:root {
    --bg: #f4f6fb;
    --surface: #ffffff;
    --border: #e2e5ec;
    --border-strong: #cbd0dc;
    --text: #1a1d29;
    --muted: #6b7280;
    --muted-2: #9aa1b0;

    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-soft: #eef0fe;
    --accent: #7c3aed;

    --danger: #dc2626;
    --danger-soft: #fdecec;
    --success: #16a34a;
    --success-soft: #eafaf0;
    --warning: #b45309;
    --warning-soft: #fff4e0;

    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 14px;
    --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
    --shadow: 0 4px 16px rgba(16, 24, 40, 0.08);
    --shadow-lg: 0 20px 50px rgba(16, 24, 40, 0.22);
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
}

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

@keyframes fade-in-scale {
    from { opacity: 0; transform: scale(0.96); }
    to { opacity: 1; transform: scale(1); }
}

@media (prefers-reduced-motion: reduce) {
    * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    margin: 0;
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    font-size: 15px;
    line-height: 1.5;
}

h1, h2, h3 {
    line-height: 1.25;
    margin: 0 0 16px;
    font-weight: 650;
    letter-spacing: -0.01em;
}

h1 { font-size: 1.55rem; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1.02rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }

a { color: var(--primary); }

code {
    background: var(--primary-soft);
    padding: 1px 6px;
    border-radius: 4px;
    font-size: 0.85em;
}

/* Auth pages (login, installer) */

.auth-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: radial-gradient(circle at top, #eef0ff 0%, var(--bg) 55%);
}

.auth-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 32px;
    width: 100%;
    max-width: 400px;
    margin: 16px;
}

.auth-card h1 {
    font-size: 1.4rem;
}

.auth-card ul {
    list-style: none;
    padding: 0;
    margin: 0 0 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.9rem;
}

/* Cards */

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    max-width: 480px;
    margin-bottom: 24px;
}

/* Forms */

form label {
    display: block;
    margin-top: 14px;
    margin-bottom: 4px;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text);
}

form label:first-of-type {
    margin-top: 0;
}

form input[type="text"],
form input[type="email"],
form input[type="password"],
form input[type="date"],
form input[type="file"],
form select {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--surface);
    color: var(--text);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

form input:focus, form select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-soft);
}

form button {
    margin-top: 20px;
}

/* Buttons */

button,
.button,
.button-primary,
.button-small,
.button-ghost,
.button-danger {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--primary);
    color: #fff;
    border: 1px solid transparent;
    padding: 9px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    font-family: inherit;
    transition: background 0.15s ease, box-shadow 0.15s ease, transform 0.1s ease;
}

button:hover, .button:hover, .button-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.28);
    transform: translateY(-1px);
}

button:active, .button:active {
    transform: translateY(0);
    box-shadow: none;
}

.button-small {
    padding: 5px 11px;
    font-size: 0.78rem;
}

.button-ghost {
    background: transparent;
    border: 1px solid var(--border-strong);
    color: var(--text);
}

.button-ghost:hover {
    background: var(--bg);
}

.button-danger {
    background: var(--danger);
}

.button-danger:hover {
    background: #b91c1c;
}

.inline-form {
    display: inline-block;
    margin-right: 6px;
}

/* Top navigation */

.sandbox-banner {
    background: var(--warning-soft);
    color: var(--warning);
    text-align: center;
    padding: 8px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    border-bottom: 1px solid #f3cf94;
}

.sandbox-banner a {
    color: inherit;
    text-decoration: underline;
    margin-left: 8px;
}

.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 8px rgba(16, 24, 40, 0.04);
    position: sticky;
    top: 0;
    z-index: 10;
}

.topbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 28px;
    padding: 12px 24px;
}

.topbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    font-size: 0.98rem;
}

.topbar-brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.topbar-nav {
    display: flex;
    gap: 4px;
    flex: 1;
}

.nav-link {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 600;
    padding: 7px 12px;
    border-radius: var(--radius-sm);
    transition: background 0.15s ease, color 0.15s ease;
}

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

.nav-link-active {
    color: var(--primary);
    background: var(--primary-soft);
}

.topbar-logout {
    display: flex;
    align-items: center;
    gap: 12px;
}

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

/* Content */

.content {
    padding: 28px 24px 60px;
    max-width: 1200px;
    margin: 0 auto;
    animation: fade-in 0.35s ease;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 4px;
}

.page-header h1 {
    margin-bottom: 4px;
}

.muted { color: var(--muted); }
.small { font-size: 0.8rem; }

/* Alerts */

.alert {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 18px;
    font-size: 0.9rem;
    border: 1px solid transparent;
}

.alert-error {
    background: var(--danger-soft);
    color: var(--danger);
    border-color: #f6c9c9;
}

.alert-success {
    background: var(--success-soft);
    color: var(--success);
    border-color: #bfe8cd;
}

/* Tables */

.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--surface);
    margin-top: 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.data-table th, .data-table td {
    text-align: left;
    padding: 11px 14px;
    font-size: 0.87rem;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    background: var(--bg);
    color: var(--muted);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

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

.data-table tbody tr {
    animation: fade-in 0.3s ease backwards;
    transition: background 0.12s ease;
}

.data-table tbody tr:nth-child(1) { animation-delay: 0.02s; }
.data-table tbody tr:nth-child(2) { animation-delay: 0.05s; }
.data-table tbody tr:nth-child(3) { animation-delay: 0.08s; }
.data-table tbody tr:nth-child(4) { animation-delay: 0.11s; }
.data-table tbody tr:nth-child(5) { animation-delay: 0.14s; }
.data-table tbody tr:nth-child(n+6) { animation-delay: 0.16s; }

.data-table tbody tr:hover {
    background: #fafbfe;
}

.data-table tr.row-warning {
    background: var(--warning-soft);
}

.data-table tr.row-warning:hover {
    background: #fdecc8;
}

/* Empty states */

.empty-state {
    border: 1.5px dashed var(--border-strong);
    border-radius: var(--radius-lg);
    padding: 48px 24px;
    text-align: center;
    color: var(--muted);
    margin-top: 16px;
    animation: fade-in 0.3s ease;
}

.empty-state .empty-state-icon {
    font-size: 2rem;
    margin-bottom: 12px;
    opacity: 0.8;
}

.empty-state p {
    margin: 0;
}

/* Dashboard stat cards */

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 14px;
    margin: 20px 0 28px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
    box-shadow: var(--shadow-sm);
    animation: fade-in-scale 0.3s ease backwards;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.stat-card .stat-value {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
}

.stat-card .stat-label {
    font-size: 0.78rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 600;
    margin-top: 2px;
}

.stat-card.stat-warning .stat-value { color: var(--warning); }
.stat-card.stat-primary .stat-value { color: var(--primary); }
.stat-card.stat-danger .stat-value { color: var(--danger); }

/* Loading overlay */

.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 17, 26, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: overlay-fade-in 0.2s ease;
}

.loading-overlay[hidden] {
    display: none;
}

@keyframes overlay-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

.loading-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 40px 48px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    min-width: 300px;
    animation: fade-in-scale 0.25s ease;
}

.loading-spinner {
    width: 46px;
    height: 46px;
    margin: 0 auto 22px;
    border-radius: 50%;
    border: 4px solid var(--primary-soft);
    border-top-color: var(--primary);
    animation: loading-spin 0.8s linear infinite;
}

@keyframes loading-spin {
    to { transform: rotate(360deg); }
}

.loading-message {
    font-weight: 650;
    margin: 0 0 18px;
    color: var(--text);
    font-size: 0.95rem;
}

.loading-bar {
    width: 220px;
    height: 6px;
    margin: 0 auto;
    background: var(--bg);
    border-radius: 999px;
    overflow: hidden;
}

.loading-bar-fill {
    height: 100%;
    width: 35%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    animation: loading-slide 1.2s ease-in-out infinite;
}

@keyframes loading-slide {
    0% { transform: translateX(-120%); }
    100% { transform: translateX(380%); }
}

.loading-hint {
    margin: 14px 0 0;
    font-size: 0.78rem;
    color: var(--muted);
}

/* Badges */

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.74rem;
    font-weight: 600;
    background: var(--bg);
    color: var(--muted);
    border: 1px solid var(--border);
}

.badge-error { background: var(--danger-soft); color: var(--danger); border-color: #f6c9c9; }
.badge-success { background: var(--success-soft); color: var(--success); border-color: #bfe8cd; }
.badge-sandbox { background: var(--warning-soft); color: var(--warning); border-color: #f3cf94; }
.badge-parsed { background: var(--primary-soft); color: var(--primary); border-color: #d6d9fb; }
.badge-uploaded { background: var(--bg); color: var(--muted); }

/* Filter form (logs) */

.filter-form {
    display: flex;
    gap: 14px;
    align-items: flex-end;
    max-width: none;
    flex-wrap: wrap;
}

.filter-form label {
    margin-top: 0;
}

.filter-form select,
.filter-form input {
    min-width: 160px;
}

/* Misc */

.context-json {
    white-space: pre-wrap;
    word-break: break-all;
    font-size: 0.75rem;
    background: var(--bg);
    padding: 10px;
    border-radius: var(--radius-sm);
    margin-top: 6px;
}

details summary {
    cursor: pointer;
    color: var(--primary);
}

.pagination {
    margin-top: 20px;
    display: flex;
    gap: 6px;
}

.pagination a {
    padding: 5px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--text);
    font-size: 0.85rem;
    background: var(--surface);
}

.pagination a.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

@media (max-width: 720px) {
    .topbar-inner {
        flex-wrap: wrap;
        gap: 12px;
    }
    .topbar-nav {
        order: 3;
        width: 100%;
        overflow-x: auto;
    }
    .content {
        padding: 20px 14px 40px;
    }
    .data-table {
        display: block;
        overflow-x: auto;
    }
}