/* ============================================
   SU CHEN PORTFOLIO - BLACK & GOLD THEME
   ============================================ */

:root {
    --black: #0a0a0a;
    --black-light: #111111;
    --black-lighter: #1a1a1a;
    --black-card: #141414;
    --gold: #c9a84c;
    --gold-light: #e8d48b;
    --gold-dark: #a07c1c;
    --gold-glow: rgba(201, 168, 76, 0.3);
    --gold-subtle: rgba(201, 168, 76, 0.08);
    --white: #f0ece2;
    --white-dim: #a09a8c;
    --gray: #666;
    --gray-dark: #333;
    --font-display: 'Cormorant Garamond', 'Noto Serif SC', serif;
    --font-body: 'Outfit', 'Noto Serif SC', sans-serif;
    --font-mono: 'Space Mono', monospace;
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
}

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

::selection { background: var(--gold); color: var(--black); }

html {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--gold-dark) var(--black);
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: var(--gold-dark); border-radius: 3px; }

body {
    font-family: var(--font-body);
    background: var(--black);
    color: var(--white);
    overflow-x: hidden;
    cursor: none;
}

a { color: inherit; text-decoration: none; cursor: none; }
button { cursor: none; }
img { max-width: 100%; display: block; }
.gold { color: var(--gold); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

/* ============================================
   CUSTOM CURSOR
   ============================================ */
.cursor-dot {
    width: 6px; height: 6px;
    background: var(--gold);
    border-radius: 50%;
    position: fixed; top: 0; left: 0;
    pointer-events: none; z-index: 10001;
    transition: transform 0.1s;
    transform: translate(-50%, -50%);
}
.cursor-ring {
    width: 36px; height: 36px;
    border: 1.5px solid var(--gold);
    border-radius: 50%;
    position: fixed; top: 0; left: 0;
    pointer-events: none; z-index: 10000;
    transition: width 0.3s, height 0.3s, border-color 0.3s;
    transform: translate(-50%, -50%);
    opacity: 0.5;
}
.cursor-ring.hover {
    width: 56px; height: 56px;
    border-color: var(--gold-light);
    opacity: 1;
}

@media (max-width: 768px) {
    .cursor-dot, .cursor-ring { display: none; }
    body { cursor: auto; }
    a, button { cursor: pointer; }
}

/* ============================================
   LOADER
   ============================================ */
.loader {
    position: fixed; inset: 0;
    background: var(--black);
    z-index: 9999;
    display: flex; align-items: center; justify-content: center;
    transition: opacity 0.6s, visibility 0.6s;
}
.loader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.loader-inner { text-align: center; }
.loader-logo {
    font-family: var(--font-display);
    font-size: 4rem; font-weight: 300;
    color: var(--gold);
    letter-spacing: 0.3em;
    margin-bottom: 2rem;
    animation: loaderPulse 1.5s ease infinite;
}
@keyframes loaderPulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}
.loader-bar {
    width: 200px; height: 2px;
    background: var(--gray-dark);
    margin: 0 auto 1rem;
    overflow: hidden;
}
.loader-progress {
    height: 100%; width: 0;
    background: var(--gold);
    transition: width 0.3s;
}
.loader-text {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.3em;
    color: var(--gray);
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed; top: 0; left: 0; right: 0;
    padding: 1.2rem 2rem;
    display: flex; align-items: center; justify-content: space-between;
    z-index: 1000;
    transition: background 0.4s, padding 0.4s, backdrop-filter 0.4s;
}
.nav.scrolled {
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(20px);
    padding: 0.8rem 2rem;
    border-bottom: 1px solid rgba(201, 168, 76, 0.1);
}
.nav-logo-text {
    font-family: var(--font-display);
    font-size: 1.8rem; font-weight: 300;
    letter-spacing: 0.15em;
    color: var(--white);
}
.nav-links {
    display: flex; gap: 2rem;
}
.nav-link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--white-dim);
    position: relative;
    transition: color 0.3s;
}
.nav-link::after {
    content: ''; position: absolute;
    bottom: -4px; left: 0;
    width: 0; height: 1px;
    background: var(--gold);
    transition: width 0.3s var(--ease-out-expo);
}
.nav-link:hover, .nav-link.active { color: var(--gold); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

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

.lang-toggle {
    background: none; border: 1px solid var(--gray-dark);
    color: var(--white-dim);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.4rem 0.8rem;
    letter-spacing: 0.1em;
    transition: all 0.3s;
    border-radius: 2px;
}
.lang-toggle:hover { border-color: var(--gold); color: var(--gold); }
.lang-toggle .lang-zh, .lang-toggle .lang-en { transition: color 0.3s; }
.lang-toggle.en .lang-en { color: var(--gold); }
.lang-toggle:not(.en) .lang-zh { color: var(--gold); }

.nav-menu-btn {
    display: none;
    flex-direction: column; gap: 5px;
    background: none; border: none;
    padding: 5px;
}
.nav-menu-btn span {
    display: block; width: 24px; height: 1.5px;
    background: var(--white);
    transition: all 0.3s;
}
.nav-menu-btn.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-menu-btn.active span:nth-child(2) { opacity: 0; }
.nav-menu-btn.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-menu {
    position: fixed; inset: 0;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(30px);
    z-index: 999;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden;
    transition: all 0.4s;
}
.mobile-menu.active { opacity: 1; visibility: visible; }
.mobile-menu-links { text-align: center; }
.mobile-menu-links a {
    display: block;
    font-family: var(--font-display);
    font-size: 2.5rem; font-weight: 300;
    color: var(--white-dim);
    padding: 0.5rem;
    transition: color 0.3s;
}
.mobile-menu-links a:hover { color: var(--gold); }

@media (max-width: 900px) {
    .nav-links { display: none; }
    .nav-menu-btn { display: flex; }
}

/* Scroll Progress */
.scroll-progress {
    position: fixed; top: 0; left: 0;
    height: 2px; width: 0;
    background: linear-gradient(90deg, var(--gold-dark), var(--gold), var(--gold-light));
    z-index: 1001;
    transition: width 0.1s;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    height: 100vh; min-height: 700px;
    display: flex; align-items: center; justify-content: center;
    overflow: hidden;
}

#particleCanvas {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
}

.hero-grid-overlay {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(201, 168, 76, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(201, 168, 76, 0.03) 1px, transparent 1px);
    background-size: 80px 80px;
    pointer-events: none;
}

.hero-content {
    position: relative; z-index: 2;
    text-align: center;
    padding: 0 2rem;
}

.hero-tag {
    display: inline-flex; align-items: center; gap: 1rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 2rem;
    opacity: 0; transform: translateY(20px);
    animation: heroFadeUp 1s var(--ease-out-expo) 0.5s forwards;
}
.hero-tag-line {
    display: inline-block;
    width: 40px; height: 1px;
    background: var(--gold);
}

.hero-title {
    font-family: var(--font-display);
    font-weight: 300;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}
.hero-title-line { display: block; overflow: hidden; }
.hero-title-line:first-child { font-size: clamp(1.8rem, 4vw, 3rem); }
.hero-name { font-size: clamp(3.5rem, 10vw, 8rem); margin-top: 0.2em; }
.hero-title-word {
    display: inline-block;
    opacity: 0; transform: translateY(100%);
    animation: heroWordUp 1s var(--ease-out-expo) forwards;
}
.hero-title-word:nth-child(1) { animation-delay: 0.7s; }
.hero-title-word:nth-child(2) { animation-delay: 0.85s; }
.hero-name .hero-title-word { animation-delay: 1s; }

@keyframes heroWordUp {
    to { opacity: 1; transform: translateY(0); }
}
@keyframes heroFadeUp {
    to { opacity: 1; transform: translateY(0); }
}

.hero-sub {
    font-family: var(--font-body);
    font-size: clamp(0.85rem, 1.5vw, 1.05rem);
    font-weight: 300;
    color: var(--white-dim);
    letter-spacing: 0.1em;
    margin-bottom: 2.5rem;
    opacity: 0; transform: translateY(20px);
    animation: heroFadeUp 1s var(--ease-out-expo) 1.2s forwards;
}

.hero-cta {
    display: flex; gap: 1rem;
    justify-content: center;
    opacity: 0; transform: translateY(20px);
    animation: heroFadeUp 1s var(--ease-out-expo) 1.4s forwards;
}

.btn {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    padding: 1rem 2.5rem;
    border: none;
    position: relative;
    overflow: hidden;
    transition: all 0.4s var(--ease-out-expo);
}
.btn-primary {
    background: var(--gold);
    color: var(--black);
}
.btn-primary:hover {
    background: var(--gold-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(201, 168, 76, 0.3);
}
.btn-outline {
    background: transparent;
    border: 1px solid var(--gold);
    color: var(--gold);
}
.btn-outline:hover {
    background: var(--gold);
    color: var(--black);
    transform: translateY(-2px);
}
.btn-full { width: 100%; }

.hero-scroll {
    position: absolute;
    bottom: 2rem; left: 50%;
    transform: translateX(-50%);
    display: flex; flex-direction: column;
    align-items: center; gap: 0.8rem;
    opacity: 0;
    animation: heroFadeUp 1s var(--ease-out-expo) 1.8s forwards;
}
.hero-scroll span {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--gray);
}
.hero-scroll-line {
    width: 1px; height: 50px;
    background: linear-gradient(to bottom, var(--gold), transparent);
    animation: scrollLine 2s ease infinite;
}
@keyframes scrollLine {
    0% { opacity: 0; transform: scaleY(0); transform-origin: top; }
    50% { opacity: 1; transform: scaleY(1); transform-origin: top; }
    50.01% { transform-origin: bottom; }
    100% { opacity: 0; transform: scaleY(0); transform-origin: bottom; }
}

/* ============================================
   SECTIONS COMMON
   ============================================ */
.section {
    padding: 8rem 0;
    position: relative;
}

.section-header {
    margin-bottom: 4rem;
    position: relative;
}
.section-number {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.3em;
    color: var(--gold);
    display: block;
    margin-bottom: 0.5rem;
}
.section-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 300;
    letter-spacing: 0.05em;
}
.section-line {
    width: 60px; height: 1px;
    background: var(--gold);
    margin-top: 1.5rem;
}

/* Reveal Animations */
.reveal-up, .reveal-left, .reveal-right {
    opacity: 0;
    transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
    transition-delay: var(--delay, 0s);
}
.reveal-up { transform: translateY(60px); }
.reveal-left { transform: translateX(-60px); }
.reveal-right { transform: translateX(60px); }
.reveal-up.revealed, .reveal-left.revealed, .reveal-right.revealed {
    opacity: 1; transform: translate(0);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    align-items: center;
}
.about-image-frame {
    position: relative;
    aspect-ratio: 3/4;
    overflow: hidden;
}
.about-image-placeholder {
    width: 100%; height: 100%;
    background: linear-gradient(135deg, var(--black-lighter), var(--black-card));
    display: flex; align-items: center; justify-content: center;
    border: 1px solid rgba(201, 168, 76, 0.1);
}
.about-avatar-icon {
    font-family: var(--font-display);
    font-size: 5rem; font-weight: 300;
    color: var(--gold);
    opacity: 0.4;
}
.about-image-border {
    position: absolute;
    top: 12px; left: 12px; right: -12px; bottom: -12px;
    border: 1px solid var(--gold);
    z-index: -1;
    opacity: 0.3;
}
.about-image-tag {
    display: inline-block;
    margin-top: 1rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: var(--gold);
    border: 1px solid var(--gold);
    padding: 0.3rem 0.8rem;
}
.about-greeting {
    font-family: var(--font-display);
    font-size: 1.8rem; font-weight: 400;
    margin-bottom: 1.5rem;
    color: var(--gold-light);
}
.about-desc {
    font-size: 0.95rem;
    line-height: 1.9;
    color: var(--white-dim);
    margin-bottom: 1rem;
    font-weight: 300;
}
.about-stats {
    display: flex; gap: 3rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(201, 168, 76, 0.1);
}
.about-stat { text-align: center; }
.about-stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem; font-weight: 300;
    color: var(--white);
    display: block;
}
.about-stat-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    color: var(--gray);
    text-transform: uppercase;
    margin-top: 0.3rem;
    display: block;
}

@media (max-width: 768px) {
    .about-grid { grid-template-columns: 1fr; gap: 2rem; }
    .about-image-frame { max-width: 280px; margin: 0 auto; }
    .about-stats { gap: 1.5rem; }
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills { background: var(--black-light); }
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.skill-category {
    background: var(--black-card);
    border: 1px solid rgba(201, 168, 76, 0.08);
    padding: 2.5rem 2rem;
    transition: border-color 0.4s, transform 0.4s;
}
.skill-category:hover {
    border-color: rgba(201, 168, 76, 0.25);
    transform: translateY(-4px);
}
.skill-category-icon { font-size: 2rem; margin-bottom: 1rem; }
.skill-category-title {
    font-family: var(--font-display);
    font-size: 1.4rem; font-weight: 400;
    margin-bottom: 1.5rem;
    color: var(--gold-light);
}
.skill-items { display: flex; flex-direction: column; gap: 1.2rem; }
.skill-name {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    color: var(--white-dim);
    margin-bottom: 0.4rem;
    display: block;
}
.skill-bar {
    height: 3px;
    background: var(--gray-dark);
    overflow: hidden;
}
.skill-fill {
    height: 100%; width: 0;
    background: linear-gradient(90deg, var(--gold-dark), var(--gold));
    transition: width 1.2s var(--ease-out-expo);
}
.skill-fill.animated { width: var(--level); }

.tools-section {
    margin-top: 4rem;
    text-align: center;
}
.tools-title {
    font-family: var(--font-display);
    font-size: 1.5rem; font-weight: 300;
    margin-bottom: 2rem;
    color: var(--white-dim);
}
.tools-grid {
    display: flex; flex-wrap: wrap;
    justify-content: center; gap: 1rem;
}
.tool-item {
    width: 64px; height: 64px;
    background: var(--black-card);
    border: 1px solid rgba(201, 168, 76, 0.1);
    display: flex; align-items: center; justify-content: center;
    transition: all 0.3s;
    position: relative;
}
.tool-item:hover {
    border-color: var(--gold);
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(201, 168, 76, 0.15);
}
.tool-item::after {
    content: attr(data-tooltip);
    position: absolute; bottom: calc(100% + 8px);
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    color: var(--gold);
    background: var(--black-card);
    border: 1px solid rgba(201, 168, 76, 0.2);
    padding: 0.3rem 0.6rem;
    white-space: nowrap;
    opacity: 0; transform: translateY(4px);
    transition: all 0.3s;
    pointer-events: none;
}
.tool-item:hover::after { opacity: 1; transform: translateY(0); }
.tool-icon {
    font-family: var(--font-mono);
    font-size: 0.8rem; font-weight: 700;
    color: var(--gold);
}

@media (max-width: 768px) {
    .skills-grid { grid-template-columns: 1fr; }
}

/* ============================================
   GALLERY SECTION
   ============================================ */
.gallery-filters {
    display: flex; gap: 0.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}
.gallery-filter {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    padding: 0.6rem 1.5rem;
    background: transparent;
    border: 1px solid var(--gray-dark);
    color: var(--white-dim);
    transition: all 0.3s;
}
.gallery-filter:hover, .gallery-filter.active {
    border-color: var(--gold);
    color: var(--gold);
    background: var(--gold-subtle);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
    grid-auto-flow: dense;
}
.gallery-item {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
    background: var(--black-card);
    border: 1px solid rgba(201, 168, 76, 0.05);
    transition: all 0.5s var(--ease-out-expo);
}
.gallery-item.wide {
    grid-column: span 2;
}
.gallery-item.tall {
    grid-row: span 2;
    aspect-ratio: auto;
}
.gallery-item img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--ease-out-expo);
}
.gallery-item:hover img {
    transform: scale(1.08);
}
.gallery-item-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(to top, rgba(10,10,10,0.9) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.4s;
    display: flex; align-items: flex-end;
    padding: 1.5rem;
}
.gallery-item:hover .gallery-item-overlay { opacity: 1; }
.gallery-item-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--gold-light);
}
.gallery-item-cat {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gray);
    margin-top: 0.3rem;
}
.gallery-item.hidden {
    display: none;
}

.gallery-note {
    text-align: center;
    margin-top: 2rem;
    padding: 1rem;
    border: 1px dashed rgba(201, 168, 76, 0.2);
}
.gallery-note p {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--gray);
    letter-spacing: 0.05em;
}

/* Lightbox */
.lightbox {
    position: fixed; inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 2000;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden;
    transition: all 0.4s;
}
.lightbox.active { opacity: 1; visibility: visible; }
.lightbox-content { max-width: 90vw; max-height: 90vh; position: relative; }
.lightbox-content img { max-width: 90vw; max-height: 85vh; object-fit: contain; }
.lightbox-close, .lightbox-prev, .lightbox-next {
    position: absolute;
    background: none; border: none;
    color: var(--white);
    font-size: 2rem;
    z-index: 2001;
    transition: color 0.3s;
    padding: 1rem;
}
.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover { color: var(--gold); }
.lightbox-close { top: 1rem; right: 1rem; }
.lightbox-prev { left: 1rem; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 1rem; top: 50%; transform: translateY(-50%); }
.lightbox-caption {
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--white-dim);
    margin-top: 1rem;
    letter-spacing: 0.1em;
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
.projects { background: var(--black-light); }
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.project-card {
    height: 380px;
    perspective: 1000px;
}
.project-card-inner {
    width: 100%; height: 100%;
    position: relative;
    transition: transform 0.8s var(--ease-out-expo);
    transform-style: preserve-3d;
}
.project-card:hover .project-card-inner { transform: rotateY(180deg); }
.project-card-front, .project-card-back {
    position: absolute; inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    padding: 2.5rem 2rem;
    border: 1px solid rgba(201, 168, 76, 0.1);
    display: flex; flex-direction: column;
    justify-content: center;
}
.project-card-front {
    background: var(--black-card);
    text-align: center;
    align-items: center;
}
.project-card-back {
    background: linear-gradient(135deg, var(--black-card), #1a1510);
    transform: rotateY(180deg);
    border-color: rgba(201, 168, 76, 0.2);
}
.project-icon { font-size: 3rem; margin-bottom: 1.5rem; }
.project-title {
    font-family: var(--font-display);
    font-size: 1.5rem; font-weight: 400;
    color: var(--gold-light);
    margin-bottom: 0.8rem;
}
.project-brief {
    font-size: 0.85rem;
    color: var(--white-dim);
    font-weight: 300;
}
.project-flip-hint {
    position: absolute; bottom: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--gray);
    letter-spacing: 0.15em;
}
.project-card-back h4 {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: var(--gold);
    text-transform: uppercase;
    margin-bottom: 0.8rem;
}
.project-tags {
    display: flex; flex-wrap: wrap; gap: 0.4rem;
    margin-bottom: 1.5rem;
}
.project-tags span {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    padding: 0.25rem 0.6rem;
    border: 1px solid rgba(201, 168, 76, 0.2);
    color: var(--gold);
}
.project-desc {
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--white-dim);
    font-weight: 300;
    margin-bottom: 1.5rem;
}
.project-link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--gold);
    transition: letter-spacing 0.3s;
}
.project-link:hover { letter-spacing: 0.2em; }

@media (max-width: 768px) {
    .projects-grid { grid-template-columns: 1fr; }
    .project-card { height: 340px; }
}

/* ============================================
   TIMELINE SECTION
   ============================================ */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}
.timeline-line {
    position: absolute;
    left: 50%; top: 0; bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom, transparent, var(--gold), transparent);
    transform: translateX(-50%);
}
.timeline-item {
    position: relative;
    width: 50%;
    padding: 0 3rem 3rem;
}
.timeline-item:nth-child(even) { margin-left: 50%; }
.timeline-item:nth-child(odd) { text-align: right; }

.timeline-dot {
    position: absolute;
    width: 12px; height: 12px;
    background: var(--black);
    border: 2px solid var(--gold);
    border-radius: 50%;
    top: 0.5rem;
}
.timeline-item:nth-child(odd) .timeline-dot { right: -6px; }
.timeline-item:nth-child(even) .timeline-dot { left: -6px; }

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: var(--gold);
    margin-bottom: 0.5rem;
}
.timeline-content h3 {
    font-family: var(--font-display);
    font-size: 1.3rem; font-weight: 400;
    margin-bottom: 0.5rem;
    color: var(--gold-light);
}
.timeline-content p {
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--white-dim);
    font-weight: 300;
}

@media (max-width: 768px) {
    .timeline-line { left: 20px; }
    .timeline-item, .timeline-item:nth-child(even) {
        width: 100%; margin-left: 0;
        padding-left: 50px; padding-right: 0;
        text-align: left;
    }
    .timeline-item:nth-child(odd) .timeline-dot,
    .timeline-item:nth-child(even) .timeline-dot { left: 14px; right: auto; }
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact { background: var(--black-light); }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}
.contact-heading {
    font-family: var(--font-display);
    font-size: 2rem; font-weight: 300;
    color: var(--gold-light);
    margin-bottom: 1rem;
}
.contact-desc {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--white-dim);
    font-weight: 300;
    margin-bottom: 2rem;
}
.contact-links { display: flex; flex-direction: column; gap: 1rem; }
.contact-link-item {
    display: flex; align-items: center; gap: 1rem;
    font-size: 0.9rem;
    color: var(--white-dim);
    transition: color 0.3s;
    font-weight: 300;
}
.contact-link-item:hover { color: var(--gold); }
.contact-link-icon { font-size: 1.2rem; }

.contact-form { display: flex; flex-direction: column; gap: 2rem; }
.form-group { position: relative; }
.form-group input, .form-group textarea {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--gray-dark);
    color: var(--white);
    font-family: var(--font-body);
    font-size: 0.9rem;
    padding: 1rem 0 0.5rem;
    outline: none;
    transition: border-color 0.3s;
}
.form-group input:focus, .form-group textarea:focus {
    border-color: var(--gold);
}
.form-group label {
    position: absolute;
    top: 1rem; left: 0;
    font-size: 0.85rem;
    color: var(--gray);
    pointer-events: none;
    transition: all 0.3s;
}
.form-group input:focus ~ label,
.form-group input:valid ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:valid ~ label {
    top: -0.5rem;
    font-size: 0.65rem;
    color: var(--gold);
    letter-spacing: 0.1em;
}
.form-group textarea { resize: vertical; min-height: 80px; }

@media (max-width: 768px) {
    .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: 3rem 0;
    border-top: 1px solid rgba(201, 168, 76, 0.08);
}
.footer-content {
    display: flex; align-items: center;
    justify-content: space-between;
}
.footer-logo {
    font-family: var(--font-display);
    font-size: 1.5rem; font-weight: 300;
}
.footer-text {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    color: var(--gray);
}
.footer-social { display: flex; gap: 1rem; }
.footer-social-link {
    width: 36px; height: 36px;
    border: 1px solid var(--gray-dark);
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--white-dim);
    transition: all 0.3s;
}
.footer-social-link:hover {
    border-color: var(--gold);
    color: var(--gold);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .footer-content { flex-direction: column; gap: 1rem; text-align: center; }
}

/* ============================================
   BACK TO TOP
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 2rem; right: 2rem;
    width: 44px; height: 44px;
    background: var(--black-card);
    border: 1px solid var(--gold);
    color: var(--gold);
    font-size: 1.2rem;
    display: flex; align-items: center; justify-content: center;
    z-index: 100;
    opacity: 0; visibility: hidden;
    transition: all 0.3s;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover {
    background: var(--gold);
    color: var(--black);
    transform: translateY(-3px);
}

/* ============================================
   NOISE OVERLAY
   ============================================ */
body::after {
    content: '';
    position: fixed; inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9998;
    opacity: 0.4;
}