:root {
    --primary-color: #0070b8;
    --primary-hover: #1e415f;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-color: #212529;
    --text-muted: #6c757d;
    --border-color: #dee2e6;
    --accent-color: #e9ecef;
    --badge-bg: #fff3cd;
    --badge-text: #856404;
    --badge-border: #ffeeba;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 2rem 1rem 1.5rem;
    text-align: center;
}

header h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

header p {
    color: var(--text-muted);
    font-size: 1rem;
}

main {
    max-width: 760px;
    margin: 2rem auto;
    padding: 0 1rem;
    flex: 1;
}

.disclaimer-banner {
    background-color: var(--badge-bg);
    color: var(--badge-text);
    border: 1px solid var(--badge-border);
    padding: 0.85rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    text-align: center;
}

.hero-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
    margin-bottom: 1.5rem;
    text-align: center;
}

.hero-card h2 {
    font-size: 1.3rem;
    margin-bottom: 0.75rem;
}

.hero-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.subscribe-box {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1.5rem 0 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}

.ics-input-group {
    display: flex;
    width: 100%;
    max-width: 580px;
    gap: 0.5rem;
}

.ics-input-group input {
    flex: 1;
    padding: 0.7rem 0.9rem;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    outline: none;
    background: #fff;
}

.btn-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
}

.btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.7rem 1.2rem;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.15s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn:hover {
    background-color: var(--primary-hover);
}

.btn-secondary {
    background-color: #ffffff;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--accent-color);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.feature-card {
    background: var(--card-bg);
    padding: 1.25rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.feature-card h3 {
    font-size: 1rem;
    color: var(--primary-color);
    margin-bottom: 0.4rem;
}

.feature-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
}

.instructions {
    margin-bottom: 1.5rem;
    background: var(--card-bg);
    padding: 1.75rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.instructions h3 {
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
}

.instructions ol {
    padding-left: 1.2rem;
}

.instructions li {
    margin-bottom: 0.6rem;
    font-size: 0.9rem;
    color: var(--text-color);
}

footer {
    text-align: center;
    padding: 1.5rem 1rem;
    color: var(--text-muted);
    font-size: 0.82rem;
    border-top: 1px solid var(--border-color);
    background: var(--card-bg);
    margin-top: auto;
}

footer a {
    color: var(--text-muted);
}

@media (max-width: 600px) {
    .ics-input-group {
        flex-direction: column;
    }
    .btn-group {
        flex-direction: column;
    }
    .btn {
        width: 100%;
    }
}