/* ========================================
   SAKETH SARIDENA - PORTFOLIO
   Dark Theme with Warm Amber Accents
   ======================================== */

/* ===== CSS VARIABLES ===== */
:root {
    /* Dark Theme Colors - Warm Neutral */
    --bg-primary: #0f0f0f;
    --bg-secondary: #141414;
    --bg-card: #1a1a1a;
    --bg-card-hover: #222222;

    /* Accent Colors - Warm Amber + Terracotta */
    --accent-primary: #E8A838;
    --accent-secondary: #D4764E;
    --accent-gradient: linear-gradient(135deg, #E8A838 0%, #D4764E 100%);
    --accent-gradient-hover: linear-gradient(135deg, #F0B840 0%, #E08858 100%);
    --accent-glow: rgba(232, 168, 56, 0.15);
    --accent-glow-strong: rgba(232, 168, 56, 0.3);

    /* Text Colors - Warm */
    --text-primary: #F0EDE8;
    --text-secondary: #A8A29E;
    --text-muted: #78716C;
    --text-accent: #E8A838;

    /* Borders */
    --border-color: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(232, 168, 56, 0.3);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(232, 168, 56, 0.1);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Playfair Display', 'Georgia', serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-spring: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse 600px 600px at 15% 20%, rgba(232, 168, 56, 0.03) 0%, transparent 70%),
        radial-gradient(ellipse 500px 500px at 85% 60%, rgba(212, 118, 78, 0.03) 0%, transparent 70%),
        radial-gradient(ellipse 400px 400px at 50% 90%, rgba(232, 168, 56, 0.02) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
    pointer-events: none;
    z-index: 0;
}

::selection {
    background: rgba(232, 168, 56, 0.3);
    color: #fff;
}

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

img {
    max-width: 100%;
    display: block;
}

ul {
    list-style: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== SKIP LINK (Accessibility) ===== */
.skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    background: var(--accent-primary);
    color: var(--bg-primary);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    z-index: 10000;
    transition: top 0.3s;
}

.skip-link:focus {
    top: 16px;
}

/* ===== NAVBAR ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all var(--transition-base);
    backdrop-filter: blur(0px);
    animation: navSlideDown 0.6s ease forwards;
}

@keyframes navSlideDown {
    from {
        opacity: 0;
        transform: translateY(-100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.navbar.scrolled {
    padding: 10px 0;
    background: rgba(15, 15, 15, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-svg {
    transition: all var(--transition-base);
}

.logo-svg .logo-border {
    stroke-dasharray: 160;
    stroke-dashoffset: 160;
    animation: drawLogo 1.5s ease forwards 0.3s;
}

@keyframes drawLogo {
    to {
        stroke-dashoffset: 0;
    }
}

.logo-text {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 4px 0;
    transition: color var(--transition-fast);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition-base);
    border-radius: 2px;
}

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

.nav-resume-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    border: 1px solid var(--accent-primary);
    border-radius: 8px;
    color: var(--accent-primary);
    font-size: 0.85rem;
    font-weight: 600;
    transition: all var(--transition-base);
}

.nav-resume-btn:hover {
    background: rgba(232, 168, 56, 0.1);
    box-shadow: 0 0 20px rgba(232, 168, 56, 0.15);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    right: -100%;
    width: 75%;
    max-width: 360px;
    height: 100vh;
    background: rgba(15, 15, 26, 0.98);
    backdrop-filter: blur(30px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 28px;
    z-index: 999;
    transition: right var(--transition-slow);
    border-left: 1px solid var(--border-color);
}

.mobile-menu::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.6);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
    z-index: -1;
}

.mobile-menu.active::before {
    opacity: 1;
    visibility: visible;
}

.mobile-menu.active {
    right: 0;
}

.mobile-link {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.mobile-link:hover {
    color: var(--accent-primary);
}

.mobile-resume-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border: 1px solid var(--accent-primary);
    border-radius: 8px;
    color: var(--accent-primary);
    font-weight: 600;
    margin-top: 12px;
}

/* ===== HERO SECTION ===== */
.hero {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    padding: 140px 24px 40px;
}

.hero-content {
    max-width: var(--container-width);
    width: 100%;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.hero-name {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5.5vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 12px;
    letter-spacing: -2px;
}

.hero-tagline {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-primary);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 20px;
    padding: 6px 14px;
    border: 1px solid rgba(232, 168, 56, 0.25);
    border-radius: 6px;
    background: rgba(232, 168, 56, 0.05);
}

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

.hero-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 560px;
    line-height: 1.8;
    margin-bottom: 32px;
}

.hero-description strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* CTA Buttons */
.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

/* Social links in hero (below CTA) */
.hero-social-links {
    display: flex;
    gap: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #0f0f0f;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(232, 168, 56, 0.3);
}

.btn-primary i {
    transition: transform var(--transition-base);
}

.btn-primary:hover i {
    transform: translateX(4px);
}

.btn-outline {
    background: transparent;
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
}

.btn-outline:hover {
    background: rgba(232, 168, 56, 0.08);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(232, 168, 56, 0.1);
}

.btn-lg {
    padding: 18px 40px;
    font-size: 1.05rem;
}

/* Hero Image */
.hero-image-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.hero-image-container {
    position: relative;
    width: 360px;
    height: 430px;
    border-radius: 20px;
    overflow: hidden;
}

.image-glow {
    position: absolute;
    inset: -20px;
    background: var(--accent-gradient);
    opacity: 0.15;
    filter: blur(40px);
    z-index: 0;
    animation: glowPulse 4s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.1; }
    50% { opacity: 0.25; }
}

.image-border-animated {
    position: absolute;
    inset: 0;
    border-radius: 20px;
    padding: 2px;
    background: var(--accent-gradient);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    z-index: 2;
    animation: borderRotate 6s linear infinite;
}

@keyframes borderRotate {
    0% { opacity: 0.6; }
    50% { opacity: 1; }
    100% { opacity: 0.6; }
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    border-radius: 20px;
    position: relative;
    z-index: 1;
    filter: brightness(0.95) contrast(1.05);
}

.social-link {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-base);
    background: rgba(255, 255, 255, 0.02);
}

.social-link:hover {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    background: rgba(232, 168, 56, 0.05);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(232, 168, 56, 0.15);
}

/* CTA Banner */
.cta-banner {
    padding: 80px 0;
    position: relative;
    z-index: 1;
    background: linear-gradient(135deg, rgba(232, 168, 56, 0.04) 0%, rgba(212, 118, 78, 0.04) 100%);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.cta-banner-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-banner-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-banner-text {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

/* ===== SECTIONS ===== */
.section {
    padding: var(--section-padding);
    position: relative;
    z-index: 1;
}

.section-alt {
    background: var(--bg-secondary);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 60px;
    display: flex;
    align-items: center;
    gap: 16px;
    letter-spacing: -1px;
}

.section-number {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--accent-primary);
    font-weight: 600;
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, rgba(232, 168, 56, 0.3), transparent);
    max-width: 300px;
}

/* ===== ABOUT SECTION ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1rem;
    line-height: 1.8;
}

.about-text strong {
    color: var(--text-primary);
    font-weight: 600;
}

.about-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 32px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: 10px;
    background: rgba(232, 168, 56, 0.05);
    border: 1px solid rgba(232, 168, 56, 0.1);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.highlight-item:hover {
    background: rgba(232, 168, 56, 0.08);
    border-color: rgba(232, 168, 56, 0.2);
    transform: translateX(4px);
}

.highlight-item i {
    color: var(--accent-primary);
    font-size: 1rem;
}

/* Code Card */
.about-card {
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    box-shadow: var(--shadow-lg);
    animation: floatCard 6s ease-in-out infinite;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--border-color);
}

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

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #28c840; }

.card-title {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.card-body {
    padding: 24px;
}

.card-body pre {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.9;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
}

.code-keyword { color: #c792ea; }
.code-class { color: #82aaff; }
.code-func { color: #82aaff; }
.code-string { color: #c3e88d; }
.code-number { color: #f78c6c; }

/* ===== EXPERIENCE / TIMELINE ===== */
.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-primary), var(--accent-secondary), transparent);
}

.timeline-item {
    position: relative;
    margin-bottom: 48px;
}

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

.timeline-marker {
    position: absolute;
    left: -40px;
    top: 8px;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.marker-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-gradient);
    box-shadow: 0 0 15px rgba(232, 168, 56, 0.4);
    position: relative;
}

.marker-dot::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid rgba(232, 168, 56, 0.3);
}

.timeline-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
    transition: all var(--transition-base);
    will-change: transform;
}

.timeline-content:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
    transform: translateX(4px);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 8px;
}

.timeline-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.timeline-company {
    font-size: 0.9rem;
    color: var(--accent-primary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
}

.timeline-company i {
    font-size: 0.8rem;
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.timeline-details {
    margin-bottom: 16px;
}

.timeline-details li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.timeline-details li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-primary);
}

.timeline-details li strong {
    color: var(--text-primary);
    font-weight: 600;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.78rem;
    font-weight: 500;
    font-family: var(--font-mono);
    background: rgba(232, 168, 56, 0.08);
    color: var(--accent-primary);
    border: 1px solid rgba(232, 168, 56, 0.15);
}

/* ===== SKILLS SECTION ===== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(350px, 100%), 1fr));
    gap: 24px;
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: all var(--transition-base);
    will-change: transform;
}

.skill-category:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

.skill-icon-wrapper {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.3rem;
    color: #0f0f0f;
}

.skill-category h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

/* Skill Tags */
.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tag {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.skill-tag:hover {
    background: rgba(232, 168, 56, 0.08);
    color: var(--accent-primary);
    border-color: rgba(232, 168, 56, 0.2);
    transform: translateY(-2px);
}

/* ===== PROJECTS ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(350px, 100%), 1fr));
    gap: 24px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    will-change: transform;
}

.project-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(232, 168, 56, 0.12),
                0 0 40px rgba(212, 118, 78, 0.08);
}

.project-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.project-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(232, 168, 56, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
    font-size: 1.2rem;
}

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

.patent-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 6px;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15) 0%, rgba(255, 165, 0, 0.15) 100%);
    color: #ffd700;
    font-size: 0.78rem;
    font-weight: 600;
    border: 1px solid rgba(255, 215, 0, 0.3);
}

.hackathon-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 6px;
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.15) 0%, rgba(0, 200, 100, 0.15) 100%);
    color: #00ff88;
    font-size: 0.78rem;
    font-weight: 600;
    border: 1px solid rgba(0, 255, 136, 0.3);
}

.project-title {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.project-card:hover .project-title {
    color: var(--accent-primary);
}

.project-description {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
    flex-grow: 1;
}

.project-impact {
    display: flex;
    gap: 24px;
    margin-bottom: 20px;
    padding: 16px;
    border-radius: 10px;
    background: rgba(232, 168, 56, 0.05);
    border: 1px solid rgba(232, 168, 56, 0.1);
}

.impact-metric {
    text-align: center;
}

.impact-number {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
}

.impact-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 500;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: auto;
}

.project-tags span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 4px;
}

/* ===== PUBLICATIONS ===== */
.publications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(350px, 100%), 1fr));
    gap: 24px;
}

.pub-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: all var(--transition-base);
    will-change: transform;
}

.pub-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.pub-type {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.pub-type.patent {
    background: rgba(255, 215, 0, 0.1);
    color: #ffd700;
    border: 1px solid rgba(255, 215, 0, 0.2);
}

.pub-type.publication {
    background: rgba(232, 168, 56, 0.1);
    color: var(--accent-primary);
    border: 1px solid rgba(232, 168, 56, 0.2);
}

.pub-type.conference {
    background: rgba(212, 118, 78, 0.1);
    color: var(--accent-secondary);
    border: 1px solid rgba(212, 118, 78, 0.2);
}

.pub-card h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
    line-height: 1.4;
}

.pub-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.pub-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.pub-meta span {
    font-size: 0.82rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.pub-meta i {
    color: var(--accent-primary);
    font-size: 0.8rem;
}

/* ===== EDUCATION ===== */
.education-grid {
    display: grid;
    gap: 24px;
}

.edu-card {
    display: flex;
    gap: 28px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: all var(--transition-base);
    will-change: transform;
}

.edu-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
    transform: translateX(4px);
}

.edu-logo {
    width: 60px;
    height: 60px;
    min-width: 60px;
    border-radius: 16px;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: #0f0f0f;
}

.edu-content h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.edu-degree {
    font-size: 0.95rem;
    color: var(--accent-primary);
    font-weight: 500;
    display: block;
    margin-bottom: 12px;
}

.edu-details {
    display: flex;
    gap: 24px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.edu-gpa, .edu-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.edu-gpa i {
    color: #ffd700;
}

.edu-date i {
    color: var(--accent-primary);
}

.edu-coursework {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.edu-coursework span {
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.78rem;
    background: rgba(232, 168, 56, 0.06);
    color: var(--text-secondary);
    border: 1px solid rgba(232, 168, 56, 0.1);
}

/* ===== CONTACT ===== */
.contact-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.contact-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 24px 16px;
    border-radius: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.contact-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.contact-card i {
    font-size: 1.5rem;
    color: var(--accent-primary);
    margin-bottom: 4px;
}

.contact-card-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-card-value {
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

.contact-location {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 32px;
    color: var(--text-secondary);
    font-size: 1.15rem;
    font-weight: 500;
}

.contact-location i {
    color: var(--accent-primary);
}

/* ===== FOOTER ===== */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    position: relative;
    z-index: 1;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.footer-name {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -1px;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 1.1rem;
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    color: var(--accent-primary);
    transform: translateY(-2px);
}

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

/* ===== BACK TO TOP BUTTON ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--accent-gradient);
    color: var(--bg-primary);
    border: none;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 999;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.back-to-top:hover {
    box-shadow: 0 8px 30px rgba(232, 168, 56, 0.3);
    transform: translateY(-3px);
}

/* ===== ANIMATIONS ===== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-social-links {
        justify-content: center;
    }

    .hero-image-container {
        width: 300px;
        height: 360px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 70px 0;
    }

    .nav-links, .nav-resume-btn {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .mobile-menu {
        display: flex;
    }

    .logo-text {
        font-size: 0.8rem;
    }

    .hero {
        padding: 100px 20px 40px;
    }

    .hero-image-container {
        width: 220px;
        height: 270px;
    }

    .hero-content {
        gap: 36px;
    }

    .hero-description {
        font-size: 0.95rem;
    }

    .section-title {
        font-size: 1.6rem;
        margin-bottom: 40px;
    }

    .section-title::after {
        display: none;
    }

    .timeline {
        padding-left: 30px;
    }

    .timeline-marker {
        left: -30px;
    }

    .timeline-header {
        flex-direction: column;
    }

    .timeline-details li {
        font-size: 0.9rem;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .publications-grid {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .edu-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .edu-details {
        justify-content: center;
    }

    .edu-coursework {
        justify-content: center;
    }

    .about-highlights {
        grid-template-columns: 1fr;
    }

    .about-card {
        animation: none;
    }

    .contact-cards {
        grid-template-columns: 1fr 1fr;
    }

    .project-impact {
        flex-direction: column;
        gap: 12px;
    }

    /* Code card smaller text on mobile */
    .card-body pre {
        font-size: 0.72rem;
        line-height: 1.7;
    }

    .card-body {
        padding: 16px;
    }

    /* CTA banner tighter on mobile */
    .cta-banner {
        padding: 50px 0;
    }

    .cta-banner-text {
        font-size: 0.95rem;
    }

    /* Back to top smaller and closer to edge */
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 90px 16px 30px;
    }

    .hero-name {
        font-size: 2.2rem;
        letter-spacing: -1px;
    }

    .hero-tagline {
        font-size: 0.75rem;
        letter-spacing: 1.5px;
        padding: 5px 12px;
    }

    .hero-description {
        font-size: 0.9rem;
        line-height: 1.7;
    }

    .hero-image-container {
        width: 200px;
        height: 250px;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

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

    .container {
        padding: 0 16px;
    }

    .contact-cards {
        grid-template-columns: 1fr;
    }

    .contact-text {
        font-size: 0.95rem;
    }

    /* Tighter section spacing on small phones */
    .section-title {
        font-size: 1.4rem;
        margin-bottom: 32px;
    }

    .timeline-item {
        margin-bottom: 36px;
    }

    .project-card {
        padding: 20px;
    }

    .pub-card {
        padding: 20px;
    }

    .skill-category {
        padding: 20px;
    }
}

/* ===== PREFERS REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ===== PROJECT MODAL ===== */
.project-card[data-project],
.pub-card[data-pub] {
    cursor: pointer;
}

.project-card[data-project]::after,
.pub-card[data-pub]::after {
    content: 'Click to explore →';
    display: block;
    margin-top: 12px;
    font-size: 0.78rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    opacity: 0;
    transform: translateX(-8px);
    transition: all var(--transition-base);
}

.project-card[data-project]:hover::after,
.pub-card[data-pub]:hover::after {
    opacity: 1;
    transform: translateX(0);
    color: var(--accent-primary);
}

.project-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0);
    backdrop-filter: blur(0px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
}

.project-modal-overlay.active {
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(12px);
    opacity: 1;
    visibility: visible;
}

.project-modal {
    position: relative;
    width: 90%;
    max-width: 720px;
    max-height: 85vh;
    background: var(--bg-card);
    border: 1px solid var(--border-hover);
    border-radius: 24px;
    overflow: hidden;
    transform: translateY(40px) scale(0.95);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.6),
                0 0 60px rgba(232, 168, 56, 0.08);
}

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

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: rgba(15, 15, 15, 0.8);
    backdrop-filter: blur(10px);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: all var(--transition-base);
}

.modal-close:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: rotate(90deg);
}

.modal-scroll {
    max-height: 85vh;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(232, 168, 56, 0.2) transparent;
}

.modal-scroll::-webkit-scrollbar {
    width: 6px;
}

.modal-scroll::-webkit-scrollbar-thumb {
    background: rgba(232, 168, 56, 0.2);
    border-radius: 3px;
}

.modal-header {
    padding: 40px 40px 24px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(180deg, rgba(232, 168, 56, 0.04) 0%, transparent 100%);
}

.modal-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--font-mono);
    margin-bottom: 12px;
    background: rgba(232, 168, 56, 0.1);
    color: var(--accent-primary);
    border: 1px solid rgba(232, 168, 56, 0.2);
}

.modal-badge.hackathon {
    background: linear-gradient(135deg, rgba(0, 255, 136, 0.15) 0%, rgba(0, 200, 100, 0.15) 100%);
    color: #00ff88;
    border-color: rgba(0, 255, 136, 0.3);
}

.modal-badge.patent {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15) 0%, rgba(255, 165, 0, 0.15) 100%);
    color: #ffd700;
    border-color: rgba(255, 215, 0, 0.3);
}

.modal-title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
    line-height: 1.3;
}

.modal-subtitle {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.modal-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1px;
    background: var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.modal-metric {
    padding: 20px;
    background: var(--bg-card);
    text-align: center;
}

.modal-metric-value {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 4px;
}

.modal-metric-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.modal-body {
    padding: 32px 40px;
}

.modal-section {
    margin-bottom: 28px;
}

.modal-section:last-child {
    margin-bottom: 0;
}

.modal-section h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-section h3 i {
    color: var(--accent-primary);
    font-size: 0.85rem;
}

.modal-section p,
.modal-section ul {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.modal-section ul {
    padding-left: 0;
    list-style: none;
}

.modal-section ul li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
}

.modal-section ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-primary);
}

.modal-section strong {
    color: var(--text-primary);
    font-weight: 600;
}

.modal-tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.modal-tech-tags span {
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 500;
    font-family: var(--font-mono);
    background: rgba(232, 168, 56, 0.08);
    color: var(--accent-primary);
    border: 1px solid rgba(232, 168, 56, 0.15);
}

.modal-footer {
    padding: 20px 40px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.modal-footer a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all var(--transition-base);
}

.modal-footer .modal-btn-github {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.modal-footer .modal-btn-github:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.08);
}

/* Modal Responsive */
@media (max-width: 768px) {
    .project-modal {
        width: 95%;
        max-height: 90vh;
        border-radius: 20px;
    }

    .modal-header {
        padding: 32px 24px 20px;
    }

    .modal-title {
        font-size: 1.3rem;
    }

    .modal-body {
        padding: 24px;
    }

    .modal-footer {
        padding: 16px 24px;
    }

    .modal-metrics {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .project-modal {
        width: 100%;
        max-height: 95vh;
        border-radius: 20px 20px 0 0;
        align-self: flex-end;
    }

    .modal-metrics {
        grid-template-columns: 1fr 1fr;
    }

    .modal-header {
        padding: 28px 20px 16px;
    }

    .modal-body {
        padding: 20px;
    }

    .modal-footer {
        padding: 16px 20px;
        flex-direction: column;
    }

    .modal-footer a {
        justify-content: center;
    }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: rgba(232, 168, 56, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(232, 168, 56, 0.4);
}