/* ============================================================
   CompareHub — Design System
   ============================================================ */

:root {
    --sidebar-width: 260px;
    --navbar-height: 60px;

    /* Brand Palette */
    --ch-primary: #4f46e5;
    --ch-primary-hover: #4338ca;
    --ch-primary-rgb: 79, 70, 229;
    --ch-secondary: #0ea5e9;
    --ch-secondary-rgb: 14, 165, 233;
    --ch-success: #10b981;
    --ch-success-rgb: 16, 185, 129;
    --ch-warning: #f59e0b;
    --ch-warning-rgb: 245, 158, 11;
    --ch-danger: #ef4444;
    --ch-danger-rgb: 239, 68, 68;
    --ch-info: #06b6d4;

    /* Surfaces — Light Mode */
    --bs-body-bg: #f8fafc;
    --bs-body-color: #1e293b;
    --bs-secondary-color: #64748b;
    --bs-tertiary-bg: #f1f5f9;
    --card-bg: #ffffff;
    --card-border: rgba(0, 0, 0, 0.06);
    --input-bg: #ffffff;
    --input-border: #cbd5e1;

    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(0, 0, 0, 0.06);

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
    --shadow-lg: 0 12px 28px rgba(0,0,0,0.10);
}

[data-bs-theme="dark"] {
    --bs-body-bg: #0f172a;
    --bs-body-color: #e2e8f0;
    --bs-secondary-color: #94a3b8;
    --bs-tertiary-bg: #1e293b;
    --card-bg: #1e293b;
    --card-border: rgba(255, 255, 255, 0.06);
    --input-bg: #1e293b;
    --input-border: #334155;

    --glass-bg: rgba(15, 23, 42, 0.8);
    --glass-border: rgba(255, 255, 255, 0.08);

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
    --shadow-lg: 0 12px 28px rgba(0,0,0,0.4);

    --ch-primary: #818cf8;
    --ch-primary-hover: #a5b4fc;
    --ch-primary-rgb: 129, 140, 248;
}


/* ============================================================
   Base
   ============================================================ */

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bs-body-bg);
    color: var(--bs-body-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}


/* ============================================================
   Navbar — Glassmorphism
   ============================================================ */

.navbar {
    height: var(--navbar-height);
    background: var(--glass-bg) !important;
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    padding: 0 1rem;
    z-index: 1030;
    transition: background 0.3s ease, border-color 0.3s ease;
}

.navbar-brand {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--bs-body-color) !important;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand i {
    font-size: 1.3rem;
    background: linear-gradient(135deg, var(--ch-primary), var(--ch-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar .btn-link {
    color: var(--bs-body-color) !important;
    text-decoration: none;
}

.navbar .btn-outline-light,
.navbar .btn-sm.btn-outline-light {
    color: var(--bs-body-color);
    border-color: var(--glass-border);
    border-radius: 0.5rem;
    padding: 0.35rem 0.7rem;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.navbar .btn-outline-light:hover,
.navbar .btn-sm.btn-outline-light:hover {
    background: rgba(var(--ch-primary-rgb), 0.08);
    border-color: rgba(var(--ch-primary-rgb), 0.3);
    color: var(--ch-primary);
}


/* ============================================================
   Layout — Sidebar + Main (Flexbox, no double offset!)
   ============================================================ */

.app-wrapper {
    display: flex;
    min-height: calc(100vh - var(--navbar-height));
}

.sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    min-height: calc(100vh - var(--navbar-height));
    background: var(--glass-bg);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-right: 1px solid var(--glass-border);
    overflow-y: auto;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), background 0.3s ease;

    /* Mobile: off-screen */
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    bottom: 0;
    z-index: 1020;
    transform: translateX(-100%);
}

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

@media (min-width: 992px) {
    .sidebar {
        position: sticky;
        top: var(--navbar-height);
        height: calc(100vh - var(--navbar-height));
        transform: translateX(0);
    }
}

/* Main content fills the remaining flex space — NO margin-left needed */
.main-content {
    flex: 1;
    min-width: 0;                     /* prevent flex overflow */
    min-height: calc(100vh - var(--navbar-height));
    padding: 1.5rem;
}

@media (min-width: 992px) {
    .main-content {
        padding: 2rem 2.5rem;
    }
}


/* ============================================================
   Sidebar Navigation
   ============================================================ */

.sidebar .nav-link {
    color: var(--bs-body-color);
    border-radius: 0.5rem;
    padding: 0.55rem 0.85rem;
    margin-bottom: 2px;
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    transition: all 0.2s ease;
}

.sidebar .nav-link i {
    font-size: 1.1rem;
    width: 1.25rem;
    text-align: center;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.sidebar .nav-link:hover {
    background: rgba(var(--ch-primary-rgb), 0.08);
    color: var(--ch-primary);
    transform: translateX(3px);
}

.sidebar .nav-link:hover i {
    opacity: 1;
}

.sidebar .nav-link.active {
    background: rgba(var(--ch-primary-rgb), 0.12);
    color: var(--ch-primary);
    font-weight: 600;
}

.sidebar hr {
    opacity: 0.08;
    margin: 0.75rem 0;
}

.sidebar small.text-muted {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    opacity: 0.5;
}


/* ============================================================
   Cards & Micro-animations
   ============================================================ */

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 0.875rem;
    box-shadow: var(--shadow-sm);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
}

.card-header {
    border-bottom: 1px solid var(--card-border);
    padding: 0.875rem 1.25rem;
    font-size: 0.85rem;
}

.card-body {
    padding: 1.25rem;
}

.stat-card,
.item-card {
    border: 1px solid var(--card-border);
    border-radius: 0.875rem;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.stat-card:hover,
.item-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.item-card-photo {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.item-card-photo-placeholder,
.item-photo-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: var(--bs-tertiary-bg);
    color: var(--bs-secondary-color);
}

.item-card-photo-placeholder {
    height: 180px;
}

.item-photo-preview img {
    max-height: 220px;
    object-fit: cover;
}

.item-photo-placeholder {
    min-height: 160px;
    border: 1px dashed var(--card-border);
    border-radius: 0.75rem;
}

.item-photo-placeholder .bi {
    font-size: 2rem;
}

.item-hero-photo-img {
    width: 100%;
    max-height: 420px;
    object-fit: cover;
    display: block;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    transition: transform 0.3s ease;
}

.stat-card:hover .stat-icon {
    transform: scale(1.1) rotate(4deg);
}


/* ============================================================
   Buttons
   ============================================================ */

.btn {
    font-weight: 500;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
    font-size: 0.875rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--ch-primary), #7c3aed);
    border: none;
    color: #fff;
    box-shadow: 0 2px 8px rgba(var(--ch-primary-rgb), 0.25);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(var(--ch-primary-rgb), 0.35);
    background: linear-gradient(135deg, var(--ch-primary-hover), #6d28d9);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-outline-primary:hover {
    background: rgba(var(--ch-primary-rgb), 0.08);
    color: var(--ch-primary);
    border-color: var(--ch-primary);
}

.btn-outline-secondary {
    color: var(--bs-secondary-color);
    border-color: var(--card-border);
    border-radius: 0.5rem;
}

.btn-outline-secondary:hover {
    background: var(--bs-tertiary-bg);
    color: var(--bs-body-color);
}

.btn-outline-danger {
    border-radius: 0.5rem;
}

.btn-outline-warning {
    border-radius: 0.5rem;
}


/* ============================================================
   Forms
   ============================================================ */

.form-control,
.form-select {
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 0.5rem;
    color: var(--bs-body-color);
    font-size: 0.875rem;
    padding: 0.55rem 0.85rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus,
.form-select:focus {
    background-color: var(--input-bg);
    border-color: var(--ch-primary);
    box-shadow: 0 0 0 3px rgba(var(--ch-primary-rgb), 0.12);
    color: var(--bs-body-color);
}

.form-control::placeholder {
    color: var(--bs-secondary-color);
    opacity: 0.6;
}

.form-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--bs-secondary-color);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 0.35rem;
}

.form-text {
    font-size: 0.775rem;
    color: var(--bs-secondary-color);
}

.form-check-input:checked {
    background-color: var(--ch-primary);
    border-color: var(--ch-primary);
}

.form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(var(--ch-primary-rgb), 0.12);
}

.form-control-color {
    border-radius: 0.5rem;
    height: 2.5rem;
}


/* ============================================================
   Dropdown Menus
   ============================================================ */

.dropdown-menu {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
    padding: 0.5rem;
    min-width: 200px;
    animation: dropdownFade 0.15s ease-out;
}

@keyframes dropdownFade {
    from { opacity: 0; transform: translateY(-4px); }
    to   { opacity: 1; transform: translateY(0); }
}

.dropdown-item {
    border-radius: 0.5rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
    color: var(--bs-body-color);
    transition: background 0.15s ease;
}

.dropdown-item:hover {
    background: rgba(var(--ch-primary-rgb), 0.06);
    color: var(--ch-primary);
}

.dropdown-item.text-danger:hover {
    background: rgba(var(--ch-danger-rgb), 0.08);
    color: var(--ch-danger);
}

.dropdown-divider {
    border-color: var(--card-border);
    margin: 0.35rem 0;
}


/* ============================================================
   Alerts
   ============================================================ */

.alert {
    border-radius: 0.75rem;
    border: none;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.85rem 1.25rem;
}

.alert-success {
    background: rgba(var(--ch-success-rgb), 0.1);
    color: var(--ch-success);
}

.alert-danger {
    background: rgba(var(--ch-danger-rgb), 0.1);
    color: var(--ch-danger);
}


/* ============================================================
   Tables
   ============================================================ */

.table {
    color: var(--bs-body-color);
    font-size: 0.85rem;
}

.table > thead > tr > th {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--bs-secondary-color);
    border-bottom: 1px solid var(--card-border);
    padding: 0.85rem 1rem;
}

.table > tbody > tr > td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--card-border);
    vertical-align: middle;
}

.table-hover > tbody > tr:hover > td {
    background: rgba(var(--ch-primary-rgb), 0.03);
}


/* ============================================================
   Compare Table
   ============================================================ */

.compare-card {
    overflow: visible;   /* override the global .card overflow:hidden */
}

.compare-card > .table-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 0.875rem;
}

.compare-table {
    font-size: 0.84rem;
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
}

.compare-table th {
    white-space: nowrap;
    position: sticky;
    top: 0;
    background: var(--card-bg);
    z-index: 11;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--bs-secondary-color);
    border-bottom: 2px solid var(--card-border);
}

.compare-table td,
.compare-table th {
    padding: 0.75rem 1rem;
    vertical-align: middle;
    border-right: 1px solid var(--card-border);
}

.compare-table td:last-child,
.compare-table th:last-child {
    border-right: none;
}

.compare-table tbody tr {
    transition: background-color 0.15s ease;
}

.compare-table tbody tr:hover {
    background-color: rgba(var(--ch-primary-rgb), 0.03);
}

.compare-table tbody tr:not(:last-child) td {
    border-bottom: 1px solid var(--card-border);
}

/* Sticky first column (Item name) */
.compare-th-sticky {
    position: sticky;
    left: 0;
    z-index: 12;
    background: var(--card-bg);
    min-width: 160px;
    white-space: nowrap;
    border-right: 2px solid var(--card-border) !important;
}

.compare-table thead .compare-th-sticky {
    z-index: 13;   /* above both row-sticky and header-sticky */
}

.compare-table a {
    color: var(--ch-primary);
    font-weight: 500;
}

.compare-table a:hover {
    text-decoration: underline;
}

.highlight-lowest  { background: rgba(var(--ch-success-rgb), 0.10) !important; }
.highlight-highest { background: rgba(var(--ch-primary-rgb), 0.10) !important; }
.highlight-best    { background: rgba(var(--ch-warning-rgb), 0.10) !important; }

/* Legend */
.compare-legend {
    display: flex;
    gap: 1.25rem;
    font-size: 0.8rem;
    color: var(--bs-secondary-color);
    align-items: center;
}

.legend-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 0.35rem;
    vertical-align: middle;
}


/* ============================================================
   Badges
   ============================================================ */

.status-badge {
    display: inline-block;
    padding: 0.3rem 0.65rem;
    border-radius: 50rem;
    font-size: 0.7rem;
    font-weight: 600;
    color: #fff;
    letter-spacing: 0.02em;
}

.badge {
    font-weight: 600;
    font-size: 0.7rem;
    border-radius: 0.375rem;
    padding: 0.3rem 0.5rem;
}

.pro-badge {
    background: rgba(var(--ch-success-rgb), 0.12);
    color: var(--ch-success);
    border-radius: 0.375rem;
    padding: 0.3rem 0.55rem;
}

.con-badge {
    background: rgba(var(--ch-danger-rgb), 0.12);
    color: var(--ch-danger);
    border-radius: 0.375rem;
    padding: 0.3rem 0.55rem;
}


/* ============================================================
   Favorites, Score Bars
   ============================================================ */

.favorite-star {
    cursor: pointer;
    color: var(--bs-secondary-color);
    opacity: 0.4;
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275),
                color 0.2s ease,
                opacity 0.2s ease;
}

.favorite-star:hover {
    transform: scale(1.25);
    opacity: 0.8;
}

.favorite-star.active {
    color: var(--ch-warning);
    opacity: 1;
    filter: drop-shadow(0 0 6px rgba(var(--ch-warning-rgb), 0.5));
}

.score-bar {
    height: 8px;
    border-radius: 4px;
    background: var(--bs-tertiary-bg);
    overflow: hidden;
}

.score-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--ch-primary), #7c3aed);
    border-radius: 4px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}


/* ============================================================
   Map
   ============================================================ */

#map {
    height: 500px;
    border-radius: 0.875rem;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-sm);
}


/* ============================================================
   Utilities
   ============================================================ */

.table-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.text-muted {
    color: var(--bs-secondary-color) !important;
}

/* Page headers */
h1.h3, .h3 {
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--bs-body-color);
}


/* ============================================================
   Guest Layout (Login/Register)
   ============================================================ */

.guest-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bs-body-bg) 0%, var(--bs-tertiary-bg) 100%);
    padding: 2rem 1rem;
    position: relative;
}

.guest-wrapper::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(var(--ch-primary-rgb), 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.guest-wrapper .card {
    border: 1px solid var(--card-border);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    background: var(--card-bg);
}


/* ============================================================
   Scrollbar
   ============================================================ */

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(150, 150, 150, 0.25);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(150, 150, 150, 0.45);
}


/* ============================================================
   Responsive tweaks
   ============================================================ */

@media (max-width: 991.98px) {
    .main-content {
        padding: 1rem;
    }

    .sidebar-open ~ .main-content::before {
        content: '';
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.3);
        z-index: 1019;
    }
}

@media (max-width: 575.98px) {
    .main-content {
        padding: 0.75rem;
    }
}