:root {
    --brand-primary: #07a5f5;
    --brand-secondary: #25ed9f;
    --brand-background: #f4f7fb;
    --border-radius: 14px;
    --text-color: #1d1d1d;
}

* {
    box-sizing: border-box;
}

body {
    font-family: "Inter", "Segoe UI", sans-serif;
    margin: 0;
    min-height: 100vh;
    background: radial-gradient(circle at top, rgba(7, 165, 245, 0.18), transparent 50%), var(--brand-background);
    color: var(--text-color);
}

#client-shell {
    max-width: 960px;
    margin: 0 auto;
    padding: 24px;
}

.brand-header {
    display: flex;
    gap: 16px;
    align-items: center;
    margin-bottom: 32px;
}

.brand-header img {
    width: 64px;
    height: 64px;
}

.brand-slogan {
    font-size: 1.1rem;
    color: #555;
}

.card {
    background: #fff;
    border-radius: var(--border-radius);
    padding: 24px;
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.12);
    margin-bottom: 24px;
}

button {
    border: none;
    border-radius: var(--border-radius);
    padding: 12px 20px;
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: transform 150ms ease;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

button:hover:not(:disabled) {
    transform: translateY(-1px);
}

input,
select {
    width: 100%;
    padding: 12px;
    border-radius: var(--border-radius);
    border: 1px solid #d3d7e0;
    font-size: 1rem;
    margin-top: 8px;
}

.hidden {
    display: none;
}

.status-message {
    margin-bottom: 16px;
    padding: 12px 16px;
    border-radius: var(--border-radius);
    background: #fff7ef;
    color: #a04100;
    font-weight: 500;
}

.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.items-grid .item-card {
    border: 1px solid rgba(7, 165, 245, 0.1);
    padding: 16px;
    border-radius: var(--border-radius);
    background: #fff;
}