/* ================================================
   Ödeme Takip Sistemi - Dark Glassmorphism Theme
   Inspired by Kreatifart Muhasebe UI
   ================================================ */

:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.85);
    --bg-input: rgba(15, 23, 42, 0.9);
    --bg-sidebar: rgba(10, 14, 26, 0.97);
    --border-color: rgba(255, 77, 41, 0.15);
    --border-hover: rgba(255, 77, 41, 0.35);
    --border-focus: rgba(255, 77, 41, 0.6);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #ff4d29;
    --accent-2: #ff784e;
    --accent-gradient: linear-gradient(135deg, #ff4d29, #ff784e);
    --accent-glow: rgba(255, 77, 41, 0.25);
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --success-bg: rgba(16, 185, 129, 0.12);
    --danger-bg: rgba(239, 68, 68, 0.12);
    --warning-bg: rgba(245, 158, 11, 0.12);
    --info-bg: rgba(59, 130, 246, 0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, .15);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, .25);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, .4);
    --shadow-glow: 0 0 30px rgba(255, 77, 41, .15);
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.08);
    --sidebar-w: 265px;
    --topbar-h: 64px;
    --transition: 0.25s ease;
}

:root.light-mode {
    --bg-primary: #f1f5f9;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-input: #ffffff;
    --bg-sidebar: #ffffff;
    --border-color: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.18);
    --border-focus: rgba(255, 77, 41, 0.4);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(0, 0, 0, 0.06);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, .05);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, .08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, .1);
    --shadow-glow: 0 0 20px rgba(0, 0, 0, .05);
}

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

html {
    font-size: 15px;
    scroll-behavior: smooth;
}

body.ots-app {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(255, 77, 41, .05) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(255, 120, 78, .03) 0%, transparent 50%);
    transition: background .3s, color .3s;
}

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

a:hover {
    color: var(--accent-2);
}

/* ====== SIDEBAR ====== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-w);
    height: 100vh;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 100;
    overflow-y: auto;
    transition: transform .35s cubic-bezier(.4, 0, .2, 1);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: .75rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--accent-gradient);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 12px rgba(255, 77, 41, .35);
    flex-shrink: 0;
}

.logo-icon svg,
.logo-icon i {
    width: 20px;
    height: 20px;
    color: #fff;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.logo-subtitle {
    font-size: .7rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.sidebar-close {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: .4rem;
    border-radius: var(--radius-sm);
    line-height: 0;
}

.sidebar-close:hover {
    background: rgba(255, 255, 255, .05);
    color: var(--text-primary);
}

/* Nav */
.sidebar-nav {
    flex: 1;
    padding: 1rem .75rem;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section-title {
    display: block;
    font-size: .7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--text-muted);
    padding: 0 .75rem;
    margin-bottom: .5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: .55rem .75rem;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: .875rem;
    font-weight: 450;
    transition: color .25s, transform .2s;
    margin-bottom: 2px;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.nav-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(255, 77, 41, .12), transparent);
    border-radius: var(--radius-sm);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .35s cubic-bezier(.25, .46, .45, .94);
    z-index: -1;
}

.nav-item svg,
.nav-item i {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    transition: transform .25s;
}

.nav-item:hover::before {
    transform: scaleX(1);
}

.nav-item:hover {
    color: var(--text-primary);
    transform: translateX(4px);
}

.nav-item:hover svg,
.nav-item:hover i {
    transform: scale(1.15);
}

.nav-item.active {
    color: #fff;
    background: var(--accent-gradient);
    font-weight: 500;
    box-shadow: 0 2px 12px rgba(255, 77, 41, .3);
}

.nav-item.active::before {
    display: none;
}

.nav-item.active svg,
.nav-item.active i {
    color: #fff;
}

.logout-btn {
    color: var(--danger) !important;
}

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

/* Sidebar Footer */
.sidebar-footer {
    padding: 1rem .75rem;
    border-top: 1px solid var(--border-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: .65rem;
    padding: .5rem .75rem;
    margin-bottom: .5rem;
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--accent-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.user-avatar svg,
.user-avatar i {
    width: 18px;
    height: 18px;
    color: #fff;
}

.user-details {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-size: .85rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.2;
}

.user-role {
    font-size: .72rem;
    color: var(--text-muted);
}

/* Overlay */
.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .6);
    backdrop-filter: blur(4px);
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ====== MAIN ====== */
.main-content {
    margin-left: var(--sidebar-w);
    min-height: 100vh;
}

.top-bar {
    position: sticky;
    top: 0;
    height: var(--topbar-h);
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0 1.5rem;
    background: var(--bg-sidebar);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 50;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: .4rem;
    border-radius: var(--radius-sm);
    line-height: 0;
}

.menu-toggle:hover {
    color: var(--text-primary);
}

.page-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.top-bar-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.current-date {
    display: flex;
    align-items: center;
    gap: .4rem;
    font-size: .82rem;
    color: var(--text-secondary);
}

.current-date svg,
.current-date i {
    width: 15px;
    height: 15px;
}

.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.theme-toggle:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.theme-toggle svg,
.theme-toggle i {
    width: 16px;
    height: 16px;
}

.content-wrapper {
    padding: 1.5rem;
}

/* ====== CARDS ====== */
.card,
.ots-form {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.25rem;
    transition: all .3s;
}

.card:hover,
.ots-form:hover {
    box-shadow: 0 12px 48px rgba(0, 0, 0, .3);
}

.card-header,
.ots-form h2,
.ots-form h3 {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    gap: 1rem;
}

.ots-form h2,
.ots-form h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: block;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-subtitle {
    font-size: .8rem;
    color: var(--text-muted);
    margin-top: .15rem;
}

/* ====== KPI STATS ====== */
.ots-dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.ots-stat-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    position: relative;
    overflow: hidden;
    transition: all .4s cubic-bezier(.175, .885, .32, 1.275);
}

.ots-stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.ots-stat-card.total::before {
    background: var(--accent-gradient);
}

.ots-stat-card.paid::before {
    background: var(--success);
}

.ots-stat-card.pending::before {
    background: var(--danger);
}

.ots-stat-card.overdue::before {
    background: var(--warning);
}

.ots-stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
}

.ots-stat-card h3 {
    font-size: .72rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .5px;
    margin-bottom: .5rem;
}

.ots-stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
}

.ots-stat-card.pending .ots-stat-number {
    color: var(--danger);
}

.ots-stat-card.paid .ots-stat-number {
    color: var(--success);
}

.ots-stat-card.overdue .ots-stat-number {
    color: var(--warning);
}

.ots-stat-card.total .ots-stat-number {
    color: var(--accent);
}

/* ====== PAGE HEADER ====== */
.ots-header {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-left: 3px solid var(--accent);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    border-radius: var(--radius-lg);
}

.ots-header h1,
.ots-header h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.ots-header .version {
    color: var(--text-muted);
    font-size: .82rem;
    margin-top: .2rem;
}

/* ====== FORMS ====== */
.ots-form-group {
    margin-bottom: 1rem;
}

.ots-form-label {
    display: block;
    font-size: .82rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: .4rem;
}

.ots-form-input,
.ots-form-select,
.ots-form-textarea {
    width: 100%;
    padding: .65rem 1rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: .875rem;
    font-family: inherit;
    transition: all var(--transition);
    outline: none;
    box-sizing: border-box;
}

.ots-form-input::placeholder,
.ots-form-textarea::placeholder {
    color: var(--text-muted);
}

.ots-form-input:focus,
.ots-form-select:focus,
.ots-form-textarea:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.ots-form-textarea {
    min-height: 90px;
    resize: vertical;
}

.ots-form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: .875rem;
    margin-bottom: .25rem;
}

/* Kesin 2 kolon */
.ots-form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: .875rem;
    margin-bottom: .25rem;
}

/* Kesin 3 kolon */
.ots-form-row-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: .875rem;
    margin-bottom: .25rem;
}

@media (max-width: 768px) {
    .ots-form-row-2,
    .ots-form-row-3 {
        grid-template-columns: 1fr;
    }
}

.ots-form-helper {
    font-size: .75rem;
    color: var(--text-muted);
    margin-top: .3rem;
    display: block;
}

.ots-form-checkbox {
    display: flex;
    align-items: center;
    gap: .5rem;
    cursor: pointer;
    font-size: .875rem;
    color: var(--text-secondary);
}

/* ====== BUTTONS ====== */
.ots-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .4rem;
    padding: .55rem 1.1rem;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: .82rem;
    font-weight: 500;
    font-family: inherit;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    line-height: 1.4;
}

.ots-btn:disabled {
    opacity: .5;
    cursor: not-allowed;
}

.ots-btn svg,
.ots-btn i {
    width: 15px;
    height: 15px;
}

.ots-btn-primary {
    background: rgba(255, 255, 255, .1);
    color: var(--text-primary);
    border: 1px solid var(--border-hover);
}

.ots-btn-primary:hover {
    background: rgba(255, 255, 255, .15);
    border-color: rgba(255, 255, 255, .25);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.ots-btn-success {
    background: rgba(16, 185, 129, .12);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, .25);
}

.ots-btn-success:hover {
    background: rgba(16, 185, 129, .2);
    color: var(--success);
    transform: translateY(-1px);
}

.ots-btn-danger {
    background: rgba(239, 68, 68, .12);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, .25);
}

.ots-btn-danger:hover {
    background: rgba(239, 68, 68, .2);
    color: var(--danger);
    transform: translateY(-1px);
}

.ots-btn-warning {
    background: rgba(245, 158, 11, .12);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, .25);
}

.ots-btn-warning:hover {
    background: rgba(245, 158, 11, .2);
    color: var(--warning);
    transform: translateY(-1px);
}

.ots-btn-info {
    background: rgba(59, 130, 246, .12);
    color: var(--info);
    border: 1px solid rgba(59, 130, 246, .25);
}

.ots-btn-info:hover {
    background: rgba(59, 130, 246, .2);
    color: var(--info);
    transform: translateY(-1px);
}

.ots-btn-secondary {
    background: rgba(255, 255, 255, .06);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.ots-btn-secondary:hover {
    background: rgba(255, 255, 255, .1);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

/* ====== TABLE ====== */
.ots-table-container {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 1.25rem;
}

.ots-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .85rem;
}

.ots-table th {
    background: rgba(0, 0, 0, .2);
    padding: .75rem .875rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    font-size: .72rem;
    text-transform: uppercase;
    letter-spacing: .5px;
}

.ots-table td {
    padding: .75rem .875rem;
    border-bottom: 1px solid rgba(255, 255, 255, .04);
    vertical-align: middle;
}

.ots-table tbody tr:last-child td {
    border-bottom: none;
}

.ots-table tbody tr:hover {
    background: rgba(255, 255, 255, .03);
}

.ots-table .actions {
    white-space: nowrap;
}

.ots-table .actions .ots-btn {
    padding: .3rem .6rem;
    font-size: .75rem;
    margin-right: .25rem;
}

/* ====== BADGES ====== */
.ots-status-badge {
    display: inline-block;
    padding: .25rem .7rem;
    border-radius: 20px;
    font-size: .72rem;
    font-weight: 600;
}

.ots-status-odenmedi {
    background: var(--warning-bg);
    color: var(--warning);
}

.ots-status-odendi {
    background: var(--success-bg);
    color: var(--success);
}

.ots-status-gecikmiş {
    background: var(--danger-bg);
    color: var(--danger);
}

.ots-status-iptal {
    background: rgba(255, 255, 255, .06);
    color: var(--text-muted);
}

.ots-status-beklemede {
    background: var(--info-bg);
    color: var(--info);
}

/* Generic badges (rol, etiket, vb.) */
.ots-badge {
    display: inline-block;
    padding: .2rem .6rem;
    border-radius: 12px;
    font-size: .72rem;
    font-weight: 600;
    white-space: nowrap;
}

.ots-badge-success {
    background: var(--success-bg);
    color: var(--success);
}

.ots-badge-info {
    background: var(--info-bg);
    color: var(--info);
}

.ots-badge-warning {
    background: var(--warning-bg);
    color: var(--warning);
}

.ots-badge-danger {
    background: var(--danger-bg);
    color: var(--danger);
}

.ots-badge-muted {
    background: rgba(255, 255, 255, .06);
    color: var(--text-muted);
}

/* ====== FILTER BUTTONS ====== */
.ots-filter-button {
    padding: .4rem 1rem;
    background: rgba(255, 255, 255, .05);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    color: var(--text-muted);
    font-size: .8rem;
    font-family: inherit;
    transition: all var(--transition);
    text-decoration: none;
    display: inline-block;
}

.ots-filter-button:hover {
    border-color: var(--border-hover);
    color: var(--text-primary);
}

.ots-filter-button.active {
    background: rgba(255, 255, 255, .1);
    color: var(--text-primary);
    border-color: var(--border-hover);
    font-weight: 600;
}

/* ====== ALERTS ====== */
.ots-alert {
    padding: .875rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    font-size: .875rem;
    display: flex;
    align-items: center;
    gap: .5rem;
}

.ots-alert-success {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, .25);
}

.ots-alert-error {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, .25);
}

.ots-alert-warning {
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, .25);
}

.ots-alert-info {
    background: var(--info-bg);
    color: var(--info);
    border: 1px solid rgba(59, 130, 246, .25);
}

/* Alias for danger (same as error) */
.ots-alert-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, .25);
}

/* Card wrapper (glass table container) */
.ots-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    margin-bottom: 1.25rem;
    overflow: hidden;
}

/* ====== MODALS ====== */
.ots-modal {
    display: none;
    position: fixed;
    z-index: 9999;
    inset: 0;
    background: rgba(0, 0, 0, .7);
    backdrop-filter: blur(6px);
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.ots-modal.is-open {
    display: flex !important;
}

.ots-modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    animation: modalIn .2s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(.95) translateY(-10px);
    }

    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.ots-modal-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.ots-modal-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.ots-modal-close {
    background: none;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    color: var(--text-muted);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.ots-modal-close:hover {
    background: rgba(255, 255, 255, .08);
    color: var(--text-primary);
}

.ots-modal-body {
    padding: 1.25rem;
    overflow-y: auto;
    flex: 1;
}

.ots-modal-footer {
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: .75rem;
    justify-content: flex-end;
    background: rgba(0, 0, 0, .1);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

/* ====== SPINNER ====== */
.ots-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: .75rem;
    padding: 2.5rem;
    color: var(--text-muted);
    font-size: .875rem;
}

.ots-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin .8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ====== PAGINATION ====== */
.ots-pagination {
    display: flex;
    gap: .4rem;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    margin: 1.25rem 0;
}

/* ====== CHART ====== */
.ots-chart-container,
.chart-container {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.25rem;
}

.ots-chart-container h3 {
    font-size: .95rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.ots-chart-wrapper,
.chart-wrapper {
    position: relative;
    height: 260px;
}

/* ====== FILTERS ROW ====== */
.ots-filters {
    margin-bottom: 1rem;
}

/* ====== SINGLE-LINE TOOLBAR ====== */
.ots-toolbar-row {
    display: flex;
    align-items: center;
    gap: .5rem;
    flex-wrap: nowrap;
    margin-bottom: 1rem;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: .5rem .75rem;
    overflow-x: auto;
}

.ots-toolbar-sep {
    flex: 1;
    min-width: .5rem;
}

@media(max-width:900px) {
    .ots-toolbar-row {
        flex-wrap: wrap;
    }

    .ots-toolbar-sep {
        display: none;
    }
}

/* ====== BULK ACTION BAR ====== */
.bulk-action-bar {
    background: var(--info-bg);
    border: 1px solid rgba(59, 130, 246, .25);
    border-radius: var(--radius-sm);
    padding: .75rem 1rem;
    display: flex;
    align-items: center;
    gap: .75rem;
    margin-bottom: 1rem;
    font-size: .875rem;
    color: var(--info);
    font-weight: 500;
}

/* ====== LIGHT MODE OVERRIDES ====== */
.light-mode .ots-table th {
    background: rgba(0, 0, 0, .04);
}

.light-mode .ots-table tbody tr:hover {
    background: rgba(0, 0, 0, .02);
}

.light-mode .ots-table td {
    border-bottom: 1px solid rgba(0, 0, 0, .05);
}

.light-mode .ots-btn-secondary {
    background: #f8fafc;
    color: #475569;
    border-color: #e2e8f0;
}

.light-mode .ots-btn-secondary:hover {
    background: #f1f5f9;
    color: #0f172a;
}

.light-mode .sidebar {
    border-right-color: rgba(0, 0, 0, .08);
}

.light-mode .nav-item::before {
    background: rgba(255, 77, 41, .06);
}

.light-mode .top-bar {
    background: #ffffff;
    border-bottom-color: rgba(0, 0, 0, .08);
}

.light-mode .ots-form-input,
.light-mode .ots-form-select,
.light-mode .ots-form-textarea {
    border-color: rgba(0, 0, 0, .12);
}

.light-mode .ots-modal-content {
    background: #ffffff;
}

/* ====== RESPONSIVE ====== */
@media(max-width:768px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

    .menu-toggle {
        display: flex;
    }

    .sidebar-close {
        display: flex;
    }

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

    .content-wrapper {
        padding: 1rem;
    }

    .ots-dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .ots-form-row {
        grid-template-columns: 1fr;
    }

    .ots-table-container {
        overflow-x: auto;
    }

    .current-date {
        display: none;
    }
}

/* ====== TOAST ====== */
.ots-toast {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    padding: .875rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: .875rem;
    z-index: 99999;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    animation: toastIn .3s ease;
    max-width: 360px;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ====== SETTINGS TABS ====== */
.ots-settings-tabs {
    display: flex;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    margin-bottom: 1.25rem;
    overflow: hidden;
    backdrop-filter: blur(12px);
}

.ots-tab-link {
    flex: 1;
    padding: .75rem 1rem;
    text-align: center;
    text-decoration: none;
    font-size: .82rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: all var(--transition);
    border-right: 1px solid var(--glass-border);
}

.ots-tab-link:last-child {
    border-right: none;
}

.ots-tab-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, .05);
}

.ots-tab-link.active {
    background: rgba(255, 255, 255, .1);
    color: var(--text-primary);
    font-weight: 600;
    border-bottom: 2px solid var(--accent);
}

/* ====== OTS-WRAP (page container alias) ====== */
.ots-wrap {
    width: 100%;
}

/* ====== LIGHT MODE: Settings tabs ====== */
.light-mode .ots-settings-tabs {
    background: #f8fafc;
    border-color: rgba(0, 0, 0, .08);
}

.light-mode .ots-tab-link {
    color: #64748b;
    border-right-color: rgba(0, 0, 0, .08);
}

.light-mode .ots-tab-link:hover {
    background: rgba(0, 0, 0, .03);
    color: #0f172a;
}

.light-mode .ots-tab-link.active {
    background: #fff;
    color: #0f172a;
}