:root {
    --bg: #f4f5f7;
    --card: #ffffff;
    --text: #1c1e21;
    --muted: #6b7280;
    --border: #e2e4e9;
    --accent: #2563eb;
    --accent-dark: #1d4ed8;
    --danger: #dc2626;
    --danger-dark: #b91c1c;
    --running: #16a34a;
    --radius: 10px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.4;
}

.app {
    max-width: 720px;
    margin: 0 auto;
    padding: 16px 16px 48px;
}

.app.admin {
    max-width: 1100px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0 20px;
    font-size: 14px;
    color: var(--muted);
}

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

.topbar a:hover { text-decoration: underline; }

h1 { font-size: 20px; margin: 0 0 16px; }
h2 { font-size: 16px; margin: 24px 0 8px; }
h3 { font-size: 14px; margin: 0 0 8px; color: var(--muted); }

.timer-card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.timer-display {
    font-size: 48px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.desc-input {
    width: 100%;
    font-size: 16px;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 18px;
    background: #fff;
    color: var(--text);
}

.desc-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
}

.desc-main {
    font-size: 18px;
    text-align: center;
}

.timer-btn {
    display: inline-block;
    width: 100%;
    max-width: 260px;
    padding: 18px 24px;
    font-size: 20px;
    font-weight: 600;
    color: #fff;
    background: var(--accent);
    border: none;
    border-radius: 999px;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.05s ease;
}

.timer-btn:hover { background: var(--accent-dark); }
.timer-btn:active { transform: scale(0.98); }
.timer-btn:disabled { opacity: 0.6; cursor: default; }

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

.timer-btn.running:hover { background: var(--danger-dark); }

.today-entries { margin-top: 8px; }

.empty { color: var(--muted); font-size: 14px; }

.table-wrap {
    overflow-x: auto;
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

th, td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    white-space: nowrap;
}

td:first-child, th:first-child {
    white-space: normal;
    min-width: 180px;
}

th {
    color: var(--muted);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

tr:last-child td { border-bottom: none; }

table .desc-input {
    margin: 0;
    padding: 6px 8px;
    font-size: 14px;
    border-color: transparent;
    background: transparent;
    width: 100%;
    min-width: 160px;
}

table .desc-input:hover {
    border-color: var(--border);
}

/* Login */
.login-card {
    max-width: 340px;
    margin: 12vh auto 0;
    background: var(--card);
    border-radius: var(--radius);
    padding: 28px 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.login-card h1 {
    text-align: center;
    margin-bottom: 20px;
}

.login-card form label {
    display: block;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 14px;
}

.login-card input[type="text"],
.login-card input[type="password"] {
    display: block;
    width: 100%;
    margin-top: 6px;
    padding: 10px 12px;
    font-size: 15px;
    border: 1px solid var(--border);
    border-radius: 8px;
}

.login-card button {
    width: 100%;
    padding: 12px;
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    background: var(--accent);
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

.login-card button:hover { background: var(--accent-dark); }

.error {
    background: #fef2f2;
    color: var(--danger-dark);
    border: 1px solid #fecaca;
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 14px;
    margin-bottom: 14px;
}

/* Admin */
.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: end;
    background: var(--card);
    padding: 16px;
    border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    margin-bottom: 20px;
}

.filters label {
    font-size: 12px;
    color: var(--muted);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.filters input {
    padding: 8px 10px;
    font-size: 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
}

.filters button,
.button {
    padding: 9px 16px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 6px;
    border: none;
    background: var(--accent);
    color: #fff;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    height: fit-content;
}

.filters button:hover,
.button:hover { background: var(--accent-dark); }

.totals {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

.totals-block {
    background: var(--card);
    padding: 14px 16px;
    border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.totals-block table { font-size: 13px; }
.totals-block td { padding: 6px 4px; }
.totals-block td:last-child { text-align: right; font-variant-numeric: tabular-nums; }

.actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

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

.inline-form { display: inline; margin: 0; }

.link-btn {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    padding: 0;
    font-size: 14px;
    text-decoration: none;
}

.link-btn:hover { text-decoration: underline; }

.edit-form {
    background: var(--card);
    padding: 20px;
    border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    max-width: 480px;
}

.edit-form label {
    display: block;
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 14px;
}

.edit-form input {
    display: block;
    width: 100%;
    margin-top: 6px;
    padding: 10px 12px;
    font-size: 15px;
    border: 1px solid var(--border);
    border-radius: 8px;
}

.edit-form button {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    background: var(--accent);
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

@media (max-width: 640px) {
    .totals { grid-template-columns: 1fr; }
    .timer-display { font-size: 38px; }
    .filters { flex-direction: column; align-items: stretch; }
}