:root {
  --color-bg:         #070711;
  --color-surface:    #0d0d1f;
  --color-surface-2:  #141430;
  --color-border:     #1e1e4a;
  --color-accent:     #00ffcc;
  --color-accent-dim: #00ffcc44;
  --color-danger:     #ff4466;
  --color-warning:    #ffaa00;
  --color-text:       #e0e0ff;
  --color-muted:      #7070a0;
  --font-mono:        'Share Tech Mono', monospace;
  --font-body:        'Exo 2', sans-serif;
  --radius:           4px;
  --ease:             0.15s ease;
  --header-h:         60px;
  --footer-h:         48px;
  --ad-w:             320px;
  --gutter:           1.25rem;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body, #app { height: 100%; overflow: hidden; }
body { background: var(--color-bg); color: var(--color-text); font-family: var(--font-body); font-size: 16px; -webkit-font-smoothing: antialiased; }
a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { cursor: pointer; font-family: var(--font-body); }
input, select, textarea { font-family: var(--font-body); }

/* ── Shell ────────────────────────────────────────────────────────────────── */
#app          { display: flex; flex-direction: column; }
#app-body     { display: flex; flex: 1; overflow: hidden; min-height: 0; }
#app-main     { flex: 1; min-width: 0; overflow: hidden; position: relative; }
#app-ad-column{ width: var(--ad-w); flex-shrink: 0; display: flex; flex-direction: column; align-items: center; justify-content: flex-start; padding: 1rem 0.75rem; border-left: 1px solid var(--color-border); background: var(--color-surface); overflow: hidden; }
@media (max-width: 768px) { #app-ad-column { display: none; } }

/* ── Header ──────────────────────────────────────────────────────────────── */
#app-header { height: var(--header-h); background: var(--color-surface); border-bottom: 1px solid var(--color-border); flex-shrink: 0; }
.header-inner { display: flex; align-items: center; height: 100%; padding: 0 var(--gutter); gap: 1rem; }
.header-logo  { color: var(--color-accent); font-family: var(--font-mono); font-size: 1.4rem; letter-spacing: 0.25em; text-shadow: 0 0 16px var(--color-accent); text-decoration: none; flex-shrink: 0; }
.header-logo:hover { text-decoration: none; }
.header-right { display: flex; align-items: center; gap: 1.75rem; margin-left: auto; }
.header-nav   { display: flex; gap: 1.25rem; align-items: center; }
.header-nav a { color: var(--color-muted); font-size: 0.82rem; letter-spacing: 0.04em; text-transform: uppercase; transition: color var(--ease); }
.header-nav a:hover { color: var(--color-accent); text-decoration: none; }
@media (max-width: 640px) { .header-nav { display: none; } .header-right { gap: 0; } }
.header-auth  { display: flex; align-items: center; gap: 0.5rem; }

/* ── Footer ──────────────────────────────────────────────────────────────── */
#app-footer { height: var(--footer-h); background: var(--color-surface); border-top: 1px solid var(--color-border); flex-shrink: 0; }
.footer-inner { display: flex; align-items: center; height: 100%; padding: 0 var(--gutter); gap: 1.25rem; }
.footer-copy  { color: var(--color-muted); font-size: 0.75rem; flex-shrink: 0; }
.footer-links { display: flex; gap: 1.1rem; flex-wrap: wrap; }
.footer-link  { background: none; border: none; color: var(--color-muted); cursor: pointer; font-family: var(--font-body); font-size: 0.75rem; transition: color var(--ease); }
.footer-link:hover { color: var(--color-accent); }
.footer-version { color: var(--color-muted); font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.05em; margin-left: auto; flex-shrink: 0; }

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn { background: transparent; border: 1px solid var(--color-accent); border-radius: var(--radius); color: var(--color-accent); font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.06em; padding: 0.55rem 1.1rem; text-transform: uppercase; transition: background var(--ease), color var(--ease); }
.btn:hover { background: var(--color-accent); color: var(--color-bg); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary { background: var(--color-accent); color: var(--color-bg); }
.btn-primary:hover { background: transparent; color: var(--color-accent); }
.btn-ghost { border-color: var(--color-border); color: var(--color-muted); }
.btn-ghost:hover { border-color: var(--color-accent); color: var(--color-accent); background: transparent; }
.btn-danger { border-color: var(--color-danger); color: var(--color-danger); }
.btn-danger:hover { background: var(--color-danger); color: #fff; }
.btn-sm { font-size: 0.72rem; padding: 0.3rem 0.65rem; }

/* ── Form elements ────────────────────────────────────────────────────────── */
.input { width: 100%; background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius); color: var(--color-text); font-family: var(--font-body); font-size: 0.95rem; outline: none; padding: 0.65rem 0.9rem; transition: border-color var(--ease); }
.input:focus { border-color: var(--color-accent); }
.input[disabled] { opacity: 0.5; cursor: not-allowed; }
.field { display: flex; flex-direction: column; gap: 0.35rem; margin-bottom: 1rem; }
.label { color: var(--color-muted); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; }
.error-msg { color: var(--color-danger); font-size: 0.82rem; margin-top: 0.35rem; }
.success-msg { color: var(--color-accent); font-size: 0.82rem; margin-top: 0.35rem; }

/* ── Modal ────────────────────────────────────────────────────────────────── */
.modal-overlay { position: fixed; inset: 0; background: #00000099; display: flex; align-items: center; justify-content: center; z-index: 300; backdrop-filter: blur(6px); padding: 1rem; }
.modal-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 10px; box-shadow: 0 0 60px #00000080; max-width: 480px; padding: 2rem; position: relative; width: 100%; }
.modal-card.modal-sm { max-width: 360px; }
.modal-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 1.1rem; }
.modal-close { background: none; border: none; color: var(--color-muted); cursor: pointer; font-size: 1rem; position: absolute; right: 1rem; top: 1rem; transition: color var(--ease); }
.modal-close:hover { color: var(--color-text); }

/* ── Auth pages ───────────────────────────────────────────────────────────── */
.auth-bg { display: flex; align-items: center; justify-content: center; min-height: 100%; background: var(--color-bg); padding: 2rem; background-image: radial-gradient(ellipse at 20% 50%, #00ffcc08 0%, transparent 60%), radial-gradient(ellipse at 80% 20%, #ff446608 0%, transparent 60%); }
.auth-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 8px; box-shadow: 0 0 60px #00ffcc10; max-width: 400px; padding: 2.5rem; width: 100%; }
.auth-logo { color: var(--color-accent); display: block; font-family: var(--font-mono); font-size: 2rem; letter-spacing: 0.3em; margin-bottom: 0.25rem; text-align: center; text-shadow: 0 0 20px var(--color-accent); }
.auth-subtitle { color: var(--color-muted); font-size: 0.85rem; margin-bottom: 1.75rem; text-align: center; }
.auth-divider { align-items: center; color: var(--color-muted); display: flex; font-size: 0.75rem; gap: 1rem; margin: 1.1rem 0; text-transform: uppercase; }
.auth-divider::before, .auth-divider::after { background: var(--color-border); content: ''; flex: 1; height: 1px; }
.auth-link { color: var(--color-muted); font-size: 0.85rem; text-align: center; margin-top: 0.75rem; }

/* ── Game ─────────────────────────────────────────────────────────────────── */
#game-root { position: relative; width: 100%; height: 100%; background: var(--color-bg); overflow: hidden; }
#game-canvas { display: block; position: absolute; inset: 0; width: 100%; height: 100%; min-width: 1px; min-height: 1px; }
.game-hud { position: absolute; top: 0; left: 0; right: 0; align-items: center; background: var(--color-surface); border-bottom: 1px solid var(--color-border); display: flex; gap: 0.75rem; padding: 0.45rem 0.9rem; z-index: 10; }
.game-timer { color: var(--color-accent); font-family: var(--font-mono); font-size: 1.2rem; letter-spacing: 0.06em; text-shadow: 0 0 10px var(--color-accent); min-width: 85px; }
.game-timer.danger { color: var(--color-danger); text-shadow: 0 0 10px var(--color-danger); animation: pulse 0.8s ease-in-out infinite; }
@keyframes pulse { 0%,100%{opacity:1}50%{opacity:0.55} }
.game-timer-label { color: var(--color-muted); font-size: 0.68rem; letter-spacing: 0.05em; text-transform: uppercase; }
.game-hud-right { display: flex; align-items: center; gap: 0.65rem; margin-left: auto; }
.game-seed { color: var(--color-muted); font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.06em; }
.game-seed span { color: var(--color-text); }
.game-hint { position: absolute; bottom: 0; left: 0; right: 0; background: var(--color-surface); border-top: 1px solid var(--color-border); color: var(--color-muted); font-size: 0.68rem; letter-spacing: 0.04em; padding: 0.3rem 0.9rem; text-align: center; text-transform: uppercase; z-index: 10; }
.game-overlay { position: absolute; inset: 0; background: #07071199; backdrop-filter: blur(8px); display: flex; align-items: center; justify-content: center; padding: 2rem; z-index: 20; overflow-y: auto; }
.game-config-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 8px; max-width: 440px; padding: 1.75rem; width: 100%; }
.game-config-title { color: var(--color-accent); font-family: var(--font-mono); font-size: 1.2rem; letter-spacing: 0.15em; margin-bottom: 1.35rem; text-transform: uppercase; }
.game-field { display: flex; flex-direction: column; gap: 0.45rem; margin-bottom: 1.1rem; }
.game-field label { color: var(--color-muted); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; }
.algo-grid { display: grid; gap: 0.45rem; grid-template-columns: 1fr 1fr; }
.algo-btn { background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: 6px; color: var(--color-text); cursor: pointer; display: flex; flex-direction: column; gap: 0.15rem; padding: 0.65rem; text-align: left; transition: border-color var(--ease), background var(--ease); }
.algo-btn:hover { border-color: var(--color-accent); }
.algo-btn.active { background: var(--color-accent-dim); border-color: var(--color-accent); }
.algo-name { font-size: 0.82rem; font-weight: 600; }
.algo-desc { color: var(--color-muted); font-size: 0.7rem; }
.size-grid { display: grid; gap: 0.45rem; grid-template-columns: repeat(4,1fr); }
.size-btn { background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: 6px; color: var(--color-text); cursor: pointer; display: flex; flex-direction: column; align-items: center; gap: 0.1rem; padding: 0.5rem 0.25rem; font-size: 0.75rem; font-weight: 600; transition: border-color var(--ease); }
.size-btn span { color: var(--color-muted); font-size: 0.65rem; font-weight: 400; }
.size-btn:hover { border-color: var(--color-accent); }
.size-btn.active { background: var(--color-accent-dim); border-color: var(--color-accent); }
.seed-row { display: flex; gap: 0.45rem; }
.seed-hint { color: var(--color-muted); font-size: 0.7rem; }
.config-actions { display: flex; gap: 0.65rem; margin-top: 0.5rem; }
.config-actions .btn:first-child { flex: 1; }
.complete-overlay { position: absolute; inset: 0; background: #00000088; display: flex; align-items: center; justify-content: center; z-index: 30; backdrop-filter: blur(4px); }
.complete-card { background: var(--color-surface); border: 1px solid var(--color-accent); border-radius: 8px; box-shadow: 0 0 60px var(--color-accent-dim); padding: 2.25rem; text-align: center; max-width: 360px; width: 90%; }
.complete-title { color: var(--color-accent); font-family: var(--font-mono); font-size: 1.25rem; letter-spacing: 0.15em; margin-bottom: 0.65rem; text-transform: uppercase; }
.complete-time { color: var(--color-text); font-family: var(--font-mono); font-size: 2rem; margin-bottom: 1.5rem; }
.complete-actions { display: flex; flex-direction: column; gap: 0.6rem; }

/* ── Player pill ──────────────────────────────────────────────────────────── */
.pill-wrap { position: relative; }
.pill { align-items: center; background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: 999px; cursor: pointer; display: flex; gap: 0.45rem; padding: 0.25rem 0.65rem 0.25rem 0.25rem; transition: border-color var(--ease); }
.pill:hover { border-color: var(--color-accent); }
.pill-avatar { align-items: center; background: var(--color-accent); border-radius: 50%; color: var(--color-bg); display: flex; font-family: var(--font-mono); font-size: 0.68rem; font-weight: 700; height: 26px; justify-content: center; width: 26px; flex-shrink: 0; }
.pill-name { color: var(--color-text); font-size: 0.82rem; font-weight: 500; max-width: 100px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pill-chevron { color: var(--color-muted); font-size: 0.55rem; }
.pill-dropdown { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 8px; box-shadow: 0 8px 32px #00000060; min-width: 190px; padding: 0.3rem; position: absolute; right: 0; top: calc(100% + 6px); z-index: 200; }
.pill-item { align-items: center; background: none; border: none; border-radius: 4px; color: var(--color-text); cursor: pointer; display: flex; font-family: var(--font-body); font-size: 0.82rem; gap: 0.55rem; padding: 0.45rem 0.65rem; text-align: left; transition: background var(--ease); width: 100%; }
.pill-item:hover:not([disabled]) { background: var(--color-surface-2); }
.pill-item[disabled] { opacity: 0.4; cursor: not-allowed; }
.pill-item.danger { color: var(--color-danger); }
.pill-divider { border-top: 1px solid var(--color-border); margin: 0.25rem 0; }

/* ── Ad placeholder ───────────────────────────────────────────────────────── */
.ad-placeholder { width: 300px; height: 600px; background: var(--color-surface-2); border: 1px dashed var(--color-border); border-radius: 4px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0.4rem; }
.ad-placeholder-label { color: var(--color-border); font-family: var(--font-mono); font-size: 1.5rem; font-weight: 700; letter-spacing: 0.2em; }
.ad-placeholder-hint { color: var(--color-muted); font-size: 0.68rem; text-align: center; padding: 0 1rem; }

/* ── Library ──────────────────────────────────────────────────────────────── */
.page-scroll { height: 100%; overflow-y: auto; padding: 1.35rem; background: var(--color-bg); }
.page-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 1.1rem; }
.maze-grid { display: grid; gap: 0.85rem; grid-template-columns: repeat(auto-fill, minmax(210px,1fr)); }
.maze-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 6px; cursor: pointer; padding: 1rem; transition: border-color var(--ease), transform var(--ease); }
.maze-card:hover { border-color: var(--color-accent); transform: translateY(-2px); }
.maze-card-name { font-weight: 600; margin-bottom: 0.3rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.maze-card-meta { color: var(--color-muted); font-size: 0.78rem; }

/* ── Login prompt ─────────────────────────────────────────────────────────── */
.login-prompt-card { text-align: center; }
.login-prompt-icon { font-size: 2.75rem; margin-bottom: 0.65rem; }
.login-prompt-title { color: var(--color-accent); font-family: var(--font-mono); font-size: 1.3rem; letter-spacing: 0.1em; margin-bottom: 0.45rem; text-transform: uppercase; }
.login-prompt-time { font-family: var(--font-mono); font-size: 1.9rem; margin-bottom: 0.65rem; }
.login-prompt-sub { color: var(--color-muted); font-size: 0.875rem; line-height: 1.6; margin-bottom: 1.5rem; }
.login-prompt-actions { display: flex; flex-direction: column; gap: 0.55rem; }
.login-prompt-skip { background: none; border: none; color: var(--color-muted); cursor: pointer; font-family: var(--font-body); font-size: 0.78rem; padding: 0.2rem; transition: color var(--ease); }
.login-prompt-skip:hover { color: var(--color-text); }

/* ── Lobby ────────────────────────────────────────────────────────────────── */
.lobby-code { background: var(--color-surface-2); border: 1px solid var(--color-accent); border-radius: 6px; color: var(--color-accent); font-family: var(--font-mono); font-size: 1.5rem; letter-spacing: 0.25em; padding: 0.35rem 0.75rem; text-shadow: 0 0 10px var(--color-accent); }
.lobby-players { background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: 6px; display: flex; flex-direction: column; gap: 0.2rem; min-height: 70px; padding: 0.45rem; margin-bottom: 1rem; }
.lobby-player { align-items: center; display: flex; gap: 0.55rem; padding: 0.3rem 0.45rem; }
.lobby-dot { border-radius: 50%; flex-shrink: 0; height: 10px; width: 10px; }
.lobby-host-badge { background: var(--color-accent-dim); border-radius: 3px; color: var(--color-accent); font-family: var(--font-mono); font-size: 0.6rem; letter-spacing: 0.06em; padding: 0.1rem 0.3rem; }

/* ── Race results ─────────────────────────────────────────────────────────── */
.race-results { display: flex; flex-direction: column; gap: 0.45rem; margin-bottom: 1.35rem; max-height: 260px; overflow-y: auto; }
.race-row { align-items: center; background: var(--color-surface-2); border-radius: 4px; display: flex; gap: 0.6rem; padding: 0.4rem 0.5rem; }
.race-rank { font-size: 1rem; text-align: center; width: 1.75rem; }
.race-dot  { border-radius: 50%; flex-shrink: 0; height: 10px; width: 10px; }
.race-name { flex: 1; font-size: 0.875rem; font-weight: 500; }
.race-time { color: var(--color-accent); font-family: var(--font-mono); font-size: 0.82rem; }