/* ===== CSS Custom Properties (Theming) ===== */
:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #e0e7ff;
    --secondary: #7c3aed;
    --success: #10b981;
    --success-hover: #059669;
    --warning: #f59e0b;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --info: #06b6d4;
    --bg-body: #f0f2f5;
    --bg-card: #ffffff;
    --bg-navbar: #ffffff;
    --bg-input: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
    --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
}

[data-bs-theme="dark"] {
    --bg-body: #0f172a;
    --bg-card: #1e293b;
    --bg-navbar: #1e293b;
    --bg-input: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --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 10px 30px rgba(0,0,0,0.5);
    --primary-light: #312e81;
}

/* ===== Base ===== */
body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    transition: var(--transition);
    min-height: 100vh;
}

.main-content {
    padding: 1.5rem 0;
    min-height: calc(100vh - 62px);
}

a { color: var(--primary); }
a:hover { color: var(--primary-hover); }

/* ===== Navbar ===== */
.main-navbar {
    background: var(--bg-navbar) !important;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 0.5rem 1rem;
    z-index: 1030;
    transition: var(--transition);
}

.main-navbar .navbar-brand {
    color: var(--primary) !important;
    font-size: 1.25rem;
    letter-spacing: -0.5px;
}

.main-navbar .nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    padding: 0.5rem 0.85rem !important;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-size: 0.9rem;
}

.main-navbar .nav-link:hover,
.main-navbar .nav-link.active {
    color: var(--primary) !important;
    background: var(--primary-light);
}

.main-navbar .dropdown-menu {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
}

.main-navbar .dropdown-item {
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    margin: 2px 4px;
    transition: var(--transition);
}

.main-navbar .dropdown-item:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.navbar-text {
    color: var(--text-secondary) !important;
    font-size: 0.85rem;
}

.user-badge {
    background: var(--primary-light);
    color: var(--primary) !important;
    padding: 0.3rem 0.75rem;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.85rem;
}

#liveClock {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.3rem 0.75rem;
    border-radius: 20px;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary) !important;
}

.btn-theme-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--warning) !important;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-theme-toggle:hover {
    background: var(--warning);
    color: #fff !important;
    border-color: var(--warning);
}

.btn-logout {
    background: var(--danger);
    border-color: var(--danger);
    color: #fff !important;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-logout:hover {
    background: var(--danger-hover);
    color: #fff !important;
}

/* ===== Cards ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.25rem;
    font-weight: 600;
}

.card-body { padding: 1.25rem; }

/* ===== Dashboard Cards ===== */
.dash-card {
    text-decoration: none !important;
    border: none;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    color: #fff;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 1rem;
    min-height: 100px;
}

.dash-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    color: #fff;
}

.dash-card .dash-icon {
    font-size: 2rem;
    opacity: 0.9;
    width: 56px;
    height: 56px;
    background: rgba(255,255,255,0.2);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.dash-card .dash-text {
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: -0.3px;
}

.dash-card .dash-desc {
    font-size: 0.78rem;
    opacity: 0.85;
    margin-top: 2px;
}

.bg-gradient-primary { background: linear-gradient(135deg, #4f46e5, #7c3aed); }
.bg-gradient-success { background: linear-gradient(135deg, #10b981, #059669); }
.bg-gradient-info { background: linear-gradient(135deg, #06b6d4, #0284c7); }
.bg-gradient-warning { background: linear-gradient(135deg, #f59e0b, #d97706); }
.bg-gradient-danger { background: linear-gradient(135deg, #ef4444, #dc2626); }
.bg-gradient-violet { background: linear-gradient(135deg, #7c3aed, #9333ea); }
.bg-gradient-teal { background: linear-gradient(135deg, #14b8a6, #0d9488); }
.bg-gradient-dark { background: linear-gradient(135deg, #475569, #334155); }

/* ===== Tables ===== */
.table {
    color: var(--text-primary);
    --bs-table-bg: transparent;
}

.table thead th {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
    border: none;
    padding: 0.75rem;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

[data-bs-theme="dark"] .table thead th {
    background: #312e81;
    color: #a5b4fc;
}

.table td {
    padding: 0.65rem 0.75rem;
    vertical-align: middle;
    border-color: var(--border-color);
}

.table-hover tbody tr:hover {
    background: var(--primary-light);
}

/* ===== Forms ===== */
.form-control, .form-select {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    padding: 0.55rem 0.85rem;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
    background: var(--bg-input);
    color: var(--text-primary);
}

.form-label {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.35rem;
}

.input-group .form-control,
.input-group .form-select {
    border-radius: var(--radius-sm);
}

/* ===== Buttons ===== */
.btn {
    border-radius: var(--radius-sm);
    font-weight: 500;
    padding: 0.5rem 1.1rem;
    transition: var(--transition);
    font-size: 0.9rem;
}

.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
}
.btn-primary:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
}

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

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

.btn-warning {
    background: var(--warning);
    border-color: var(--warning);
    color: #fff;
}
.btn-warning:hover { color: #fff; }

.btn-info {
    background: var(--info);
    border-color: var(--info);
    color: #fff;
}
.btn-info:hover { color: #fff; }

.btn-outline-secondary {
    border-color: var(--border-color);
    color: var(--text-secondary);
}
.btn-outline-secondary:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

/* ===== Alerts ===== */
.alert {
    border-radius: var(--radius-sm);
    border: none;
    font-size: 0.9rem;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
}
.alert-danger {
    background: #fee2e2;
    color: #991b1b;
}
.alert-warning {
    background: #fef3c7;
    color: #92400e;
}
.alert-info {
    background: #dbeafe;
    color: #1e40af;
}

[data-bs-theme="dark"] .alert-success { background: #064e3b; color: #6ee7b7; }
[data-bs-theme="dark"] .alert-danger { background: #7f1d1d; color: #fca5a5; }
[data-bs-theme="dark"] .alert-warning { background: #78350f; color: #fcd34d; }
[data-bs-theme="dark"] .alert-info { background: #1e3a5f; color: #93c5fd; }

/* ===== Badges ===== */
.badge { font-weight: 500; padding: 0.4em 0.65em; border-radius: 6px; }

/* ===== Product Cards (Ventas) ===== */
.producto-card {
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    height: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
}

.producto-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.producto-card .card-img-top {
    height: 120px;
    object-fit: cover;
    background: var(--bg-body);
}

.producto-card .card-body {
    padding: 0.75rem;
}

.producto-card .card-title {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.producto-card .card-text {
    color: var(--success);
    font-weight: 700;
    font-size: 1.05rem;
}

/* ===== Auth Pages (Login/Register) ===== */
.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    padding: 2rem;
}

.auth-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 440px;
    padding: 2.5rem;
    border: none;
}

.auth-card .auth-logo {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.auth-card h3 {
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

.auth-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== Stats Cards (Dashboard) ===== */
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.25rem;
    text-align: center;
}

.stat-card .stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-card .stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== Cart Sidebar (Ventas) ===== */
.cart-section {
    position: sticky;
    top: 80px;
}

.cart-table th {
    font-size: 0.78rem;
}

.cart-table td {
    font-size: 0.85rem;
    padding: 0.4rem 0.5rem;
}

.cart-total {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.cart-total-discounted {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--success);
}

/* ===== Search bar ===== */
.search-bar {
    position: relative;
}

.search-bar .form-control {
    padding-left: 2.5rem;
    border-radius: 25px;
    height: 45px;
    font-size: 0.95rem;
}

.search-bar .search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

/* ===== Page Header ===== */
.page-header {
    margin-bottom: 1.5rem;
}

.page-header h4 {
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.3px;
}

.page-header .subtitle {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===== Keyboard Shortcuts Badge ===== */
.kbd {
    background: var(--bg-body);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.15rem 0.4rem;
    font-family: monospace;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ===== Welcome Banner ===== */
.welcome-banner {
    background: var(--gradient);
    border-radius: var(--radius-lg);
    padding: 2rem;
    color: #fff;
    margin-bottom: 1.5rem;
}

.welcome-banner h2 {
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.welcome-banner p {
    opacity: 0.9;
    margin-bottom: 0;
}

/* ===== Misc ===== */
.text-gradient {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.img-product-thumb {
    width: 45px;
    height: 45px;
    object-fit: cover;
    border-radius: 8px;
    background: var(--bg-body);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .main-content { padding: 1rem 0; }
    .container-fluid { padding: 0 0.75rem; }
    .dash-card { min-height: 80px; padding: 1rem; }
    .dash-card .dash-icon { width: 44px; height: 44px; font-size: 1.5rem; }
    .cart-section { position: static; }
    #liveClock { display: none; }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-body); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in { animation: fadeIn 0.3s ease-out; }

/* ===== Shortcuts bar (ventas) ===== */
.shortcuts-bar {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 0.5rem 0;
    font-size: 0.78rem;
    color: var(--text-muted);
}

.shortcuts-bar span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}