*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg-primary: #1e1e2e;
    --bg-secondary: #181825;
    --bg-surface: #313244;
    --text-primary: #cdd6f4;
    --text-secondary: #a6adc8;
    --accent: #89b4fa;
    --accent-hover: #74c7ec;
    --danger: #f38ba8;
    --success: #a6e3a1;
    --border: #45475a;
    --radius: 6px;
    --font: "Segoe UI", system-ui, -apple-system, sans-serif;
    --font-mono: "Cascadia Code", "Fira Code", monospace;
}

[data-theme="light"] {
    --bg-primary: #eff1f5;
    --bg-secondary: #e6e9ef;
    --bg-surface: #ccd0da;
    --text-primary: #4c4f69;
    --text-secondary: #6c6f85;
    --accent: #1e66f5;
    --accent-hover: #2a6ef5;
    --danger: #d20f39;
    --success: #40a02b;
    --border: #bcc0cc;
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

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

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}
.navbar__brand a {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent);
}
.navbar__links { display: flex; gap: 1rem; align-items: center; }
.navbar__links a { color: var(--text-secondary); font-size: 0.9rem; }
.navbar__links a:hover { color: var(--text-primary); }

.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.35rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s, border-color 0.2s;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
.theme-toggle__moon { display: none; }
.theme-toggle__sun { display: block; }
[data-theme="light"] .theme-toggle__moon { display: block; }
[data-theme="light"] .theme-toggle__sun { display: none; }

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-surface);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: background 0.2s;
}
.btn:hover { background: var(--border); }
.btn--primary { background: var(--accent); color: var(--bg-primary); border-color: var(--accent); }
.btn--primary:hover { background: var(--accent-hover); }
.btn--secondary { background: transparent; border-color: var(--accent); color: var(--accent); }
.btn--danger { border-color: var(--danger); color: var(--danger); }
.btn--danger:hover { background: var(--danger); color: var(--bg-primary); }
.btn--small { padding: 0.25rem 0.5rem; font-size: 0.8rem; }

.main-content { padding: 1.5rem; }

.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 0.5rem;
    border: 1px solid var(--border);
}
.alert--error { border-color: var(--danger); color: var(--danger); }

.landing {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
}
.landing h1 { font-size: 2.5rem; margin-bottom: 0.5rem; }
.landing p { color: var(--text-secondary); margin-bottom: 2rem; font-size: 1.1rem; }
.landing__actions { display: flex; gap: 1rem; }

.workspace {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 0;
    height: calc(100vh - 60px);
    margin: -1.5rem;
}

.workspace__sidebar {
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 1rem;
}
.sidebar__header { margin-bottom: 1rem; }
.sidebar__header h2 { font-size: 0.85rem; text-transform: uppercase; color: var(--text-secondary); margin-bottom: 0.5rem; }
.upload-form { display: flex; gap: 0.5rem; align-items: center; }
.upload-form input[type="file"] { font-size: 0.8rem; color: var(--text-secondary); max-width: 160px; }

.file-list { list-style: none; }
.file-list__item {
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2px;
}
.file-list__item:hover { background: var(--bg-surface); }
.file-list__item.active { background: var(--bg-surface); border-left: 2px solid var(--accent); }
.file-list__name { font-size: 0.9rem; font-family: var(--font-mono); }
.file-list__meta { font-size: 0.75rem; color: var(--text-secondary); }
.file-list__empty { color: var(--text-secondary); font-size: 0.85rem; padding: 0.5rem; }

.workspace__main {
    padding: 1.5rem;
    overflow-y: auto;
}

.workspace__welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 50vh;
    color: var(--text-secondary);
    text-align: center;
}

.action-panel {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}
.action-panel h3 { font-size: 0.85rem; text-transform: uppercase; color: var(--text-secondary); margin-bottom: 0.75rem; }
.action-panel__buttons { display: flex; gap: 0.5rem; flex-wrap: wrap; }

.data-grid {
    overflow-x: auto;
    margin-bottom: 1.5rem;
}
.data-grid table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    font-family: var(--font-mono);
}
.data-grid th, .data-grid td {
    padding: 0.4rem 0.75rem;
    border: 1px solid var(--border);
    text-align: left;
    white-space: nowrap;
}
.data-grid th {
    background: var(--bg-secondary);
    color: var(--accent);
    font-weight: 600;
    position: sticky;
    top: 0;
}
.data-grid tr:hover { background: var(--bg-surface); }

.viz-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    min-height: 400px;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
.table th, .table td {
    padding: 0.6rem 1rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
}
.table th { color: var(--text-secondary); font-weight: 600; }

.profile { max-width: 600px; }
.profile h1 { margin-bottom: 1rem; }
.profile__details p { margin-bottom: 0.5rem; }

.auth-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
}
.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
}
.auth-card h1 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
    text-align: center;
}
.auth-card .auth-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: center;
    margin-bottom: 1.5rem;
}
.auth-card .form-group {
    margin-bottom: 1rem;
}
.auth-card label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.3rem;
}
.auth-card input[type="email"],
.auth-card input[type="password"],
.auth-card input[type="text"] {
    width: 100%;
    padding: 0.6rem 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: var(--font);
    transition: border-color 0.2s;
}
.auth-card input:focus {
    outline: none;
    border-color: var(--accent);
}
.auth-card .btn--primary {
    width: 100%;
    padding: 0.65rem;
    font-size: 0.95rem;
    margin-top: 0.5rem;
}
.auth-card .auth-links {
    margin-top: 1.25rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}
.auth-card .auth-links a {
    color: var(--accent);
}
.auth-card .auth-divider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1.25rem 0;
    color: var(--text-secondary);
    font-size: 0.8rem;
}
.auth-card .auth-divider::before,
.auth-card .auth-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--border);
}
.auth-card .btn--social {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.2s;
    text-decoration: none;
}
.auth-card .btn--social svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}
.auth-card .btn--social:hover {
    background: var(--border);
    color: var(--text-primary);
}
.auth-card .errorlist {
    list-style: none;
    padding: 0;
    margin: 0.25rem 0 0;
}
.auth-card .errorlist li {
    color: var(--danger);
    font-size: 0.8rem;
}
.auth-card .help-text {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.viz-stats {
    display: flex;
    gap: 1.5rem;
    padding: 0.6rem 1rem;
    margin-top: 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.8rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
}
.viz-stats strong {
    color: var(--text-primary);
    font-weight: 600;
}

.params-modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 100;
    background: rgba(0, 0, 0, 0.55);
    align-items: center;
    justify-content: center;
}
.params-modal {
    width: 100%;
    max-width: 440px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}
.params-modal h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}
.params-modal .form-group {
    margin-bottom: 1rem;
}
.params-modal label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.3rem;
}
.params-modal input[type="number"],
.params-modal select {
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: var(--font);
}
.params-modal input[type="number"]:focus,
.params-modal select:focus {
    outline: none;
    border-color: var(--accent);
}
.params-modal__actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
    margin-top: 1.25rem;
}

.param-checkboxes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.25rem;
}
.param-checkbox {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.85rem;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    transition: border-color 0.2s;
}
.param-checkbox:hover {
    border-color: var(--accent);
}
.param-checkbox input[type="checkbox"] {
    accent-color: var(--accent);
}

.file-list__actions {
    display: flex;
    gap: 0.25rem;
    align-items: center;
}
.file-list__delete {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.75rem;
    padding: 2px 4px;
    border-radius: 3px;
    opacity: 0;
    transition: opacity 0.2s, color 0.2s;
}
.file-list__item:hover .file-list__delete {
    opacity: 1;
}
.file-list__delete:hover {
    color: var(--danger);
}

.file-list__item--shared {
    border-left: 2px solid var(--accent);
}
.file-list__shared-badge {
    font-size: 0.65rem;
    text-transform: uppercase;
    color: var(--accent);
    background: rgba(137, 180, 250, 0.15);
    padding: 1px 6px;
    border-radius: 3px;
}

.results-page { max-width: 960px; }
.results-page h1 { margin-bottom: 1rem; }

.result-detail { max-width: 960px; }
.result-detail h1 { margin-bottom: 0.5rem; }
.result-detail p { margin-bottom: 0.4rem; color: var(--text-secondary); font-size: 0.9rem; }
.result-detail strong { color: var(--text-primary); }
.result-detail .viz-container { margin-top: 1.5rem; }
.result-detail__actions { display: flex; gap: 0.5rem; margin-top: 1rem; margin-bottom: 1rem; }

.sidebar__section { margin-top: 1.5rem; }
.sidebar__section h2 {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}
.history-list { list-style: none; }
.history-list__item {
    padding: 0.4rem 0.75rem;
    border-radius: var(--radius);
    margin-bottom: 2px;
    display: block;
    color: var(--text-primary);
    font-size: 0.82rem;
    transition: background 0.15s;
}
.history-list__item:hover {
    background: var(--bg-surface);
    color: var(--text-primary);
}
.history-list__item small {
    display: block;
    color: var(--text-secondary);
    font-size: 0.72rem;
}

.viz-controls {
    display: flex;
    gap: 1rem;
    padding: 0.5rem 0;
    margin-bottom: 0.5rem;
}
.viz-toggle {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
    cursor: pointer;
}
.viz-toggle input[type="checkbox"] {
    accent-color: var(--accent);
}

.viz-metrics-table {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.viz-metrics-table .metrics-scroll {
    max-height: 300px;
    overflow-y: auto;
}
.viz-metrics-table table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
    font-family: var(--font-mono);
}
.viz-metrics-table th,
.viz-metrics-table td {
    padding: 0.35rem 0.6rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
    white-space: nowrap;
}
.viz-metrics-table th {
    background: var(--bg-secondary);
    color: var(--accent);
    font-weight: 600;
    position: sticky;
    top: 0;
}
.viz-metrics-table tr:hover {
    background: var(--bg-surface);
}