/* ============================================
   ALEX CHEN - VIDEO EDITOR PORTFOLIO
   Black & Yellow Aesthetic
   ============================================ */

/* CSS Variables */
:root {
    --color-bg: #0a0a0a;
    --color-bg-secondary: #111111;
    --color-bg-tertiary: #1a1a1a;
    --color-text: #ffffff;
    --color-text-muted: #888888;
    --color-text-dim: #555555;
    --color-accent: #FFD700;
    --color-accent-dark: #CC9900;
    --color-border: #222222;
    
    --font-display: 'Clash Display', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

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

/* Container */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: var(--transition-medium);
}

.nav--scrolled {
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(20px);
    padding: 1rem 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: -0.02em;
}

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

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition-medium);
}

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

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

.nav-link--cta {
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
    padding: 0.75rem 1.5rem;
    border-radius: 0;
}

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

.nav-link--cta:hover {
    background: var(--color-accent);
    color: var(--color-bg);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-fast);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 6rem 2rem;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255, 215, 0, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 215, 0, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(60px, 60px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
}

.hero-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.2s forwards;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 10vw, 7rem);
    font-weight: 600;
    line-height: 0.95;
    letter-spacing: -0.03em;
    margin-bottom: 2rem;
}

.hero-title-line {
    display: block;
    opacity: 0;
    transform: translateY(40px);
    animation: fadeInUp 1s var(--ease-out-expo) forwards;
}

.hero-title-line:nth-child(1) { animation-delay: 0.4s; }
.hero-title-line:nth-child(2) { animation-delay: 0.5s; }
.hero-title-line:nth-child(3) { animation-delay: 0.6s; }

.hero-title-line--accent {
    color: var(--color-accent);
    position: relative;
}

.hero-title-line--accent::after {
    content: '';
    position: absolute;
    bottom: 0.1em;
    left: -0.1em;
    right: -0.1em;
    height: 0.15em;
    background: var(--color-accent);
    opacity: 0.2;
    z-index: -1;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto 3rem;
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-out-expo) 0.8s forwards;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-out-expo) 1s forwards;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.5rem;
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border: none;
    cursor: pointer;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.btn--primary {
    background: var(--color-accent);
    color: var(--color-bg);
}

.btn--primary:hover {
    background: var(--color-accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 215, 0, 0.2);
}

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

.btn--outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn--full {
    width: 100%;
}

/* Hero Scroll Indicator */
.hero-scroll {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    opacity: 0;
    animation: fadeIn 1s ease 1.5s forwards;
}

.hero-scroll span {
    font-size: 0.625rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-dim);
}

.hero-scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
    50% { opacity: 1; transform: scaleY(1); }
}

@keyframes fadeIn {
    to { opacity: 1; }
}

/* ============================================
   SECTION HEADERS
   ============================================ */
.section-header {
    margin-bottom: 4rem;
    display: flex;
    align-items: baseline;
    gap: 1.5rem;
}

.section-header--center {
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.section-number {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-accent);
    letter-spacing: 0.1em;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 500px;
}

/* ============================================
   WORK SECTION
   ============================================ */
.work {
    padding: 8rem 0;
    background: var(--color-bg-secondary);
}

.work-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.work-item {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
    cursor: pointer;
}

.work-item--featured {
    grid-column: span 2;
    grid-row: span 2;
    aspect-ratio: auto;
}

.work-image {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.work-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-medium);
}

.work-image-icon {
    font-size: 3rem;
    color: var(--color-accent);
    opacity: 0;
    transform: scale(0.8);
    transition: var(--transition-medium);
}

.work-item:hover .work-image-placeholder {
    transform: scale(1.05);
}

.work-item:hover .work-image-icon {
    opacity: 1;
    transform: scale(1);
}

.work-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, transparent 60%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 2rem;
    opacity: 0;
    transition: var(--transition-medium);
}

.work-item:hover .work-overlay {
    opacity: 1;
}

.work-category {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.work-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 500;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
    padding: 8rem 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: center;
}

.about-text {
    max-width: 600px;
}

.about-lead {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: 1.5rem;
    color: var(--color-text);
}

.about-text p {
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.about-stats {
    display: flex;
    gap: 3rem;
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 1px solid var(--color-border);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-accent);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.about-image {
    display: flex;
    justify-content: center;
}

.about-image-frame {
    position: relative;
    width: 400px;
    height: 500px;
}

.about-image-frame::before {
    content: '';
    position: absolute;
    inset: 20px;
    border: 1px solid var(--color-accent);
    z-index: 1;
    pointer-events: none;
}

.about-image-placeholder {
    width: 100%;
    height: 100%;
    background: var(--color-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-image-placeholder span {
    font-family: var(--font-display);
    font-size: 8rem;
    font-weight: 700;
    color: var(--color-accent);
    opacity: 0.1;
}

/* ============================================
   SERVICES SECTION
   ============================================ */
.services {
    padding: 8rem 0;
    background: var(--color-bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.service-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    padding: 2.5rem;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-medium);
}

.service-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-5px);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    color: var(--color-accent);
    margin-bottom: 1.5rem;
}

.service-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.service-desc {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ============================================
   CLIENTS SECTION
   ============================================ */
.clients {
    padding: 4rem 0;
    overflow: hidden;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.clients-label {
    text-align: center;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-dim);
    margin-bottom: 2rem;
}

.clients-marquee {
    position: relative;
}

.clients-marquee::before,
.clients-marquee::after {
    content: '';
    position: absolute;
    top: 0;
    width: 150px;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.clients-marquee::before {
    left: 0;
    background: linear-gradient(to right, var(--color-bg), transparent);
}

.clients-marquee::after {
    right: 0;
    background: linear-gradient(to left, var(--color-bg), transparent);
}

.clients-track {
    display: flex;
    gap: 4rem;
    animation: marquee 30s linear infinite;
}

.client-name {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-text-dim);
    white-space: nowrap;
    transition: var(--transition-fast);
}

.client-name:hover {
    color: var(--color-accent);
}

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

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
    padding: 8rem 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 6rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.form-group {
    position: relative;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-text);
    transition: var(--transition-fast);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-accent);
}

.form-group label {
    position: absolute;
    left: 0;
    top: 1rem;
    font-size: 1rem;
    color: var(--color-text-muted);
    pointer-events: none;
    transition: var(--transition-fast);
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group select:focus + label,
.form-group select:valid + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -0.5rem;
    font-size: 0.75rem;
    color: var(--color-accent);
}

.form-group select {
    appearance: none;
    cursor: pointer;
}

.form-group select option {
    background: var(--color-bg);
    color: var(--color-text);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
    padding-top: 1rem;
}

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.contact-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-dim);
}

.contact-link {
    font-size: 1.125rem;
    color: var(--color-text);
    transition: var(--transition-fast);
}

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

.contact-value {
    font-size: 1.125rem;
    color: var(--color-text);
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-link {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
    position: relative;
}

.social-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: var(--transition-medium);
}

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

.social-link:hover::after {
    width: 100%;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: 4rem 0;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent);
}

.footer-tagline {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: 0.5rem;
}

.footer-links {
    display: flex;
    gap: 2.5rem;
}

.footer-link {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.footer-copyright,
.footer-credit {
    font-size: 0.75rem;
    color: var(--color-text-dim);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .work-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .work-item--featured {
        grid-column: span 2;
        grid-row: span 1;
        aspect-ratio: 16/9;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content {
        gap: 3rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero {
        padding: 8rem 1.5rem;
    }
    
    .container {
        padding: 0 1.5rem;
    }
    
    .work-grid {
        grid-template-columns: 1fr;
    }
    
    .work-item--featured {
        grid-column: span 1;
        aspect-ratio: 16/10;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        order: -1;
    }
    
    .about-image-frame {
        width: 280px;
        height: 350px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        flex-wrap: wrap;
        gap: 2rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
}

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

/* Custom Cursor */
.cursor {
    width: 20px;
    height: 20px;
    border: 1px solid var(--color-accent);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    transition: transform 0.15s ease, opacity 0.15s ease;
    mix-blend-mode: difference;
}

.cursor.hover {
    transform: scale(2);
    background: var(--color-accent);
    opacity: 0.5;
}

/* Selection */
::selection {
    background: var(--color-accent);
    color: var(--color-bg);
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

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