:root {
    --primary: #3f8efc;
    --primary-dark: #2b6fd4;
    --green: #2ecc71;
    --bg: #f6f8fc;
    --card-bg: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #e5e7eb;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: 'Segoe UI', Arial, sans-serif; background: var(--bg); color: var(--text); }
.container { max-width: 1100px; margin: 0 auto; padding: 24px 16px 60px; }

.navbar { display: flex; align-items: center; justify-content: space-between; background: var(--card-bg);
    padding: 14px 24px; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 1.1rem; color: var(--primary-dark); text-decoration: none; }
.nav-links a { margin-left: 16px; text-decoration: none; color: var(--text); font-size: 0.95rem; }
.nav-links a:hover { color: var(--primary); }
.nav-user { margin-left: 16px; color: var(--muted); }

h1 { margin-top: 0; }
.muted { color: var(--muted); }

.summary-bar { display: flex; gap: 16px; margin: 20px 0; flex-wrap: wrap; }
.summary-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px;
    padding: 16px 20px; flex: 1; min-width: 150px; text-align: center; }
.summary-card span { display: block; color: var(--muted); font-size: 0.85rem; margin-bottom: 4px; }
.summary-card strong { font-size: 1.4rem; color: var(--primary-dark); }

.task-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 16px; }
.task-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 16px;
    transition: box-shadow .2s; }
.task-card.today { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(63,142,252,0.2); }
.task-card.done { background: #f0fdf4; border-color: var(--green); }
.task-head { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.task-icon { font-size: 1.4rem; }
.task-day { font-weight: 600; color: var(--muted); font-size: 0.85rem; }
.badge { background: var(--primary); color: #fff; font-size: 0.7rem; padding: 2px 8px; border-radius: 999px; margin-left: auto; }
.task-desc { color: var(--muted); font-size: 0.88rem; min-height: 40px; }

.progress-form { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }
.progress-form .chk { display: flex; align-items: center; gap: 6px; font-size: 0.9rem; }
.progress-form input[type="number"] { padding: 6px 8px; border: 1px solid var(--border); border-radius: 8px; }

.btn { display: inline-block; background: var(--primary); color: #fff; border: none; padding: 8px 16px;
    border-radius: 8px; cursor: pointer; text-decoration: none; font-size: 0.9rem; }
.btn:hover { background: var(--primary-dark); }
.btn.small { padding: 6px 10px; font-size: 0.8rem; }
.btn.secondary { background: var(--muted); }

.auth-box { max-width: 380px; margin: 40px auto; background: var(--card-bg); padding: 28px; border-radius: 12px;
    border: 1px solid var(--border); }
.auth-box label { display: block; margin-bottom: 12px; font-size: 0.9rem; }
.auth-box input { width: 100%; padding: 8px 10px; margin-top: 4px; border: 1px solid var(--border); border-radius: 8px; }
.hint { color: var(--muted); font-size: 0.8rem; }

.card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin-bottom: 20px; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.inline-form { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; margin-bottom: 16px; }
.inline-form label { font-size: 0.9rem; }
.inline-form input { display: block; padding: 8px; border: 1px solid var(--border); border-radius: 8px; margin-top: 4px; }

.progress-bar-outer { background: #e5e7eb; border-radius: 999px; height: 18px; overflow: hidden; }
.progress-bar-inner { background: var(--green); height: 100%; transition: width .3s; }
.progress-bar-inner.alt { background: var(--primary); }

.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 10px 8px; border-bottom: 1px solid var(--border); text-align: left; font-size: 0.9rem; }

.alert-error { background: #fee2e2; color: #991b1b; padding: 10px 14px; border-radius: 8px; }
.alert-success { background: #dcfce7; color: #166534; padding: 10px 14px; border-radius: 8px; }

.site-footer { text-align: center; padding: 20px; color: var(--muted); }

@media (max-width: 600px) {
    .navbar { flex-direction: column; align-items: flex-start; }
    .nav-links a, .nav-user { margin-left: 0; margin-right: 12px; }
}