:root {
    --bg: #f4f4ef;
    --panel: #ffffff;
    --ink: #1d1f23;
    --muted: #666e7b;
    --line: #dde1e8;
    --accent: #0f766e;
    --accent-2: #0b5c56;
    --warn: #c2410c;
    --good: #166534;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: "Avenir Next", "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at top right, #d6f3ee 0, transparent 35%),
        radial-gradient(circle at top left, #efe9d6 0, transparent 35%),
        var(--bg);
    color: var(--ink);
    min-height: 100vh;
    padding: 24px;
}

.ad-placeholder {
    display: grid;
    gap: 10px;
    text-decoration: none;
    color: var(--ink);
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 18px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}

.ad-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    font-weight: 700;
}

.ad-placeholder strong {
    font-size: 1.35rem;
    line-height: 1.1;
}

.ad-placeholder span {
    color: var(--muted);
}

.ad-cta {
    color: var(--accent) !important;
    font-weight: 700;
}

.ad-banner {
    grid-template-columns: auto 1fr auto;
    align-items: center;
}

.app {
    max-width: 800px;
    margin: 0 auto;
    display: grid;
    gap: 16px;
}

.hero {
    background: linear-gradient(120deg, #0f766e, #164e63);
    color: #fff;
    border-radius: 16px;
    padding: 14px 20px;
    box-shadow: var(--shadow);
}

.hero h1 {
    font-size: 2rem;
    margin-bottom: 0;
}

.panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 16px;
    box-shadow: var(--shadow);
}

h2 {
    margin-bottom: 12px;
}

.helper {
    color: var(--muted);
    font-size: 0.88rem;
}

form {
    display: grid;
    gap: 10px;
}

input,
textarea,
select,
button {
    font: inherit;
}

input,
textarea,
select {
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 10px 12px;
    background: #fff;
}

textarea {
    resize: vertical;
}

button {
    border: 0;
    border-radius: 10px;
    background: var(--accent);
    color: #fff;
    font-weight: 700;
    padding: 10px 12px;
    cursor: pointer;
}

button:hover {
    background: var(--accent-2);
}

.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.category-editor {
    display: grid;
    gap: 8px;
}

.category-row {
    display: grid;
    grid-template-columns: 1.4fr 1fr auto;
    gap: 8px;
}

.cards {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.card {
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 12px;
    background: #fbfcfe;
}

.card span {
    color: var(--muted);
    display: block;
    margin-bottom: 6px;
}

.card strong {
    font-size: 1.2rem;
}

.courses {
    display: grid;
    gap: 10px;
}

.course {
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 0;
    overflow: hidden;
}

.course-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.status {
    font-size: 0.8rem;
    border-radius: 999px;
    padding: 4px 8px;
    font-weight: 700;
}

.status.ok {
    background: #dcfce7;
    color: var(--good);
}

.status.warn {
    background: #ffedd5;
    color: var(--warn);
}

.metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin-bottom: 8px;
}

.metric {
    background: #f8fafc;
    border-radius: 8px;
    padding: 8px;
    border: 1px solid #e8ecf2;
}

.metric-label {
    color: var(--muted);
    font-size: 0.8rem;
}

.metric-value {
    font-weight: 700;
}

.notes {
    color: var(--muted);
    margin-bottom: 8px;
}

.actions {
    display: flex;
    gap: 8px;
}

.course-details > summary {
    list-style: none;
    cursor: pointer;
    padding: 12px;
}

.course-details > summary::-webkit-details-marker {
    display: none;
}

.course-summary {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr auto;
    gap: 8px;
    align-items: center;
}

.summary-title {
    font-weight: 700;
}

.course-open {
    border-top: 1px solid var(--line);
    padding: 12px;
    background: #fcfefe;
}

.course-weights {
    color: var(--muted);
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.assignment-wrap {
    margin: 10px 0;
    border-top: 1px dashed var(--line);
    padding-top: 10px;
}

.assignment-title {
    font-weight: 700;
    margin-bottom: 8px;
}

.assignment-form {
    display: grid;
    gap: 8px;
    margin-bottom: 8px;
}

.assignment-form-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr 1fr 1fr auto;
    gap: 8px;
}

.assignment-list {
    display: grid;
    gap: 6px;
}

.assignment-item {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 8px;
    align-items: center;
    border: 1px solid #e8ecf2;
    border-radius: 8px;
    padding: 8px;
    background: #fafcff;
}

.assignment-inline-form {
    grid-template-columns: 1.3fr 1.1fr 0.8fr 0.8fr auto;
}

.assignment-meta {
    color: var(--muted);
    font-size: 0.84rem;
}

.tiny {
    padding: 6px 8px;
    font-size: 0.8rem;
}

.secondary {
    background: #fff;
    color: var(--ink);
    border: 1px solid var(--line);
}

.secondary:hover {
    background: #f5f7fb;
}

.danger {
    background: #b91c1c;
}

.danger:hover {
    background: #991b1b;
}

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

@media (max-width: 700px) {
    .split,
    .cards,
    .metrics {
        grid-template-columns: 1fr;
    }

    .assignment-form-grid,
    .assignment-item,
    .category-row,
    .assignment-inline-form,
    .course-summary {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 820px) {
    .ad-banner {
        grid-template-columns: 1fr;
    }
}