@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

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

:root {
    --bg-primary: #0f1117;
    --bg-secondary: #1a1d27;
    --bg-card: #1e2130;
    --bg-card-hover: #252840;
    --bg-input: #14161e;
    --border: #2a2d3e;
    --border-light: #353850;
    --text-primary: #e8eaed;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent: #f97316;
    --accent-hover: #fb923c;
    --accent-glow: rgba(249, 115, 22, 0.15);
    --success: #22c55e;
    --error: #ef4444;
    --info: #3b82f6;
    --gradient-fire: linear-gradient(135deg, #f97316 0%, #ef4444 50%, #f59e0b 100%);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
    --radius: 12px;
    --radius-sm: 8px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
}

/* ===== HEADER / NAV ===== */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.navbar-brand .logo {
    font-size: 1.5rem;
    background: var(--gradient-fire);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.navbar-brand .subtitle {
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 400;
}

.nav-links {
    display: flex;
    gap: 4px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s;
}

.nav-links a:hover { color: var(--text-primary); background: var(--bg-card); }
.nav-links a.active { color: var(--accent); background: var(--accent-glow); }

/* ===== LOCATION TABS ===== */
.location-tabs {
    display: flex;
    gap: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 0 2rem;
}

.location-tab {
    padding: 12px 24px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
    letter-spacing: 0.3px;
}

.location-tab:hover { color: var(--text-primary); background: rgba(255,255,255,0.03); }
.location-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ===== MAIN CONTENT ===== */
.main-content { padding: 2rem; max-width: 1600px; margin: 0 auto; }

/* ===== MONTH NAVIGATION ===== */
.month-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-bottom: 2rem;
}

.month-nav h2 {
    font-size: 1.5rem;
    font-weight: 700;
    min-width: 200px;
    text-align: center;
    background: var(--gradient-fire);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.month-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border);
    font-weight: 500;
    transition: all 0.2s;
}

.month-nav a:hover { color: var(--text-primary); border-color: var(--accent); }

/* ===== CARDS ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255,255,255,0.02);
}

.card-header h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-body { padding: 0; }

/* ===== DATA TABLE ===== */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

.data-table th {
    background: rgba(249, 115, 22, 0.08);
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.8px;
    padding: 10px 12px;
    text-align: center;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.data-table th:first-child { text-align: left; padding-left: 20px; }

.data-table td {
    padding: 8px 12px;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    font-variant-numeric: tabular-nums;
}

.data-table td:first-child { text-align: left; padding-left: 20px; color: var(--text-secondary); font-weight: 500; }

.data-table tr:hover td { background: rgba(255,255,255,0.03); }

.data-table tr.row-total {
    background: rgba(249, 115, 22, 0.06);
    border-top: 2px solid var(--border);
}

.data-table tr.row-total td { font-weight: 700; color: var(--text-primary); padding: 10px 12px; }

.data-table tr.row-average td { color: var(--text-muted); font-style: italic; }

.data-table .col-count { color: var(--text-primary); font-weight: 600; }
.data-table .col-duration { color: var(--text-muted); font-size: 0.78rem; }
.data-table .col-leads { color: var(--info); font-weight: 500; }
.data-table .col-inbound { color: var(--success); }
.data-table .col-total { color: var(--accent); font-weight: 700; }

/* Column group separators */
.data-table .col-group-start { border-left: 2px solid var(--border-light); }

/* ===== MONTHLY TOTALS ===== */
.monthly-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: all 0.2s;
}

.stat-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: var(--shadow-md); }

.stat-card .stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-fire);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-card .stat-detail { font-size: 0.8rem; color: var(--text-secondary); margin-top: 4px; }

/* ===== UPLOAD PAGE ===== */
.upload-zone {
    border: 2px dashed var(--border-light);
    border-radius: var(--radius);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: var(--bg-card);
    margin-bottom: 1.5rem;
}

.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.upload-zone .upload-icon { font-size: 3rem; margin-bottom: 1rem; }
.upload-zone .upload-text { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.5rem; }
.upload-zone .upload-hint { font-size: 0.85rem; color: var(--text-muted); }

.upload-form { margin-top: 1rem; }

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-select, .form-input {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-select:focus, .form-input:focus { outline: none; border-color: var(--accent); }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(249,115,22,0.3); }

.btn-sm { padding: 6px 12px; font-size: 0.78rem; }
.btn-danger { background: var(--error); color: white; }
.btn-danger:hover { background: #dc2626; }
.btn-ghost { background: transparent; color: var(--text-secondary); border-color: var(--border); }
.btn-ghost:hover { color: var(--text-primary); border-color: var(--text-secondary); }

/* ===== ALERTS ===== */
.alert {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success { background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.3); color: var(--success); }
.alert-error { background: rgba(239,68,68,0.1); border: 1px solid rgba(239,68,68,0.3); color: var(--error); }
.alert-info { background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.3); color: var(--info); }

/* ===== UPLOAD HISTORY ===== */
.upload-list { list-style: none; }

.upload-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    transition: background 0.2s;
}

.upload-item:hover { background: rgba(255,255,255,0.02); }
.upload-item:last-child { border-bottom: none; }

.upload-item .upload-info { display: flex; flex-direction: column; gap: 2px; }
.upload-item .upload-name { font-weight: 600; font-size: 0.85rem; }
.upload-item .upload-meta { font-size: 0.75rem; color: var(--text-muted); }
.upload-item .upload-status { font-size: 0.75rem; font-weight: 600; }
.upload-item .upload-status.complete { color: var(--success); }
.upload-item .upload-status.error { color: var(--error); }
.upload-item .upload-status.processing { color: var(--info); }

/* ===== SETTINGS ===== */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

.phone-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.phone-card h4 {
    font-size: 1rem;
    margin-bottom: 4px;
}

.phone-card .phone-number { color: var(--text-muted); font-size: 0.8rem; margin-bottom: 12px; font-variant-numeric: tabular-nums; }

.inline-form { display: flex; gap: 8px; align-items: flex-end; }
.inline-form .form-group { flex: 1; margin-bottom: 0; }

.tag-list { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
}

.tag .remove-btn {
    background: none;
    border: none;
    color: var(--error);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    padding: 0;
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.empty-state .empty-icon { font-size: 3rem; margin-bottom: 1rem; opacity: 0.5; }
.empty-state h3 { color: var(--text-secondary); margin-bottom: 0.5rem; }
.empty-state p { font-size: 0.9rem; margin-bottom: 1.5rem; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .navbar { padding: 0 1rem; }
    .main-content { padding: 1rem; }
    .location-tabs { padding: 0 1rem; overflow-x: auto; }
    .monthly-summary { grid-template-columns: 1fr 1fr; }
    .settings-grid { grid-template-columns: 1fr; }
    .data-table { font-size: 0.75rem; }
    .data-table th, .data-table td { padding: 6px 8px; }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.card { animation: fadeIn 0.3s ease-out; }
.card:nth-child(2) { animation-delay: 0.05s; }
.card:nth-child(3) { animation-delay: 0.1s; }

/* ===== LOADING SPINNER ===== */
.spinner { display: inline-block; width: 20px; height: 20px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* File input hidden */
.file-input-hidden { display: none; }