/* ============================================================
   mang.quest - Network Topology Stylesheet
   Dark mode + warm sunset palette
   ============================================================ */

/* ---- CSS Variables (Color Palette) ---- */
:root {
    --color-primary-dark: #0D0D0D;
    --color-primary-light: #1A1714;
    --color-accent-gold: #E9C46A;
    --color-accent-orange-warm: #F4A261;
    --color-accent-coral: #E76F51;
    --color-neutral-tan: #B8A898;
    --color-neutral-cream: #F5F0E8;
    --color-purple-deep: #6D3B6D;

    --font-display: 'Archivo Black', sans-serif;
    --font-body: 'Work Sans', sans-serif;
    --font-accent: 'Lora', serif;

    --spacing-unit: 1rem;
    --spacing-lg: clamp(2rem, 8vw, 6rem);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-primary-dark);
    color: var(--color-neutral-cream);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* ---- Mesh Background (Animated Gradient) ---- */
.mesh-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.mesh-layer {
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    opacity: 0.08;
    mix-blend-mode: screen;
    animation: drift 60s ease-in-out infinite;
}

.mesh-1 {
    background: radial-gradient(circle at 20% 30%, var(--color-accent-coral) 0%, transparent 50%),
                radial-gradient(circle at 80% 70%, var(--color-accent-orange-warm) 0%, transparent 50%);
    animation-delay: 0s;
}

.mesh-2 {
    background: radial-gradient(circle at 40% 60%, var(--color-accent-gold) 0%, transparent 45%),
                radial-gradient(circle at 60% 20%, var(--color-neutral-tan) 0%, transparent 50%);
    animation-delay: -15s;
    animation-direction: reverse;
}

.mesh-3 {
    background: radial-gradient(circle at 30% 80%, var(--color-accent-coral) 0%, transparent 48%),
                radial-gradient(circle at 70% 40%, var(--color-accent-gold) 0%, transparent 52%);
    animation-delay: -30s;
}

@keyframes drift {
    0% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -50px) scale(1.05);
    }
    50% {
        transform: translate(-50px, 30px) scale(1.02);
    }
    75% {
        transform: translate(20px, 60px) scale(1.08);
    }
    100% {
        transform: translate(0, 0) scale(1);
    }
}

/* ---- Main Content Corridor ---- */
main.main-corridor {
    position: relative;
    z-index: 1;
    max-width: 720px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* ---- Hero Section ---- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-unit) * 2;
}

.korean-glyph {
    font-family: var(--font-display);
    font-size: clamp(8rem, 20vw, 16rem);
    color: var(--color-accent-orange-warm);
    font-weight: 400;
    letter-spacing: -0.03em;
    line-height: 0.95;
    text-transform: uppercase;
    text-shadow: 0 0 60px rgba(244, 162, 97, 0.4);
    margin-bottom: var(--spacing-unit) * 2;
    animation: glyph-pulse 8s ease-in-out infinite;
}

@keyframes glyph-pulse {
    0%, 100% {
        text-shadow: 0 0 60px rgba(244, 162, 97, 0.4);
        transform: scale(1);
    }
    50% {
        text-shadow: 0 0 100px rgba(244, 162, 97, 0.6);
        transform: scale(1.02);
    }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 5rem);
    color: var(--color-accent-gold);
    font-weight: 400;
    letter-spacing: -0.03em;
    line-height: 0.95;
    text-transform: uppercase;
    margin-bottom: var(--spacing-unit);
}

.hero-subtitle {
    font-family: var(--font-accent);
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    color: var(--color-neutral-tan);
    font-weight: 400;
    font-style: italic;
    max-width: 500px;
    line-height: 1.8;
    margin-top: var(--spacing-unit) * 2;
}

.scroll-indicator {
    position: absolute;
    bottom: clamp(2rem, 5vw, 4rem);
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-accent-gold);
    animation: scroll-bounce 2s ease-in-out infinite;
    cursor: pointer;
}

@keyframes scroll-bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
    50% {
        transform: translateX(-50%) translateY(8px);
        opacity: 0.6;
    }
}

/* ---- Section Styles ---- */
section {
    margin: clamp(6rem, 15vw, 10rem) 0;
    scroll-margin-top: var(--spacing-lg);
}

section h2 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 4rem);
    color: var(--color-accent-gold);
    font-weight: 400;
    letter-spacing: -0.03em;
    text-transform: uppercase;
    line-height: 0.95;
    margin-bottom: clamp(2rem, 4vw, 3rem);
}

section > p {
    font-size: clamp(1rem, 1.3vw, 1.1rem);
    line-height: 1.8;
    color: var(--color-neutral-cream);
    margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 400;
}

/* ---- Network Topology Section ---- */
.network-topology {
    padding: clamp(2rem, 4vw, 3rem) 0;
}

.topology-visual {
    width: 100%;
    max-width: 400px;
    margin: clamp(2rem, 5vw, 4rem) auto;
    aspect-ratio: 1;
}

.topology-visual svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 20px rgba(233, 196, 106, 0.15));
}

.node-center {
    animation: node-pulse 4s ease-in-out infinite;
}

.node-outer {
    animation: node-orbit 8s linear infinite;
    transform-origin: 200px 200px;
}

.node-edge {
    animation: node-orbit 12s linear infinite;
    transform-origin: 200px 200px;
    animation-direction: reverse;
}

@keyframes node-pulse {
    0%, 100% {
        r: 8px;
        fill: var(--color-accent-gold);
        filter: drop-shadow(0 0 15px rgba(233, 196, 106, 0.6));
    }
    50% {
        r: 12px;
        fill: var(--color-accent-orange-warm);
        filter: drop-shadow(0 0 30px rgba(244, 162, 97, 0.8));
    }
}

@keyframes node-orbit {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.connection-line {
    stroke-dasharray: 100;
    stroke-dashoffset: 100;
    animation: flow 3s ease-in-out infinite;
}

@keyframes flow {
    0% {
        stroke-dashoffset: 100;
    }
    50% {
        stroke-dashoffset: 0;
    }
    100% {
        stroke-dashoffset: -100;
    }
}

/* ---- Mesh Section ---- */
.mesh-section {
    padding: clamp(2rem, 4vw, 3rem) 0;
}

.feature-card {
    background: rgba(26, 23, 20, 0.6);
    border: 1px solid rgba(233, 196, 106, 0.2);
    border-radius: 8px;
    padding: clamp(1.5rem, 3vw, 2.5rem);
    margin: clamp(1.5rem, 3vw, 2.5rem) 0;
    backdrop-filter: blur(8px);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(244, 162, 97, 0.1), transparent);
    transition: left 0.5s ease;
}

.feature-card:hover {
    border-color: rgba(233, 196, 106, 0.4);
    background: rgba(26, 23, 20, 0.8);
    box-shadow: 0 0 30px rgba(233, 196, 106, 0.1);
}

.feature-card:hover::before {
    left: 100%;
}

.feature-card h3 {
    font-family: var(--font-display);
    font-size: clamp(1.3rem, 2.5vw, 1.8rem);
    color: var(--color-accent-orange-warm);
    font-weight: 400;
    letter-spacing: -0.02em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-unit);
}

.feature-card p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-neutral-cream);
}

/* ---- Core Section ---- */
.core-section {
    padding: clamp(2rem, 4vw, 3rem) 0;
    border-top: 1px solid rgba(233, 196, 106, 0.1);
    border-bottom: 1px solid rgba(233, 196, 106, 0.1);
    margin: clamp(4rem, 10vw, 8rem) 0;
}

.core-text {
    background: linear-gradient(135deg, rgba(233, 196, 106, 0.05) 0%, rgba(244, 162, 97, 0.05) 100%);
    padding: clamp(2rem, 4vw, 3rem);
    border-left: 3px solid var(--color-accent-gold);
    margin: clamp(2rem, 4vw, 3rem) 0;
}

.core-text p {
    margin-bottom: var(--spacing-unit) * 1.5;
    font-size: clamp(1rem, 1.2vw, 1.1rem);
    line-height: 1.9;
}

.core-text p:last-child {
    margin-bottom: 0;
}

/* ---- Reflection Section ---- */
.reflection-section {
    padding: clamp(2rem, 4vw, 3rem) 0;
    text-align: center;
}

.reflection-quote {
    font-family: var(--font-accent);
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--color-accent-gold);
    font-style: italic;
    font-weight: 600;
    margin: clamp(2.5rem, 5vw, 4rem) 0;
    line-height: 1.8;
    letter-spacing: 0.02em;
}

.footer-content {
    margin-top: clamp(3rem, 6vw, 5rem);
    padding-top: clamp(2rem, 4vw, 3rem);
    border-top: 1px solid rgba(233, 196, 106, 0.1);
}

.footer-text {
    font-family: var(--font-accent);
    font-size: clamp(0.9rem, 1.1vw, 1rem);
    color: var(--color-neutral-tan);
    font-style: italic;
    margin-bottom: var(--spacing-unit);
}

.footer-date {
    font-size: 0.9rem;
    color: var(--color-neutral-tan);
    opacity: 0.7;
}

/* ---- Scroll-based Animations ---- */
@media (prefers-reduced-motion: no-preference) {
    section > p {
        animation: fade-in-up 0.8s ease-out forwards;
        opacity: 0;
    }

    section > p:nth-of-type(1) { animation-delay: 0.1s; }
    section > p:nth-of-type(2) { animation-delay: 0.2s; }
    section > p:nth-of-type(3) { animation-delay: 0.3s; }
}

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

/* ---- Responsive Design ---- */
@media (max-width: 768px) {
    main.main-corridor {
        padding: clamp(1.5rem, 5vw, 2.5rem);
    }

    section {
        margin: clamp(4rem, 10vw, 6rem) 0;
    }

    .hero {
        min-height: 80vh;
    }

    .korean-glyph {
        margin-bottom: var(--spacing-unit);
    }

    .feature-card {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .korean-glyph {
        text-shadow: 0 0 30px rgba(244, 162, 97, 0.3);
    }

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

    .feature-card {
        padding: 1.25rem;
        margin: 1.25rem 0;
    }

    .reflection-quote {
        font-size: 1.25rem;
    }
}

/* ---- Miscellaneous ---- */
a {
    color: var(--color-accent-gold);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-accent-orange-warm);
    text-decoration: underline;
}

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

code {
    background: rgba(26, 23, 20, 0.8);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    color: var(--color-accent-gold);
    font-size: 0.9em;
}

/* Remove scrollbar styling preferences */
::-webkit-scrollbar {
    width: 8px;
}

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

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

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