/* === Custom Properties and Animations === */
@property --border-angle {
    syntax: '<angle>';
    initial-value: 0deg;
    inherits: false;
}

:root {
    --liquid-silver: #c8cdd3;
    --white-flash: #eef1f5;
    --gunmetal: #5a5f6b;
    --midnight-chrome: #0a0a12;
    --neon-lilac: #b48efa;
    --rose-chrome: #e8a0b8;
    --lcd-cyan: #00d4ff;
    --frosted-panel: #1a1a2e;
    --chrome-sweep: linear-gradient(135deg, #5a5f6b 0%, #c8cdd3 30%, #eef1f5 50%, #c8cdd3 70%, #5a5f6b 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--midnight-chrome);
    color: var(--liquid-silver);
    font-family: 'Share Tech Mono', monospace;
    font-size: clamp(0.875rem, 1.1vw, 1.1rem);
    line-height: 1.75;
    letter-spacing: 0.02em;
    overflow-x: hidden;
}

/* === Hangul Watermark === */
#hangul-watermark {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    z-index: 0;
    opacity: 0.02;
}

#hangul-watermark span {
    font-family: 'Noto Sans KR', sans-serif;
    font-weight: 900;
    font-size: 12vw;
    color: var(--liquid-silver);
    display: inline-block;
    padding: 0 1vw;
}

/* === Chrome Header === */
#chrome-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 56px;
    background: linear-gradient(135deg, #c0c0c0 0%, #e8e8e8 25%, #a0a0a0 50%, #d0d0d0 75%, #b0b0b0 100%);
    z-index: 1000;
    border-bottom: 1px solid transparent;
    animation: header-border-cycle 4s linear infinite;
}

@keyframes header-border-cycle {
    0% { border-image: linear-gradient(90deg, #b48efa, #00d4ff, #e8a0b8) 1; }
    33% { border-image: linear-gradient(90deg, #00d4ff, #e8a0b8, #b48efa) 1; }
    66% { border-image: linear-gradient(90deg, #e8a0b8, #b48efa, #00d4ff) 1; }
    100% { border-image: linear-gradient(90deg, #b48efa, #00d4ff, #e8a0b8) 1; }
}

.header-inner {
    max-width: 1280px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 clamp(16px, 2vw, 32px);
}

.logotype {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.logo-text {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--midnight-chrome);
}

.logo-kr {
    font-family: 'Noto Sans KR', sans-serif;
    font-weight: 300;
    font-size: 0.8rem;
    color: var(--gunmetal);
}

.nav-dots {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-dot {
    display: flex;
    align-items: center;
    gap: 0;
    cursor: pointer;
    text-decoration: none;
    overflow: hidden;
}

.dot-circle {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--gunmetal);
    transition: background 0.3s, box-shadow 0.3s;
    flex-shrink: 0;
}

.dot-label {
    font-family: 'Chakra Petch', sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--midnight-chrome);
    max-width: 0;
    overflow: hidden;
    white-space: nowrap;
    transition: max-width 0.4s ease, padding 0.4s ease;
    padding-left: 0;
}

.nav-dot:hover .dot-circle {
    background: var(--neon-lilac);
    box-shadow: 0 0 8px var(--neon-lilac);
}

.nav-dot:hover .dot-label {
    max-width: 100px;
    padding-left: 8px;
}

/* === Hero Section === */
#hero {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--midnight-chrome);
    overflow: hidden;
    padding-top: 56px;
}

.lattice-overlay {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0.06;
    pointer-events: none;
}

.chrome-sphere {
    position: absolute;
    top: 38.2%;
    left: 61.8%;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 30%, #eef1f5 0%, #c8cdd3 20%, #5a5f6b 50%, #1a1a2e 80%, #0a0a12 100%);
    opacity: 0;
    transform: scale(0.5);
    animation: sphere-fadein 800ms ease-out 400ms forwards, sphere-move 1200ms cubic-bezier(0.25, 0.46, 0.45, 0.94) 1200ms forwards, sphere-rotate 20s linear 2400ms infinite;
    will-change: transform, opacity;
    z-index: 2;
}

@keyframes sphere-fadein {
    to { opacity: 1; transform: scale(1); }
}

@keyframes sphere-move {
    from { top: 50%; left: 50%; transform: translate(-50%, -50%) scale(1); }
    to { top: 38.2%; left: 61.8%; transform: translate(-50%, -50%) scale(1); }
}

@keyframes sphere-rotate {
    to { transform: translate(-50%, -50%) scale(1) rotate3d(1, 1, 0, 360deg); }
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
}

.hero-char {
    font-family: 'Noto Sans KR', sans-serif;
    font-weight: 700;
    font-size: clamp(8rem, 20vw, 16rem);
    line-height: 1;
    background: var(--chrome-sweep);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: chrome-shimmer 4s ease infinite;
    opacity: 0;
    animation: hero-char-in 1000ms ease-out 600ms forwards, chrome-shimmer 4s ease 1600ms infinite;
    will-change: opacity, background-position;
}

@keyframes hero-char-in {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes chrome-shimmer {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero-typewriter {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 1rem;
    height: 2rem;
}

.typewriter-text {
    font-family: 'Share Tech Mono', monospace;
    font-size: clamp(1.2rem, 2vw, 1.8rem);
    color: var(--liquid-silver);
    letter-spacing: 0.08em;
    overflow: hidden;
    white-space: nowrap;
    display: inline-block;
    width: 0;
}

.typewriter-cursor {
    display: inline-block;
    width: 2px;
    height: 1.5em;
    background: var(--lcd-cyan);
    margin-left: 2px;
    animation: blink-cursor 1s step-end infinite;
}

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

.hero-subtitle {
    font-family: 'Chakra Petch', sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--gunmetal);
    margin-top: 1.5rem;
    opacity: 0;
    animation: fadein 800ms ease-out 3500ms forwards;
}

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

/* === Diagonal Content Band === */
#content-band {
    position: relative;
    z-index: 1;
}

.diagonal-divider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    clip-path: polygon(0 0, 100% 15%, 100% 100%, 0 85%);
    background: linear-gradient(180deg, var(--frosted-panel) 0%, var(--midnight-chrome) 100%);
    pointer-events: none;
    z-index: -1;
}

.content-upper, .content-lower {
    position: relative;
    max-width: 1280px;
    margin: 0 auto;
    padding: clamp(48px, 8vw, 120px) clamp(16px, 2vw, 32px);
}

.content-grid {
    display: grid;
    grid-template-columns: 7fr 5fr;
    gap: clamp(16px, 2vw, 32px);
}

.content-grid.reverse {
    grid-template-columns: 5fr 7fr;
}

/* === Animated Border Cards === */
.card-border-wrap {
    position: relative;
    border-radius: 8px;
    padding: 2px;
    background: conic-gradient(from var(--border-angle), #b48efa, #00d4ff, #e8a0b8, #b48efa);
    animation: rotate-border 3s linear infinite;
    animation-play-state: paused;
}

@keyframes rotate-border {
    to { --border-angle: 360deg; }
}

.card-border-wrap:hover,
.visible .card-border-wrap {
    animation-play-state: running;
}

.card-inner {
    background: var(--frosted-panel);
    border-radius: 6px;
    padding: clamp(24px, 3vw, 40px);
}

.card-label {
    font-family: 'Chakra Petch', sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--lcd-cyan);
    display: block;
    margin-bottom: 0.75rem;
}

.card-inner h2 {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background: var(--chrome-sweep);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: chrome-shimmer 6s ease infinite;
    margin-bottom: 1rem;
}

.card-inner p {
    color: var(--liquid-silver);
    line-height: 1.75;
}

/* Duotone card */
.duotone-card {
    padding: 0;
    overflow: hidden;
}

.duotone-card .card-label {
    padding: 16px 24px 16px;
}

.duotone-image svg {
    display: block;
    width: 100%;
    height: auto;
}

/* === Animate Entry === */
.animate-entry {
    opacity: 0;
    transition: transform 700ms cubic-bezier(0.16, 1, 0.3, 1), opacity 500ms ease;
}

.animate-entry.from-right {
    transform: translateX(60px);
}

.animate-entry.from-left {
    transform: translate(-40px, 40px);
}

.animate-entry.visible {
    opacity: 1;
    transform: translate(0, 0);
}

/* === Horizontal Scroll Strip === */
#scroll-strip {
    position: relative;
    padding: clamp(48px, 8vw, 100px) 0;
    z-index: 1;
}

.strip-title {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background: var(--chrome-sweep);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: chrome-shimmer 6s ease infinite;
    padding: 0 clamp(16px, 2vw, 32px);
    margin-bottom: 2rem;
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
}

.scroll-container {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    gap: 20px;
    padding: 0 clamp(16px, 2vw, 32px) 20px;
    mask-image: linear-gradient(to right, transparent 0%, black 5%, black 95%, transparent 100%);
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 5%, black 95%, transparent 100%);
}

.scroll-container::-webkit-scrollbar {
    height: 4px;
}

.scroll-container::-webkit-scrollbar-track {
    background: var(--frosted-panel);
}

.scroll-container::-webkit-scrollbar-thumb {
    background: var(--gunmetal);
    border-radius: 2px;
}

.scroll-card {
    flex: 0 0 320px;
    scroll-snap-align: start;
}

.scroll-card-inner {
    background: var(--frosted-panel);
    border-radius: 6px;
    padding: 32px 24px;
    min-height: 280px;
    display: flex;
    flex-direction: column;
}

.scroll-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 16px;
}

.scroll-label {
    font-family: 'Chakra Petch', sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--neon-lilac);
    margin-bottom: 12px;
}

.scroll-card-inner p {
    color: var(--liquid-silver);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* === Footer === */
#chrome-footer {
    position: relative;
    z-index: 1;
}

.footer-inner {
    background: linear-gradient(135deg, #b0b0b0 0%, #d0d0d0 25%, #a0a0a0 50%, #e8e8e8 75%, #c0c0c0 100%);
    padding: 24px clamp(16px, 2vw, 32px);
    border-top: 1px solid transparent;
    animation: header-border-cycle 4s linear infinite;
}

.footer-content {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-logo {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--midnight-chrome);
}

.footer-tagline {
    font-family: 'Noto Sans KR', sans-serif;
    font-weight: 300;
    font-size: 0.85rem;
    color: var(--gunmetal);
}

.footer-year {
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.8rem;
    color: var(--gunmetal);
}

.footer-reflection {
    height: 40px;
    background: linear-gradient(135deg, #b0b0b0 0%, #d0d0d0 25%, #a0a0a0 50%, #e8e8e8 75%, #c0c0c0 100%);
    transform: scaleY(-1);
    mask-image: linear-gradient(to bottom, rgba(0,0,0,0.3), transparent);
    -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,0.3), transparent);
}

/* === Responsive === */
@media (max-width: 768px) {
    .content-grid,
    .content-grid.reverse {
        grid-template-columns: 1fr;
    }

    .nav-dots {
        gap: 12px;
    }

    .footer-content {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
}