@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&family=VT323&display=swap');

/* ─── DESIGN TOKENS ──────────────────────────────────────── */
:root {
    --bg:           #0d1117;
    --surface:      #161b22;
    --surface-2:    #1c2330;
    --border:       #2a3f52;
    --border-bright:#3a5a70;
    --accent:       #00ffe1;
    --accent-dim:   #00998a;
    --accent-glow:  rgba(0, 255, 225, 0.15);
    --text:         #8ab8c8;
    --text-bright:  #d0eaf5;
    --text-muted:   #3a5a6a;
    --danger:       #ff5555;
    --gold:         #ffd700;
    --silver:       #c0c0c0;
    --bronze:       #cd7f32;
}

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

html { font-size: 16px; }

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Share Tech Mono', 'Courier New', monospace;
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Subtle scanline overlay */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 3px,
        rgba(0, 0, 0, 0.04) 3px,
        rgba(0, 0, 0, 0.04) 4px
    );
    pointer-events: none;
    z-index: 999;
}

a { color: var(--accent-dim); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent); }

/* ─── LAYOUT ─────────────────────────────────────────────── */

/* Full-viewport centered column — for welcome / register / registered */
.lacuna-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
    padding: 2rem 1.5rem;
}

/* Narrow content card — ~420 px */
.lacuna-container--sm {
    width: 100%;
    max-width: 420px;
}

/* Standard wide container — for leaderboard main */
.lacuna-container {
    max-width: 860px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* ─── HEADER ─────────────────────────────────────────────── */
.lacuna-header {
    border-bottom: 1px solid var(--border);
    padding: 2rem;
    text-align: center;
    position: relative;
}

/* Accent underline glow on header */
.lacuna-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 180px;
    height: 1px;
    background: var(--accent);
    box-shadow: 0 0 14px var(--accent);
}

/* ─── LOGO + SUBTITLE ────────────────────────────────────── */
.lacuna-logo {
    font-family: 'VT323', monospace;
    font-size: 3.2rem;
    color: var(--accent);
    text-shadow: 0 0 20px var(--accent), 0 0 50px rgba(0, 255, 225, 0.25);
    letter-spacing: 0.35em;
}

.lacuna-subtitle {
    font-size: 0.7rem;
    color: var(--accent-dim);
    letter-spacing: 0.4em;
    margin-top: 0.4rem;
}

/* ─── DIVIDER ────────────────────────────────────────────── */
.lacuna-divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2rem 0;
    width: 100%;
}

/* ─── CARD / SURFACE ─────────────────────────────────────── */
.lacuna-card {
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 1.5rem 2rem;
    transition: border-color 0.2s;
}

.lacuna-card:hover { border-color: var(--border-bright); }

/* ─── FORM ELEMENTS ──────────────────────────────────────── */
.lacuna-label {
    display: block;
    font-size: 0.65rem;
    letter-spacing: 0.3em;
    color: var(--accent-dim);
    text-transform: uppercase;
    text-align: left;
    margin-bottom: 0.4rem;
}

.lacuna-input {
    width: 100%;
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--text-bright);
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.9rem;
    padding: 0.75rem 1rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    letter-spacing: 0.05em;
}

.lacuna-input:focus {
    border-color: var(--accent-dim);
    box-shadow: 0 0 0 1px var(--accent-dim), 0 0 12px var(--accent-glow);
}

.lacuna-input::placeholder { color: var(--text-muted); }

.lacuna-btn {
    display: inline-block;
    background: transparent;
    border: 1px solid var(--accent-dim);
    color: var(--accent);
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.85rem;
    letter-spacing: 0.25em;
    padding: 0.75rem 2rem;
    cursor: pointer;
    text-decoration: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
    text-transform: uppercase;
    margin-top: 1.5rem;
}

.lacuna-btn:hover {
    border-color: var(--accent);
    background: var(--accent-glow);
    box-shadow: 0 0 16px var(--accent-glow);
    color: var(--accent);
}

/* Full-width button variant */
.lacuna-btn--full { width: 100%; text-align: center; }

/* ─── BADGE ──────────────────────────────────────────────── */
.lacuna-badge {
    display: inline-block;
    font-size: 0.6rem;
    letter-spacing: 0.25em;
    padding: 0.25rem 0.7rem;
    border: 1px solid var(--accent);
    color: var(--accent);
    text-shadow: 0 0 6px var(--accent);
    text-transform: uppercase;
}

/* ─── CODE BLOCK ─────────────────────────────────────────── */
.lacuna-code {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-left: 2px solid var(--accent-dim);
    color: var(--accent);
    padding: 1rem 1.25rem;
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    overflow-x: auto;
    word-break: break-all;
    text-align: left;
    line-height: 1.7;
    margin: 1rem 0;
}

/* ─── ALERTS ─────────────────────────────────────────────── */
.lacuna-error {
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 0.6rem 1rem;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    text-align: left;
}

/* ─── FOOTER ─────────────────────────────────────────────── */
.lacuna-footer {
    text-align: center;
    padding: 2rem;
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 0.3em;
    border-top: 1px solid var(--border);
    margin-top: 3rem;
}

.lacuna-footer a { color: var(--accent-dim); }
.lacuna-footer a:hover { color: var(--accent); }

/* ─── PROGRESS BAR ───────────────────────────────────────── */
.lacuna-progress {
    height: 4px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    overflow: hidden;
}

.lacuna-progress-fill {
    height: 100%;
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent);
    transition: width 0.5s ease;
}

/* ─── BACK LINK ──────────────────────────────────────────── */
.lacuna-back-link {
    display: inline-block;
    margin-top: 2rem;
    color: var(--text);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    transition: color 0.2s;
}

.lacuna-back-link:hover { color: var(--accent); }

/* ─── BLINK CURSOR ───────────────────────────────────────── */
.blink { display: inline-block; animation: lacuna-blink 2s infinite; }

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

/* ══════════════════════════════════════════════════════════
   LEADERBOARD — page-specific styles
   ══════════════════════════════════════════════════════════ */

.refresh-note {
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-top: 0.8rem;
    letter-spacing: 0.2em;
}

.refresh-note span { color: var(--accent-dim); }

/* Stats summary bar */
.stats-bar {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
    padding: 1rem 1.5rem;
    border: 1px solid var(--border);
    background: var(--surface);
}

.stat { display: flex; flex-direction: column; gap: 0.2rem; }

.stat-label {
    font-size: 0.6rem;
    letter-spacing: 0.3em;
    color: var(--accent-dim);
}

.stat-value {
    font-size: 1.4rem;
    color: var(--text-bright);
}

.stat-value .of {
    font-size: 0.8rem;
    color: var(--accent-dim);
}

/* Table header row */
.table-header {
    display: grid;
    grid-template-columns: 60px 1fr 140px 80px;
    padding: 0.6rem 1rem;
    font-size: 0.6rem;
    letter-spacing: 0.3em;
    color: var(--accent-dim);
    border-bottom: 1px solid var(--border);
    margin-bottom: 0.5rem;
}

.table-header span:last-child { text-align: right; }

/* Solver row */
.solver-row {
    display: grid;
    grid-template-columns: 60px 1fr 140px 80px;
    align-items: center;
    padding: 0.85rem 1rem;
    border: 1px solid transparent;
    border-left: 2px solid transparent;
    margin-bottom: 0.3rem;
    background: var(--surface);
    transition: border-color 0.2s, background 0.2s;
    cursor: default;
}

.solver-row:hover {
    border-color: var(--border);
    background: var(--surface-2);
}

/* Medal border accents */
.solver-row.rank-1 { border-left-color: var(--gold); }
.solver-row.rank-2 { border-left-color: var(--silver); }
.solver-row.rank-3 { border-left-color: var(--bronze); }

/* Rank glyph */
.rank {
    font-family: 'VT323', monospace;
    font-size: 1.4rem;
    text-align: center;
}

.rank-1 .rank { color: var(--gold);   text-shadow: 0 0 10px var(--gold); }
.rank-2 .rank { color: var(--silver); }
.rank-3 .rank { color: var(--bronze); }
.solver-row:not(.rank-1):not(.rank-2):not(.rank-3) .rank { color: var(--text-muted); }

/* Solver ID column */
.solver-id {
    font-size: 0.85rem;
    color: var(--text-bright);
    letter-spacing: 0.05em;
}

.solver-id .short { color: var(--accent); }
.solver-id .rest  { color: var(--text); opacity: 0.5; }

/* Progress column */
.progress-wrap { display: flex; flex-direction: column; gap: 0.3rem; }

.progress-label {
    font-size: 0.6rem;
    color: var(--text);
    letter-spacing: 0.1em;
}

.progress-bar {
    height: 4px;
    background: var(--text-muted);
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    box-shadow: 0 0 6px var(--accent);
    transition: width 0.5s ease;
}

.rank-1 .progress-fill { background: var(--gold);   box-shadow: 0 0 6px var(--gold); }
.rank-2 .progress-fill { background: var(--silver);  box-shadow: none; }
.rank-3 .progress-fill { background: var(--bronze);  box-shadow: none; }

/* Step count column */
.step-count { font-size: 0.85rem; text-align: right; color: var(--text-bright); }
.step-count .total { color: var(--accent-dim); font-size: 0.7rem; }

/* Complete badge */
.complete-badge {
    display: inline-block;
    font-size: 0.55rem;
    letter-spacing: 0.2em;
    padding: 0.2rem 0.5rem;
    border: 1px solid var(--accent);
    color: var(--accent);
    text-shadow: 0 0 6px var(--accent);
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
    letter-spacing: 0.2em;
    font-size: 0.8rem;
}

.empty-state .glyph {
    font-family: 'VT323', monospace;
    font-size: 3rem;
    color: var(--border);
    display: block;
    margin-bottom: 1rem;
}

.empty-state .awaiting {
    color: var(--border);
    margin-top: 0.5rem;
    display: block;
}

/* ─── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 600px) {
    .lacuna-logo { font-size: 2.2rem; }
    .lacuna-container { padding: 1.5rem 1rem; }
    .table-header,
    .solver-row { grid-template-columns: 45px 1fr 100px 60px; }
    .stats-bar { gap: 1.2rem; }
}