/* =============================================
   Admin Dashboard Styles
   ============================================= */

:root {
    --primary: #13eca4;
    --primary-dark: #0fd693;
    --primary-glow: rgba(19, 236, 164, 0.15);
    --bg: #0d1b16;
    --bg-light: #10221c;
    --surface: #1c2e28;
    --surface-hover: #243832;
    --text: #ffffff;
    --text-secondary: #9db9b0;
    --text-muted: #637588;
    --border: #3b544b;
    --error: #ef4444;
    --warning: #f59e0b;
    --success: #22c55e;
    --info: #3b82f6;
    --radius: 12px;
    --radius-sm: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; background: var(--bg); color: var(--text); }

/* ===== LOGIN ===== */
.login-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
}
.login-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px 40px;
    text-align: center;
    width: 100%;
    max-width: 400px;
}
.login-logo { font-size: 40px; margin-bottom: 16px; }
.login-logo .logo-text { font-size: 24px; font-weight: 800; }
.logo-ai { color: var(--primary); }
.login-card h2 { font-size: 22px; margin-bottom: 4px; }
.login-card p { color: var(--text-secondary); font-size: 14px; margin-bottom: 24px; }
.login-error { color: var(--error); font-size: 13px; margin-top: 12px; padding: 8px; background: rgba(239,68,68,0.1); border-radius: var(--radius-sm); }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s;
}
.btn-primary { background: var(--primary); color: var(--bg); }
.btn-primary:hover { box-shadow: 0 4px 20px var(--primary-glow); transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--text-secondary); border: 1px solid var(--border); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-danger { background: rgba(239,68,68,0.15); color: var(--error); }
.btn-danger:hover { background: rgba(239,68,68,0.25); }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-full { width: 100%; justify-content: center; }

/* ===== DASHBOARD LAYOUT ===== */
.dashboard { display: flex; min-height: 100vh; }

/* SIDEBAR */
.sidebar {
    width: 240px;
    background: var(--bg-light);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 50;
}
.sidebar-header {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--border);
}
.logo-icon { font-size: 22px; }
.logo-text { font-size: 18px; font-weight: 800; color: var(--text); }
.sidebar-nav { flex: 1; padding: 12px; display: flex; flex-direction: column; gap: 4px; }
.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 14px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s;
    text-align: left;
}
.nav-item:hover { background: var(--surface); color: var(--text); }
.nav-item.active { background: var(--primary-glow); color: var(--primary); font-weight: 600; }
.nav-icon { font-size: 18px; }
.sidebar-footer { padding: 16px; border-top: 1px solid var(--border); }
.admin-info { display: flex; gap: 10px; align-items: center; margin-bottom: 12px; }
.admin-avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--primary-glow); display: flex; align-items: center; justify-content: center; font-weight: 700; color: var(--primary); font-size: 14px; overflow: hidden; }
.admin-details { display: flex; flex-direction: column; }
.admin-name { font-size: 13px; font-weight: 600; color: var(--text); }
.admin-role { font-size: 11px; color: var(--text-muted); }
.btn-logout { width: 100%; padding: 8px; font-size: 12px; font-weight: 500; color: var(--text-muted); background: none; border: 1px solid var(--border); border-radius: var(--radius-sm); cursor: pointer; font-family: inherit; margin-bottom: 8px; transition: 0.2s; }
.btn-logout:hover { border-color: var(--error); color: var(--error); }
.btn-back { display: block; text-align: center; font-size: 12px; color: var(--text-muted); padding: 6px; }

/* MAIN */
.main { flex: 1; margin-left: 240px; }
.topbar {
    padding: 16px 32px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-light);
    position: sticky;
    top: 0;
    z-index: 40;
}
.topbar h1 { font-size: 20px; font-weight: 700; }
.topbar-time { color: var(--text-muted); font-size: 13px; }
.content { padding: 24px 32px; }

/* ===== PAGES ===== */
.page { display: none; }
.page.active { display: block; animation: fadeUp 0.3s; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ===== KPI CARDS ===== */
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.kpi-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    gap: 14px;
    align-items: center;
    transition: transform 0.2s;
}
.kpi-card:hover { transform: translateY(-2px); }
.kpi-icon { font-size: 32px; }
.kpi-value { display: block; font-size: 28px; font-weight: 800; color: var(--primary); }
.kpi-label { font-size: 12px; color: var(--text-muted); font-weight: 500; }

/* Color variants via top border */
.kpi-users { border-top: 3px solid var(--info); }
.kpi-generations { border-top: 3px solid var(--primary); }
.kpi-pro { border-top: 3px solid var(--warning); }
.kpi-signups { border-top: 3px solid var(--success); }

/* ===== CHARTS ===== */
.charts-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 24px; }
.chart-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}
.chart-card h3 { font-size: 15px; font-weight: 700; margin-bottom: 16px; }
.chart-card-wide { grid-column: span 2; }
.chart-wrap { max-height: 260px; position: relative; }
.chart-stat { text-align: center; padding: 40px 0; }
.chart-stat-value { display: block; font-size: 48px; font-weight: 900; color: var(--primary); }
.chart-stat-label { font-size: 14px; color: var(--text-muted); }

/* ===== TABLES ===== */
.page-toolbar { display: flex; gap: 12px; margin-bottom: 16px; align-items: center; }
.search-input {
    flex: 1;
    padding: 10px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}
.search-input:focus { border-color: var(--primary); }
.search-input::placeholder { color: var(--text-muted); }
.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
    text-align: left;
    padding: 10px 14px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-light);
}
.data-table td {
    padding: 12px 14px;
    font-size: 14px;
    border-bottom: 1px solid rgba(59,84,75,0.4);
    vertical-align: middle;
}
.data-table tbody tr { transition: background 0.1s; }
.data-table tbody tr:hover { background: var(--surface); }
.loading-cell { text-align: center; color: var(--text-muted); padding: 40px !important; }

/* Tier badges */
.tier-badge {
    padding: 3px 10px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
}
.tier-free { background: rgba(99,117,136,0.2); color: var(--text-muted); }
.tier-pro { background: rgba(245,158,11,0.15); color: var(--warning); }
.tier-unlimited { background: var(--primary-glow); color: var(--primary); }
.role-badge { padding: 3px 10px; border-radius: 100px; font-size: 11px; font-weight: 700; }
.role-admin { background: rgba(239,68,68,0.15); color: var(--error); }
.role-user { background: rgba(99,117,136,0.2); color: var(--text-muted); }

/* ===== MODALS ===== */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}
.modal-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    width: 100%;
    max-width: 420px;
}
.modal-content h3 { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.modal-content > p { color: var(--text-secondary); font-size: 13px; margin-bottom: 16px; }
.modal-actions { display: flex; gap: 12px; margin-top: 20px; justify-content: flex-end; }

/* ===== FORMS ===== */
.form-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 16px;
}
.form-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 16px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-group label { font-size: 12px; font-weight: 600; color: var(--text-secondary); }
.form-input {
    padding: 10px 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    outline: none;
    width: 100%;
    transition: border-color 0.2s;
}
.form-input:focus { border-color: var(--primary); }
.form-actions { display: flex; gap: 12px; margin-top: 16px; justify-content: flex-end; }

/* ===== TOAST ===== */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 24px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    z-index: 9999;
    animation: slideInToast 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 12px 40px rgba(0,0,0,0.4);
    display: flex;
    align-items: center;
    gap: 12px;
}
.toast.success { border-left: 4px solid var(--primary); }
.toast.success::before { content: '✅'; font-size: 16px; }
.toast.error { border-left: 4px solid var(--error); }
.toast.error::before { content: '❌'; font-size: 16px; }
@keyframes slideInToast { from { transform: translateY(100px) scale(0.9); opacity: 0; } to { transform: none; opacity: 1; } }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
    .sidebar { display: none; }
    .main { margin-left: 0; }
    .kpi-grid { grid-template-columns: 1fr 1fr; }
    .charts-grid { grid-template-columns: 1fr; }
    .chart-card-wide { grid-column: span 1; }
    .form-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
    .kpi-grid { grid-template-columns: 1fr; }
    .content { padding: 16px; }
}