:root {
    color-scheme: light;
    --bg: #eef2f7;
    --panel: #ffffff;
    --text: #111827;
    --muted: #6b7280;
    --border: #dbe3ef;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --danger: #dc2626;
    --shadow: 0 24px 80px rgba(15, 23, 42, 0.14);
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: radial-gradient(circle at top left, #dbeafe, transparent 34rem), var(--bg);
    color: var(--text);
    padding: 32px;
}

.login-page {
    display: grid;
    place-items: center;
}

.login-card, .panel, .stat-card, .preview-popup {
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: 24px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

.login-card {
    width: min(440px, 100%);
    padding: 36px;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--primary);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

h1, h2 { margin: 0; }

.muted { color: var(--muted); }

.alert {
    margin: 18px 0;
    padding: 12px 14px;
    border-radius: 14px;
    background: #fee2e2;
    color: #991b1b;
    font-weight: 700;
}

.login-form {
    display: grid;
    gap: 12px;
    margin-top: 24px;
}

input {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 12px 14px;
    font: inherit;
}

button, .logout-button {
    border: 0;
    border-radius: 14px;
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    padding: 11px 16px;
    text-decoration: none;
    transition: transform 160ms ease, background 160ms ease;
}

button:hover, .logout-button:hover { background: var(--primary-dark); transform: translateY(-1px); }
button:disabled { cursor: wait; opacity: 0.7; transform: none; }

.topbar {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: center;
    margin-bottom: 24px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card { padding: 22px; }
.stat-card span { color: var(--muted); display: block; margin-bottom: 8px; }
.stat-card strong { font-size: clamp(22px, 3vw, 34px); }

.panel { overflow: hidden; }
.panel-header {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--border);
}

#file-filter { max-width: 360px; }
.table-wrap { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: middle;
}

th {
    color: var(--muted);
    font-size: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.filename {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    font-size: 13px;
}

.empty-state {
    color: var(--muted);
    padding: 42px;
    text-align: center;
}

.overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.55);
    z-index: 10;
}

.preview-popup {
    position: fixed;
    inset: 5vh 5vw;
    z-index: 20;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.preview-popup[hidden], .overlay[hidden] { display: none; }

.popup-header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
    padding: 18px 22px;
    border-bottom: 1px solid var(--border);
}

.popup-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.close-btn { background: #475569; }
.close-btn:hover { background: #334155; }

.popup-content {
    margin: 0;
    padding: 22px;
    overflow: auto;
    white-space: pre;
    font: 13px/1.6 "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    color: #d1d5db;
    background: #0f172a;
    flex: 1;
}

@media (max-width: 800px) {
    body { padding: 18px; }
    .topbar, .panel-header { align-items: stretch; flex-direction: column; }
    .stats-grid { grid-template-columns: 1fr; }
    #file-filter { max-width: none; }
    .preview-popup { inset: 2vh 2vw; }
}