/* ═══════════════════════════════════════════════
   AdTracker — Main Stylesheet
   Design system + layout + components
   ═══════════════════════════════════════════════ */

/* ─── CSS Variables (Light Theme) ─────────────── */
:root {
    --bg-primary: #f5f5f0;
    --bg-secondary: #ffffff;
    --bg-tertiary: #eeeee8;
    --bg-hover: rgba(0,0,0,0.03);
    --bg-active: rgba(59,108,212,0.08);

    --text-primary: #1a1a18;
    --text-secondary: #6b6a65;
    --text-muted: #9b9a95;
    --text-inverse: #ffffff;

    --accent: #3b6cd4;
    --accent-hover: #2a52a8;
    --accent-light: rgba(59,108,212,0.1);
    --success: #1d9e75;
    --success-bg: #f0fdf4;
    --warning: #d4a03b;
    --warning-bg: #fffbeb;
    --danger: #d44040;
    --danger-bg: #fef2f2;
    --info: #3b8fd4;
    --info-bg: #eff6ff;

    --border: rgba(0,0,0,0.08);
    --border-strong: rgba(0,0,0,0.15);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);

    --sidebar-w: 240px;
    --header-h: 56px;
    --radius: 10px;
    --radius-sm: 6px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* ─── Dark Theme ──────────────────────────────── */
[data-theme="dark"] {
    --bg-primary: #141413;
    --bg-secondary: #1e1e1c;
    --bg-tertiary: #2a2a28;
    --bg-hover: rgba(255,255,255,0.05);
    --bg-active: rgba(99,148,255,0.12);

    --text-primary: #e8e8e3;
    --text-secondary: #a0a09b;
    --text-muted: #6b6a65;
    --text-inverse: #1a1a18;

    --accent: #6394ff;
    --accent-hover: #7faeff;
    --accent-light: rgba(99,148,255,0.15);
    --success-bg: #052e16;
    --warning-bg: #422006;
    --danger-bg: #450a0a;
    --info-bg: #1e3a5f;

    --border: rgba(255,255,255,0.08);
    --border-strong: rgba(255,255,255,0.15);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
}

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

body {
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.6;
    background: var(--bg-primary);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* ─── App Layout ──────────────────────────────── */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* ─── Sidebar ─────────────────────────────────── */
.sidebar {
    width: var(--sidebar-w);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform 0.3s;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border);
}

.sidebar-logo {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.sidebar-logo span { color: var(--accent); }

.sidebar-version {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 2px;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 8px;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: 20px;
}

.nav-section-title {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    padding: 0 12px;
    margin-bottom: 6px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    transition: all 0.15s;
}

.nav-link:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.nav-link.active {
    background: var(--bg-active);
    color: var(--accent);
}

.nav-link .nav-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    opacity: 0.7;
}

.nav-link.active .nav-icon { opacity: 1; }

.nav-link .badge {
    margin-left: auto;
    background: var(--danger);
    color: #fff;
    font-size: 10px;
    padding: 1px 6px;
    border-radius: 10px;
    font-weight: 600;
}

/* Sidebar footer */
.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-user {
    font-size: 12px;
    color: var(--text-secondary);
}

.sidebar-user strong {
    display: block;
    color: var(--text-primary);
    font-weight: 600;
}

/* ─── Main Content ────────────────────────────── */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-w);
    min-height: 100vh;
}

.content-header {
    height: var(--header-h);
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 50;
}

.content-header h1 {
    font-size: 18px;
    font-weight: 600;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.content-body {
    padding: 24px 28px;
}

/* ─── Cards ───────────────────────────────────── */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.card-title {
    font-size: 15px;
    font-weight: 600;
}

/* ─── KPI Cards ───────────────────────────────── */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.kpi-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
}

.kpi-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.kpi-value {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -1px;
    line-height: 1.2;
}

.kpi-change {
    font-size: 12px;
    margin-top: 4px;
}

.kpi-change.up { color: var(--success); }
.kpi-change.down { color: var(--danger); }

/* ─── Tables ──────────────────────────────────── */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    text-align: left;
    padding: 10px 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    border-bottom: 2px solid var(--border);
}

.data-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
    vertical-align: middle;
}

.data-table tbody tr:hover {
    background: var(--bg-hover);
}

.data-table .text-right { text-align: right; }
.data-table .text-center { text-align: center; }

/* ─── Buttons ─────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    font-family: var(--font);
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
    line-height: 1.4;
}

.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-lg { padding: 10px 22px; font-size: 15px; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); color: #fff; }

.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-strong);
    color: var(--text-secondary);
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 6px 10px;
}
.btn-ghost:hover { background: var(--bg-hover); color: var(--text-primary); }

/* ─── Forms ───────────────────────────────────── */
.form-group { margin-bottom: 18px; }

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 5px;
    color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.15s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.form-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

.form-row {
    display: flex;
    gap: 16px;
}

.form-row .form-group { flex: 1; }

/* ─── Alerts / Flash Messages ─────────────────── */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    margin-bottom: 16px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.alert-success { background: var(--success-bg); color: var(--success); border: 1px solid; border-color: rgba(29,158,117,0.2); }
.alert-error   { background: var(--danger-bg);  color: var(--danger);  border: 1px solid; border-color: rgba(212,64,64,0.2); }
.alert-warning { background: var(--warning-bg); color: var(--warning); border: 1px solid; border-color: rgba(212,160,59,0.2); }
.alert-info    { background: var(--info-bg);    color: var(--info);    border: 1px solid; border-color: rgba(59,143,212,0.2); }

/* ─── Status Badges ───────────────────────────── */
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
}

.status-active   { background: var(--success-bg); color: var(--success); }
.status-paused   { background: var(--warning-bg); color: var(--warning); }
.status-inactive { background: var(--bg-tertiary); color: var(--text-muted); }
.status-danger   { background: var(--danger-bg);  color: var(--danger); }

/* ─── Platform Badges ─────────────────────────── */
.platform-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.platform-badge.telegram { background: #e8f4fd; color: #0088cc; }
.platform-badge.vk       { background: #e8edf5; color: #4a76a8; }

/* ─── Upload Zone ─────────────────────────────── */
.upload-zone {
    border: 2px dashed var(--border-strong);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--accent);
    background: var(--accent-light);
}

.upload-zone.has-file {
    border-style: solid;
    border-color: var(--success);
    background: var(--success-bg);
}

.upload-zone .upload-title {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.upload-zone .upload-sub {
    font-size: 13px;
    color: var(--text-muted);
}

/* ─── Empty State ─────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 12px;
    opacity: 0.3;
}

.empty-state-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

/* ─── Charts container ────────────────────────── */
.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

/* ─── Utility ─────────────────────────────────── */
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-sm { font-size: 12px; }
.text-mono { font-family: var(--mono); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mb-2 { margin-bottom: 16px; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-2 { gap: 16px; }

/* ─── Date Range Picker ───────────────────────── */
.date-range {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
}

.date-range input[type="date"] {
    padding: 5px 8px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    font-family: var(--font);
    font-size: 13px;
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* ─── Theme Toggle ────────────────────────────── */
.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 8px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1;
}

.theme-toggle:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* ─── Responsive ──────────────────────────────── */
.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--text-primary);
    padding: 4px;
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
    }
    .sidebar-toggle {
        display: block;
    }
    .content-body {
        padding: 16px;
    }
    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .form-row {
        flex-direction: column;
        gap: 0;
    }
}