:root {
    --green: #1f7a4d;
    --green-soft: #e7f3ec;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #e5e7eb;
    --star: #fbbf24;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: #fff;
    color: var(--text);
}

.container {
    max-width: 820px;
    margin: 0 auto;
    padding: 24px;
}

h1 {
    margin-bottom: 8px;
}

.subtitle {
    margin-bottom: 32px;
    color: var(--muted);
}

.loader {
    padding: 40px;
    text-align: center;
    font-size: 18px;
}

.error {
    padding: 32px;
    border-radius: 12px;
    background: #fee2e2;
    color: #991b1b;
}

.success {
    padding: 32px;
    border-radius: 12px;
    background: var(--green-soft);
    color: var(--green);
}

.module {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
}

.module h3 {
    margin: 0;
    font-size: 18px;
}

.module p {
    margin: 6px 0 12px;
    color: var(--muted);
}

.stars {
    display: flex;
    gap: 6px;
}

.star {
    font-size: 26px;
    cursor: pointer;
    color: #d1d5db;
    user-select: none;
}

.star.active {
    color: var(--star);
}

.comment {
    margin-top: 24px;
}

textarea {
    width: 100%;
    min-height: 120px;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    font-size: 15px;
}

button {
    margin-top: 24px;
    padding: 14px 20px;
    font-size: 16px;
    border-radius: 12px;
    border: none;
    background: var(--green);
    color: #fff;
    cursor: pointer;
}

button:hover {
    opacity: .9;
}

@media (max-width: 600px) {
    h1 {
        font-size: 22px;
    }
}