:root {
    --primary: #001c3a;
    --primary-dark: #000e1f;
    --accent: #D4AF37;
    --accent-light: #F3E5AB;
    --bg-main: #121212;
    --bg-card: #1E1E1E;
    --text-main: #EEEEEE;
    --text-muted: #BBBBBB;
    --border: #333333;
    --success: #4CAF50;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'Sarabun', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
}

header {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow);
    border-bottom: 3px solid var(--accent);
}

header h1 {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

header p {
    font-weight: 300;
    opacity: 0.8;
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 2rem;
    padding: 0 1rem;
}

@media (max-width: 1024px) {
    .container {
        grid-template-columns: 1fr;
    }
}

main {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.card {
    background-color: var(--bg-card);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

input, select {
    width: 100%;
    padding: 0.75rem;
    background-color: #2A2A2A;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

input:focus, select:focus {
    border-color: var(--accent);
}

.inner-section {
    padding: 1rem;
    background-color: rgba(255,255,255,0.03);
    border-radius: 8px;
    margin-bottom: 1rem;
}

.inner-header {
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

/* Sidebar */
.results-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    position: sticky;
    top: 6rem;
    height: fit-content;
}

.cost-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
}

.breakdown-detail {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-left: 1rem;
    border-left: 2px solid var(--primary);
    padding-left: 0.75rem;
    margin-bottom: 0.5rem;
}

.total {
    border-top: 2px solid var(--border);
    margin-top: 1rem;
    padding-top: 1rem;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--accent);
}

.quotation-card {
    background-color: #FFFFFF;
    color: #333333;
}

.grand-total {
    text-align: center;
    margin-top: 2rem;
    background-color: var(--bg-main);
    padding: 1.5rem;
    border-radius: 8px;
    border: 2px dashed var(--accent);
}

.grand-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
}

.grand-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
}

footer {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 2rem;
}