/* ========================================
   ROCOCO FLOORING — Landing Page
   Brand: Burgundy Maroon + Warm Cream
   Style: Clean, Minimal, Premium
   ======================================== */

:root {
    --maroon: #68302f;
    --maroon-dark: #522625;
    --maroon-light: #8A403F;
    --cream: #E5C5A0;
    --cream-light: #F2E4D0;
    --cream-pale: #FAF5EE;
    --bg: #FFFFFF;
    --bg-warm: #FDFBF8;
    --text-dark: #2C1A1F;
    --text-body: #5A4348;
    --text-light: #9A8488;
    --border: rgba(131, 46, 44, 0.1);
    --border-hover: rgba(131, 46, 44, 0.25);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.25s ease;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Noto Sans Thai', 'Inter', -apple-system, sans-serif;
    background: var(--bg-warm);
    color: var(--text-dark);
    min-height: 100vh;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ======== HEADER ======== */
.header {
    padding: 36px 0 20px;
    text-align: center;
    background: var(--maroon);
    color: var(--cream);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-bottom: 6px;
}

.logo-icon {
    opacity: 0.9;
}

.logo-text {
    font-family: 'Inter', serif;
    font-size: 26px;
    font-weight: 700;
    letter-spacing: 8px;
    color: var(--cream);
    line-height: 1;
}

.logo-tagline {
    font-family: 'Inter', sans-serif;
    font-size: 10px;
    font-weight: 400;
    letter-spacing: 6px;
    color: var(--cream);
    opacity: 0.65;
    margin-top: 3px;
}

.header-subtitle {
    font-size: 13px;
    color: var(--cream);
    opacity: 0.5;
    margin-top: 8px;
}

/* ======== QR SCAN BANNER ======== */
.qr-banner {
    background: linear-gradient(135deg, var(--maroon), var(--maroon-dark));
    border-bottom: 2px solid var(--cream);
}

.qr-banner-inner {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 0;
    font-size: 14px;
    color: var(--cream);
    animation: fadeIn 0.4s ease;
}

.qr-icon {
    font-size: 18px;
}

.qr-banner-close {
    margin-left: auto;
    background: none;
    border: none;
    color: var(--cream);
    opacity: 0.6;
    font-size: 20px;
    cursor: pointer;
    padding: 0 4px;
    line-height: 1;
    transition: var(--transition);
}

.qr-banner-close:hover {
    opacity: 1;
}

/* ======== MAIN CONTENT ======== */
.main-content {
    padding: 32px 0 48px;
}

/* ======== CALCULATOR CARD ======== */
.calculator-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: 0 2px 16px rgba(131, 46, 44, 0.04);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}

.card-icon {
    color: var(--maroon);
    display: flex;
}

.card-header h2 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-dark);
}

/* ======== FORM ======== */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 18px;
}

.form-grid.three-cols {
    grid-template-columns: 1fr 1fr 1fr;
}

.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-body);
    margin-bottom: 5px;
}

.label-icon {
    color: var(--maroon);
    font-size: 7px;
    vertical-align: middle;
    margin-right: 3px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 11px 13px;
    background: var(--bg-warm);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-dark);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
    appearance: none;
    -webkit-appearance: none;
}

.form-group select {
    background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%236D2C3C' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 13px center;
    padding-right: 34px;
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--maroon);
    box-shadow: 0 0 0 3px rgba(131, 46, 44, 0.06);
    background: var(--bg);
}

.form-group input::placeholder {
    color: var(--text-light);
}

/* Customer Section */
.customer-section {
    margin-bottom: 18px;
}

.section-divider {
    display: flex;
    align-items: center;
    margin: 18px 0 14px;
}

.section-divider::before,
.section-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.section-divider span {
    padding: 0 12px;
    font-size: 11px;
    color: var(--text-light);
    white-space: nowrap;
}

/* Pricing Info */
.pricing-info {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.pricing-item {
    flex: 1;
    min-width: 110px;
    background: var(--cream-pale);
    border: 1px solid rgba(229, 197, 160, 0.3);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    text-align: center;
}

.pricing-label {
    display: block;
    font-size: 11px;
    color: var(--text-light);
    margin-bottom: 3px;
}

.pricing-value {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--maroon);
}

/* Calculate Button */
.btn-calculate {
    width: 100%;
    padding: 13px;
    background: var(--maroon);
    color: var(--cream);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
    letter-spacing: 0.5px;
}

.btn-calculate:hover {
    background: var(--maroon-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(131, 46, 44, 0.2);
}

.btn-calculate:active {
    transform: translateY(0);
}

.btn-calculate:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ======== RESULT CARD ======== */
.result-wrapper {
    margin-top: 28px;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.result-card {
    width: 480px;
    max-width: 100%;
    margin: 0 auto;
    background: var(--maroon);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(131, 46, 44, 0.15);
}

.result-inner {
    padding: 0;
}

.result-header {
    padding: 22px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(229, 197, 160, 0.15);
}

.result-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.result-brand {
    display: block;
    font-family: 'Inter', serif;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--cream);
}

.result-subtitle {
    display: block;
    font-size: 10px;
    color: var(--cream);
    opacity: 0.5;
    margin-top: 2px;
    letter-spacing: 1px;
}

.result-code {
    font-family: 'Inter', monospace;
    font-size: 11px;
    font-weight: 600;
    color: var(--cream);
    background: rgba(229, 197, 160, 0.12);
    padding: 5px 10px;
    border-radius: 6px;
    border: 1px solid rgba(229, 197, 160, 0.15);
    letter-spacing: 1px;
}

.result-body {
    padding: 18px 24px;
}

.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 9px 0;
    font-size: 13px;
}

.result-row.highlight {
    background: rgba(229, 197, 160, 0.06);
    margin: 0 -24px;
    padding: 11px 24px;
}

.result-label {
    color: var(--cream);
    opacity: 0.7;
}

.result-value {
    font-weight: 600;
    color: var(--cream);
}

.result-divider {
    height: 1px;
    background: rgba(229, 197, 160, 0.1);
    margin: 3px 0;
}

.result-row.total {
    padding: 13px 0 0;
    border-top: 1px solid rgba(229, 197, 160, 0.2);
    margin-top: 6px;
}

.result-row.total .result-label {
    font-size: 15px;
    font-weight: 700;
    color: var(--cream);
    opacity: 1;
}

.result-row.total .result-value {
    font-size: 22px;
    font-weight: 800;
    color: var(--cream-light);
}

.result-footer {
    padding: 14px 24px 18px;
    border-top: 1px solid rgba(229, 197, 160, 0.08);
}

.result-note {
    font-size: 11px;
    color: var(--cream);
    opacity: 0.6;
    margin-bottom: 3px;
    font-style: italic;
}

.result-date {
    font-size: 10px;
    color: var(--cream);
    opacity: 0.4;
    margin-bottom: 3px;
}

.result-disclaimer {
    font-size: 10px;
    color: var(--cream);
    opacity: 0.35;
}

/* Result Actions */
.result-actions {
    display: flex;
    gap: 10px;
    margin-top: 18px;
    justify-content: center;
}

.btn-save,
.btn-new {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 11px 22px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
}

.btn-save {
    background: var(--maroon);
    color: var(--cream);
}

.btn-save:hover {
    background: var(--maroon-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(131, 46, 44, 0.2);
}

.btn-new {
    background: var(--bg);
    color: var(--text-body);
    border: 1px solid var(--border);
}

.btn-new:hover {
    border-color: var(--border-hover);
    color: var(--maroon);
}

/* ======== FOOTER ======== */
.footer {
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid var(--border);
}

.footer p {
    font-size: 11px;
    color: var(--text-light);
}

/* ======== LOADING ======== */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(2px);
}

.loading-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border);
    border-top: 3px solid var(--maroon);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ======== TOAST ======== */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 12px 18px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    z-index: 9999;
    animation: toastIn 0.3s ease;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.toast.success {
    background: var(--bg);
    color: #27AE60;
    border: 1px solid rgba(39, 174, 96, 0.2);
}

.toast.error {
    background: var(--bg);
    color: #E74C3C;
    border: 1px solid rgba(231, 76, 60, 0.2);
}

@keyframes toastIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ======== RESPONSIVE ======== */
@media (max-width: 640px) {
    .container { padding: 0 16px; }
    .header { padding: 28px 0 16px; }
    .logo-text { font-size: 22px; letter-spacing: 6px; }
    .calculator-card { padding: 20px; }
    .form-grid { grid-template-columns: 1fr; }
    .form-grid.three-cols { grid-template-columns: 1fr; }
    .pricing-info { flex-direction: column; }
    .result-card { width: 100%; }
    .result-row.total .result-value { font-size: 18px; }
    .result-actions { flex-direction: column; }
    .btn-save, .btn-new { justify-content: center; }
}