/* =============================================================================
   Property Management System — Main Stylesheet
   Mobile-first. No framework. Custom properties throughout.
   ============================================================================= */

/* ---------------------------------------------------------------------------
   Custom Properties (Design Tokens)
   --------------------------------------------------------------------------- */
:root {
    /* Brand */
    --color-primary:       #1e40af;
    --color-primary-light: #3b82f6;
    --color-primary-dark:  #1e3a8a;

    /* Neutrals */
    --color-white:   #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100:#f1f5f9;
    --color-gray-200:#e2e8f0;
    --color-gray-300:#cbd5e1;
    --color-gray-400:#94a3b8;
    --color-gray-500:#64748b;
    --color-gray-600:#475569;
    --color-gray-700:#334155;
    --color-gray-800:#1e293b;
    --color-gray-900:#0f172a;

    /* Status colours (per CLAUDE.md) */
    --color-available:   #16a34a;
    --color-reserved:    #2563eb;
    --color-checked-in:  #ea580c;
    --color-checked-out: #6b7280;
    --color-cancelled:   #dc2626;
    --color-maintenance: #374151;
    --color-pending:     #ca8a04;

    /* Semantic */
    --color-success: #16a34a;
    --color-error:   #dc2626;
    --color-warning: #ca8a04;
    --color-info:    #2563eb;

    /* Typography */
    --font-family:  system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl:1.5rem;
    --font-size-3xl:1.875rem;

    /* Spacing */
    --space-1:  0.25rem;
    --space-2:  0.5rem;
    --space-3:  0.75rem;
    --space-4:  1rem;
    --space-5:  1.25rem;
    --space-6:  1.5rem;
    --space-8:  2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* Layout */
    --sidebar-width:     260px;
    --topbar-height:     60px;
    --sidebar-collapsed: 0px;

    /* Borders */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm:  0 1px 2px rgba(0,0,0,.05);
    --shadow-md:  0 4px 6px rgba(0,0,0,.07);
    --shadow-lg:  0 10px 15px rgba(0,0,0,.1);
    --shadow-xl:  0 20px 25px rgba(0,0,0,.12);

    /* Transitions */
    --transition-fast:   150ms ease;
    --transition-normal: 250ms ease;
}

/* ---------------------------------------------------------------------------
   Reset & Base
   --------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: var(--font-family);
    font-size:   var(--font-size-md);
    color:       var(--color-gray-800);
    background:  var(--color-gray-50);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

img { max-width: 100%; display: block; }

ul, ol { list-style: none; }

button { cursor: pointer; font-family: inherit; }

input, select, textarea, button { font-family: inherit; font-size: inherit; }

/* ---------------------------------------------------------------------------
   Auth Layout
   --------------------------------------------------------------------------- */
.auth-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    padding: var(--space-4);
}

.auth-wrapper {
    width: 100%;
    max-width: 420px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
}

.auth-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    width: 100%;
    box-shadow: var(--shadow-xl);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-8);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
}

.auth-logo { margin-bottom: var(--space-2); }

.auth-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
    line-height: 1.2;
}

.auth-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.auth-form { display: flex; flex-direction: column; gap: var(--space-5); }

.auth-footer {
    font-size: var(--font-size-xs);
    color: rgba(255,255,255,0.7);
    text-align: center;
}

/* ---------------------------------------------------------------------------
   App Layout (authenticated)
   --------------------------------------------------------------------------- */
.app-body {
    min-height: 100vh;
    background: var(--color-gray-100);
}

.app-layout {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left var(--transition-normal);
}

/* ---------------------------------------------------------------------------
   Sidebar
   --------------------------------------------------------------------------- */
.sidebar {
    position: fixed;
    top: 0; left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--color-gray-900);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transform: translateX(0);
    transition: transform var(--transition-normal);
    overflow-y: auto;
}

.sidebar__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid rgba(255,255,255,.08);
    flex-shrink: 0;
}

.sidebar__brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-white);
    font-weight: 700;
    font-size: var(--font-size-sm);
    text-decoration: none;
    min-width: 0;
}

.sidebar__brand-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar__close {
    display: none;
    background: none;
    border: none;
    color: var(--color-gray-400);
    font-size: var(--font-size-lg);
    padding: var(--space-1);
    border-radius: var(--radius-sm);
}

.sidebar__nav { flex: 1; padding: var(--space-3) 0; }

.sidebar__list { display: flex; flex-direction: column; gap: 2px; }

.sidebar__item { padding: 0 var(--space-3); }

.sidebar__link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-3);
    border-radius: var(--radius-md);
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.sidebar__link:hover {
    background: rgba(255,255,255,.06);
    color: var(--color-white);
    text-decoration: none;
}

.sidebar__link--active {
    background: var(--color-primary);
    color: var(--color-white);
}

.sidebar__icon { font-size: var(--font-size-md); width: 20px; text-align: center; flex-shrink: 0; }
.sidebar__label { white-space: nowrap; }

.sidebar__footer {
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid rgba(255,255,255,.08);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
}

.sidebar__user { flex: 1; display: flex; align-items: center; gap: var(--space-3); min-width: 0; }

.sidebar__user-avatar {
    width: 34px; height: 34px;
    border-radius: var(--radius-full);
    background: var(--color-primary);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar__user-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.sidebar__user-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-white);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar__user-role {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
}

.sidebar__logout-form { flex-shrink: 0; }

.sidebar__logout {
    background: none;
    border: none;
    color: var(--color-gray-400);
    font-size: var(--font-size-xs);
    padding: var(--space-2);
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast);
}

.sidebar__logout:hover { color: var(--color-error); }

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 99;
}

/* ---------------------------------------------------------------------------
   Top Bar
   --------------------------------------------------------------------------- */
.topbar {
    height: var(--topbar-height);
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    display: flex;
    align-items: center;
    padding: 0 var(--space-6);
    gap: var(--space-4);
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: var(--shadow-sm);
}

.topbar__menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    padding: var(--space-2);
    border-radius: var(--radius-sm);
}

.hamburger {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-gray-600);
    border-radius: 2px;
    transition: background var(--transition-fast);
}

.topbar__title {
    flex: 1;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-gray-800);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.topbar__right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-shrink: 0;
}

.topbar__user {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    display: none;
}

/* ---------------------------------------------------------------------------
   Main Content
   --------------------------------------------------------------------------- */
.main-content {
    flex: 1;
    padding: var(--space-6);
    max-width: 100%;
    overflow-x: hidden;
}

.flash-container { padding: 0 var(--space-6); }

/* ---------------------------------------------------------------------------
   Offline Bar
   --------------------------------------------------------------------------- */
.offline-bar {
    background: var(--color-warning);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: 500;
    position: sticky;
    top: 0;
    z-index: 200;
}

.offline-bar__icon { font-size: var(--font-size-lg); }

/* ---------------------------------------------------------------------------
   Alerts / Flash
   --------------------------------------------------------------------------- */
.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-left: 4px solid transparent;
}

.alert--success { background: #dcfce7; border-color: var(--color-success); color: #14532d; }
.alert--error   { background: #fee2e2; border-color: var(--color-error);   color: #7f1d1d; }
.alert--warning { background: #fef9c3; border-color: var(--color-warning); color: #713f12; }
.alert--info    { background: #dbeafe; border-color: var(--color-info);    color: #1e3a8a; }

.alert__icon { font-size: var(--font-size-md); flex-shrink: 0; }
.alert__message { flex: 1; }

/* ---------------------------------------------------------------------------
   Buttons
   --------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    line-height: 1;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

.btn--primary {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}
.btn--primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    text-decoration: none;
    color: var(--color-white);
}

.btn--secondary {
    background: var(--color-white);
    color: var(--color-gray-700);
    border-color: var(--color-gray-300);
}
.btn--secondary:hover {
    background: var(--color-gray-100);
    text-decoration: none;
}

.btn--danger {
    background: var(--color-error);
    color: var(--color-white);
    border-color: var(--color-error);
}
.btn--danger:hover { background: #b91c1c; border-color: #b91c1c; text-decoration: none; color: var(--color-white); }

.btn--ghost {
    background: transparent;
    color: var(--color-gray-600);
    border-color: transparent;
}
.btn--ghost:hover { background: var(--color-gray-100); text-decoration: none; }

.btn--sm   { padding: var(--space-2) var(--space-3); font-size: var(--font-size-xs); }
.btn--lg   { padding: var(--space-4) var(--space-6); font-size: var(--font-size-md); }
.btn--full { width: 100%; }

/* ---------------------------------------------------------------------------
   Forms
   --------------------------------------------------------------------------- */
.form-group { display: flex; flex-direction: column; gap: var(--space-2); }

.form-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-700);
}

.form-label--required::after {
    content: ' *';
    color: var(--color-error);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-md);
    color: var(--color-gray-800);
    background: var(--color-white);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    appearance: none;
    -webkit-appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30,64,175,.15);
}

.form-input::placeholder { color: var(--color-gray-400); }

.form-textarea { resize: vertical; min-height: 100px; }

.form-hint {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
}

.form-error {
    font-size: var(--font-size-xs);
    color: var(--color-error);
    font-weight: 500;
}

.input-wrapper { position: relative; }

.input-toggle-password {
    position: absolute;
    right: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--color-gray-400);
    cursor: pointer;
    padding: var(--space-1);
    display: flex;
    align-items: center;
}

.input-toggle-password:hover { color: var(--color-gray-700); }

/* ---------------------------------------------------------------------------
   Status Badges
   --------------------------------------------------------------------------- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 700;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.badge--green       { background: #dcfce7; color: #14532d; }
.badge--blue        { background: #dbeafe; color: #1e3a8a; }
.badge--orange      { background: #ffedd5; color: #7c2d12; }
.badge--gray        { background: var(--color-gray-100); color: var(--color-gray-600); }
.badge--red         { background: #fee2e2; color: #7f1d1d; }
.badge--dark-gray   { background: var(--color-gray-700); color: var(--color-white); }
.badge--yellow      { background: #fef9c3; color: #713f12; }

/* ---------------------------------------------------------------------------
   Cards
   --------------------------------------------------------------------------- */
.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    overflow: hidden;
}

.card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--color-gray-200);
    gap: var(--space-4);
}

.card__title {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--color-gray-800);
}

.card__body { padding: var(--space-6); }

/* ---------------------------------------------------------------------------
   Tables
   --------------------------------------------------------------------------- */
/* Horizontal scroll for wide tables (both wrapper class names used in views) */
.table-wrapper,
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.table th {
    text-align: left;
    padding: var(--space-3) var(--space-4);
    font-weight: 600;
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-500);
    background: var(--color-gray-50);
    border-bottom: 2px solid var(--color-gray-200);
    white-space: nowrap;
}

.table td {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-gray-100);
    color: var(--color-gray-700);
    vertical-align: middle;
}

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

.table tr:hover td { background: var(--color-gray-50); }

/* ---------------------------------------------------------------------------
   KPI Cards (Dashboard)
   --------------------------------------------------------------------------- */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.kpi-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    border: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
}

.kpi-card__label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-500);
    margin-bottom: var(--space-2);
}

.kpi-card__value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-gray-900);
    line-height: 1;
}

.kpi-card__sub {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    margin-top: var(--space-1);
}

/* ---------------------------------------------------------------------------
   Page Header
   --------------------------------------------------------------------------- */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
    gap: var(--space-4);
    flex-wrap: wrap;
}

.page-header__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
}

.page-header__sub {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-top: var(--space-1);
}

/* ---------------------------------------------------------------------------
   Filters bar
   --------------------------------------------------------------------------- */
.filters-bar {
    display: flex;
    align-items: flex-end;
    gap: var(--space-3);
    flex-wrap: wrap;
    margin-bottom: var(--space-5);
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
}

.filters-bar .form-group { min-width: 160px; flex: 1; }

/* ---------------------------------------------------------------------------
   Utilities
   --------------------------------------------------------------------------- */
.text-right  { text-align: right; }
.text-center { text-align: center; }
.text-muted  { color: var(--color-gray-500); }
.text-sm     { font-size: var(--font-size-sm); }
.font-bold   { font-weight: 700; }
.mt-4        { margin-top: var(--space-4); }
.mt-6        { margin-top: var(--space-6); }
.mb-4        { margin-bottom: var(--space-4); }
.flex        { display: flex; }
.items-center{ align-items: center; }
.gap-3       { gap: var(--space-3); }
.w-full      { width: 100%; }

/* Empty state */
.empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-8);
    color: var(--color-gray-500);
}

.empty-state__icon  { font-size: 3rem; margin-bottom: var(--space-4); }
.empty-state__title { font-size: var(--font-size-lg); font-weight: 600; color: var(--color-gray-700); margin-bottom: var(--space-2); }
.empty-state__text  { font-size: var(--font-size-sm); }

/* ---------------------------------------------------------------------------
   Responsive — Mobile (≤ 768px)
   --------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(calc(-1 * var(--sidebar-width)));
    }

    .sidebar--open {
        transform: translateX(0);
        box-shadow: var(--shadow-xl);
    }

    .sidebar__close { display: block; }

    .sidebar-overlay--visible {
        display: block;
    }

    .app-layout {
        margin-left: 0;
    }

    .topbar__menu-btn {
        display: flex;
    }

    .topbar { padding: 0 var(--space-4); }

    .main-content { padding: var(--space-4); }

    .flash-container { padding: 0 var(--space-4); }

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

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .topbar__user { display: none; }

    .auth-card { padding: var(--space-6); }

    .table th, .table td { padding: var(--space-3); white-space: nowrap; }

    /* Universal mobile fix: make EVERY table its own horizontal-scroll
       container — works even for tables not wrapped in .table-responsive
       (e.g. dashboard stats tables) so wide tables scroll instead of clipping. */
    .table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .kpi-grid {
        grid-template-columns: 1fr;
    }
}

/* ---------------------------------------------------------------------------
   Print styles
   --------------------------------------------------------------------------- */
@media print {
    .sidebar, .topbar, .offline-bar, .sidebar-overlay,
    .btn, .filters-bar, .flash-container { display: none !important; }
    .app-layout { margin-left: 0; }
    .main-content { padding: 0; }
}

/* ---------------------------------------------------------------------------
   PWA — SW update banner
   --------------------------------------------------------------------------- */
.sw-update-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-5);
    background: var(--color-primary);
    color: var(--color-white);
    font-size: var(--font-size-sm);
    box-shadow: 0 -2px 8px rgba(0,0,0,0.2);
}

.sw-update-banner__btn {
    padding: var(--space-1) var(--space-3);
    background: var(--color-white);
    color: var(--color-primary);
    border: none;
    border-radius: 4px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
}

.sw-update-banner__btn:hover {
    background: var(--color-gray-100);
}

.sw-update-banner__dismiss {
    margin-left: auto;
    background: transparent;
    border: none;
    color: var(--color-white);
    font-size: var(--font-size-lg);
    cursor: pointer;
    line-height: 1;
    padding: 0 var(--space-1);
    opacity: 0.8;
}

.sw-update-banner__dismiss:hover {
    opacity: 1;
}

/* ---------------------------------------------------------------------------
   Utility — hidden (used by PWA install button and other JS-toggled elements)
   --------------------------------------------------------------------------- */
.hidden {
    display: none !important;
}