:root {
    --ink: #1a1a2e;
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --danger: #dc2626;
    --danger-dark: #b91c1c;
    --bg: #f8fafc;
    --border: #e2e8f0;
    --muted: #64748b;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--ink);
    background: var(--bg);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 880px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* Navbar */
.navbar {
    background: var(--ink);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 1.25rem;
    max-width: 880px;
    margin: 0 auto;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.2rem;
    color: #fff;
    text-decoration: none;
}

.navbar-links a {
    color: #cbd5e1;
    text-decoration: none;
    margin-left: 1.25rem;
}

.navbar-links a:hover {
    color: #fff;
}

main {
    flex: 1;
    padding: 2rem 0;
}

/* Hero */
.hero {
    text-align: center;
    padding: 2.5rem 1rem;
}

.hero h1 {
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
}

.hero p {
    color: var(--muted);
    margin-bottom: 1.5rem;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.info-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
}

.info-card h3 {
    margin-top: 0;
    color: var(--primary);
}

/* Page header */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.page-header h1 {
    margin: 0;
    font-size: 1.6rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--ink);
    text-decoration: none;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.15s;
}

.btn:hover {
    background: #f1f5f9;
}

.btn-sm {
    padding: 0.3rem 0.7rem;
    font-size: 0.85rem;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-danger {
    background: var(--danger);
    color: #fff;
    border-color: var(--danger);
}

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

/* Table */
.table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.table th,
.table td {
    padding: 0.8rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.table th {
    background: #f1f5f9;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--muted);
}

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

.table tr.done .title-cell {
    text-decoration: line-through;
    color: var(--muted);
}

.actions-col {
    text-align: right;
    white-space: nowrap;
}

.inline-form {
    display: inline;
}

.toggle-btn {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0;
}

.empty-state {
    text-align: center;
    color: var(--muted);
    padding: 3rem 1rem;
    background: #fff;
    border: 1px dashed var(--border);
    border-radius: 12px;
}

/* Forms */
.form-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    max-width: 520px;
}

.form-group {
    margin-bottom: 1.1rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.form-control {
    width: 100%;
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 400;
}

.form-actions {
    display: flex;
    gap: 0.6rem;
    margin-top: 1.25rem;
}

.validation-error,
.validation-summary {
    color: var(--danger);
    font-size: 0.875rem;
}

.validation-summary ul {
    margin: 0;
    padding-left: 1.2rem;
}

.detail-list {
    margin: 1rem 0;
}

.detail-list dt {
    font-weight: 600;
    color: var(--muted);
    font-size: 0.85rem;
}

.detail-list dd {
    margin: 0 0 0.8rem 0;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border);
    padding: 1.25rem 0;
    color: var(--muted);
    font-size: 0.9rem;
    text-align: center;
}

.text-danger {
    color: var(--danger);
}

code {
    background: #f1f5f9;
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
    font-size: 0.9em;
}