:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --text-color: #1f2937;
    --light-text: #4b5563;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --warning-bg: #fef3c7;
    --warning-text: #92400e;
    --max-width: 800px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
    padding: 0 1rem;
}

header {
    max-width: var(--max-width);
    margin: 2rem auto;
    text-align: center;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1.5rem;
}

.logo {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
    letter-spacing: -0.025em;
}

.logo:hover {
    text-decoration: none;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--light-text);
    margin-top: 0.5rem;
}

main {
    max-width: var(--max-width);
    margin: 2rem auto;
    min-height: 60vh;
}

h1 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: #111827;
}

h2 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: #111827;
}

p {
    margin-bottom: 1.2rem;
    color: var(--text-color);
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.info-box {
    background-color: #eff6ff;
    border-left: 4px solid var(--primary-color);
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: 0 4px 4px 0;
    font-size: 0.95rem;
}

.placeholder-badge {
    display: inline-block;
    background-color: var(--warning-bg);
    color: var(--warning-text);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin: 2rem 0;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.card-title a {
    color: #111827;
    font-weight: 700;
}

.card-title a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.card-meta {
    font-size: 0.85rem;
    color: var(--light-text);
    margin-bottom: 1rem;
}

.card-desc {
    margin-bottom: 1rem;
}

.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white !important;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    text-align: center;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn:hover {
    background-color: var(--primary-hover);
    text-decoration: none;
}

.deal-detail {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    margin: 2rem 0;
}

.deal-meta-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

.deal-meta-table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.deal-meta-table td:first-child {
    font-weight: 600;
    color: var(--light-text);
    width: 35%;
}

.deal-price-section {
    background-color: #f3f4f6;
    padding: 1.5rem;
    border-radius: 6px;
    margin: 1.5rem 0;
    text-align: center;
}

.current-price {
    font-size: 2rem;
    font-weight: 800;
    color: #10b981;
}

.old-price {
    text-decoration: line-through;
    color: var(--light-text);
    margin-left: 0.75rem;
    font-size: 1.25rem;
}

.price-disclaimer {
    font-size: 0.8rem;
    color: var(--light-text);
    margin-top: 0.5rem;
}

footer {
    max-width: var(--max-width);
    margin: 3rem auto 2rem auto;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.9rem;
    color: var(--light-text);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--light-text);
}

.footer-links a:hover {
    color: var(--primary-color);
}

@media (max-width: 600px) {
    header {
        margin: 1.5rem auto;
    }
    
    .logo {
        font-size: 1.8rem;
    }
    
    .deal-detail {
        padding: 1.25rem;
    }
}