/* ============================================================
   Corals as Kin — AR Experience
   styles.css
   ============================================================ */

/* ─── Custom properties ──────────────────────────────────── */
:root {
    --bg:           #0a0a0a;
    --surface:      #111111;
    --text:         #ffffff;
    --text-dim:     rgba(255, 255, 255, 0.6);
    --accent:       #39FF14;          /* Fluorescence green */
    --accent-teal:  #0F6E56;          /* Deep teal alt */
    --caption-bg:   rgba(0, 0, 0, 0.72);
    --ui-bg:        rgba(0, 0, 0, 0.55);

    --font:         -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;

    --radius-sm:    6px;
    --radius-md:    12px;
    --radius-lg:    20px;

    --transition-fast:  0.15s ease;
    --transition-mid:   0.3s ease;
    --transition-slow:  0.5s ease;

    /* Stage transition duration (also read by JS: TRANSITION_MS) */
    --stage-fade-ms:    300;
}

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

html, body {
    height: 100%;
    overflow: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }

button {
    background: none;
    border: none;
    cursor: pointer;
    color: inherit;
    font-family: inherit;
}

/* ============================================================
   LANDING PAGE  (body.landing)
   ============================================================ */

body.landing {
    overflow-y: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100dvh;       /* dynamic viewport height — avoids mobile browser chrome */
    padding: env(safe-area-inset-top) env(safe-area-inset-right)
             env(safe-area-inset-bottom) env(safe-area-inset-left);
}

/* Animated background — subtle radial glow */
body.landing::before {
    content: "";
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% 0%, rgba(57, 255, 20, 0.06) 0%, transparent 70%),
        radial-gradient(ellipse 60% 60% at 80% 100%, rgba(15, 110, 86, 0.08) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
}

.landing-container {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 400px;
    padding: 48px 28px 40px;
    display: flex;
    flex-direction: column;
    gap: 40px;
    align-items: center;
    text-align: center;
}

/* Header */
.landing-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.logo-mark svg {
    display: block;
}

.landing-subtitle {
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-dim);
}

/* Hero */
.landing-hero {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.landing-title {
    font-size: clamp(52px, 16vw, 80px);
    font-weight: 700;
    line-height: 0.95;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #ffffff 30%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.landing-tagline {
    font-size: 15px;
    line-height: 1.5;
    color: var(--text-dim);
    max-width: 260px;
    margin: 0 auto;
}

/* CTA */
.landing-action {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    width: 100%;
}

.btn-start {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--accent);
    color: #000;
    font-size: 16px;
    font-weight: 600;
    padding: 16px 32px;
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 280px;
    justify-content: center;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.btn-start:active {
    opacity: 0.85;
    transform: scale(0.97);
}

.landing-hint {
    font-size: 13px;
    color: var(--text-dim);
}

/* Stage preview strip */
.landing-stages {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.stage-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.stage-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 1.5px solid rgba(255, 255, 255, 0.35);
    background: transparent;
    transition: background var(--transition-mid), border-color var(--transition-mid);
}

.stage-dot.filled {
    background: var(--accent);
    border-color: var(--accent);
}

.stage-label {
    font-size: 10px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.stage-divider {
    color: var(--text-dim);
    font-size: 12px;
    margin-bottom: 14px;
    opacity: 0.4;
}

/* Desktop warning */
.desktop-warning {
    position: fixed;
    inset: 0;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 24px;
    z-index: 100;
}

.desktop-warning-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    max-width: 380px;
    text-align: center;
}

.desktop-warning-inner h2 {
    font-size: 22px;
    font-weight: 600;
}

.desktop-warning-inner p {
    font-size: 15px;
    color: var(--text-dim);
    line-height: 1.5;
}

.qr-placeholder {
    margin-top: 8px;
    background: #fff;
    padding: 12px;
    border-radius: var(--radius-md);
    line-height: 0;
}

.qr-placeholder img {
    display: block;
    border-radius: 4px;
}

.qr-url {
    font-size: 11px;
    color: #333;
    word-break: break-all;
    line-height: 1.4;
    padding: 8px;
}

.qr-caption {
    font-size: 12px;
    color: var(--text-dim);
    margin-top: -8px;
}

/* ============================================================
   AR PAGE  (body.ar-page)
   ============================================================ */

body.ar-page {
    background: #000;
    overflow: hidden;
    position: fixed;
    inset: 0;
}

/* A-Frame canvas fills viewport */
a-scene {
    position: fixed !important;
    inset: 0 !important;
    width: 100% !important;
    height: 100% !important;
    z-index: 1;
}

/* ─── Scanning overlay ───────────────────────────────────── */
.scanning-overlay {
    position: fixed;
    inset: 0;
    z-index: 20;
    background: rgba(0, 0, 0, 0.75);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    transition: opacity var(--transition-slow);
}

.scanning-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.scanning-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 36px;
}

/* Viewfinder */
.viewfinder {
    position: relative;
    width: min(240px, 62vw);
    height: min(240px, 62vw);
    overflow: hidden;
}

.vf-corner {
    position: absolute;
    width: 28px;
    height: 28px;
    border-color: var(--accent);
    border-style: solid;
    border-width: 0;
}

.vf-tl { top: 0; left: 0;  border-top-width: 2.5px; border-left-width: 2.5px;  border-top-left-radius: 3px; }
.vf-tr { top: 0; right: 0; border-top-width: 2.5px; border-right-width: 2.5px; border-top-right-radius: 3px; }
.vf-bl { bottom: 0; left: 0;  border-bottom-width: 2.5px; border-left-width: 2.5px;  border-bottom-left-radius: 3px; }
.vf-br { bottom: 0; right: 0; border-bottom-width: 2.5px; border-right-width: 2.5px; border-bottom-right-radius: 3px; }

/* Scan line animation */
.vf-scan-line {
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    animation: scan-line 2s ease-in-out infinite;
    box-shadow: 0 0 8px var(--accent);
}

@keyframes scan-line {
    0%   { top: 0%;   opacity: 0; }
    10%  { opacity: 1; }
    90%  { opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

/* Scanning text */
.scanning-text {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.scanning-instruction {
    font-size: 16px;
    font-weight: 500;
    line-height: 1.4;
    color: var(--text);
}

.scanning-instruction strong {
    color: var(--accent);
    font-weight: 700;
}

.scanning-sub {
    font-size: 13px;
    color: var(--text-dim);
    transition: color var(--transition-mid);
}

.scanning-sub.ready {
    color: var(--accent);
}

/* Back button */
.btn-back {
    position: absolute;
    top: max(16px, env(safe-area-inset-top));
    left: 16px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dim);
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    background: var(--ui-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: color var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
    z-index: 30;
}

.btn-back:active { color: var(--text); }

/* ─── AR UI overlay ──────────────────────────────────────── */
.ui-overlay {
    position: fixed;
    inset: 0;
    z-index: 10;
    pointer-events: none;     /* passes taps through to stage manager */
    opacity: 0;
    transition: opacity var(--transition-mid);
    /* Safe area padding */
    padding:
        max(16px, env(safe-area-inset-top))
        max(16px, env(safe-area-inset-right))
        max(16px, env(safe-area-inset-bottom))
        max(16px, env(safe-area-inset-left));
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.ui-overlay.active {
    opacity: 1;
}

/* Top bar */
.ui-top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Stage indicator dots */
.stage-indicators {
    display: flex;
    gap: 8px;
    align-items: center;
    background: var(--ui-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 8px 14px;
    border-radius: 100px;
}

.stage-indicators .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: 1.5px solid rgba(255, 255, 255, 0.35);
    background: transparent;
    transition: background var(--transition-mid), border-color var(--transition-mid),
                transform var(--transition-mid);
}

.stage-indicators .dot.active {
    background: var(--accent);
    border-color: var(--accent);
    transform: scale(1.25);
    box-shadow: 0 0 6px var(--accent);
}

/* Mute button */
.btn-mute {
    pointer-events: all;           /* this button IS interactive */
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--ui-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dim);
    transition: color var(--transition-fast), background var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.btn-mute:active { background: rgba(0,0,0,0.8); color: var(--text); }
.btn-mute.unmuted { color: var(--accent); }

/* Tap-to-continue prompt */
.tap-prompt {
    position: absolute;
    bottom: 90px;          /* sits above caption bar */
    left: 50%;
    transform: translateX(-50%);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
    background: var(--ui-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 8px 16px;
    border-radius: 100px;
    opacity: 0;
    transition: opacity var(--transition-mid);
    animation: none;
    white-space: nowrap;
}

.tap-prompt.visible {
    opacity: 1;
    animation: pulse-opacity 2s ease-in-out infinite;
}

@keyframes pulse-opacity {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.5; }
}

/* Caption bar */
.caption-bar {
    background: var(--caption-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    opacity: 1;
    transition: opacity var(--transition-mid);
}

.caption-bar.fading {
    opacity: 0;
}

.caption-stage-label {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
}

.caption-text {
    font-size: 13px;
    line-height: 1.5;
    color: var(--text);
}

/* ─── Stage transition overlay ───────────────────────────── */
.transition-overlay {
    position: fixed;
    inset: 0;
    z-index: 15;
    background: #000;
    opacity: 0;
    pointer-events: none;
    transition: opacity calc(var(--stage-fade-ms) * 1ms) ease;
}

.transition-overlay.fading-out {
    opacity: 1;
    pointer-events: all;   /* block taps during transition */
}

/* ─── Loading screen (A-Frame default, kept minimal) ─────── */
/* Hide A-Frame's own loading UI since MindAR has its own */
.a-loader-title { display: none !important; }
.a-orientation-modal { display: none !important; }

/* ─── Responsive tweaks ──────────────────────────────────── */
@media (max-width: 360px) {
    .landing-title   { font-size: 46px; }
    .scanning-instruction { font-size: 14px; }
    .caption-text    { font-size: 12px; }
}