/* ── HFT Dashboard — Dark Theme ── */

:root {
    --bg: #0f1117;
    --bg-card: #1a1d27;
    --bg-input: #252833;
    --border: #2d3142;
    --text: #e2e8f0;
    --text-dim: #94a3b8;
    --green: #4ade80;
    --red: #f87171;
    --blue: #60a5fa;
    --yellow: #fbbf24;
    --accent: #818cf8;
    --radius: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

.mono { font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace; }

/* ── Nav ── */

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.5rem;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
}

.nav-brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--accent);
}

.nav-links { display: flex; gap: 1rem; align-items: center; }

.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius);
    transition: background 0.2s;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--text);
    background: var(--bg-input);
}

/* ── Cards ── */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.2rem;
}

.card h2 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-dim);
    margin-bottom: 0.8rem;
}

.card h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-dim);
    margin-bottom: 0.4rem;
}

/* ── Dashboard Grid ── */

.grid-dashboard {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    padding: 1.5rem;
    max-width: 1100px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .grid-dashboard { grid-template-columns: 1fr; }
}

/* ── Stat Rows ── */

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.3rem 0;
    border-bottom: 1px solid var(--border);
}

.stat-row:last-child { border-bottom: none; }

.stats-row {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    padding: 0.5rem 0;
}
.stat {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}
.stat-label {
    color: var(--text-dim);
    font-size: 0.8rem;
    text-transform: uppercase;
}
.stat-value {
    font-size: 1.1rem;
    font-weight: 600;
}

.label { color: var(--text-dim); font-size: 0.85rem; }
.value { font-size: 0.9rem; font-weight: 500; }

.green { color: var(--green); }
.red { color: var(--red); }

/* ── Badges ── */

.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-green { background: rgba(74, 222, 128, 0.15); color: var(--green); }
.badge-red { background: rgba(248, 113, 113, 0.15); color: var(--red); }
.badge-gray { background: rgba(148, 163, 184, 0.15); color: var(--text-dim); }

/* ── Buttons ── */

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: opacity 0.2s;
}

.btn:hover { opacity: 0.85; }

.btn-success { background: var(--green); color: #000; }
.btn-danger { background: var(--red); color: #000; }
.btn-ghost {
    background: transparent;
    color: var(--text-dim);
    border: 1px solid var(--border);
}

.btn-small { padding: 0.3rem 0.6rem; font-size: 0.8rem; }

.btn-group { display: flex; gap: 0.5rem; }

/* ── Login ── */

.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    width: 100%;
    max-width: 380px;
}

.login-card h1 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--accent);
}

.login-card input {
    width: 100%;
    padding: 0.6rem 0.8rem;
    margin-bottom: 0.8rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 0.9rem;
}

.login-card button {
    width: 100%;
    padding: 0.7rem;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
}

.error-msg {
    background: rgba(248, 113, 113, 0.15);
    color: var(--red);
    padding: 0.5rem 0.8rem;
    border-radius: var(--radius);
    margin-bottom: 0.8rem;
    text-align: center;
    font-size: 0.85rem;
}

/* ── Container ── */

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* ── Log Table ── */

.log-controls {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.log-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

.log-table th {
    text-align: left;
    padding: 0.5rem 0.6rem;
    background: var(--bg-card);
    border-bottom: 2px solid var(--border);
    color: var(--text-dim);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.log-table td {
    padding: 0.4rem 0.6rem;
    border-bottom: 1px solid var(--border);
}

.log-table tr:hover { background: var(--bg-card); }

.note {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--text-dim);
}

.center { text-align: center; color: var(--text-dim); }

/* ── Config Form ── */

.config-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 768px) {
    .config-grid { grid-template-columns: 1fr; }
}

fieldset {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.8rem 1rem;
}

legend {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0 0.4rem;
}

.config-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.3rem 0;
}

.config-row label {
    font-size: 0.82rem;
    color: var(--text-dim);
    font-family: 'JetBrains Mono', monospace;
}

.config-row input[type="text"],
.config-row input[type="number"] {
    width: 120px;
    padding: 0.3rem 0.5rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
    text-align: right;
}

.config-row input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
}

/* ── Toast ── */

.toast {
    position: fixed;
    top: 1rem;
    right: 1rem;
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius);
    font-weight: 600;
    z-index: 1000;
}

.toast-ok { background: rgba(74, 222, 128, 0.2); color: var(--green); }
.toast-error { background: rgba(248, 113, 113, 0.2); color: var(--red); }
.toast-order {
    background: rgba(74, 222, 128, 0.15);
    color: var(--green);
    border: 1px solid rgba(74, 222, 128, 0.4);
    font-size: 0.95rem;
    line-height: 1.5;
    animation: toast-slide 0.3s ease-out;
}
@keyframes toast-slide {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ── Depth Table ── */

.depth-table {
    width: 100%;
    border-collapse: collapse;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.75rem;
}

.depth-table thead th {
    text-align: right;
    padding: 0.25rem 0.4rem;
    color: var(--text-dim);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border);
}

.depth-table tbody td {
    text-align: right;
    padding: 0.2rem 0.4rem;
    border-bottom: 1px solid rgba(45, 49, 66, 0.5);
}

.depth-table .bid-row { background: rgba(74, 222, 128, 0.06); }
.depth-table .ask-row { background: rgba(248, 113, 113, 0.06); }
.depth-table .bid-row td:first-child { color: var(--green); }
.depth-table .ask-row td:first-child { color: var(--red); }
.depth-table .empty-row td { color: var(--text-dim); text-align: center; }