:root {
    --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    --bg: #f4f6fb;
    --surface: #ffffff;
    --text: #0f172a;
    --muted: #64748b;
    --border: #e2e8f0;
    --sidebar: #0b1220;
    --sidebar-text: #e2e8f0;
    --accent: #2563eb;
    --accent-2: #7c3aed;
    --accent-ring: rgba(37, 99, 235, 0.2);
    --danger: #dc2626;
    --success-bg: #ecfdf5;
    --success-text: #065f46;
    --error-bg: #fef2f2;
    --error-text: #991b1b;
    --login-bg: #f8fafc;
    --login-panel-bg: #f8fafc;
    --input-bg: #eef2ff;
    --input-border: #c7d2fe;
}

html[data-theme="dark"] {
    --bg: #0b1120;
    --surface: #111827;
    --text: #f1f5f9;
    --muted: #94a3b8;
    --border: #1f2937;
    --sidebar: #020617;
    --sidebar-text: #e2e8f0;
    --accent: #60a5fa;
    --accent-2: #a78bfa;
    --accent-ring: rgba(96, 165, 250, 0.25);
    --success-bg: rgba(16, 185, 129, 0.12);
    --success-text: #6ee7b7;
    --error-bg: rgba(248, 113, 113, 0.12);
    --error-text: #fecaca;
    --login-bg: #0b1120;
    --login-panel-bg: #0f172a;
    --input-bg: #1e293b;
    --input-border: #334155;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
}

.app-layout {
    display: flex;
    width: 100%;
    min-height: 100vh;
}

.app-sidebar {
    width: 260px;
    flex-shrink: 0;
    background: linear-gradient(180deg, var(--sidebar) 0%, #111827 100%);
    color: var(--sidebar-text);
    padding: 1.5rem 1rem;
    position: sticky;
    top: 0;
    align-self: flex-start;
    min-height: 100vh;
    border-right: 1px solid rgba(255, 255, 255, 0.06);
}

.app-brand {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 0.25rem 0.5rem 1.25rem;
    font-weight: 800;
    font-size: 1.15rem;
    letter-spacing: -0.02em;
}

.app-brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    display: grid;
    place-items: center;
    font-size: 0.75rem;
    font-weight: 800;
    color: #fff;
}

.app-nav {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.app-nav a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 0.85rem;
    border-radius: 10px;
    color: rgba(226, 232, 240, 0.88);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
    transition: background 0.15s ease, color 0.15s ease;
}

.app-nav a:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.app-nav a.is-active {
    background: rgba(37, 99, 235, 0.35);
    color: #fff;
}

.app-nav-sep {
    height: 1px;
    background: rgba(255, 255, 255, 0.08);
    margin: 0.75rem 0.5rem;
}

.app-main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.app-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    position: sticky;
    top: 0;
    z-index: 5;
}

.app-topbar h1 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.app-topbar-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.app-user-chip {
    font-size: 0.85rem;
    color: var(--muted);
}

.app-user-chip strong {
    color: var(--text);
}

.theme-toggle {
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    border-radius: 999px;
    padding: 0.45rem 0.9rem;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
}

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

.app-content {
    padding: 1.25rem 1.5rem 2rem;
    flex: 1;
}

.page-title {
    margin: 0 0 1rem;
    font-size: 1.65rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.card {
    background: var(--surface);
    border-radius: 16px;
    padding: 1.25rem 1.35rem;
    border: 1px solid var(--border);
    box-shadow: 0 10px 40px rgba(15, 23, 42, 0.04);
    margin-bottom: 1rem;
}

.card > h3:first-child {
    margin-top: 0;
}

h1, h3 {
    margin-top: 0;
}

label {
    font-size: 0.8rem;
    color: var(--muted);
    margin-bottom: 0.35rem;
    display: block;
    font-weight: 600;
}

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

input, select, textarea {
    width: 100%;
    padding: 0.65rem 0.75rem;
    margin-bottom: 0.75rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    font-size: 0.92rem;
    background: var(--surface);
    color: var(--text);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-ring);
}

button, .btn {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    border: none;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    display: inline-block;
    padding: 0.55rem 1rem;
    border-radius: 10px;
    font-size: 0.88rem;
    line-height: 1.25;
    width: auto;
}

button:hover, .btn:hover {
    filter: brightness(1.06);
}

.flash {
    padding: 0.65rem 1rem;
    border-radius: 12px;
    margin-bottom: 0.85rem;
    font-size: 0.9rem;
}

.flash.success {
    background: var(--success-bg);
    color: var(--success-text);
    border: 1px solid rgba(16, 185, 129, 0.25);
}

.flash.error {
    background: var(--error-bg);
    color: var(--error-text);
    border: 1px solid rgba(248, 113, 113, 0.25);
}

.grid {
    display: grid;
    gap: 1rem;
}

.grid.two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stat p {
    font-size: 2rem;
    margin: 0;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

table th, table td {
    border-bottom: 1px solid var(--border);
    padding: 0.6rem 0.5rem;
    text-align: left;
    vertical-align: top;
}

table th {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--muted);
}

.text-wrap {
    word-break: break-all;
    max-width: 360px;
}

.hint {
    margin: 0.35rem 0 0;
    color: var(--muted);
    font-size: 0.85rem;
}

.imports-toolbar {
    margin-bottom: 0.75rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    align-items: center;
}

.imports-toolbar form {
    margin: 0;
}

.btn.is-muted {
    background: #64748b;
}

.btn.is-info {
    background: #0ea5e9;
}

.btn.is-danger {
    background: var(--danger);
}

.btn.is-danger:hover {
    filter: brightness(1.05);
}

.table-wrap {
    width: 100%;
    overflow-x: auto;
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    min-width: 92px;
}

.chart-box {
    position: relative;
    height: 260px;
    width: 100%;
}

.chart-box canvas {
    width: 100% !important;
    height: 100% !important;
    display: block;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 600;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--muted);
}

@media (max-width: 980px) {
    .app-layout {
        flex-direction: column;
    }
    .app-sidebar {
        width: 100%;
        min-height: unset;
        position: static;
    }
    .app-nav {
        flex-direction: row;
        flex-wrap: wrap;
    }
    .grid.two, .grid.three {
        grid-template-columns: 1fr;
    }
}