/* ===== Variables ===== */
:root {
    --color-primary: #0088cc;
    --color-primary-dark: #006699;
    --color-primary-soft: rgba(0, 136, 204, 0.08);
    --color-success: #22c55e;
    --color-success-soft: #dcfce7;
    --color-danger: #ef4444;
    --color-danger-soft: #fee2e2;
    --color-warning: #eab308;
    --color-warning-soft: #fef9c3;
    --color-info: #0ea5e9;
    --color-info-soft: #e0f2fe;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-bg: #f8fafc;
    --color-bg-card: #ffffff;
    --color-border: #e2e8f0;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.06);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-bg);
    background-image:
        radial-gradient(ellipse 100% 60% at 50% -10%, var(--color-primary-soft), transparent 45%),
        linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    color: var(--color-text);
    line-height: 1.5;
    padding: 12px 16px 24px;
    min-height: 100vh;
    font-size: 14px;
}

.container {
    max-width: 860px;
    margin: 0 auto;
}

/* ===== Compact typography ===== */
h1 {
    font-size: clamp(1.4rem, 3.5vw, 1.75rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.25rem;
    color: var(--color-primary);
    line-height: 1.2;
}

h2 {
    font-size: 1.15rem;
    font-weight: 600;
    margin: 1.25rem 0 0.5rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
}

h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0.75rem 0 0.35rem;
    color: var(--color-text);
}

p, li {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ===== Page header — compact ===== */
.page-header {
    text-align: center;
    margin: 16px 0 20px;
    padding: 20px 16px;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.page-header .subtitle {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    font-weight: 500;
    margin-top: 2px;
}

.page-header .badges {
    margin-top: 10px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
}

/* ===== Cards — compact ===== */
.card {
    background: var(--color-bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 12px 14px;
    margin-bottom: 10px;
    border: 1px solid var(--color-border);
}

.card:hover {
    border-color: rgba(0, 136, 204, 0.2);
}

.card h3 {
    margin-top: 0;
}

.card p {
    margin: 4px 0 0;
}

/* ===== Tables — compact ===== */
.table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 8px 0;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

table {
    width: 100%;
    min-width: 280px;
    border-collapse: collapse;
    font-size: 0.8rem;
}

th {
    background: var(--color-primary);
    color: white;
    padding: 8px 10px;
    text-align: left;
    font-weight: 600;
    font-size: 0.75rem;
    white-space: nowrap;
}

td {
    padding: 8px 10px;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: 0.8rem;
}

tr:last-child td {
    border-bottom: none;
}

tbody tr:hover {
    background: var(--color-primary-soft);
}

/* ===== Chat messages — compact ===== */
.chat-message {
    background: var(--color-bg-card);
    border-radius: var(--radius);
    padding: 10px 12px;
    margin: 6px 0;
    font-family: 'SF Mono', 'Consolas', monospace;
    font-size: 0.8rem;
    border-left: 3px solid;
    border: 1px solid var(--color-border);
    border-left-width: 3px;
}

.chat-message.user { border-left-color: var(--color-primary); }
.chat-message.bot { border-left-color: var(--color-success); }
.chat-message.admin { border-left-color: var(--color-danger); }

.chat-message div {
    margin: 2px 0;
}

.keyboard-simple {
    display: inline-block;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 6px 10px;
    margin-top: 6px;
    background: #f8fafc;
    font-size: 0.8rem;
}

.keyboard-button {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text);
}

/* ===== Status badges ===== */
.status-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.status-success { background: var(--color-success-soft); color: #15803d; }
.status-warning { background: var(--color-warning-soft); color: #a16207; }
.status-error { background: var(--color-danger-soft); color: #b91c1c; }
.status-info { background: var(--color-info-soft); color: #0369a1; }

/* ===== Two columns ===== */
.two-cols {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 8px 0;
}

.two-cols .card {
    margin-bottom: 0;
}

/* ===== CTA block — compact ===== */
.cta-block {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    border-radius: var(--radius-lg);
    padding: 20px 18px;
    margin: 20px 0 16px;
    border: none;
}

.cta-block h2 {
    color: white;
    border-bottom-color: rgba(255, 255, 255, 0.3);
    margin: 0 0 0.5rem;
    padding-bottom: 0.5rem;
}

.summary-block .summary-row {
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.25);
}

.summary-block .summary-row:first-child { padding-top: 0; }
.summary-block .summary-row-last { border-bottom: none; padding-bottom: 0; }

.summary-block .summary-row ul {
    list-style: none;
    padding: 0;
    margin: 6px 0 0;
}

.summary-block .summary-row li {
    margin: 3px 0;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.95);
}

/* ===== Footer — compact ===== */
footer {
    margin-top: 24px;
    padding: 16px 12px;
    text-align: center;
    color: var(--color-text-muted);
    border-top: 1px solid var(--color-border);
    font-size: 0.8rem;
}

footer p { margin: 3px 0; }
footer .footer-meta { margin-top: 6px; opacity: 0.9; }

/* ===== Example blocks — compact ===== */
.example-block {
    margin-bottom: 1rem;
}

.example-block h3 {
    margin-top: 0.9rem;
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.example-block h3:first-child { margin-top: 0; }

.example-when,
.example-to {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin: 2px 0 4px;
}

.example-to { margin-top: 8px; }

.cleanup-list {
    list-style: none;
    padding: 0;
    margin: 6px 0 0;
}

.cleanup-list li { margin: 3px 0; font-size: 0.9rem; }

/* ===== Mobile first: base compact, then expand for desktop ===== */
@media (min-width: 641px) {
    body { padding: 16px 20px 32px; font-size: 14px; }
    .page-header { margin: 20px 0 24px; padding: 24px 20px; }
    h2 { margin: 1.5rem 0 0.6rem; font-size: 1.2rem; }
    .card { padding: 14px 18px; margin-bottom: 12px; }
    table { font-size: 0.85rem; }
    th, td { padding: 10px 12px; }
    .chat-message { padding: 12px 14px; font-size: 0.85rem; margin: 8px 0; }
    .two-cols { gap: 16px; margin: 10px 0; }
    .cta-block { padding: 24px 22px; margin: 28px 0 20px; }
}

/* ===== Mobile: < 640px ===== */
@media (max-width: 640px) {
    body {
        padding: 10px 12px 20px;
        font-size: 14px;
    }

    .container {
        max-width: 100%;
    }

    .page-header {
        margin: 12px 0 16px;
        padding: 16px 12px;
    }

    .page-header .subtitle {
        font-size: 0.9rem;
    }

    h1 {
        font-size: 1.35rem;
    }

    h2 {
        font-size: 1.05rem;
        margin: 1rem 0 0.4rem;
        padding-bottom: 0.35rem;
    }

    h3 {
        font-size: 0.95rem;
        margin: 0.6rem 0 0.25rem;
    }

    .two-cols {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .card {
        padding: 12px 14px;
    }

    .chat-message {
        padding: 10px 12px;
        font-size: 0.8rem;
    }

    .keyboard-simple {
        padding: 8px 12px;
    }

    .keyboard-button {
        min-height: 44px;
        padding: 10px 14px;
        display: inline-flex;
        align-items: center;
    }

    .cta-block {
        padding: 16px 14px;
        margin: 16px 0 12px;
    }

    .summary-block .summary-row {
        padding: 10px 0;
    }

    .summary-block .summary-row li {
        font-size: 0.82rem;
    }

    footer {
        margin-top: 20px;
        padding: 12px 10px;
        font-size: 0.78rem;
    }

    .example-block {
        margin-bottom: 0.75rem;
    }

    .example-block h3 {
        margin-top: 0.75rem;
        font-size: 0.9rem;
    }
}

/* Мобильные таблицы: горизонтальный скролл */
@media (max-width: 640px) {
    .table-wrap {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: 6px 0;
        border: 1px solid var(--color-border);
        border-radius: var(--radius);
    }

    .table-wrap table {
        min-width: 380px;
    }
}