/**
 * Application Theme overrides
 *
 * Applies Bootswatch Lumen styling across the custom timesheet UI while
 * preserving the original dark mode experience via CSS variables.
 */

:root {
    --primary-color: var(--bs-primary);
    --primary-dark: #0b5ed7;
    --primary-rgb: var(--bs-primary-rgb);
    --secondary-color: rgba(15, 23, 42, 0.08);
    --success-color: var(--bs-success);
    --warning-color: var(--bs-warning);
    --danger-color: var(--bs-danger);
    --dark-color: rgba(33, 37, 41, 0.92);
    --darker-color: rgba(21, 24, 30, 0.98);
    --light-color: rgba(255, 255, 255, 0.94);
    --lighter-color: #ffffff;
    --border-color: rgba(13, 27, 51, 0.14);
    --text-primary: #1a1f36;
    --text-secondary: #6c7788;
    --shadow: 0 0.875rem 2rem rgba(15, 23, 42, 0.12);
    --shadow-lg: 0 1.75rem 3rem rgba(15, 23, 42, 0.18);
    --surface-card: rgba(255, 255, 255, 0.96);
    --surface-muted: rgba(248, 250, 252, 0.92);
    --surface-glass: rgba(255, 255, 255, 0.72);
    --surface-border: rgba(15, 23, 42, 0.08);
}

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(140deg, #f5f7ff 0%, #e6f3ff 28%, #f9fbff 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding-top: 0.75rem;
}

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

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.app-header {
    background: var(--surface-card);
    backdrop-filter: blur(18px);
    border-radius: 22px;
    padding: 1.85rem 2.25rem;
    margin: 0 0 1.25rem 0;
    border: 1px solid var(--surface-border);
    box-shadow: var(--shadow);
    color: var(--text-primary);
}

.app-title {
    font-weight: 700;
    font-size: 2.25rem;
    color: var(--primary-dark);
}

.app-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    letter-spacing: 0.01em;
}

#theme-toggle {
    border-radius: 999px;
    padding: 0.6rem 1.3rem;
    font-weight: 600;
    color: var(--text-secondary);
}

#theme-toggle i {
    font-size: 1.05rem;
}

#theme-toggle:hover {
    color: var(--primary-dark);
}

.main-content {
    background: var(--surface-card);
    border-radius: 26px;
    border: 1px solid var(--surface-border);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.nav-bar {
    background: var(--surface-glass);
    border-radius: 18px;
    padding: 1rem;
    border: 1px solid var(--surface-border);
    box-shadow: var(--shadow);
}

.nav-tabs {
    backdrop-filter: blur(12px);
    background: transparent;
    border-radius: inherit;
    border: none;
    padding: 0;
}

.tab-content {
    background: var(--surface-card);
}

.stat-card,
.quick-actions,
.active-session-card,
.clock-section,
.history-card,
.reports-panel,
.project-card,
.invoice-card {
    background: var(--surface-card);
    border: 1px solid var(--surface-border);
    box-shadow: var(--shadow);
}

.action-btn {
    background: var(--surface-muted);
    border-color: var(--surface-border);
    color: var(--text-primary);
}

.action-btn:hover {
    background: rgba(var(--primary-rgb), 0.12);
    color: var(--primary-dark);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border-radius: 0.85rem;
    font-weight: 600;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

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

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-outline-secondary {
    border-color: var(--surface-border);
    color: var(--text-secondary);
}

.btn-outline-secondary:hover {
    background-color: rgba(var(--primary-rgb), 0.1);
    border-color: rgba(var(--primary-rgb), 0.25);
    color: var(--primary-dark);
}

.form-control {
    background: var(--surface-muted);
    border-color: var(--surface-border);
    color: var(--text-primary);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(var(--primary-rgb), 0.2);
}

.modal-overlay,
.modal-backdrop {
    backdrop-filter: blur(6px);
}

.modal .modal-content {
    background: var(--surface-card);
    border: 1px solid var(--surface-border);
    box-shadow: var(--shadow-lg);
}


/* === Dark mode overrides (retain original aesthetic) === */
body.dark-mode {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: #f9fafb;
    padding-top: 0.75rem;
    --primary-color: #8b5cf6;
    --primary-dark: #7c3aed;
    --primary-rgb: 139, 92, 246;
    --secondary-color: #374151;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --dark-color: #111827;
    --darker-color: #0f172a;
    --light-color: rgba(31, 41, 55, 0.95);
    --lighter-color: #374151;
    --border-color: rgba(75, 85, 99, 0.6);
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.3), 0 1px 2px -1px rgb(0 0 0 / 0.2);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --surface-card: rgba(31, 41, 55, 0.95);
    --surface-muted: rgba(31, 41, 55, 0.9);
    --surface-glass: rgba(31, 41, 55, 0.6);
    --surface-border: rgba(75, 85, 99, 0.5);
}

body.dark-mode a {
    color: var(--primary-color);
}

body.dark-mode a:hover {
    color: var(--primary-dark);
}

body.dark-mode #theme-toggle {
    border-color: var(--border-color);
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
}

body.dark-mode #theme-toggle:hover {
    background: rgba(255, 255, 255, 0.14);
}