*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
    --color-primary: #9ACD32;
    --color-primary-hover: #8BBE22;
    --color-primary-light: #F0F8E0;
    --color-accent: #9ACD32;
    --color-bg: #F5F5F3;
    --color-surface: #FFFFFF;
    --color-text: #212121;
    --color-text-secondary: #6B7280;
    --color-border: #E5E7EB;
    --color-error: #DC2626;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-card: 0 1px 3px rgba(0,0,0,0.08);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}
body { font-family: var(--font); background: var(--color-bg); color: var(--color-text); line-height: 1.5; -webkit-font-smoothing: antialiased; }

/* Layout */
.configurator { display: grid; grid-template-columns: 3fr 2fr; min-height: 100vh; }
.configurator__options { padding: 2rem 2.5rem; overflow-y: auto; }
.configurator__preview { background: #CFC9C7; padding: 2rem; display: flex; align-items: center; justify-content: center; }
.preview-sticky { text-align: center; width: 100%; }
.preview-image-wrapper { position: relative; width: 100%; display: inline-block; }
.preview-image-wrapper::after { content: ''; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(to top, #CFC9C7 0%, transparent 30%), linear-gradient(to right, #CFC9C7 0%, transparent 20%), linear-gradient(to left, #CFC9C7 0%, transparent 15%), linear-gradient(to bottom, #CFC9C7 0%, transparent 15%); }
.preview-sticky img { width: 100%; height: auto; display: block; transition: opacity 0.25s ease; }

/* Header */
.config-header { margin-bottom: 2rem; }
.config-header h1 { font-size: 1.75rem; font-weight: 700; }
.config-header p { font-size: 0.9rem; color: var(--color-text-secondary); margin-top: 0.25rem; }

/* Sections */
.config-section { margin-bottom: 1.75rem; }
.config-section__title { font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text-secondary); margin-bottom: 0.75rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--color-border); }

/* Color Swatches */
.color-swatches { display: flex; gap: 1rem; }
.color-swatch { display: flex; flex-direction: column; align-items: center; gap: 0.4rem; cursor: pointer; transition: transform 0.15s ease; }
.color-swatch:hover { transform: translateY(-2px); }
.color-swatch__circle { width: 48px; height: 48px; border-radius: 50%; border: 2px solid var(--color-border); transition: box-shadow 0.2s ease, border-color 0.2s ease; }
.color-swatch.active .color-swatch__circle { border-color: var(--color-primary); box-shadow: 0 0 0 3px var(--color-primary-light), 0 0 0 5px var(--color-primary); }
.color-swatch__label { font-size: 0.75rem; font-weight: 500; color: var(--color-text-secondary); }
.color-swatch.active .color-swatch__label { color: var(--color-primary); font-weight: 600; }

/* Option Pills */
.option-pills { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.option-pill { cursor: pointer; }
.option-pill input { display: none; }
.option-pill__inner { display: inline-block; padding: 0.55rem 1.25rem; border: 2px solid var(--color-border); border-radius: 100px; font-size: 0.85rem; font-weight: 500; color: var(--color-text); background: var(--color-surface); transition: all 0.2s ease; }
.option-pill__inner:hover { border-color: var(--color-primary); background: var(--color-primary-light); }
.option-pill input:checked + .option-pill__inner { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

/* Option Cards */
.option-cards { display: grid; gap: 0.75rem; }
.option-cards--2col { grid-template-columns: 1fr 1fr; }
.option-cards--3col { grid-template-columns: 1fr 1fr 1fr; }
.option-card { cursor: pointer; }
.option-card input { display: none; }
.option-card__inner { display: flex; flex-direction: column; align-items: center; gap: 0.25rem; padding: 1rem 0.75rem; border: 2px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); text-align: center; transition: all 0.2s ease; }
.option-card__inner:hover { border-color: var(--color-primary); box-shadow: var(--shadow-card); }
.option-card input:checked + .option-card__inner { border-color: var(--color-primary); background: var(--color-primary-light); }
.option-card__label { font-size: 0.85rem; font-weight: 600; color: var(--color-text); }
.option-card__desc { font-size: 0.7rem; color: var(--color-text-secondary); }

/* Meters Input */
.meters-group { display: flex; align-items: center; max-width: 200px; }
.meters-btn { width: 44px; height: 44px; border: 2px solid var(--color-border); background: var(--color-surface); font-size: 1.25rem; font-weight: 600; color: var(--color-text); cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all 0.15s ease; }
.meters-btn:hover { background: var(--color-primary-light); border-color: var(--color-primary); }
.meters-btn--minus { border-radius: var(--radius-sm) 0 0 var(--radius-sm); border-right: none; }
.meters-btn--plus  { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; border-left: none; }
.meters-input { width: 80px; height: 44px; border: 2px solid var(--color-border); text-align: center; font-size: 1rem; font-weight: 600; font-family: var(--font); color: var(--color-text); outline: none; -moz-appearance: textfield; }
.meters-input::-webkit-outer-spin-button, .meters-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.meters-input:focus { border-color: var(--color-primary); }
.meters-hint { display: block; margin-top: 0.4rem; font-size: 0.75rem; color: var(--color-text-secondary); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; width: 100%; padding: 0.85rem 1.5rem; border: none; border-radius: var(--radius-md); font-family: var(--font); font-size: 0.95rem; font-weight: 600; cursor: pointer; transition: all 0.2s ease; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-success { background: var(--color-accent); color: #fff; }
.btn-success:hover { background: var(--color-primary-hover); }
.btn-success:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-back { background: none; border: none; color: var(--color-primary); font-family: var(--font); font-size: 0.85rem; font-weight: 500; cursor: pointer; padding: 0.5rem 0; margin-bottom: 0.75rem; }
.btn-back:hover { text-decoration: underline; }

/* Customer Form */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.form-field--full { grid-column: 1 / -1; }
.form-field label { display: block; font-size: 0.8rem; font-weight: 500; color: var(--color-text-secondary); margin-bottom: 0.3rem; }
.form-field input, .form-field select { width: 100%; padding: 0.6rem 0.85rem; border: 2px solid var(--color-border); border-radius: var(--radius-sm); font-family: var(--font); font-size: 0.9rem; color: var(--color-text); outline: none; background: var(--color-surface); transition: border-color 0.2s ease; }
.form-field input:focus, .form-field select:focus { border-color: var(--color-primary); }
.form-field select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 0.75rem center; padding-right: 2rem; }

/* GDPR */
.gdpr-field { margin-top: 0.5rem; }
.gdpr-label { display: flex; align-items: flex-start; gap: 0.5rem; font-size: 0.8rem; color: var(--color-text-secondary); cursor: pointer; }
.gdpr-label input[type="checkbox"] { margin-top: 0.2rem; accent-color: var(--color-primary); width: 16px; height: 16px; flex-shrink: 0; }
.gdpr-label a { color: var(--color-primary); text-decoration: underline; }

/* Errors */
.error-list { background: #FEF2F2; border: 1px solid #FECACA; border-radius: var(--radius-sm); padding: 0.75rem 1rem; margin-bottom: 1rem; list-style: none; }
.error-list li { font-size: 0.8rem; color: var(--color-error); padding: 0.15rem 0; }
.error-list li::before { content: "\2022"; margin-right: 0.4rem; }

/* Modal */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1000; align-items: center; justify-content: center; padding: 1rem; }
.modal-overlay.active { display: flex; }
.modal-card { background: var(--color-surface); border-radius: var(--radius-lg); padding: 2.5rem 2rem; max-width: 420px; width: 100%; text-align: center; box-shadow: 0 20px 60px rgba(0,0,0,0.15); animation: modalIn 0.3s ease; }
@keyframes modalIn { from { opacity: 0; transform: scale(0.9) translateY(20px); } to { opacity: 1; transform: scale(1) translateY(0); } }
.modal-icon { width: 56px; height: 56px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; font-size: 1.5rem; margin-bottom: 1rem; }
.modal-icon--success { background: #DCFCE7; color: #16A34A; }
.modal-icon--error { background: #FEE2E2; color: var(--color-error); }
.modal-card h2 { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.5rem; }
.modal-card p { font-size: 0.9rem; color: var(--color-text-secondary); margin-bottom: 1.5rem; }
.modal-card .btn { max-width: 200px; margin: 0 auto; }

/* Spinner */
.spinner { display: inline-block; width: 18px; height: 18px; border: 2px solid rgba(255,255,255,0.3); border-top-color: #fff; border-radius: 50%; animation: spin 0.6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.step-hidden { display: none; }

/* Responsive */
@media (max-width: 768px) {
    .configurator { grid-template-columns: 1fr; }
    .configurator__preview { border-bottom: 1px solid var(--color-border); padding: 1.25rem; }
    .preview-sticky { position: static; }
    .preview-sticky img { max-width: 100%; max-height: 220px; object-fit: contain; }
    .configurator__options { padding: 1.5rem 1.25rem; }
    .option-cards--3col { grid-template-columns: 1fr; }
    .form-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
    .option-cards--2col { grid-template-columns: 1fr; }
    .color-swatches { gap: 0.75rem; }
}