@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;600;700&display=swap');

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

:root {
    --bg: #060609;
    --surface: #0d0d14;
    --border: rgba(255, 77, 77, 0.15);
    --accent: #ff4d4d;
    --green: #4ade80;
    --red: #ef4444;
    --text: #e4e4e7;
    --text-dim: #71717a;
    --font: 'JetBrains Mono', monospace;
    --radius: 12px;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    line-height: 1.6;
    padding: 1rem;
    max-width: 1400px;
    margin: 0 auto;
}

/* === Banners === */
.offline-banner, .stale-banner {
    display: none;
    text-align: center;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 8px;
    margin-bottom: 1rem;
    color: #fff;
}
.offline-banner { background: var(--red); }
.stale-banner { background: #b8860b; cursor: help; }
.offline-banner.active, .stale-banner.active { display: block; }

/* === Header === */
.header { text-align: center; padding: 1.5rem 0 1rem; }
.header h1 { font-size: 2rem; font-weight: 700; color: var(--accent); }
.subtitle { color: var(--text-dim); font-size: 0.85rem; font-weight: 300; margin-top: 0.25rem; }

.link-btn {
    background: none; border: none; color: var(--text-dim); font-family: var(--font);
    font-size: 0.8rem; cursor: pointer; text-decoration: underline; text-underline-offset: 2px;
}
.link-btn:hover { color: var(--accent); }

/* === Metriky === */
.metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin: 1.5rem 0;
}
.metric-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    display: flex; flex-direction: column; gap: 0.25rem;
    transition: border-color 0.2s;
}
.metric-card:hover { border-color: var(--accent); }
.metric-label { font-size: 0.7rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; }
.metric-value { font-size: 1.4rem; font-weight: 700; }

/* === Controls === */
.controls {
    display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem; margin: 1rem 0 0.5rem;
}
.search-wrap { flex: 1; min-width: 200px; }
#search {
    width: 100%;
    background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
    padding: 0.6rem 1rem; color: var(--text); font-family: var(--font); font-size: 0.85rem;
    outline: none; transition: border-color 0.2s;
}
#search:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(255, 77, 77, 0.1); }
#search::placeholder { color: var(--text-dim); }

#sort-select {
    background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
    padding: 0.6rem 0.75rem; color: var(--text); font-family: var(--font); font-size: 0.8rem;
    cursor: pointer; outline: none;
}
#sort-select:focus { border-color: var(--accent); }

.btn {
    background: var(--accent); color: #fff; border: none; border-radius: 8px;
    padding: 0.6rem 1.25rem; font-family: var(--font); font-size: 0.8rem; font-weight: 600;
    cursor: pointer; transition: opacity 0.2s, transform 0.2s; white-space: nowrap;
}
.btn:hover { opacity: 0.85; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.refreshing { animation: pulse 1s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

/* === Refresh progress bar === */
.refresh-bar-wrap {
    height: 3px; background: var(--surface); border-radius: 2px; margin: 0.5rem 0 0.25rem; overflow: hidden;
}
.refresh-bar {
    height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent), #ff8c4d);
    border-radius: 2px; transition: width 1s linear;
}

/* === Status row === */
.status-row {
    display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.5rem;
    margin-bottom: 0.5rem;
}
.data-source, .last-update, .countdown { font-size: 0.7rem; color: var(--text-dim); }

/* === Loading === */
.loading { text-align: center; padding: 3rem; color: var(--text-dim); font-size: 0.9rem; display: none; }
.loading.active { display: block; }

/* === Coins Grid === */
.coins-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem; margin: 1rem 0;
}

.coin-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 1.25rem; display: flex; flex-direction: column; gap: 0.5rem;
    transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.coin-card:hover {
    border-color: var(--accent); transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 77, 77, 0.08);
}
.coin-card.hidden { display: none; }

.coin-header { display: flex; align-items: center; gap: 0.75rem; }
.coin-icon { width: 32px; height: 32px; border-radius: 50%; background: var(--bg); flex-shrink: 0; }
.coin-icon-fallback {
    width: 32px; height: 32px; border-radius: 50%; background: var(--accent);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.75rem; font-weight: 700; flex-shrink: 0;
}
.coin-name { font-weight: 600; font-size: 0.95rem; }
.coin-ticker { color: var(--text-dim); font-size: 0.75rem; text-transform: uppercase; }

/* Change badge */
.change-badge {
    margin-left: auto; padding: 0.25rem 0.6rem; border-radius: 6px;
    font-size: 0.8rem; font-weight: 600; white-space: nowrap;
}
.change-badge.up { background: rgba(74, 222, 128, 0.12); color: var(--green); }
.change-badge.down { background: rgba(239, 68, 68, 0.12); color: var(--red); }

/* Sparkline */
.sparkline-wrap { width: 100%; height: 50px; margin: 0.25rem 0; }
.sparkline { width: 100%; height: 100%; display: block; }

.coin-price { font-size: 1.3rem; font-weight: 700; }

.coin-meta {
    display: flex; justify-content: space-between;
    font-size: 0.7rem; color: var(--text-dim); margin-top: 0.25rem;
}

/* === Descriptions === */
.descriptions { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--border); }
.descriptions h2 { font-size: 1.3rem; color: var(--accent); margin-bottom: 1.5rem; }
.desc-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1rem; }
.desc-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; }
.desc-card h3 { font-size: 0.9rem; font-weight: 600; margin-bottom: 0.5rem; }
.desc-card p { font-size: 0.8rem; color: var(--text-dim); line-height: 1.7; }

/* === Shortcuts modal === */
.shortcuts-modal {
    position: fixed; inset: 0; background: rgba(0,0,0,0.7); display: flex;
    align-items: center; justify-content: center; z-index: 1000; cursor: pointer;
}
.shortcuts-content {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 2rem; max-width: 380px; width: 90%; cursor: default;
}
.shortcuts-content h3 { margin-bottom: 1rem; color: var(--accent); font-size: 1.1rem; }
.shortcuts-content table { width: 100%; }
.shortcuts-content td { padding: 0.4rem 0; font-size: 0.85rem; }
.shortcuts-content td:first-child { color: var(--text-dim); width: 40%; }
.shortcuts-content kbd {
    background: var(--bg); border: 1px solid var(--border); border-radius: 4px;
    padding: 0.15rem 0.5rem; font-family: var(--font); font-size: 0.8rem;
}
.shortcuts-close { margin-top: 1rem; font-size: 0.75rem; color: var(--text-dim); text-align: center; }

/* === Version === */
.version { text-align: center; padding: 2rem 0 1rem; font-size: 0.7rem; color: var(--text-dim); }

/* === SR only === */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* === Responsive === */
@media (max-width: 768px) {
    body { padding: 0.5rem; }
    .header h1 { font-size: 1.5rem; }
    .header { padding: 1rem 0 0.5rem; }
    .metrics { grid-template-columns: 1fr; gap: 0.75rem; }
    .coins-grid { grid-template-columns: 1fr; }
    .desc-grid { grid-template-columns: 1fr; }
    .controls { gap: 0.5rem; }
    .metric-value { font-size: 1.1rem; }
    .coin-price { font-size: 1.1rem; }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .metrics { grid-template-columns: repeat(3, 1fr); }
    .coins-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1025px) {
    .coins-grid { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
}