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

:root {
    --saas-bg: #f4f6fa;
    --saas-primary: #4f46e5;
    --saas-primary-light: #818cf8;
    --saas-primary-dark: #3730a3;
    --saas-primary-bg: #eef2ff;
    --saas-accent: #f59e0b;
    --saas-accent-bg: #fffbeb;
    --saas-text: #1e293b;
    --saas-muted: #64748b;
    --saas-surface: #ffffff;
    --saas-border: #e2e8f0;
    --saas-danger: #ef4444;
    --saas-danger-bg: #fef2f2;
    --saas-success: #10b981;
    --saas-success-bg: #ecfdf5;
    --saas-warning: #f59e0b;
    --saas-warning-bg: #fffbeb;
    --saas-info: #3b82f6;
    --saas-info-bg: #eff6ff;
    --saas-sidebar-w: 260px;
    --saas-topbar-h: 64px;
    --saas-radius: 12px;
    --saas-shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --saas-shadow: 0 4px 24px rgba(0,0,0,0.06);
    --saas-shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; }

body.saas-body {
    margin: 0;
    font-family: 'Inter', system-ui, sans-serif;
    color: var(--saas-text);
    background: var(--saas-bg);
    min-height: 100vh;
}

/* ===== SIDEBAR ===== */
.saas-sidebar {
    position: fixed;
    top: 0; left: 0;
    width: var(--saas-sidebar-w);
    height: 100vh;
    background: linear-gradient(180deg, #1e1b4b 0%, #312e81 100%);
    color: #c7d2fe;
    display: flex;
    flex-direction: column;
    z-index: 1050;
    transition: transform 0.3s ease;
}

.saas-sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.25rem 1.25rem 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.saas-brand-icon {
    width: 38px; height: 38px;
    border-radius: 10px;
    background: var(--saas-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #fff;
    flex-shrink: 0;
}

.saas-brand-name {
    font-weight: 700;
    font-size: 1.05rem;
    color: #fff;
    display: block;
    line-height: 1.2;
}

.saas-brand-version {
    font-size: 0.7rem;
    color: #818cf8;
    font-weight: 500;
}

.saas-sidebar-close {
    background: none;
    border: none;
    color: #c7d2fe;
    font-size: 1.2rem;
    margin-left: auto;
    cursor: pointer;
    padding: 4px;
}

/* Navigation */
.saas-sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem 0.75rem;
}

.saas-nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.9rem;
    border-radius: 10px;
    color: #c7d2fe;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.15s ease;
    margin-bottom: 2px;
}

.saas-nav-item:hover {
    background: rgba(255,255,255,0.08);
    color: #fff;
}

.saas-nav-item.active {
    background: var(--saas-primary);
    color: #fff;
    box-shadow: 0 2px 12px rgba(79,70,229,0.4);
}

.saas-nav-item i {
    font-size: 1.1rem;
    width: 22px;
    text-align: center;
    flex-shrink: 0;
}

.saas-nav-divider {
    height: 1px;
    background: rgba(255,255,255,0.08);
    margin: 0.5rem 0.5rem;
}

/* Sidebar Footer */
.saas-sidebar-footer {
    padding: 0.75rem;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.saas-user-card {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem;
    border-radius: 10px;
    background: rgba(255,255,255,0.05);
}

.saas-user-avatar {
    width: 36px; height: 36px;
    border-radius: 10px;
    background: var(--saas-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

.saas-user-name {
    font-size: 0.82rem;
    font-weight: 600;
    color: #e0e7ff;
    line-height: 1.2;
}

.saas-user-role {
    font-size: 0.7rem;
    color: #818cf8;
}

.saas-user-info { flex: 1; min-width: 0; }
.saas-user-name, .saas-user-role {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.saas-logout-btn {
    color: #c7d2fe;
    font-size: 1.1rem;
    padding: 4px;
    transition: color 0.15s;
    flex-shrink: 0;
}

.saas-logout-btn:hover {
    color: var(--saas-danger);
}

/* ===== OVERLAY (mobile) ===== */
.saas-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1040;
    backdrop-filter: blur(2px);
}

.saas-overlay.active { display: block; }

/* ===== MAIN CONTENT ===== */
.saas-main {
    margin-left: var(--saas-sidebar-w);
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

.saas-content-topbar {
    height: var(--saas-topbar-h);
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--saas-surface);
    border-bottom: 1px solid var(--saas-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.saas-page-title {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--saas-text);
    line-height: 1.2;
}

.saas-page-subtitle {
    margin: 0;
    font-size: 0.8rem;
    color: var(--saas-muted);
}

.saas-topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.saas-hamburger {
    background: none;
    border: none;
    font-size: 1.4rem;
    color: var(--saas-text);
    cursor: pointer;
    padding: 4px;
}

.saas-content {
    padding: 1.5rem;
}

/* ===== CARDS / PANELS ===== */
.saas-card {
    background: var(--saas-surface);
    border: 1px solid var(--saas-border);
    border-radius: var(--saas-radius);
    box-shadow: var(--saas-shadow-sm);
}

.saas-card-body { padding: 1.25rem; }

.saas-card-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--saas-border);
    font-weight: 600;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Metric Cards */
.saas-metric {
    padding: 1.25rem;
    border-radius: var(--saas-radius);
    background: var(--saas-surface);
    border: 1px solid var(--saas-border);
    box-shadow: var(--saas-shadow-sm);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.saas-metric:hover {
    box-shadow: var(--saas-shadow);
    transform: translateY(-2px);
}

.saas-metric-icon {
    width: 44px; height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.saas-metric-icon.purple { background: var(--saas-primary-bg); color: var(--saas-primary); }
.saas-metric-icon.green { background: var(--saas-success-bg); color: var(--saas-success); }
.saas-metric-icon.amber { background: var(--saas-warning-bg); color: var(--saas-warning); }
.saas-metric-icon.blue { background: var(--saas-info-bg); color: var(--saas-info); }
.saas-metric-icon.red { background: var(--saas-danger-bg); color: var(--saas-danger); }

.saas-metric-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--saas-text);
    line-height: 1;
}

.saas-metric-label {
    font-size: 0.82rem;
    color: var(--saas-muted);
    font-weight: 500;
    margin-top: 2px;
}

.saas-metric-trend {
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 2px 6px;
    border-radius: 6px;
}

.saas-metric-trend.up { color: var(--saas-success); background: var(--saas-success-bg); }
.saas-metric-trend.down { color: var(--saas-danger); background: var(--saas-danger-bg); }

/* ===== STATUS CHIPS ===== */
.saas-chip {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 0.2rem 0.65rem;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid transparent;
    gap: 4px;
}

.saas-chip-open, .saas-chip-active, .saas-chip-trial { background: var(--saas-info-bg); color: var(--saas-info); border-color: #bfdbfe; }
.saas-chip-inprogress, .saas-chip-past_due { background: var(--saas-warning-bg); color: #b45309; border-color: #fde68a; }
.saas-chip-closed, .saas-chip-paid { background: var(--saas-success-bg); color: var(--saas-success); border-color: #a7f3d0; }
.saas-chip-cancelled, .saas-chip-inactive, .saas-chip-expired { background: var(--saas-danger-bg); color: var(--saas-danger); border-color: #fecaca; }
.saas-chip-draft { background: #f8fafc; color: #64748b; border-color: #e2e8f0; }

/* ===== TABLES ===== */
.saas-table-wrap { overflow-x: auto; }

.saas-table-wrap table {
    margin-bottom: 0;
    font-size: 0.875rem;
}

.saas-table-wrap thead th {
    color: var(--saas-muted);
    font-weight: 600;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    background: #f8fafc;
    border-bottom: 1px solid var(--saas-border);
    padding: 0.75rem 1rem;
    white-space: nowrap;
}

.saas-table-wrap td {
    padding: 0.75rem 1rem;
    vertical-align: middle;
    border-bottom: 1px solid #f1f5f9;
}

.saas-table-wrap tbody tr:hover {
    background: #f8fafc;
}

.saas-table-empty {
    text-align: center;
    color: var(--saas-muted);
    padding: 3rem 1rem;
}

/* ===== BUTTONS ===== */
.saas-btn-primary {
    border: none;
    color: #fff;
    background: var(--saas-primary);
    border-radius: 10px;
    min-height: 40px;
    font-weight: 600;
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    transition: all 0.15s ease;
}

.saas-btn-primary:hover {
    color: #fff;
    background: var(--saas-primary-dark);
    box-shadow: 0 4px 12px rgba(79,70,229,0.3);
}

.saas-btn-secondary {
    border-radius: 10px;
    border: 1px solid var(--saas-border);
    color: var(--saas-text);
    background: var(--saas-surface);
    font-weight: 500;
    font-size: 0.875rem;
    min-height: 40px;
    padding: 0.5rem 1rem;
    transition: all 0.15s ease;
}

.saas-btn-secondary:hover {
    background: #f8fafc;
    border-color: #cbd5e1;
}

.saas-btn-danger {
    border: none;
    color: #fff;
    background: var(--saas-danger);
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.875rem;
    min-height: 40px;
    padding: 0.5rem 1rem;
}

.saas-btn-danger:hover {
    color: #fff;
    background: #dc2626;
}

.saas-btn-sm {
    min-height: 32px;
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
}

/* ===== FORMS ===== */
.form-control, .form-select {
    border-radius: 10px;
    border-color: var(--saas-border);
    min-height: 42px;
    font-size: 0.9rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--saas-primary-light);
    box-shadow: 0 0 0 3px rgba(79,70,229,0.12);
}

.form-label {
    font-weight: 600;
    font-size: 0.82rem;
    color: var(--saas-text);
    margin-bottom: 0.35rem;
}

/* ===== ALERTS ===== */
.saas-alert {
    border-radius: var(--saas-radius);
    border: 1px solid;
    padding: 0.85rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.saas-alert-success { background: var(--saas-success-bg); border-color: #a7f3d0; color: #065f46; }
.saas-alert-danger { background: var(--saas-danger-bg); border-color: #fecaca; color: #991b1b; }
.saas-alert-warning { background: var(--saas-warning-bg); border-color: #fde68a; color: #92400e; }
.saas-alert-info { background: var(--saas-info-bg); border-color: #bfdbfe; color: #1e40af; }

/* ===== PROGRESS BARS ===== */
.saas-progress {
    height: 6px;
    border-radius: 3px;
    background: #e2e8f0;
    overflow: hidden;
}

.saas-progress-bar {
    height: 100%;
    border-radius: 3px;
    transition: width 0.4s ease;
}

.saas-progress-bar.green { background: var(--saas-success); }
.saas-progress-bar.amber { background: var(--saas-warning); }
.saas-progress-bar.red { background: var(--saas-danger); }
.saas-progress-bar.purple { background: var(--saas-primary); }

/* ===== EMPTY STATES ===== */
.saas-empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--saas-muted);
}

.saas-empty-state i {
    font-size: 3rem;
    opacity: 0.3;
    margin-bottom: 1rem;
}

/* ===== LOGIN (standalone, no sidebar) ===== */
.saas-login-wrap {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 1.2rem;
    background:
        radial-gradient(circle at 10% 20%, rgba(79,70,229,0.08) 0%, transparent 30%),
        radial-gradient(circle at 90% 80%, rgba(245,158,11,0.06) 0%, transparent 25%),
        var(--saas-bg);
}

.saas-login-card {
    width: min(100%, 440px);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--saas-border);
    box-shadow: var(--saas-shadow-lg);
    background: var(--saas-surface);
}

.saas-login-header {
    padding: 1.75rem 1.5rem;
    background: linear-gradient(135deg, #1e1b4b 0%, #4f46e5 100%);
    color: #fff;
    text-align: center;
}

.saas-login-header h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
}

.saas-login-header p {
    margin: 0.4rem 0 0 0;
    opacity: 0.85;
    font-size: 0.9rem;
}

.saas-login-body { padding: 1.5rem; }

.saas-login-foot {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--saas-muted);
    text-align: center;
}

/* Legacy compat (old pages not yet migrated) */
.saas-shell {
    max-width: 1220px;
    margin: 0 auto;
    padding: 2.2rem 1rem;
}

.saas-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.2rem;
}

.saas-title {
    margin: 0;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--saas-primary);
}

.saas-subtitle {
    margin: 0.15rem 0 0 0;
    color: var(--saas-muted);
    font-size: 0.85rem;
}

.saas-panel {
    background: var(--saas-surface);
    border: 1px solid var(--saas-border);
    border-radius: var(--saas-radius);
    box-shadow: var(--saas-shadow-sm);
}

.saas-panel-body { padding: 1.25rem; }

/* ===== RESPONSIVE ===== */
@media (max-width: 991.98px) {
    .saas-sidebar {
        transform: translateX(-100%);
    }

    .saas-sidebar.open {
        transform: translateX(0);
    }

    .saas-main {
        margin-left: 0;
    }
}

@media (max-width: 768px) {
    .saas-content {
        padding: 1rem;
    }

    .saas-content-topbar {
        padding: 0 1rem;
    }

    .saas-metric-value {
        font-size: 1.4rem;
    }
}

@media (max-width: 576px) {
    .saas-content {
        padding: 0.75rem;
    }
}