/* munju.im — Surreal Metallic Dream Interface */
/* Fonts: Inter" | Space Mono" | Syne (Google Fonts) */

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

:root {
    --silver-blue: #C0C8E0;
    --muted-blue-grey: #8090B0;
    --chrome-blue: #5060A0;
    --navy-deep: #0C1020;
    --panel-navy: #1A2038;
    --chrome-border: #8090A0;
    --dream-violet: #6050A0;
    --gradient-end: #141828;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background: var(--navy-deep);
    color: var(--muted-blue-grey);
    font-family: 'Inter', sans-serif;
    font-weight: 300;
    font-size: clamp(0.95rem, 1.2vw, 1.1rem);
    line-height: 1.85;
    overflow: hidden;
    width: 100vw;
    height: 100vh;
    position: relative;
}

/* ============================================
   Chrome Ambient Light
   ============================================ */

#chrome-ambient {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background:
        radial-gradient(ellipse 60% 40% at 25% 20%, rgba(96, 80, 160, 0.06) 0%, transparent 70%),
        radial-gradient(ellipse 50% 50% at 75% 70%, rgba(80, 96, 160, 0.05) 0%, transparent 60%),
        radial-gradient(ellipse 80% 30% at 50% 50%, rgba(128, 144, 160, 0.03) 0%, transparent 80%);
}

/* ============================================
   Dancheong Border Frames
   ============================================ */

.dancheong-border {
    position: fixed;
    left: 0;
    right: 0;
    height: 24px;
    z-index: 10;
    pointer-events: none;
    opacity: 0;
    transition: opacity 1.5s ease;
}

.dancheong-border.visible {
    opacity: 1;
}

#dancheong-top {
    top: 0;
}

#dancheong-bottom {
    bottom: 0;
}

.dancheong-border-v {
    position: fixed;
    top: 0;
    bottom: 0;
    width: 24px;
    z-index: 10;
    pointer-events: none;
    opacity: 0;
    transition: opacity 1.5s ease 0.3s;
}

.dancheong-border-v.visible {
    opacity: 1;
}

#dancheong-left {
    left: 0;
}

#dancheong-right {
    right: 0;
}

/* ============================================
   HUD Panel Base
   ============================================ */

.hud-panel {
    position: fixed;
    background: linear-gradient(180deg, var(--panel-navy), var(--gradient-end));
    border: 1px solid var(--chrome-border);
    z-index: 20;
    opacity: 0;
    padding: 20px 24px;
    overflow: hidden;
}

.hud-panel.entered {
    opacity: 1;
}

.hud-panel__chrome-edge {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--chrome-border) 20%,
        var(--silver-blue) 50%,
        var(--chrome-border) 80%,
        transparent 100%
    );
    opacity: 0.7;
}

.hud-panel__dancheong-accent {
    margin-top: 12px;
}

.hud-panel__dancheong-accent svg {
    width: 80px;
    height: 8px;
}

.hud-label {
    display: block;
    font-family: 'Space Mono', monospace;
    font-weight: 400;
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    color: var(--chrome-blue);
    text-transform: uppercase;
    margin-bottom: 10px;
    opacity: 0.8;
}

/* ============================================
   Panel: Top-Left (Identity)
   ============================================ */

.hud-panel--tl {
    top: 36px;
    left: 36px;
    width: clamp(200px, 22vw, 320px);
    transform: translateX(-40px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.hud-panel--tl.entered {
    transform: translateX(0);
}

.site-title {
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: 1;
    color: var(--silver-blue);
    letter-spacing: -0.02em;
    margin-top: 4px;
}

.title-glow {
    text-shadow:
        0 0 30px rgba(192, 200, 224, 0.3),
        0 0 60px rgba(96, 80, 160, 0.15);
}

.title-dot {
    color: var(--dream-violet);
    text-shadow: 0 0 20px rgba(96, 80, 160, 0.5);
}

.title-ext {
    font-weight: 400;
    color: var(--chrome-border);
    font-size: 0.7em;
}

/* ============================================
   Panel: Top-Right (Status)
   ============================================ */

.hud-panel--tr {
    top: 36px;
    right: 36px;
    width: clamp(180px, 18vw, 260px);
    transform: translateX(40px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.hud-panel--tr.entered {
    transform: translateX(0);
}

.status-grid {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.status-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding-bottom: 6px;
    border-bottom: 1px solid rgba(128, 144, 160, 0.12);
}

.status-key {
    font-family: 'Space Mono', monospace;
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    color: var(--chrome-blue);
    opacity: 0.7;
}

.status-val {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    color: var(--silver-blue);
}

.val-pulse {
    animation: val-pulse 3s ease-in-out infinite;
}

@keyframes val-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* ============================================
   Panel: Center-Left (Mixed Media)
   ============================================ */

.hud-panel--cl {
    top: 50%;
    left: 36px;
    transform: translateY(-50%) translateX(-50px);
    width: clamp(220px, 24vw, 340px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.hud-panel--cl.entered {
    transform: translateY(-50%) translateX(0);
}

.mixed-media-zone {
    position: relative;
    margin-top: 8px;
}

.mm-text-layer {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-bottom: -30px;
    padding-left: 8px;
}

.mm-korean {
    font-family: 'Syne', sans-serif;
    font-weight: 800;
    font-size: clamp(1.1rem, 2vw, 1.6rem);
    color: var(--silver-blue);
    letter-spacing: 0.08em;
    text-shadow: 0 0 20px rgba(192, 200, 224, 0.2);
}

.mm-roman {
    font-family: 'Space Mono', monospace;
    font-size: 0.55rem;
    letter-spacing: 0.3em;
    color: var(--chrome-blue);
    opacity: 0.6;
}

.mm-svg-layer {
    width: 100%;
    height: auto;
    display: block;
}

.mm-overlay-text {
    position: absolute;
    bottom: 14px;
    right: 12px;
    font-family: 'Space Mono', monospace;
    font-size: 0.5rem;
    letter-spacing: 0.25em;
    color: var(--dream-violet);
    opacity: 0.5;
}

/* ============================================
   Panel: Bottom-Right (Transmission)
   ============================================ */

.hud-panel--br {
    bottom: 36px;
    right: 36px;
    width: clamp(240px, 26vw, 380px);
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.hud-panel--br.entered {
    transform: translateY(0);
}

.transmission-feed {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.feed-line {
    font-family: 'Inter', sans-serif;
    font-weight: 300;
    font-size: clamp(0.75rem, 1vw, 0.9rem);
    line-height: 1.7;
    color: var(--muted-blue-grey);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    padding-left: 12px;
    border-left: 1px solid rgba(128, 144, 160, 0.15);
}

.feed-line.revealed {
    opacity: 0.85;
    transform: translateY(0);
}

/* ============================================
   Panel: Bottom-Left (Navigator)
   ============================================ */

.hud-panel--bl {
    bottom: 36px;
    left: 36px;
    width: clamp(170px, 16vw, 240px);
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.hud-panel--bl.entered {
    transform: translateY(0);
}

.nav-matrix {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.nav-node {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: default;
    transition: opacity 0.3s ease;
}

.nav-node:hover {
    opacity: 0.7;
}

.nav-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.nav-text {
    font-family: 'Space Mono', monospace;
    font-size: 0.6rem;
    letter-spacing: 0.2em;
    color: var(--chrome-border);
    transition: color 0.3s ease;
}

.nav-node:hover .nav-text {
    color: var(--silver-blue);
}

.nav-node.active .nav-text {
    color: var(--dream-violet);
}

/* ============================================
   Panel: Center (Breathing Typography)
   ============================================ */

.hud-panel--center {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: auto;
    max-width: 90vw;
    background: transparent;
    border: none;
    z-index: 15;
    padding: 0;
    text-align: center;
    transition: opacity 1.2s ease;
}

.breathing-text {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

.breath-word {
    font-family: 'Syne', sans-serif;
    font-size: clamp(2.5rem, 7vw, 6rem);
    line-height: 1.05;
    color: var(--silver-blue);
    letter-spacing: 0.08em;
    opacity: 0.12;
    transition: font-weight 0.8s ease, opacity 0.8s ease, text-shadow 0.8s ease;
    font-weight: 400;
}

.breath-word.active {
    font-weight: 800;
    opacity: 0.35;
    text-shadow:
        0 0 40px rgba(192, 200, 224, 0.15),
        0 0 80px rgba(96, 80, 160, 0.08);
}

.center-dancheong {
    margin-top: 20px;
    opacity: 0.5;
}

.center-dancheong svg {
    width: clamp(150px, 30vw, 300px);
    height: 12px;
}

/* ============================================
   Panel: Right-Center (Cultural Artifact)
   ============================================ */

.hud-panel--rc {
    top: 50%;
    right: 36px;
    transform: translateY(-50%) translateX(50px);
    width: clamp(140px, 14vw, 200px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.hud-panel--rc.entered {
    transform: translateY(-50%) translateX(0);
}

.artifact-zone {
    display: flex;
    justify-content: center;
    margin-top: 8px;
}

.artifact-svg {
    width: 100%;
    max-width: 160px;
    height: auto;
}

/* Chrome shimmer on artifact */
.artifact-svg rect,
.artifact-svg circle {
    transition: opacity 0.4s ease;
}

.hud-panel--rc:hover .artifact-svg rect,
.hud-panel--rc:hover .artifact-svg circle {
    filter: drop-shadow(0 0 3px rgba(192, 200, 224, 0.2));
}

/* ============================================
   Chrome Particles
   ============================================ */

#chrome-particles {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 5;
}

.chrome-particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--chrome-border);
    border-radius: 50%;
    opacity: 0;
    animation: particle-drift 8s ease-in-out infinite;
}

@keyframes particle-drift {
    0% {
        opacity: 0;
        transform: translateY(0) scale(1);
    }
    15% {
        opacity: 0.4;
    }
    50% {
        opacity: 0.2;
        transform: translateY(-30vh) scale(0.6);
    }
    85% {
        opacity: 0.1;
    }
    100% {
        opacity: 0;
        transform: translateY(-60vh) scale(0.3);
    }
}

/* ============================================
   Chrome Shimmer Animation (for borders)
   ============================================ */

@keyframes chrome-shimmer {
    0% {
        background-position: -200% center;
    }
    100% {
        background-position: 200% center;
    }
}

.hud-panel::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(128, 144, 176, 0.2) 30%,
        rgba(192, 200, 224, 0.4) 50%,
        rgba(128, 144, 176, 0.2) 70%,
        transparent 100%
    );
    background-size: 200% 100%;
    animation: chrome-shimmer 6s ease-in-out infinite;
}

.hud-panel--center::after {
    display: none;
}

/* ============================================
   Panel subtle metallic sheen
   ============================================ */

.hud-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(192, 200, 224, 0.03) 0%,
        transparent 40%,
        rgba(128, 144, 160, 0.02) 60%,
        transparent 100%
    );
    pointer-events: none;
}

.hud-panel--center::before {
    display: none;
}

/* ============================================
   Responsive adjustments
   ============================================ */

@media (max-width: 768px) {
    body {
        overflow-y: auto;
        overflow-x: hidden;
        height: auto;
        min-height: 100vh;
    }

    .hud-panel {
        position: relative;
        top: auto;
        left: auto;
        right: auto;
        bottom: auto;
        width: calc(100% - 48px) !important;
        max-width: none;
        margin: 12px 24px;
        transform: none !important;
    }

    .hud-panel.entered {
        transform: none !important;
    }

    .hud-panel--center {
        order: -1;
        margin-top: 48px;
        margin-bottom: 24px;
    }

    .hud-panel--cl {
        transform: none !important;
    }

    .hud-panel--rc {
        transform: none !important;
    }

    .dancheong-border,
    .dancheong-border-v {
        display: none;
    }

    .breath-word {
        font-size: clamp(2rem, 10vw, 3.5rem);
    }
}