:root {
    color-scheme: light;
    --bg: #f4f7fb;
    --panel: #ffffff;
    --panel-border: #dbe4f0;
    --text: #122033;
    --muted: #5f6f82;
    --accent: #2f80ed;
    --open: #1f9d62;
    --stop: #f0a202;
    --close: #d64545;
    --shadow: 0 10px 30px rgba(18, 32, 51, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: linear-gradient(180deg, #f8fbff 0%, var(--bg) 100%);
    color: var(--text);
}

.page-shell {
    width: min(1100px, calc(100% - 1rem));
    margin: 0 auto;
    padding: 1rem 0 2rem;
}

.hero {
    padding: 1rem 0 0.75rem;
}

.eyebrow {
    margin: 0 0 0.35rem;
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero h1 {
    margin: 0;
    font-size: clamp(1.8rem, 5vw, 2.8rem);
}

.subtitle {
    margin: 0.5rem 0 0;
    color: var(--muted);
}

.status-banner {
    margin: 1rem 0 1.25rem;
    padding: 0.9rem 1rem;
    border-radius: 14px;
    background: #eaf2ff;
    border: 1px solid #cfe0ff;
    color: #23446f;
    box-shadow: var(--shadow);
}

.status-banner.success {
    background: #eaf8f0;
    border-color: #bee7cf;
    color: #18603e;
}

.status-banner.error {
    background: #fff0f0;
    border-color: #f1c0c0;
    color: #8d2d2d;
}

.status-banner.pending {
    background: #fff7e8;
    border-color: #f4db9f;
    color: #7a5600;
}

.shutter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
}

.shutter-card {
    background: var(--panel);
    border: 1px solid var(--panel-border);
    border-radius: 18px;
    padding: 1rem;
    box-shadow: var(--shadow);
}

.card-head {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.card-head h2 {
    margin: 0;
    font-size: 1.15rem;
}

.card-head p {
    margin: 0.3rem 0 0;
    color: var(--muted);
}

.shutter-badge {
    padding: 0.3rem 0.55rem;
    border-radius: 999px;
    background: #eef4ff;
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: capitalize;
}

.actions {
    display: grid;
    gap: 0.65rem;
}

.action-btn {
    width: 100%;
    border: 0;
    border-radius: 12px;
    padding: 0.95rem 1rem;
    color: white;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.12s ease, opacity 0.12s ease;
}

.action-btn:active {
    transform: scale(0.98);
}

.action-btn:disabled {
    cursor: wait;
    opacity: 0.65;
}

.open-btn {
    background: var(--open);
}

.stop-btn {
    background: var(--stop);
}

.close-btn {
    background: var(--close);
}

@media (max-width: 640px) {
    .page-shell {
        width: min(100%, calc(100% - 0.8rem));
        padding-top: 0.5rem;
    }

    .shutter-card {
        padding: 0.9rem;
    }

    .action-btn {
        min-height: 3.2rem;
    }
}