:root {
    --bg: #0f172a;
    --card: #111827;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --accent: #3b82f6;
    --accent-2: #2563eb;
    --border: #1f2937;
    --success: #22c55e;
}

* { box-sizing: border-box; }

body {
    background: linear-gradient(180deg, #0b1220, var(--bg));
    color: var(--text);
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    margin: 0;
    padding: 2rem 1rem 4rem;
}

.app-header {
    max-width: 1100px;
    margin: 0 auto 1rem;
    text-align: center;
}
.app-header h1 { margin: 0 0 .25rem; font-weight: 700; }
.subtitle { color: var(--muted); margin: 0; }

.card {
    max-width: 1100px;
    margin: 1rem auto;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.35);
    padding: 1rem 1.25rem;
}

.mode-toggle { display: inline-flex; background: #0b1220; border: 1px solid var(--border); border-radius: 10px; padding: .25rem; gap: .25rem; margin-bottom: .75rem; }
.mode-btn { background: transparent; border: none; color: var(--text); padding: .4rem .75rem; border-radius: 8px; font-weight: 600; cursor: pointer; }
.mode-btn.active { background: linear-gradient(180deg, var(--accent), var(--accent-2)); }

.upload-form { display: grid; grid-template-columns: 1fr auto; gap: .75rem; align-items: center; }
.file-label { color: var(--muted); }
#file { border: 1px dashed var(--border); background: #0b1220; color: var(--text); padding: .5rem; border-radius: 8px; }
.divider { border: none; border-top: 1px solid var(--border); margin: .5rem 0; grid-column: 1 / -1; }
#xlsxFile { border: 1px dashed var(--border); background: #0b1220; color: var(--text); padding: .5rem; border-radius: 8px; }
.hint { grid-column: 1 / -1; color: var(--muted); font-size: .875rem; }
.actions { display: flex; gap: .5rem; justify-content: end; }
.mode-section { grid-column: 1 / -1; }

.buttonClass {
    appearance: none;
    border: 1px solid var(--accent);
    color: white;
    background: linear-gradient(180deg, var(--accent), var(--accent-2));
    padding: .5rem .9rem;
    border-radius: 10px;
    font-weight: 600;
    transition: transform .06s ease, filter .2s ease, background .2s ease;
}
.buttonClass[disabled] { filter: grayscale(.7); opacity: .6; cursor: not-allowed; }
.buttonClass:hover { cursor: pointer; filter: brightness(1.1); }
.buttonClass:active { transform: translateY(1px); }

.table-card { padding: 0; }
.table-toolbar { display: flex; justify-content: space-between; align-items: center; padding: .75rem 1rem; border-bottom: 1px solid var(--border); }
.table-toolbar label { color: var(--muted); margin-right: .5rem; }
.table-toolbar select { background: #0b1220; color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: .25rem .5rem; }

.table-wrapper { position: relative; overflow: auto; max-height: 65vh; }

table { width: 100%; border-collapse: collapse; }
thead th { position: sticky; top: 0; background: #0b1220; border-bottom: 1px solid var(--border); padding: .6rem; text-align: left; }
tbody td { border-bottom: 1px solid var(--border); padding: .5rem .6rem; }
tbody tr:nth-child(even) { background: rgba(255,255,255,.03); }
tbody tr:hover { background: rgba(255,255,255,.06); }

.loading { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; background: rgba(17,24,39,.6); backdrop-filter: blur(2px); font-weight: 600; }
.hidden { display: none !important; }

.pagination { display: flex; gap: .5rem; align-items: center; justify-content: center; padding: .75rem; border-top: 1px solid var(--border); }
#pageIndicator { color: var(--muted); }