:root {
    color-scheme: light;
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: #f2f4f8;
    color: #1b1b1b;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0 0 4rem;
}

.hero {
    background: linear-gradient(120deg, #0f3d91, #1f73d2);
    color: #fff;
    padding: 2.5rem 2rem;
    text-align: center;
}

.hero h1 {
    margin: 0 0 0.5rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    padding: 2rem;
}

.card {
    background: #fff;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 8px 20px rgba(15, 61, 145, 0.08);
}

.card.wide {
    grid-column: 1 / -1;
}

label {
    display: block;
    margin-bottom: 1rem;
    font-weight: 600;
    color: #1f3f75;
}

input,
select,
textarea {
    width: 100%;
    margin-top: 0.5rem;
    padding: 0.65rem 0.75rem;
    border-radius: 8px;
    border: 1px solid #ccd4e4;
    font-size: 0.95rem;
}

button {
    background: #1f73d2;
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 0.75rem 1.25rem;
    font-weight: 700;
    cursor: pointer;
}

button:hover {
    background: #1454a3;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th,
td {
    border-bottom: 1px solid #e0e6f2;
    padding: 0.75rem;
    text-align: left;
}

.messages {
    margin: 1.5rem 2rem 0;
    padding: 1rem 1.5rem;
    border-radius: 10px;
}

.messages.success {
    background: #e9f7ef;
    color: #216e43;
}

.messages.error {
    background: #fdecea;
    color: #9d2d2d;
}

.session-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    background: #f5f8ff;
    padding: 1rem;
    border-radius: 10px;
}