@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@300;400;500;600;700&family=Sora:wght@400;500;600;700;800&display=swap');

:root {
    /* Fonts */
    --font-heading: 'Sora', sans-serif;
    --font-body: 'DM Sans', sans-serif;

    /* Theme Colors (Warm Obsidian & Muted Petrol) */
    --bg-main: #121316;
    --bg-surface: #191a1e;
    --bg-surface-elevated: #222328;
    
    --color-accent: #4e8a96;
    --color-accent-hover: #5fa0ac;
    --color-accent-rgb: 78, 138, 150;
    
    --text-main: #eae9e4;
    --text-muted: #8e9094;
    
    --border-color: rgba(234, 233, 228, 0.06);
    --border-color-focus: rgba(78, 138, 150, 0.4);
    
    /* Status Colors (Muted & Warm) */
    --color-success: #589a7b;
    --color-success-bg: rgba(88, 154, 123, 0.08);
    --color-success-border: rgba(88, 154, 123, 0.15);
    
    --color-warning: #c8965e;
    --color-warning-bg: rgba(200, 150, 94, 0.08);
    --color-warning-border: rgba(200, 150, 94, 0.15);
    
    --color-danger: #c96e63;
    --color-danger-bg: rgba(201, 110, 99, 0.08);
    --color-danger-border: rgba(201, 110, 99, 0.15);

    /* Spacing Scale */
    --space-xs: 0.25rem;  /* 4px */
    --space-sm: 0.5rem;   /* 8px */
    --space-md: 1rem;     /* 16px */
    --space-lg: 1.5rem;   /* 24px */
    --space-xl: 2rem;     /* 32px */
    --space-2xl: 3rem;    /* 48px */

    /* Border Radius */
    --radius-card: 16px;
    --radius-control: 10px;
    --radius-badge: 20px;
    
    /* Box Shadows */
    --shadow-flat: 0 0 0 1px var(--border-color);
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.25), 0 0 0 1px var(--border-color);
    --shadow-elevated: 0 12px 30px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--border-color);
    --shadow-focus: 0 0 0 3px rgba(78, 138, 150, 0.25);

    /* Hard-coded dark-specific values exposed as variables */
    --form-control-bg: rgba(0, 0, 0, 0.2);
    --card-unavailable-bg: rgba(0, 0, 0, 0.1);
    --card-hover-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
    --sidebar-link-hover-bg: rgba(234, 233, 228, 0.03);
    --sidebar-mobile-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
    --placeholder-color: #55575b;
    --btn-secondary-bg: rgba(234, 233, 228, 0.04);
    --btn-secondary-hover-bg: rgba(234, 233, 228, 0.08);
    --td-divider-color: rgba(234, 233, 228, 0.04);
    --bg-gradient-accent: rgba(78, 138, 150, 0.04);
    --bg-gradient-warm: rgba(200, 150, 94, 0.02);
}

/* ============================================================
   Light Mode Theme
   ============================================================ */
[data-theme="light"] {
    /* Backgrounds */
    --bg-main: #f5f2ee;
    --bg-surface: #fdfaf6;
    --bg-surface-elevated: #ede9e3;

    /* Accent (deepened slightly for contrast on light surfaces) */
    --color-accent: #3a7a87;
    --color-accent-hover: #4e8a96;
    --color-accent-rgb: 58, 122, 135;

    /* Text */
    --text-main: #1e1c1a;
    --text-muted: #6b6560;

    /* Borders */
    --border-color: rgba(30, 28, 26, 0.08);
    --border-color-focus: rgba(58, 122, 135, 0.35);

    /* Status Colors (darkened for readability on light backgrounds) */
    --color-success: #3d7a5e;
    --color-success-bg: rgba(61, 122, 94, 0.10);
    --color-success-border: rgba(61, 122, 94, 0.20);

    --color-warning: #a0723a;
    --color-warning-bg: rgba(160, 114, 58, 0.10);
    --color-warning-border: rgba(160, 114, 58, 0.20);

    --color-danger: #a84e43;
    --color-danger-bg: rgba(168, 78, 67, 0.10);
    --color-danger-border: rgba(168, 78, 67, 0.20);

    /* Shadows (softer on light surfaces) */
    --shadow-flat: 0 0 0 1px var(--border-color);
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.08), 0 0 0 1px var(--border-color);
    --shadow-elevated: 0 12px 30px rgba(0, 0, 0, 0.12), 0 0 0 1px var(--border-color);
    --shadow-focus: 0 0 0 3px rgba(58, 122, 135, 0.22);

    /* Hard-coded dark overrides */
    --form-control-bg: rgba(0, 0, 0, 0.04);
    --card-unavailable-bg: rgba(0, 0, 0, 0.03);
    --card-hover-shadow: 0 16px 40px rgba(0, 0, 0, 0.15);
    --sidebar-link-hover-bg: rgba(30, 28, 26, 0.04);
    --sidebar-mobile-shadow: 0 -4px 12px rgba(0, 0, 0, 0.10);
    --placeholder-color: #a09890;
    --btn-secondary-bg: rgba(30, 28, 26, 0.04);
    --btn-secondary-hover-bg: rgba(30, 28, 26, 0.08);
    --td-divider-color: rgba(30, 28, 26, 0.06);
    --bg-gradient-accent: rgba(58, 122, 135, 0.03);
    --bg-gradient-warm: rgba(200, 150, 94, 0.015);
}

/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-body);
}

body {
    background-color: var(--bg-main);
    background-image: 
        radial-gradient(at 0% 0%, var(--bg-gradient-accent) 0px, transparent 50%),
        radial-gradient(at 100% 100%, var(--bg-gradient-warm) 0px, transparent 50%);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    line-height: 1.5;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-main);
    font-weight: 600;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.75rem;
    margin-bottom: var(--space-xs);
}

p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: var(--space-md);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Accessibility Focus States */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* App Layout */
.top-header {
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-md) var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    height: 65px;
}

.brand {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-icon {
    width: 26px;
    height: 26px;
    flex-shrink: 0;
    color: var(--color-accent);
    display: block;
}

.brand-wordmark {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.35rem;
    letter-spacing: -0.03em;
    color: var(--text-main);
}

.logout-btn {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-danger) !important;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-control);
    transition: background-color 0.2s ease;
}

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

.app-layout {
    display: flex;
    flex-grow: 1;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    align-self: center;
}

/* Sidebar Navigation */
.sidebar {
    width: 250px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-card);
    margin: var(--space-lg) 0 var(--space-lg) var(--space-lg);
    padding: var(--space-lg) var(--space-sm);
    height: calc(100vh - 65px - (var(--space-lg) * 2));
    position: sticky;
    top: calc(65px + var(--space-lg));
    flex-shrink: 0;
    box-shadow: var(--shadow-soft);
}

.sidebar-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.sidebar-link {
    display: flex;
    align-items: center;
    padding: 0.75rem var(--space-md);
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    border-radius: var(--radius-control);
    transition: all 0.2s ease;
}

.sidebar-link:hover {
    background: var(--sidebar-link-hover-bg);
    color: var(--text-main);
}

.sidebar-link.active {
    background: rgba(78, 138, 150, 0.08);
    color: var(--text-main);
    font-weight: 600;
}

/* Main Content Area */
.main-content {
    flex-grow: 1;
    padding: var(--space-lg);
    overflow-y: auto;
}

.main-content-full {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
}

/* Cards & Panels (Spatial Depth Tiles) */
.glass-panel, .card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-card);
    padding: var(--space-lg);
    box-shadow: var(--shadow-soft);
    margin-bottom: var(--space-lg);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

/* Room Availability Card Layout - Tactile Spatial Depth */
.card-available {
    box-shadow: var(--shadow-elevated);
    border-color: rgba(78, 138, 150, 0.15);
}

.card-available:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-hover-shadow);
}

.card-unavailable {
    box-shadow: none;
    background: var(--card-unavailable-bg);
    opacity: 0.75;
}

.card h3, .glass-panel h3 {
    margin-bottom: var(--space-md);
    font-size: 1.25rem;
    font-family: var(--font-heading);
}

/* Dashboard Grid & Cards */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.card-title {
    font-size: 0.85rem;
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.card-value {
    font-size: 2.25rem;
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-main);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-control);
    font-weight: 600;
    font-size: 0.95rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    touch-action: manipulation;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--text-main);
    box-shadow: 0 4px 12px rgba(78, 138, 150, 0.2);
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(78, 138, 150, 0.3);
}

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

.btn-danger:hover {
    background: rgba(201, 110, 99, 0.15);
}

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

.btn-success:hover {
    background: rgba(88, 154, 123, 0.15);
}

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

.btn-warning:hover {
    background: rgba(200, 150, 94, 0.15);
}

.btn-secondary {
    background: var(--btn-secondary-bg);
    color: var(--text-main);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    background: var(--btn-secondary-hover-bg);
}

/* Forms */
.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-xs);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    min-height: 44px;
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-control);
    background: var(--form-control-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 1rem; /* 16px prevents iOS Safari auto-zoom */
    font-family: var(--font-body);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.3s ease;
}

.form-control::placeholder {
    color: var(--placeholder-color);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: var(--shadow-focus);
}

/* Navigation Icons */
.sidebar-link-icon {
    display: none;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-right: var(--space-sm);
}

.sidebar-link-icon svg {
    width: 100%;
    height: 100%;
    display: block;
    fill: currentColor;
}

/* Grid-based Floating Row Tables (Desktop / Tablet) */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

table {
    display: flex;
    flex-direction: column;
    width: 100%;
    border-collapse: collapse;
    gap: var(--space-sm);
}

thead {
    display: block;
}

thead tr {
    display: grid;
    padding: 0 var(--space-lg);
    width: 100%;
}

th {
    padding: var(--space-sm) 0;
    font-family: var(--font-heading);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    border: none;
    text-align: left;
}

tbody {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    width: 100%;
}

tbody tr {
    display: grid;
    align-items: center;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-control);
    padding: var(--space-md) var(--space-lg);
    box-shadow: var(--shadow-flat);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

tbody tr:hover {
    background: var(--bg-surface-elevated);
    transform: translateY(-2px);
    box-shadow: var(--shadow-soft);
    border-color: var(--border-color-focus);
}

td {
    padding: 0;
    border: none;
    color: var(--text-main);
    font-size: 0.95rem;
    min-width: 0;
    word-break: break-word;
}

/* Specific Grid Columns for Table Alignment (Desktop) */
.cols-3 tr {
    grid-template-columns: 2fr 1fr 1.5fr;
}

.cols-4 tr {
    grid-template-columns: 1.5fr 1.25fr 1.5fr 1fr;
}

.cols-5 tr {
    grid-template-columns: 1.5fr 1.5fr 1fr 1.25fr 1.25fr;
}

.cols-6 tr {
    grid-template-columns: 0.6fr 1.4fr 1fr 1.25fr 1.25fr 0.9fr;
}

.cols-rooms tr {
    grid-template-columns: 1.2fr 1.2fr 0.8fr 0.8fr 1fr;
}

.cols-manage-bookings tr {
    grid-template-columns: 0.5fr 1.3fr 1fr 1.2fr 0.9fr 1.4fr;
}

.cols-admin-logs tr {
    grid-template-columns: 1fr 0.8fr 1.2fr 1.2fr 1fr;
}

.cols-conflict-logs tr {
    grid-template-columns: 1fr 1fr 1.2fr 1.4fr 1fr;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.2rem 0.75rem;
    border-radius: var(--radius-badge);
    font-size: 0.8rem;
    font-weight: 600;
    border: 1px solid transparent;
}

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

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

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

/* Alerts */
.alert {
    padding: var(--space-md);
    border-radius: var(--radius-control);
    margin-bottom: var(--space-lg);
    border: 1px solid transparent;
    font-size: 0.95rem;
}

.alert-danger {
    background: var(--color-danger-bg);
    border-color: var(--color-danger-border);
    color: var(--color-danger);
}

.alert-success {
    background: var(--color-success-bg);
    border-color: var(--color-success-border);
    color: var(--color-success);
}

/* Login Wrapper & Authentication Pages */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    width: 100%;
}

.login-box {
    width: 100%;
    max-width: 420px;
    margin: var(--space-md);
    padding: var(--space-2xl) var(--space-xl);
}

/* Responsive Media Queries */
/* ---- DESKTOP: ensure sidebar position is always static (reset any mobile overrides) ---- */
@media (min-width: 768px) {
    .sidebar {
        position: sticky;
        top: calc(65px + var(--space-lg));
        bottom: auto;
        left: auto;
        right: auto;
        width: 250px;
        height: calc(100vh - 65px - (var(--space-lg) * 2));
    }

    .sidebar-links {
        flex-direction: column;
        gap: var(--space-xs);
        height: auto;
    }

    .sidebar-link {
        flex-direction: row;
        padding: 0.75rem var(--space-md);
        font-size: 0.95rem;
        gap: 0;
        border-radius: var(--radius-control);
        min-height: unset;
    }

    .sidebar-link-icon {
        display: none; /* Desktop: icons hidden, text only */
        margin-right: var(--space-sm);
        width: 20px;
        height: 20px;
    }
}

@media (max-width: 767px) {
    .top-header {
        padding: var(--space-sm) var(--space-md);
        height: 58px;
    }
    
    .brand {
        font-size: 1.1rem;
        gap: 8px;
    }

    .brand-icon {
        width: 22px;
        height: 22px;
    }

    .brand-wordmark {
        font-size: 1.1rem;
    }

    .brand .badge-role {
        font-size: 0.68rem;
        padding: 0.1rem 0.45rem;
    }

    .logout-btn {
        font-size: 0.8rem;
        padding: 0.35rem 0.65rem;
        max-width: 170px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    
    .app-layout {
        flex-direction: column;
    }
    
    /* ---- MOBILE BOTTOM NAV ---- */
    .sidebar {
        position: fixed !important;
        bottom: 0 !important;
        left: 0 !important;
        right: 0 !important;
        top: auto !important;
        width: 100% !important;
        height: calc(60px + env(safe-area-inset-bottom, 0px)) !important;
        margin: 0 !important;
        border-radius: 0 !important;
        border-top: 1px solid var(--border-color) !important;
        border-left: none !important;
        border-right: none !important;
        border-bottom: none !important;
        padding: 4px 4px env(safe-area-inset-bottom, 0px) 4px !important;
        z-index: 1000 !important;
        background: var(--bg-surface) !important;
        box-shadow: var(--sidebar-mobile-shadow) !important;
        backdrop-filter: blur(12px);
    }
    
    .sidebar-links {
        flex-direction: row !important;
        justify-content: space-around !important;
        align-items: stretch !important;
        height: 60px !important;
        gap: 2px !important;
    }
    
    .sidebar-link {
        padding: 4px 6px !important;
        font-size: 0.68rem !important;
        flex-direction: column !important;
        align-items: center !important;
        justify-content: center !important;
        gap: 3px !important;
        border-radius: 10px !important;
        text-align: center !important;
        flex: 1 !important;
        min-width: 0 !important;
        min-height: 52px !important;
        color: var(--text-muted);
        transition: color 0.15s ease, background-color 0.15s ease;
    }

    /* Icons: always visible on mobile */
    .sidebar-link-icon {
        display: flex !important;
        align-items: center;
        justify-content: center;
        margin-right: 0 !important;
        width: 22px !important;
        height: 22px !important;
        flex-shrink: 0;
    }

    .sidebar-link-icon svg {
        width: 100% !important;
        height: 100% !important;
    }

    .sidebar-link > span:not(.sidebar-link-icon) {
        display: block !important;
        max-width: 100% !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
        white-space: nowrap !important;
        font-size: 0.65rem !important;
        font-weight: 500 !important;
        line-height: 1;
    }
    
    /* Active state: accent background pill */
    .sidebar-link.active {
        background: rgba(var(--color-accent-rgb), 0.12) !important;
        color: var(--color-accent) !important;
        font-weight: 600 !important;
    }

    .sidebar-link:not(.active):hover {
        background: rgba(var(--color-accent-rgb), 0.06) !important;
        color: var(--text-main) !important;
    }
    
    /* Ensure main content clears the bottom nav bar */
    .main-content {
        padding: var(--space-md) !important;
        padding-bottom: calc(76px + env(safe-area-inset-bottom, 0px)) !important;
    }

    .dashboard-grid,
    .rooms-layout-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
}

/* Mobile Card-Stacked Tables & Small Device UX (< 600px) */
@media (max-width: 600px) {
    .table-responsive {
        overflow-x: visible;
        width: 100%;
    }
    
    table, 
    .cols-3, 
    .cols-4, 
    .cols-5, 
    .cols-6, 
    .cols-rooms, 
    .cols-manage-bookings, 
    .cols-admin-logs, 
    .cols-conflict-logs {
        display: flex !important;
        flex-direction: column !important;
        width: 100% !important;
        min-width: 0 !important;
        gap: var(--space-md) !important;
    }
    
    thead {
        display: none !important;
    }
    
    tbody {
        display: flex !important;
        flex-direction: column !important;
        width: 100% !important;
        gap: var(--space-md) !important;
    }
    
    tbody tr {
        display: flex !important;
        flex-direction: column !important;
        width: 100% !important;
        padding: var(--space-md) !important;
        background: var(--bg-surface) !important;
        border: 1px solid var(--border-color) !important;
        border-radius: var(--radius-card) !important;
        box-shadow: var(--shadow-soft) !important;
        gap: var(--space-xs) !important;
        transform: none !important;
    }
    
    tbody tr:hover {
        transform: none !important;
        background: var(--bg-surface) !important;
    }
    
    td {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        width: 100% !important;
        padding: var(--space-xs) 0 !important;
        border-bottom: 1px solid var(--td-divider-color) !important;
        font-size: 0.9rem !important;
        text-align: right !important;
    }
    
    td::before {
        content: attr(data-label);
        font-family: var(--font-heading);
        font-weight: 600;
        font-size: 0.72rem;
        text-transform: uppercase;
        letter-spacing: 0.05em;
        color: var(--text-muted);
        text-align: left;
        margin-right: var(--space-md);
        flex-shrink: 0;
    }
    
    td:last-child {
        border-bottom: none !important;
        padding-top: var(--space-sm) !important;
    }
    
    td[data-label="Action"] {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: var(--space-xs) !important;
        padding-top: var(--space-sm) !important;
    }
    
    td[data-label="Action"]::before {
        align-self: flex-start !important;
        margin-bottom: var(--space-xs) !important;
    }
    
    td[data-label="Action"] .flex-gap-xs {
        width: 100%;
        display: flex;
        gap: var(--space-sm);
    }
    
    td[data-label="Action"] .btn {
        flex: 1;
        min-height: 42px;
        font-size: 0.85rem;
    }
    
    td[data-label="Action"] .remarks-input {
        flex: 2 !important;
        width: auto !important;
        min-height: 42px !important;
    }
    
    .table-empty-row {
        padding: var(--space-xl) var(--space-md) !important;
        display: flex !important;
        justify-content: center !important;
        align-items: center !important;
    }
    
    .table-empty-cell {
        display: block !important;
        text-align: center !important;
        width: 100% !important;
        border-bottom: none !important;
    }
    
    .table-empty-cell::before {
        content: none !important;
    }

    /* Form & Viewport Fixes */
    .flex-gap-md {
        flex-direction: column !important;
        gap: var(--space-md) !important;
    }
    
    .align-end {
        align-items: stretch !important;
    }
    
    .login-box {
        margin: var(--space-sm);
        padding: var(--space-xl) var(--space-md);
    }
    
    .container {
        padding: 0;
    }
    
    h2 {
        font-size: 1.4rem;
    }
    
    .card-value {
        font-size: 1.85rem;
    }
}

/* Helper Utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.w-100 { width: 100%; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.card-actions {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--space-md);
}
.btn-sm {
    padding: 0.45rem 1rem;
    font-size: 0.8rem;
}
.flex-column {
    display: flex;
    flex-direction: column;
}
.gap-sm {
    gap: var(--space-sm);
}
.gap-md {
    gap: var(--space-md);
}
.font-sm {
    font-size: 0.85rem;
}
.font-xs {
    font-size: 0.8rem;
}
.text-bold {
    font-weight: 600;
}
.flex-between-center {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.inline-block {
    display: inline-block;
}
.flex-gap-md {
    display: flex;
    gap: var(--space-md);
}
.flex-1 {
    flex: 1;
}
.max-width-600 {
    max-width: 600px;
}
.max-width-500 {
    max-width: 500px;
}
.mx-auto {
    margin-left: auto;
    margin-right: auto;
}
.align-end {
    align-items: flex-end;
}
.no-margin {
    margin: 0 !important;
}
.flex-grow-1 {
    flex-grow: 1;
}
.card-divider {
    border-top: 1px solid var(--border-color);
    padding-top: var(--space-md);
    margin-top: var(--space-md);
}
ul.list-unstyled {
    list-style: none;
    padding-left: 0;
}
.text-success {
    color: var(--color-success) !important;
}
.text-warning {
    color: var(--color-warning) !important;
}
.text-danger {
    color: var(--color-danger) !important;
}
.text-muted-alt {
    color: var(--text-muted) !important;
}
.mb-xs {
    margin-bottom: var(--space-xs) !important;
}
.flex-gap-xs {
    display: flex;
    gap: var(--space-xs);
}
.rooms-layout-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}
.table-empty-row {
    display: flex !important;
    justify-content: center !important;
    padding: var(--space-lg) !important;
    width: 100%;
}
.table-empty-cell {
    text-align: center;
    color: var(--text-muted);
}
.badge-role {
    background: rgba(var(--color-accent-rgb), 0.15);
    color: var(--color-accent-hover);
    border: 1px solid rgba(var(--color-accent-rgb), 0.30);
    font-size: 0.75rem;
    padding: 0.15rem 0.55rem;
    border-radius: var(--radius-badge);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.mt-xs { margin-top: var(--space-xs); }
.gap-xs { gap: var(--space-xs); }
.gap-lg { gap: var(--space-lg); }
.font-md { font-size: 1rem; }

/* ============================================================
   Header Right & Theme Toggle
   ============================================================ */
.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-control);
    cursor: pointer;
    color: var(--text-muted);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    flex-shrink: 0;
    padding: 0;
}

.theme-toggle:hover {
    background: rgba(var(--color-accent-rgb), 0.08);
    color: var(--color-accent);
    border-color: var(--border-color-focus);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

/* Dark mode: show sun icon (click to switch to light) */
.icon-sun { display: block; }
.icon-moon { display: none; }

/* Light mode: show moon icon (click to switch to dark) */
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

/* Smooth transition for top-header & sidebar on theme change */
.top-header,
.sidebar {
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}