/* ========== Theme Variables ========== */
:root,
[data-theme="light"] {
    --bg-primary: #f8f9fb;
    --bg-card: #ffffff;
    --bg-card-hover: #fafbfc;
    --bg-input: #f1f3f5;
    --bg-input-hover: #e4e7eb;
    --bg-hero: linear-gradient(135deg, #5b6abf 0%, #7c5cbf 100%);
    --bg-sidebar: #111827;

    --text-primary: #1a1a2e;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --text-on-card: #1a1a2e;

    --border-light: #e5e7eb;
    --border-card: rgba(0, 0, 0, 0.05);

    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.1);

    --accent: #5b6abf;
    --accent-secondary: #7c5cbf;
    --accent-soft: rgba(91, 106, 191, 0.08);
    --success: #16a34a;
    --danger: #dc2626;
    --hot: #ea580c;

    --img-placeholder: #f3f4f6;
    --spinner-track: #e5e7eb;
    --radius: 12px;
}

[data-theme="dark"] {
    --bg-primary: #1a1c23;
    --bg-card: #23262f;
    --bg-card-hover: #2a2d37;
    --bg-input: #2a2d37;
    --bg-input-hover: #33363f;
    --bg-hero: linear-gradient(135deg, #4a58a8 0%, #6a4fa8 100%);
    --bg-sidebar: #15171e;

    --text-primary: #e8e9ed;
    --text-secondary: #a0a4b0;
    --text-muted: #6e7280;
    --text-on-card: #e8e9ed;

    --border-light: #2e3140;
    --border-card: rgba(255, 255, 255, 0.06);

    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.2), 0 1px 2px rgba(0, 0, 0, 0.12);
    --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.28);

    --accent: #7c8bf5;
    --accent-secondary: #a07cf5;
    --accent-soft: rgba(124, 139, 245, 0.12);
    --success: #22c55e;
    --danger: #ef4444;
    --hot: #f97316;

    --img-placeholder: #2a2d37;
    --spinner-track: #2e3140;
    --radius: 12px;
}

/* ========== Base Reset ========== */
*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    margin: 0;
    padding: 0;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 15px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background 0.3s, color 0.3s;
}

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

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

h1:focus {
    outline: none;
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

/* ========== Layout Structure ========== */
.page {
    display: flex;
    min-height: 100vh;
    padding-top: 52px;
}

.top-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 52px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 200;
    transition: background 0.3s, border-color 0.3s;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-brand {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.3px;
    transition: color 0.3s;
}

.header-brand:hover {
    color: var(--accent);
    text-decoration: none;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 6px;
}

.sidebar-toggle-btn,
.theme-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    transition: all 0.15s;
}

.sidebar-toggle-btn:hover,
.theme-toggle-btn:hover {
    background: var(--bg-input);
    color: var(--text-primary);
}

.sidebar {
    width: 240px;
    position: fixed;
    top: 52px;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--bg-sidebar);
    z-index: 100;
    transition: width 0.25s ease, transform 0.25s ease;
}

.main-content {
    flex: 1;
    margin-left: 240px;
    min-width: 0;
    min-height: calc(100vh - 52px);
    background: var(--bg-primary);
    transition: margin-left 0.25s ease, background 0.3s;
}

/* Collapsed sidebar */
.sidebar.collapsed {
    width: 60px;
}

.sidebar.collapsed .sidebar-text {
    display: none;
}

.sidebar.collapsed .badge {
    display: none;
}

.sidebar.collapsed .nav-section-title {
    display: none;
}

.sidebar.collapsed .stat-label {
    display: none;
}

.sidebar.collapsed .brand-link {
    justify-content: center;
}

.sidebar.collapsed .nav-section {
    padding: 4px 6px;
}

.sidebar.collapsed .nav-section .nav-link {
    justify-content: center;
    padding: 10px 8px;
    gap: 0;
}

.sidebar.collapsed .sidebar-stats {
    padding: 10px 6px;
}

.sidebar.collapsed .nav-divider {
    margin: 6px 8px;
}

.sidebar.collapsed ~ .main-content {
    margin-left: 60px;
}

/* Scrollbar */
.sidebar::-webkit-scrollbar {
    width: 4px;
}

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

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

/* Mobile responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 260px;
    }

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

    .sidebar.collapsed {
        transform: translateX(-100%);
    }

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

    .sidebar.collapsed ~ .main-content {
        margin-left: 0;
    }

    .header-brand {
        display: none;
    }
}