[data-theme="light"] .theme-icon.moon {
    opacity: 0;
    transform: translateY(-20px) rotate(-180deg);
}

/* ===================================
   WebGL Canvas
   =================================== */
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
    background: var(--bg-color);
    transition: var(--transition);
}

#canvas-container::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
    pointer-events: none;
    z-index: 1;
}

/* ===================================
   Loader
   =================================== */
.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease;
}

.loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader-content {
    text-align: center;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--glass-border);
    border-radius: 50%;
    border-top-color: var(--accent-primary);
    animation: spin 1s ease-in-out infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ===================================
   Hero Section - Two-Column Layout
   =================================== */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    max-width: 1400px;
    min-height: 564px;
    position: relative;
    margin: 0 auto;
    padding: 80px 60px 0;
    overflow: hidden;
}

/* Left Column - Text Content */
.hero-left {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 549px;
    padding-right: 32px;
    z-index: 10;
}

/* Typography Hierarchy */
.hero-name {
    animation-delay: 0.1s;
    animation-duration: 0.8s;
    animation-fill-mode: both;
    animation-name: heroFadeIn;
    letter-spacing: -2.16px;
    transform: matrix(1, 0, 0, 1, 0, 0);
    margin: -1px -5px 1px 0;
    font: 700 72px/75.6px var(--font-heading);
    color: var(--text-primary);
}

.hero-tagline {
    animation-delay: 0.2s;
    animation-duration: 0.8s;
    animation-fill-mode: both;
    animation-name: heroFadeIn;
    color: rgb(0, 102, 204);
    font-size: 14.4px;
    font-weight: 600;
    letter-spacing: 2.88px;
    line-height: 23px;
    margin-bottom: 24px;
    text-transform: uppercase;
    transform: matrix(1, 0, 0, 1, 0, 0);
}

.hero-description {
    animation-delay: 0.3s;
    animation-duration: 0.8s;
    animation-fill-mode: both;
    animation-name: heroFadeIn;
    color: rgb(85, 85, 102);
    font-weight: 400;
    line-height: 27.2px;
    margin-bottom: 32px;
    max-width: 480px;
    transform: matrix(1, 0, 0, 1, 0, 0);
}

.hero-description p {
    margin: 0;
    padding: 0;
}

.hero-description strong {
    font-weight: 600;
}

/* Stats Row */
.hero-stats {
    display: flex;
    animation-delay: 0.4s;
    animation-duration: 0.8s;
    animation-fill-mode: both;
    animation-name: heroFadeIn;
    border-bottom-style: solid;
    border-bottom-width: 0.666667px;
    border-top-style: solid;
    border-top-width: 0.666667px;
    font-weight: 400;
    gap: 38px;
    margin-bottom: 32px;
    transform: matrix(1, 0, 0, 1, 0, 0);
    padding: 8px 0;
    border: 0.666667px 0px solid rgba(0, 0, 0, 0.12) rgb(10, 10, 20);
}

.stat {
    display: flex;
    flex-direction: column;
    font-weight: 400;
    gap: 4px;
}

.stat-number {
    display: block;
    background-clip: text;
    background-image: linear-gradient(135deg, rgb(0, 102, 204) 0%, rgb(124, 58, 237) 50%, rgb(255, 0, 85) 100%);
    font: 700 24px/28.8px var(--font-heading);
}

.stat-label {
    display: block;
    color: rgb(85, 85, 102);
    font-size: 12.8px;
    font-weight: 400;
    letter-spacing: 0.256px;
    line-height: 20px;
}

/* Right Column - 3D Model Space */
.hero-right {
    position: relative;
    z-index: 5;
    height: calc(100vh - var(--header-height));
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

/* CTA Buttons */
.cta-group {
    display: flex;
    animation-delay: 0.5s;
    animation-duration: 0.8s;
    animation-fill-mode: both;
    animation-name: heroFadeIn;
    flex-wrap: wrap;
    font-weight: 400;
    gap: 16px;
    transform: matrix(1, 0, 0, 1, 0, 0);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: var(--hero-padding-x);
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-secondary);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    animation: heroFadeIn 0.8s ease 0.6s both;
    z-index: 10;
}

.scroll-line {
    width: 50px;
    height: 1px;
    background: linear-gradient(90deg, var(--accent-primary), transparent);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 100%;
    background: var(--accent-primary);
    animation: scrollLine 1.5s infinite;
    box-shadow: 0 0 8px var(--accent-glow-primary);
}

@keyframes scrollLine {
    0% {
        left: -16px;
    }

    100% {
        left: 100%;
    }
}

/* Hero Fade-In Animation */
@keyframes heroFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   Typography
   =================================== */
h2 {
    font-family: var(--font-heading);
    font-size: 3rem;
    margin-bottom: 3rem;
    color: var(--text-primary);
    position: relative;
    letter-spacing: -0.01em;
}

h2::before {
    content: '';
    position: absolute;
    left: 0;
    bottom: -1rem;
    width: 100px;
    height: 4px;
    background: var(--gradient-accent);
    border-radius: 2px;
}

h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

/* ===================================
   Sections
   =================================== */
.section {
    position: relative;
    z-index: 10;
    padding: 6rem 0;
    border-top: 1px solid var(--glass-border);
    transition: var(--transition);
    background: var(--bg-secondary);
    overflow: hidden;
}

.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    opacity: 0.5;
}

.section:nth-child(odd) {
    background: var(--bg-color);
}

.section-title {
    text-align: left;
    margin-bottom: 3rem;
    animation: slideInFromLeft 0.8s ease both;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
}

/* ===================================
   Buttons
   =================================== */
.btn {
    text-decoration: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    letter-spacing: 0.05em;
    transition: var(--transition);
    font-family: var(--font-heading);
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.btn-primary {
    background: var(--gradient-accent);
    color: #000;
    border: 2px solid transparent;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 217, 255, 0.3);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 2px solid var(--glass-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    box-shadow: 0 0 25px var(--accent-glow-primary);
    transform: translateY(-3px);
}

/* ===================================
   Card Grid System
   =================================== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    animation: slideInFromBottom 0.8s ease 0.2s both;
}

.card-grid.two-col {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.card-grid.three-col {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* ===================================
   Cards - Glassmorphism
   =================================== */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 2.5rem;
    border-radius: 12px;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--accent-glow-primary) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 60px rgba(0, 217, 255, 0.2), 0 0 30px var(--accent-glow-primary);
}

.card:hover::before {
    opacity: 0.5;
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.card-date {
    font-size: 0.75rem;
    color: var(--accent-primary);
    background: var(--glass-bg);
    padding: 0.35rem 0.85rem;
    border-radius: 6px;
    border: 1px solid var(--card-border);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-subtitle {
    font-size: 0.9rem;
    color: var(--accent-secondary);
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.card-list {
    list-style: none;
    padding: 0;
    position: relative;
    z-index: 1;
}

.card-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.card-list li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
}

/* ===================================
   Tags
   =================================== */
.tags,
.skill-tags {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.tags span,
.skill-tags span {
    font-size: 0.75rem;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    background: var(--glass-bg);
    color: var(--accent-primary);
    border: 1px solid var(--card-border);
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.tags span:hover,
.skill-tags span:hover {
    background: var(--accent-primary);
    color: var(--bg-color);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--accent-glow-primary);
}

/* ===================================
   Soft Skills Grid
   =================================== */
.soft-skills-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 1rem;
    max-width: 100%;
}

.soft-skill-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 1.25rem 1.75rem;
    border-radius: 8px;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.soft-skill-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--accent-glow-primary) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.soft-skill-item:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px var(--accent-glow-primary);
}

.soft-skill-item:hover::before {
    opacity: 0.3;
}

.soft-skill-icon {
    font-size: 1.5rem;
    position: relative;
    z-index: 1;
}

.soft-skill-item span:nth-child(2) {
    position: relative;
    z-index: 1;
    color: var(--text-primary);
    font-weight: 600;
}

/* ===================================
   Contact Cards
   =================================== */
.contact-card {
    text-align: center;
}

.contact-card a {
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
    word-break: break-word;
    position: relative;
    z-index: 1;
    display: inline-block;
}

.contact-card a:hover {
    color: var(--accent-secondary);
    transform: translateY(-2px);
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--bg-color);
    padding: 3rem 0;
    text-align: center;
    border-top: 1px solid var(--glass-border);
    position: relative;
    z-index: 10;
}

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

.footer-tagline {
    margin-top: 0.5rem;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 0.8rem;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    :root {
        --header-height: 70px;
    }

    .hero {
        grid-template-columns: 1fr;
        text-align: left;
        padding-top: calc(var(--header-height) + 2rem);
    }

    .hero-left {
        min-height: auto;
        padding-right: 0;
        padding-bottom: 4rem;
    }

    .hero-right {
        display: none;
    }

    .hero-name {
        font-size: clamp(2.5rem, 8vw, 3.5rem);
    }

    .hero-description {
        max-width: 100%;
    }

    h2 {
        font-size: 2.5rem;
    }

    .section {
        padding: 4rem 0;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 1rem 5%;
    }

    .nav-links {
        display: none;
    }

    .nav-logo {
        font-size: 1.25rem;
    }

    .hero-name {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }

    .hero-tagline {
        font-size: 0.9rem;
    }

    .hero-description {
        font-size: 1rem;
    }

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

    .stat-number {
        font-size: 1.5rem;
    }

    .cta-group {
        flex-direction: column;
        gap: 1rem;
    }

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

    .section {
        padding: 3rem 0;
    }

    .section-title {
        text-align: center;
    }

    h2::before {
        left: 50%;
        transform: translateX(-50%);
    }

    .card {
        padding: 1.5rem;
    }

    .card-grid,
    .card-grid.two-col,
    .card-grid.three-col {
        grid-template-columns: 1fr;
    }

    .soft-skills-grid {
        justify-content: center;
    }

    .soft-skill-item {
        padding: 1rem 1.5rem;
        font-size: 0.9rem;
    }

    .scroll-indicator {
        display: none;
    }

    h2 {
        font-size: 2rem;
    }
}

/* ===================================
   Animations
   =================================== */
@keyframes slideInFromLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInFromBottom {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card:nth-child(1) {
    animation-delay: 0.1s;
}

.card:nth-child(2) {
    animation-delay: 0.2s;
}

.card:nth-child(3) {
    animation-delay: 0.3s;
}

.card:nth-child(4) {
    animation-delay: 0.4s;
}

.card:nth-child(5) {
    animation-delay: 0.5s;
}

.card:nth-child(6) {
    animation-delay: 0.6s;
}