:root {
    color-scheme: light;
    --bg: #f4f7fb;
    --card: #ffffff;
    --text: #112033;
    --muted: #5f6f82;
    --border: #d7e0ea;
    --accent: #165dff;
    --accent-soft: #e8f0ff;
    --success: #0f8a4b;
    --error: #b42318;
    --shadow: 0 18px 40px rgba(17, 32, 51, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Inter, Arial, sans-serif;
    background: linear-gradient(180deg, #eef4ff 0%, var(--bg) 100%);
    color: var(--text);
}

.page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 24px;
}

.hero {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: flex-start;
}

.eyebrow {
    margin: 0 0 8px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 700;
}

h1,
h2,
h3 {
    margin-top: 0;
}

.intro,
.empty-state,
.form-status {
    color: var(--muted);
}

.hero-meta {
    display: flex;
    gap: 16px;
}

.stat {
    min-width: 110px;
    border: 1px solid var(--border);
    background: var(--accent-soft);
    border-radius: 16px;
    padding: 14px 16px;
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.7rem;
    font-weight: 800;
}

.stat-label {
    display: block;
    margin-top: 4px;
    font-size: 0.92rem;
    color: var(--muted);
}

.planning-image {
    width: 100%;
    height: auto;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.layout {
    display: grid;
    gap: 24px;
    grid-template-columns: 1.15fr 0.85fr;
}

.field {
    display: grid;
    gap: 8px;
    margin-bottom: 20px;
}

.field input {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px 14px;
    font-size: 1rem;
}

.date-group {
    margin: 0 0 18px;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 16px;
}

.date-group legend {
    padding: 0 8px;
    font-weight: 700;
}

.session-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}

.session-option {
    display: flex;
    align-items: center;
    gap: 10px;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px;
    background: #fbfdff;
}

.session-option input {
    width: 18px;
    height: 18px;
}

.actions {
    display: flex;
    gap: 16px;
    align-items: center;
    flex-wrap: wrap;
}

button {
    border: 0;
    border-radius: 999px;
    background: var(--accent);
    color: white;
    padding: 12px 18px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
}

button:disabled {
    opacity: 0.7;
    cursor: wait;
}

.form-status.is-success {
    color: var(--success);
}

.form-status.is-error {
    color: var(--error);
}

.response-list,
.coverage-grid {
    display: grid;
    gap: 16px;
}

.response-card,
.coverage-card {
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 16px;
    background: #fcfdff;
}

.response-card ul,
.coverage-card ul {
    margin: 0;
    padding-left: 18px;
}

.coverage-card li {
    margin-bottom: 10px;
}

.coverage-card span {
    display: block;
    margin-top: 4px;
    color: var(--muted);
}

@media (max-width: 840px) {
    .hero,
    .layout {
        grid-template-columns: 1fr;
        display: grid;
    }

    .hero-meta {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        display: grid;
    }
}