* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: system-ui, sans-serif;
}

body {
    background: linear-gradient(180deg, #f8fafc, #eef2ff);
    color: #0f172a;
}

/* ---------- HEADER ---------- */

.top-bar {
    padding: 56px 20px;
    text-align: center;
    background: linear-gradient(135deg, #38bdf8, #6366f1);
    color: white;
}

.top-bar h1 {
    font-size: 34px;
    margin-bottom: 8px;
}

.top-bar p {
    opacity: 0.9;
}

/* ---------- GRID ---------- */

.content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    padding: 48px 20px;
    max-width: 1100px;
    margin: auto;
}

/* ---------- CARD BASE ---------- */

.card {
    background: white;
    border-radius: 16px;
    padding: 26px;
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    text-decoration: none;
    color: inherit;
    position: relative;
}

/* ---------- ACTIVE CARD ---------- */

.card-active {
    border: 2px solid #6366f1;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

.card-active:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 40px rgba(99, 102, 241, 0.25);
}

/* ---------- DISABLED CARD ---------- */

.card-disabled {
    opacity: 0.6;
    cursor: default;
}

.card-disabled:hover {
    transform: none;
    box-shadow: none;
}

/* ---------- ICON ---------- */

.card .material-icons {
    font-size: 44px;
    margin-bottom: 14px;
    background: linear-gradient(135deg, #38bdf8, #6366f1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ---------- TEXT ---------- */

.card h3 {
    margin-bottom: 8px;
    font-size: 18px;
}

.card p {
    color: #475569;
    font-size: 14px;
    margin-bottom: 18px;
}

/* ---------- BUTTON ---------- */

.card button {
    background: linear-gradient(135deg, #38bdf8, #6366f1);
    border: none;
    color: white;
    padding: 10px 18px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
}

.card button:hover {
    filter: brightness(1.05);
}

/* ---------- BADGE ---------- */

.badge {
    display: inline-block;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 999px;
    background: #e5e7eb;
    color: #334155;
}

/* ---------- FOOTER ---------- */

footer {
    text-align: center;
    padding: 24px;
    color: #64748b;
    font-size: 14px;
}