/* ==========================================================================
   QuietJoon // Cultural Cartographer's Dashboard
   Palette: Translucent Frost
   Aesthetic: sci-fi · diagonal-sections · tech-mono · warm-inviting
   ========================================================================== */

:root {
    --frost-white: #F0F4F8;
    --ice-blue: #D8E8F0;
    --glacier: #B8D0E0;
    --command-cyan: #4DA8DA;
    --signal-green: #5AC8A8;
    --data-gray: #4A5568;
    --deep-navy: #1A2A3A;
    --dossier-tint: #E2EEF6;

    --skew-top: 3vh;
    --skew-zero: 0vh;

    --font-mono: "Share Tech Mono", "Courier New", monospace;
    --font-sans: "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-serif: "Noto Serif KR", "Times New Roman", serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--data-gray);
    background:
        linear-gradient(180deg, var(--frost-white) 0%, var(--ice-blue) 50%, var(--glacier) 100%);
    background-attachment: fixed;
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Subtle frost noise overlay (CSS only, no images) */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse at 20% 10%, rgba(77, 168, 218, 0.08), transparent 45%),
        radial-gradient(ellipse at 80% 90%, rgba(90, 200, 168, 0.06), transparent 40%),
        repeating-linear-gradient(
            45deg,
            rgba(255, 255, 255, 0.02) 0px,
            rgba(255, 255, 255, 0.02) 1px,
            transparent 1px,
            transparent 3px
        );
    z-index: 0;
}

/* ==========================================================================
   PERSISTENT HUD FRAME
   ========================================================================== */
.hud-frame {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 10;
}

.hud-corner {
    position: absolute;
    width: 96px;
    height: 96px;
    opacity: 0.55;
}

.hud-corner--tl { top: 18px; left: 18px; }
.hud-corner--tr { top: 18px; right: 18px; transform: scaleX(1); }
.hud-corner--bl { bottom: 18px; left: 18px; }
.hud-corner--br { bottom: 18px; right: 18px; }

.hud-line {
    stroke-dasharray: 200;
    stroke-dashoffset: 200;
    animation: hudDraw 1.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.hud-corner--tl .hud-line { animation-delay: 0.3s; }
.hud-corner--tr .hud-line { animation-delay: 0.4s; }
.hud-corner--bl .hud-line { animation-delay: 0.5s; }
.hud-corner--br .hud-line { animation-delay: 0.6s; }

@keyframes hudDraw {
    to { stroke-dashoffset: 0; }
}

.hud-glyph-text {
    font-family: var(--font-serif);
    font-size: 16px;
    opacity: 0;
    animation: hudFadeIn 0.6s ease forwards;
    animation-delay: 1.2s;
}

@keyframes hudFadeIn {
    to { opacity: 0.85; }
}

.hud-readout {
    position: absolute;
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    color: var(--command-cyan);
    opacity: 0;
    animation: hudFadeIn 0.6s ease forwards;
    animation-delay: 1.0s;
}

.hud-readout--left { top: 50%; left: 22px; transform: translateY(-50%); writing-mode: vertical-rl; }
.hud-readout--right { top: 50%; right: 22px; transform: translateY(-50%); writing-mode: vertical-rl; }

.hud-readout__label {
    color: var(--data-gray);
    opacity: 0.7;
}

.hud-readout__divider {
    color: var(--glacier);
}

/* ==========================================================================
   IDENTIFICATION SCREEN
   ========================================================================== */
.screen {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 90px;
    z-index: 1;
}

.screen--id {
    background:
        radial-gradient(ellipse at 50% 30%, rgba(255, 255, 255, 0.6) 0%, transparent 60%),
        linear-gradient(160deg, #FFFFFF 0%, var(--frost-white) 40%, var(--ice-blue) 100%);
    backdrop-filter: blur(8px);
}

.screen__inner {
    width: 100%;
    max-width: 1100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 48px;
}

.id-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    width: 100%;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--command-cyan);
    text-transform: uppercase;
    opacity: 0;
    animation: hudFadeIn 0.6s ease forwards;
    animation-delay: 1.4s;
}

.id-meta__chip {
    flex-shrink: 0;
}

.id-meta__divider {
    flex: 1;
    color: var(--glacier);
    overflow: hidden;
    white-space: nowrap;
}

.id-frame {
    position: relative;
    width: 100%;
    max-width: 880px;
    padding: 64px clamp(28px, 5vw, 80px);
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(77, 168, 218, 0.25);
    text-align: center;
}

.id-frame__corner {
    position: absolute;
    width: 14px;
    height: 14px;
    border: 1.5px solid var(--command-cyan);
}

.id-frame__corner--tl { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.id-frame__corner--tr { top: -1px; right: -1px; border-left: none; border-bottom: none; }
.id-frame__corner--bl { bottom: -1px; left: -1px; border-right: none; border-top: none; }
.id-frame__corner--br { bottom: -1px; right: -1px; border-left: none; border-top: none; }

.id-frame__bilingual {
    display: flex;
    justify-content: center;
    align-items: baseline;
    gap: 18px;
    font-family: var(--font-serif);
    font-size: clamp(14px, 1.4vw, 17px);
    color: var(--command-cyan);
    letter-spacing: 0.08em;
    margin-bottom: 22px;
    opacity: 0;
    animation: hudFadeIn 0.5s ease forwards;
    animation-delay: 0.7s;
}

.id-frame__hangul,
.id-frame__kanji {
    padding: 4px 10px;
    border: 1px solid rgba(77, 168, 218, 0.4);
}

.id-name {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: clamp(36px, 6vw, 72px);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--deep-navy);
    margin-bottom: 22px;
    min-height: 1.1em;
}

.id-name__cursor {
    display: inline-block;
    color: var(--command-cyan);
    animation: cursorBlink 0.9s steps(1) infinite;
    margin-left: 4px;
}

@keyframes cursorBlink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.id-tagline {
    font-family: var(--font-serif);
    font-size: clamp(15px, 1.6vw, 18px);
    color: var(--data-gray);
    line-height: 1.7;
    max-width: 640px;
    margin: 0 auto 28px;
    position: relative;
    opacity: 0;
}

.id-tagline.is-revealed { opacity: 1; }

.id-tagline::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -10px;
    width: 0;
    height: 1.5px;
    background: var(--command-cyan);
    transform: translateX(-50%);
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.id-tagline.is-revealed::after { width: 280px; }

.id-roles {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--command-cyan);
    margin-top: 8px;
    opacity: 0;
    animation: hudFadeIn 0.5s ease forwards;
    animation-delay: 2.4s;
}

.id-role__sep {
    color: var(--glacier);
}

/* ==========================================================================
   DIAGONAL BANDS (sections 2-4)
   ========================================================================== */
.band {
    position: relative;
    z-index: 1;
    padding: clamp(80px, 10vh, 160px) 90px;
    margin-top: -1px;
}

.band--ice {
    background:
        linear-gradient(180deg, var(--ice-blue) 0%, var(--dossier-tint) 100%);
    clip-path: polygon(0 3vh, 100% 0, 100% calc(100% - 3vh), 0 100%);
    margin-top: -3vh;
    padding-top: calc(clamp(80px, 10vh, 160px) + 3vh);
    padding-bottom: calc(clamp(80px, 10vh, 160px) + 3vh);
}

.band--glacier {
    background:
        linear-gradient(180deg, var(--glacier) 0%, #C6D8E6 100%);
    clip-path: polygon(0 0, 100% 3vh, 100% 100%, 0 calc(100% - 3vh));
    margin-top: -3vh;
    padding-top: calc(clamp(80px, 10vh, 160px) + 3vh);
    padding-bottom: calc(clamp(80px, 10vh, 160px) + 3vh);
}

.band__inner {
    max-width: 1180px;
    margin: 0 auto;
}

.band__header {
    display: flex;
    align-items: center;
    gap: 22px;
    margin-bottom: 56px;
}

.band__index {
    font-family: var(--font-mono);
    font-size: clamp(22px, 3vw, 32px);
    color: var(--command-cyan);
    letter-spacing: 0.1em;
    padding: 4px 12px;
    border: 1px solid rgba(77, 168, 218, 0.5);
    flex-shrink: 0;
}

.band__title {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: clamp(20px, 2.6vw, 28px);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--deep-navy);
}

.band__rule {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--command-cyan), transparent);
    opacity: 0.55;
}

.band__lede {
    font-family: var(--font-serif);
    font-size: clamp(15px, 1.5vw, 17px);
    line-height: 1.8;
    color: var(--data-gray);
    max-width: 720px;
    margin-bottom: 48px;
}

/* ==========================================================================
   DOSSIER GRID (Section 2)
   ========================================================================== */
.dossier-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.dossier-card {
    position: relative;
    padding: 28px 26px;
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(8px);
    border-left: 2px solid var(--command-cyan);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), background 0.35s ease;
}

.dossier-card::before {
    content: "";
    position: absolute;
    top: 8px;
    right: 8px;
    width: 6px;
    height: 6px;
    background: var(--signal-green);
    box-shadow: 0 0 0 3px rgba(90, 200, 168, 0.18);
}

.dossier-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.78);
}

.dossier-card__label {
    display: block;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.16em;
    color: var(--command-cyan);
    text-transform: uppercase;
    margin-bottom: 12px;
}

.dossier-card__value {
    font-family: var(--font-mono);
    font-size: clamp(17px, 1.8vw, 22px);
    color: var(--deep-navy);
    margin-bottom: 14px;
    letter-spacing: 0.04em;
}

.dossier-card__note {
    font-family: var(--font-sans);
    font-size: 14.5px;
    line-height: 1.7;
    color: var(--data-gray);
}

.dossier-card__note.serif-kr {
    font-family: var(--font-serif);
    font-style: italic;
}

/* ==========================================================================
   CULTURAL MAP (Section 3)
   ========================================================================== */
.cmap-wrap {
    display: grid;
    grid-template-columns: 1fr;
    gap: 36px;
    align-items: start;
    background: rgba(240, 244, 248, 0.55);
    border: 1px solid rgba(77, 168, 218, 0.3);
    padding: 28px;
}

@media (min-width: 980px) {
    .cmap-wrap {
        grid-template-columns: minmax(0, 2.4fr) minmax(280px, 1fr);
    }
}

.cmap {
    width: 100%;
    height: auto;
    display: block;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.4), rgba(216, 232, 240, 0.4));
}

.cmap-edge {
    transition: opacity 0.35s ease, stroke-width 0.35s ease;
}

.cmap-edge.is-active {
    opacity: 1;
    stroke-width: 1.4;
}

.cmap-edge.is-dim {
    opacity: 0.12;
}

.cmap-node {
    cursor: pointer;
}

.cmap-node__ring {
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), stroke 0.35s ease, stroke-width 0.35s ease;
    transform-origin: center;
    transform-box: fill-box;
}

.cmap-node__halo {
    transition: opacity 0.35s ease, r 0.35s ease;
    transform-origin: center;
    transform-box: fill-box;
}

.cmap-node__glyph {
    font-family: var(--font-serif);
    font-size: 18px;
    fill: var(--deep-navy);
    pointer-events: none;
    transition: fill 0.35s ease;
}

.cmap-node[data-id="design"] .cmap-node__glyph,
.cmap-node[data-id="code"] .cmap-node__glyph,
.cmap-node[data-id="systems"] .cmap-node__glyph {
    font-family: var(--font-mono);
    font-size: 14px;
}

.cmap-node.is-active .cmap-node__halo { opacity: 0.18; }
.cmap-node.is-active .cmap-node__ring {
    stroke-width: 2;
    stroke: var(--command-cyan);
}

.cmap-node.is-dim .cmap-node__ring { stroke-opacity: 0.4; }
.cmap-node.is-dim .cmap-node__glyph { fill: var(--data-gray); opacity: 0.5; }

.cmap-tooltip {
    background: rgba(26, 42, 58, 0.92);
    color: var(--frost-white);
    padding: 20px 22px;
    border-left: 2px solid var(--command-cyan);
    min-height: 160px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.cmap-tooltip__label {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.16em;
    color: var(--command-cyan);
    text-transform: uppercase;
}

.cmap-tooltip__detail {
    font-family: var(--font-serif);
    font-size: 15px;
    line-height: 1.7;
    color: var(--frost-white);
}

.cmap-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    margin-top: 24px;
    list-style: none;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--data-gray);
    text-transform: uppercase;
}

.cmap-legend li { display: flex; align-items: center; gap: 10px; }

.cmap-legend__dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 1.5px solid var(--command-cyan);
}

.cmap-legend__dot--cyan { background: var(--command-cyan); }
.cmap-legend__dot--green { background: var(--signal-green); border-color: var(--signal-green); }

.cmap-legend__line {
    width: 22px;
    height: 1.5px;
    background: var(--command-cyan);
}

/* ==========================================================================
   FIELD NOTES (Section 4)
   ========================================================================== */
.notes-list {
    list-style: none;
    display: grid;
    gap: 32px;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.note {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(8px);
    padding: 28px 28px 30px;
    border-top: 1px solid rgba(77, 168, 218, 0.4);
    position: relative;
    transition: background 0.35s ease, transform 0.35s ease;
}

.note::before {
    content: "";
    position: absolute;
    top: -1px;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--command-cyan);
}

.note:hover {
    background: rgba(255, 255, 255, 0.78);
    transform: translateY(-3px);
}

.note__meta {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--command-cyan);
    text-transform: uppercase;
    margin-bottom: 16px;
}

.note__tag {
    color: var(--signal-green);
}

.note__title {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: clamp(17px, 1.8vw, 21px);
    color: var(--deep-navy);
    letter-spacing: 0.04em;
    margin-bottom: 14px;
}

.note__hangul {
    font-family: var(--font-serif);
    color: var(--command-cyan);
    padding: 0 6px;
    border: 1px solid rgba(77, 168, 218, 0.45);
    margin: 0 2px;
}

.note__body {
    font-size: 14.5px;
    line-height: 1.75;
    color: var(--data-gray);
}

.note__body.serif-kr {
    font-family: var(--font-serif);
}

/* ==========================================================================
   TRANSMISSION FOOTER (Section 5)
   ========================================================================== */
.transmission {
    position: relative;
    z-index: 1;
    margin-top: -3vh;
    padding: calc(clamp(80px, 10vh, 140px) + 3vh) 90px clamp(60px, 8vh, 100px);
    background:
        linear-gradient(180deg, var(--deep-navy) 0%, #0F1A26 100%);
    color: var(--frost-white);
    clip-path: polygon(0 3vh, 100% 0, 100% 100%, 0 100%);
}

.transmission::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(
            0deg,
            rgba(77, 168, 218, 0.03) 0px,
            rgba(77, 168, 218, 0.03) 1px,
            transparent 1px,
            transparent 4px
        );
    pointer-events: none;
}

.transmission__inner {
    position: relative;
    max-width: 1100px;
    margin: 0 auto;
}

.transmission__header {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 48px;
    justify-content: center;
}

.transmission__signal {
    font-family: var(--font-mono);
    font-size: 14px;
    letter-spacing: 0.3em;
    color: var(--command-cyan);
    opacity: 0.7;
}

.transmission__title {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: clamp(20px, 2.4vw, 26px);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--frost-white);
}

.transmission__grid {
    display: grid;
    gap: 14px;
    max-width: 720px;
    margin: 0 auto 56px;
}

.transmission__row {
    display: grid;
    grid-template-columns: 130px 30px 1fr;
    align-items: baseline;
    font-family: var(--font-mono);
    font-size: 14px;
    letter-spacing: 0.06em;
    padding: 8px 0;
    border-bottom: 1px dashed rgba(77, 168, 218, 0.25);
}

.transmission__key {
    color: var(--command-cyan);
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.16em;
}

.transmission__sep {
    color: rgba(77, 168, 218, 0.5);
}

.transmission__value {
    color: var(--frost-white);
    word-break: break-word;
}

.link-underline {
    color: var(--frost-white);
    text-decoration: none;
    position: relative;
    padding-bottom: 2px;
    transition: color 0.3s ease;
}

.link-underline::after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--command-cyan);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.link-underline:hover {
    color: var(--command-cyan);
}

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

.transmission__sigil {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin: 48px 0 24px;
    font-family: var(--font-mono);
    font-size: 14px;
    letter-spacing: 0.18em;
    color: var(--command-cyan);
}

.transmission__sigil-glyph {
    font-family: var(--font-serif);
    font-size: 22px;
    padding: 6px 12px;
    border: 1px solid rgba(77, 168, 218, 0.45);
    color: var(--frost-white);
}

.transmission__sigil-rule {
    width: 90px;
    height: 1px;
    background: rgba(77, 168, 218, 0.4);
}

.transmission__copy {
    text-align: center;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.14em;
    color: rgba(216, 232, 240, 0.7);
    text-transform: uppercase;
}

.transmission__copy-sep {
    color: var(--command-cyan);
    margin: 0 8px;
}

/* ==========================================================================
   GENERIC LINK UNDERLINE (light backgrounds)
   ========================================================================== */
a.text-link,
.dossier-card a {
    color: var(--data-gray);
    text-decoration: none;
    position: relative;
    padding-bottom: 2px;
}

a.text-link::after,
.dossier-card a::after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--command-cyan);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

a.text-link:hover::after,
.dossier-card a:hover::after {
    width: 100%;
}

/* ==========================================================================
   REVEAL ANIMATIONS (band content fades in on scroll)
   ========================================================================== */
.band__header,
.dossier-card,
.note,
.cmap-wrap,
.band__lede {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.is-visible {
    opacity: 1 !important;
    transform: translateY(0) !important;
}

/* Stagger dossier cards & notes */
.dossier-card:nth-child(1) { transition-delay: 0.05s; }
.dossier-card:nth-child(2) { transition-delay: 0.15s; }
.dossier-card:nth-child(3) { transition-delay: 0.25s; }
.dossier-card:nth-child(4) { transition-delay: 0.35s; }

.note:nth-child(1) { transition-delay: 0.05s; }
.note:nth-child(2) { transition-delay: 0.15s; }
.note:nth-child(3) { transition-delay: 0.25s; }
.note:nth-child(4) { transition-delay: 0.35s; }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 880px) {
    .screen,
    .band,
    .transmission { padding-left: 28px; padding-right: 28px; }

    .hud-corner { width: 64px; height: 64px; }
    .hud-readout { display: none; }

    .id-meta {
        flex-wrap: wrap;
        font-size: 10px;
    }

    .id-frame { padding: 40px 22px; }

    .band__header { flex-wrap: wrap; gap: 14px; }

    .transmission__row { grid-template-columns: 110px 24px 1fr; font-size: 12.5px; }

    .transmission__sigil-rule { width: 40px; }
}

@media (max-width: 560px) {
    .id-frame__bilingual { font-size: 13px; gap: 10px; }
    .id-roles { font-size: 10.5px; gap: 8px; }
    .cmap-tooltip { min-height: auto; }
    .transmission__header { flex-direction: column; gap: 10px; }
}