/* ==========================================================================
   quietjoon.com - Cultural Cartographer's Dashboard
   Palette: Translucent Frost | Layout: Diagonal Sections | Aesthetic: Sci-Fi
   ========================================================================== */

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

:root {
    /* Palette */
    --frost-white: #F0F4F8;
    --ice-blue: #D8E8F0;
    --glacier: #B8D0E0;
    --command-cyan: #4DA8DA;
    --signal-green: #5AC8A8;
    --data-gray: #4A5568;
    --deep-navy: #1A2A3A;

    /* Typography */
    --font-mono: 'Share Tech Mono', monospace;
    --font-body: 'Noto Sans KR', sans-serif;
    --font-serif: 'Noto Serif KR', serif;

    /* Diagonal skew */
    --skew-amount: 5vh;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(15px, 1.5vw, 17px);
    line-height: 1.7;
    color: var(--data-gray);
    background-color: var(--frost-white);
    overflow-x: hidden;
}

/* --- Utility --- */
.signal-green {
    color: var(--signal-green);
}

.serif-kr {
    font-family: var(--font-serif);
    font-weight: 400;
    font-style: italic;
}

/* --- HUD Frame --- */
#hud-frame {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 100;
}

.hud-corner {
    position: absolute;
    width: 100px;
    height: 100px;
    opacity: 0;
}

.hud-corner path,
.hud-corner line,
.hud-corner circle {
    stroke-dasharray: 300;
    stroke-dashoffset: 300;
}

.hud-corner.animate path,
.hud-corner.animate line,
.hud-corner.animate circle {
    animation: hud-draw 1.2s ease-out forwards;
}

.hud-corner.animate {
    opacity: 0.5;
}

#hud-top-left { top: 10px; left: 10px; }
#hud-top-right { top: 10px; right: 10px; }
#hud-bottom-left { bottom: 10px; left: 10px; }
#hud-bottom-right { bottom: 10px; right: 10px; }

@keyframes hud-draw {
    to { stroke-dashoffset: 0; }
}

/* HUD Readouts */
.hud-readout {
    position: absolute;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--command-cyan);
    opacity: 0;
    transition: opacity 0.8s ease;
}

.hud-readout.visible {
    opacity: 0.5;
}

.hud-readout-top {
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    align-items: center;
}

.hud-readout-right {
    top: 50%;
    right: 20px;
    transform: translateY(-50%) rotate(90deg);
    transform-origin: right center;
    display: flex;
    gap: 8px;
    align-items: center;
}

.hud-glyph {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border: 1px solid var(--command-cyan);
    font-size: 11px;
    line-height: 1;
}

.hud-glyph-inline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border: 1px solid var(--command-cyan);
    color: var(--command-cyan);
    font-size: 12px;
    line-height: 1;
    font-family: var(--font-serif);
}

.hud-data {
    font-size: 10px;
}

.hud-separator {
    opacity: 0.4;
}

/* --- Identification Screen --- */
.section-identification {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(160deg, var(--frost-white) 0%, var(--ice-blue) 50%, var(--glacier) 100%);
    overflow: hidden;
}

.identification-content {
    text-align: center;
    z-index: 2;
    position: relative;
}

.identification-label {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--command-cyan);
    margin-bottom: 24px;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.identification-label.visible {
    opacity: 1;
}

.brand-name {
    font-family: var(--font-mono);
    font-size: clamp(32px, 5vw, 64px);
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--deep-navy);
    min-height: 1.2em;
    line-height: 1.2;
}

.brand-name .cursor {
    display: inline-block;
    width: 2px;
    height: 0.9em;
    background-color: var(--command-cyan);
    margin-left: 2px;
    animation: cursor-blink 0.8s step-end infinite;
    vertical-align: text-bottom;
}

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

.tagline-wrapper {
    position: relative;
    display: inline-block;
    margin-top: 16px;
}

.tagline {
    font-family: var(--font-body);
    font-size: clamp(14px, 1.5vw, 18px);
    font-weight: 400;
    color: var(--data-gray);
    letter-spacing: 0.05em;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.tagline.visible {
    opacity: 1;
}

.tagline-underline {
    display: block;
    height: 1.5px;
    background: var(--command-cyan);
    width: 0;
    margin-top: 6px;
    transition: width 0.5s ease;
}

.tagline-underline.animate {
    width: 100%;
}

.id-meta {
    margin-top: 32px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--data-gray);
    opacity: 0;
    transition: opacity 0.8s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.id-meta.visible {
    opacity: 0.7;
}

.id-meta-sep {
    color: var(--command-cyan);
    opacity: 0.5;
}

/* HUD Reticle */
.hud-reticle {
    position: absolute;
    width: 200px;
    height: 200px;
    bottom: 60px;
    right: 80px;
    opacity: 0;
    transition: opacity 1s ease;
    animation: reticle-rotate 30s linear infinite;
}

.hud-reticle.visible {
    opacity: 0.25;
}

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

/* --- Diagonal Section Base --- */
.diagonal-section {
    position: relative;
    padding: 0;
    margin-top: -1px;
}

.diagonal-section--a {
    background: var(--ice-blue);
    clip-path: polygon(0 0, 100% var(--skew-amount), 100% 100%, 0 calc(100% - var(--skew-amount)));
    padding: calc(var(--skew-amount) + 60px) 0 calc(var(--skew-amount) + 60px) 0;
}

.diagonal-section--b {
    background: var(--glacier);
    clip-path: polygon(0 var(--skew-amount), 100% 0, 100% calc(100% - var(--skew-amount)), 0 100%);
    padding: calc(var(--skew-amount) + 60px) 0 calc(var(--skew-amount) + 60px) 0;
    margin-top: calc(var(--skew-amount) * -1);
}

.diagonal-section--c {
    background: var(--ice-blue);
    clip-path: polygon(0 0, 100% var(--skew-amount), 100% 100%, 0 calc(100% - var(--skew-amount)));
    padding: calc(var(--skew-amount) + 60px) 0 calc(var(--skew-amount) + 60px) 0;
    margin-top: calc(var(--skew-amount) * -1);
}

.section-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 60px;
}

.section-label {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--command-cyan);
    margin-bottom: 12px;
    opacity: 0.7;
}

.section-heading {
    font-family: var(--font-mono);
    font-size: clamp(24px, 3.5vw, 44px);
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--deep-navy);
    margin-bottom: 24px;
}

.section-subtitle {
    font-family: var(--font-body);
    font-size: clamp(14px, 1.2vw, 16px);
    color: var(--data-gray);
    margin-bottom: 40px;
    opacity: 0.8;
}

/* --- About Section --- */
.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text p {
    margin-bottom: 16px;
}

.about-bilingual {
    font-size: 15px;
    opacity: 0.85;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 20px;
    border-left: 1px solid var(--command-cyan);
    padding-left: 24px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--command-cyan);
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 18px;
    color: var(--deep-navy);
}

/* --- Cultural Map Section --- */
.cultural-map-container {
    position: relative;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

.constellation-svg {
    width: 100%;
    height: auto;
}

.constellation-lines line {
    stroke: var(--command-cyan);
    stroke-width: 1;
    opacity: 0.25;
    transition: opacity 0.3s ease;
}

.constellation-lines line.highlight {
    opacity: 0.9;
    stroke-width: 1.5;
}

.node-ring {
    fill: none;
    stroke: var(--command-cyan);
    stroke-width: 1;
    opacity: 0.4;
    stroke-dasharray: 4 4;
    transition: opacity 0.3s ease, r 0.3s ease;
}

.node-bg {
    fill: var(--frost-white);
    stroke: var(--command-cyan);
    stroke-width: 1.5;
    transition: transform 0.3s ease;
}

.node-glyph {
    font-family: var(--font-serif);
    font-size: 16px;
    fill: var(--deep-navy);
    text-anchor: middle;
    pointer-events: none;
}

.constellation-node {
    cursor: pointer;
    transition: transform 0.3s ease;
}

.constellation-node:hover .node-ring,
.constellation-node.active .node-ring {
    opacity: 1;
}

.constellation-node:hover,
.constellation-node.active {
    transform: scale(1.15);
}

/* Tooltip */
.map-tooltip {
    position: absolute;
    background: var(--deep-navy);
    color: var(--frost-white);
    padding: 12px 18px;
    border: 1px solid var(--command-cyan);
    font-family: var(--font-mono);
    font-size: 12px;
    max-width: 260px;
    pointer-events: none;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.25s ease, transform 0.25s ease;
    z-index: 10;
}

.map-tooltip.visible {
    opacity: 1;
    transform: translateY(0);
}

.map-tooltip-label {
    font-size: 13px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--command-cyan);
    margin-bottom: 4px;
}

.map-tooltip-desc {
    font-family: var(--font-body);
    font-size: 13px;
    line-height: 1.5;
    opacity: 0.85;
}

/* --- Explorations Section --- */
.explorations-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.exploration-card {
    background: rgba(240, 244, 248, 0.6);
    border: 1px solid rgba(77, 168, 218, 0.2);
    padding: 32px;
    position: relative;
    transition: border-color 0.3s ease, background 0.3s ease;
}

.exploration-card:hover {
    border-color: var(--command-cyan);
    background: rgba(240, 244, 248, 0.9);
}

.card-icon {
    font-family: var(--font-mono);
    font-size: 20px;
    color: var(--command-cyan);
    margin-bottom: 16px;
}

.card-title {
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--deep-navy);
    margin-bottom: 12px;
}

.card-text {
    font-size: 14px;
    line-height: 1.7;
    color: var(--data-gray);
    opacity: 0.85;
}

/* --- Transmission Footer --- */
.transmission-footer {
    background: var(--deep-navy);
    color: var(--frost-white);
    padding: 60px 0 30px;
    margin-top: calc(var(--skew-amount) * -1);
    clip-path: polygon(0 var(--skew-amount), 100% 0, 100% 100%, 0 100%);
    padding-top: calc(var(--skew-amount) + 60px);
}

.transmission-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 60px;
}

.transmission-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(77, 168, 218, 0.3);
}

.transmission-label {
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--command-cyan);
}

.transmission-timestamp {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    color: var(--command-cyan);
    opacity: 0.6;
}

.transmission-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 50px;
}

.transmission-block-label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--command-cyan);
    margin-bottom: 16px;
}

.transmission-entry {
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 2;
    color: rgba(240, 244, 248, 0.7);
}

.transmission-link {
    display: block;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 2;
    color: rgba(240, 244, 248, 0.7);
    text-decoration: none;
    position: relative;
    transition: color 0.3s ease;
}

.transmission-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--command-cyan);
    transition: width 0.3s ease;
}

.transmission-link:hover {
    color: var(--frost-white);
}

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

.transmission-footer-bar {
    display: flex;
    align-items: center;
    gap: 16px;
    padding-top: 20px;
    border-top: 1px solid rgba(77, 168, 218, 0.15);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    color: rgba(240, 244, 248, 0.4);
}

.transmission-footer-bar .hud-glyph-inline {
    width: 18px;
    height: 18px;
    font-size: 10px;
    border-color: rgba(77, 168, 218, 0.3);
    color: rgba(77, 168, 218, 0.5);
}

/* --- Scroll-Reveal Animation --- */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-on-scroll.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    :root {
        --skew-amount: 3vh;
    }

    .section-inner {
        padding: 0 24px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .about-stats {
        border-left: none;
        border-top: 1px solid var(--command-cyan);
        padding-left: 0;
        padding-top: 20px;
    }

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

    .transmission-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .transmission-header {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }

    .hud-corner {
        width: 60px;
        height: 60px;
    }

    .hud-readout-right {
        display: none;
    }

    .hud-reticle {
        width: 120px;
        height: 120px;
        right: 20px;
        bottom: 30px;
    }

    .id-meta {
        flex-direction: column;
        gap: 6px;
    }

    .id-meta-sep {
        display: none;
    }

    .cultural-map-container {
        overflow-x: auto;
    }

    .constellation-svg {
        min-width: 600px;
    }

    .transmission-footer-bar {
        flex-wrap: wrap;
        gap: 8px;
    }
}