/* ============================================================
   Skin Care Product Customizer - Styles
   ============================================================ */

/* ---- Variables ---- */
:root {
    --skincare-primary: #2d6a4f;
    --skincare-primary-dark: #1b4332;
    --skincare-primary-light: #40916c;
    --skincare-secondary: #f4845f;
    --skincare-accent: #e9c46a;
    --skincare-bg: #fafaf8;
    --skincare-bg-alt: #f0f7f4;
    --skincare-text: #2d3436;
    --skincare-text-light: #636e72;
    --skincare-border: #dfe6e9;
    --skincare-border-light: #eef2f0;
    --skincare-white: #ffffff;
    --skincare-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    --skincare-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --skincare-radius: 16px;
    --skincare-radius-sm: 10px;
    --skincare-radius-xs: 6px;
    --skincare-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --skincare-font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

/* ---- Wrapper ---- */
.skincare-customizer-wrapper {
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px 20px;
    font-family: var(--skincare-font);
    color: var(--skincare-text);
    line-height: 1.6;
    background: var(--skincare-bg);
    border-radius: var(--skincare-radius);
}

.skincare-customizer-wrapper * {
    box-sizing: border-box;
}

.skincare-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
    background: linear-gradient(135deg, var(--skincare-bg-alt) 0%, var(--skincare-bg) 100%);
    border-radius: var(--skincare-radius);
    border: 1px solid var(--skincare-border-light);
}

.skincare-header h1 {
    font-size: 2.2em;
    font-weight: 700;
    color: var(--skincare-primary-dark);
    margin: 0 0 12px;
    line-height: 1.3;
}

.skincare-header p {
    font-size: 1.1em;
    color: var(--skincare-text-light);
    margin: 0;
    max-width: 700px;
    margin: 0 auto;
}

/* ---- Layout ---- */
.skincare-layout {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 30px;
    align-items: start;
}

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

/* ---- Form Panel ---- */
.skincare-form-panel {
    min-width: 0;
}

.skincare-section {
    background: var(--skincare-white);
    border: 1px solid var(--skincare-border-light);
    border-radius: var(--skincare-radius);
    padding: 28px 30px;
    margin-bottom: 24px;
    transition: box-shadow var(--skincare-transition);
}

.skincare-section:hover {
    box-shadow: var(--skincare-shadow);
}

.section-title {
    font-size: 1.25em;
    font-weight: 600;
    color: var(--skincare-primary-dark);
    margin: 0 0 8px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--skincare-bg-alt);
}

.section-subtitle {
    font-size: 0.9em;
    color: var(--skincare-text-light);
    margin: 0 0 18px;
}

.oil-count-hint {
    font-weight: 600;
    color: var(--skincare-primary);
}

/* ---- Product Base Options ---- */
.product-base-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
}

.base-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 18px 12px;
    border: 2px solid var(--skincare-border-light);
    border-radius: var(--skincare-radius-sm);
    cursor: pointer;
    transition: all var(--skincare-transition);
    text-align: center;
    position: relative;
}

.base-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.base-option:hover {
    border-color: var(--skincare-primary-light);
    background: var(--skincare-bg-alt);
}

.base-option:has(input:checked) {
    border-color: var(--skincare-primary);
    background: var(--skincare-bg-alt);
    box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.15);
}

.base-option .base-icon {
    font-size: 2em;
    line-height: 1;
}

.base-option .base-name {
    font-weight: 600;
    font-size: 0.95em;
    color: var(--skincare-text);
}

.base-option .base-desc {
    font-size: 0.78em;
    color: var(--skincare-text-light);
    line-height: 1.3;
}

/* ---- Essential Oils Grid ---- */
.oils-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
}

.oil-option {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 16px 14px;
    border: 2px solid var(--skincare-border-light);
    border-radius: var(--skincare-radius-sm);
    cursor: pointer;
    transition: all var(--skincare-transition);
    position: relative;
}

.oil-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.oil-option:hover {
    border-color: var(--skincare-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--skincare-shadow);
}

.oil-option:has(input:checked) {
    border-color: var(--skincare-primary);
    background: linear-gradient(135deg, var(--skincare-bg-alt), #e8f5e9);
    box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.12);
}

.oil-option .oil-icon {
    font-size: 1.5em;
    line-height: 1;
}

.oil-option .oil-name {
    font-weight: 600;
    font-size: 0.9em;
    color: var(--skincare-text);
}

.oil-option .oil-desc {
    font-size: 0.78em;
    color: var(--skincare-text-light);
    line-height: 1.3;
}

.oil-option .oil-benefit {
    display: inline-block;
    margin-top: 4px;
    font-size: 0.72em;
    font-weight: 500;
    color: var(--skincare-primary);
    background: rgba(45, 106, 79, 0.08);
    padding: 2px 10px;
    border-radius: 20px;
    align-self: flex-start;
}

.oil-option:has(input:checked) .oil-benefit {
    background: var(--skincare-primary);
    color: var(--skincare-white);
}

/* ---- Color Options ---- */
.color-options {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.color-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.color-preset {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    width: 70px;
    height: 70px;
    border-radius: var(--skincare-radius-sm);
    cursor: pointer;
    border: 3px solid transparent;
    transition: all var(--skincare-transition);
    position: relative;
    justify-content: center;
}

.color-preset input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.color-preset:hover {
    transform: scale(1.08);
}

.color-preset:has(input:checked) {
    border-color: var(--skincare-primary);
    box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.2);
    transform: scale(1.08);
}

.color-preset .color-label {
    font-size: 0.72em;
    color: var(--skincare-text-light);
    white-space: nowrap;
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity var(--skincare-transition);
}

.color-preset:has(input:checked) .color-label,
.color-preset:hover .color-label {
    opacity: 1;
}

.color-custom {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    padding-top: 8px;
    border-top: 1px solid var(--skincare-border-light);
}

.color-custom label {
    font-size: 0.9em;
    color: var(--skincare-text-light);
}

.color-custom input[type="color"] {
    width: 50px;
    height: 50px;
    padding: 2px;
    border: 2px solid var(--skincare-border);
    border-radius: var(--skincare-radius-xs);
    cursor: pointer;
    background: none;
}

/* ---- Allergens Grid ---- */
.allergens-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px;
    margin-bottom: 24px;
}

.allergen-option {
    display: flex;
    flex-direction: column;
    gap: 3px;
    padding: 14px 12px;
    border: 2px solid var(--skincare-border-light);
    border-radius: var(--skincare-radius-sm);
    cursor: pointer;
    transition: all var(--skincare-transition);
    position: relative;
}

.allergen-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.allergen-option:hover {
    border-color: var(--skincare-secondary);
    background: #fff5f0;
}

.allergen-option:has(input:checked) {
    border-color: #e17055;
    background: #fff5f0;
    box-shadow: 0 0 0 3px rgba(225, 112, 85, 0.12);
}

.allergen-option .allergen-icon {
    font-size: 1.3em;
    line-height: 1;
}

.allergen-option .allergen-name {
    font-weight: 600;
    font-size: 0.85em;
    color: var(--skincare-text);
}

.allergen-option .allergen-desc {
    font-size: 0.75em;
    color: var(--skincare-text-light);
}

/* ---- Sensitivity ---- */
.sensitivity-section {
    margin: 20px 0;
    padding: 20px;
    background: var(--skincare-bg-alt);
    border-radius: var(--skincare-radius-sm);
}

.sensitivity-section h3 {
    font-size: 1em;
    font-weight: 600;
    color: var(--skincare-primary-dark);
    margin: 0 0 16px;
}

.sensitivity-slider-container {
    position: relative;
}

.sensitivity-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.82em;
    color: var(--skincare-text-light);
    margin-bottom: 6px;
}

.sensitivity-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(to right, #40916c, #f4845f, #e17055);
    outline: none;
    transition: opacity var(--skincare-transition);
    cursor: pointer;
}

.sensitivity-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--skincare-white);
    border: 3px solid var(--skincare-primary);
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
    transition: all var(--skincare-transition);
}

.sensitivity-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.sensitivity-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--skincare-white);
    border: 3px solid var(--skincare-primary);
    cursor: pointer;
}

.sensitivity-value {
    text-align: center;
    margin-top: 12px;
    font-weight: 600;
    font-size: 1em;
    color: var(--skincare-primary-dark);
}

/* ---- Additional Notes ---- */
.additional-notes {
    margin-top: 16px;
}

.additional-notes label {
    display: block;
    font-weight: 500;
    font-size: 0.9em;
    color: var(--skincare-text);
    margin-bottom: 8px;
}

.additional-notes textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--skincare-border);
    border-radius: var(--skincare-radius-xs);
    font-family: var(--skincare-font);
    font-size: 0.9em;
    color: var(--skincare-text);
    resize: vertical;
    transition: border-color var(--skincare-transition);
    background: var(--skincare-bg);
}

.additional-notes textarea:focus {
    outline: none;
    border-color: var(--skincare-primary);
    box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.1);
}

/* ---- Product Name Input ---- */
.product-name-input {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.product-name-input label {
    font-weight: 500;
    font-size: 0.95em;
    color: var(--skincare-text);
}

.skincare-input {
    padding: 14px 18px;
    border: 2px solid var(--skincare-border);
    border-radius: var(--skincare-radius-xs);
    font-family: var(--skincare-font);
    font-size: 1em;
    color: var(--skincare-text);
    transition: border-color var(--skincare-transition);
    background: var(--skincare-bg);
    width: 100%;
    max-width: 450px;
}

.skincare-input:focus {
    outline: none;
    border-color: var(--skincare-primary);
    box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.1);
}

/* ---- Form Actions ---- */
.skincare-form-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 10px;
}

/* ---- Buttons ---- */
.skincare-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-family: var(--skincare-font);
    font-size: 1em;
    font-weight: 600;
    border: none;
    border-radius: var(--skincare-radius-sm);
    cursor: pointer;
    transition: all var(--skincare-transition);
    text-decoration: none;
    line-height: 1.2;
}

.skincare-btn .btn-icon {
    font-size: 1.2em;
}

.skincare-btn-primary {
    background: linear-gradient(135deg, var(--skincare-primary), var(--skincare-primary-light));
    color: var(--skincare-white);
    box-shadow: 0 4px 15px rgba(45, 106, 79, 0.3);
}

.skincare-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(45, 106, 79, 0.4);
    background: linear-gradient(135deg, var(--skincare-primary-dark), var(--skincare-primary));
}

.skincare-btn-secondary {
    background: var(--skincare-white);
    color: var(--skincare-text);
    border: 2px solid var(--skincare-border);
}

.skincare-btn-secondary:hover {
    background: var(--skincare-bg-alt);
    border-color: var(--skincare-primary-light);
    color: var(--skincare-primary);
}

/* ============================================================
   CHART / SUMMARY PANEL
   ============================================================ */
.skincare-chart-panel {
    position: relative;
}

.chart-sticky {
    position: sticky;
    top: 20px;
    background: var(--skincare-white);
    border: 1px solid var(--skincare-border-light);
    border-radius: var(--skincare-radius);
    padding: 24px;
    box-shadow: var(--skincare-shadow);
}

.chart-sticky .section-title {
    margin-bottom: 20px;
}

.product-preview-card {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Color Preview */
.preview-color-container {
    display: flex;
    justify-content: center;
    margin-bottom: 8px;
}

.preview-bottle {
    width: 100px;
    height: 140px;
    border-radius: 20px 20px 30px 30px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1), inset 0 -10px 30px rgba(0,0,0,0.05);
    transition: background var(--skincare-transition);
    overflow: hidden;
}

.preview-bottle-shine {
    position: absolute;
    top: 10%;
    left: 10%;
    width: 30%;
    height: 30%;
    background: linear-gradient(135deg, rgba(255,255,255,0.4), transparent);
    border-radius: 50%;
}

.preview-bottle-icon {
    font-size: 2.5em;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.preview-product-name {
    text-align: center;
    font-size: 1.15em;
    font-weight: 700;
    color: var(--skincare-primary-dark);
    margin: 0;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--skincare-border-light);
}

/* Preview Items */
.preview-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.9em;
}

.preview-label {
    font-weight: 600;
    color: var(--skincare-text-light);
    flex-shrink: 0;
    min-width: 110px;
}

.preview-value {
    color: var(--skincare-text);
    font-weight: 500;
}

.preview-color-swatch {
    display: inline-block;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--skincare-border);
    flex-shrink: 0;
    margin-left: auto;
}

/* Preview Oils */
.preview-oils {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.preview-oil-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--skincare-bg-alt);
    color: var(--skincare-primary-dark);
    padding: 3px 12px 3px 8px;
    border-radius: 20px;
    font-size: 0.82em;
    font-weight: 500;
    border: 1px solid rgba(45, 106, 79, 0.15);
}

.preview-empty {
    color: var(--skincare-text-light);
    font-style: italic;
    font-size: 0.9em;
}

/* Composition Chart */
.composition-chart {
    padding: 16px;
    background: var(--skincare-bg-alt);
    border-radius: var(--skincare-radius-sm);
}

.composition-chart h4 {
    font-size: 0.9em;
    font-weight: 600;
    color: var(--skincare-primary-dark);
    margin: 0 0 12px;
}

.composition-bars {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.composition-bar-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.composition-bar-label {
    font-size: 0.78em;
    font-weight: 500;
    color: var(--skincare-text);
    min-width: 80px;
    flex-shrink: 0;
}

.composition-bar-track {
    flex: 1;
    height: 12px;
    background: var(--skincare-border-light);
    border-radius: 6px;
    overflow: hidden;
}

.composition-bar-fill {
    height: 100%;
    border-radius: 6px;
    background: linear-gradient(90deg, var(--skincare-primary-light), var(--skincare-primary));
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.composition-bar-pct {
    font-size: 0.78em;
    font-weight: 600;
    color: var(--skincare-text-light);
    min-width: 35px;
    text-align: right;
}

/* Preview Allergens */
.preview-allergens-list {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.preview-allergen-tag {
    display: inline-block;
    background: #fff5f0;
    color: #e17055;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.78em;
    font-weight: 500;
    border: 1px solid rgba(225, 112, 85, 0.2);
}

/* Safety Notice */
.preview-safety-notice {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 14px;
    background: #fffde7;
    border: 1px solid #fff3cd;
    border-radius: var(--skincare-radius-sm);
    font-size: 0.82em;
    color: #856404;
    line-height: 1.4;
    margin-top: 8px;
}

.safety-icon {
    font-size: 1.2em;
    flex-shrink: 0;
}

/* Chart Actions */
.chart-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--skincare-border-light);
}

.chart-actions .skincare-btn {
    justify-content: center;
    width: 100%;
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .skincare-customizer-wrapper {
        padding: 16px;
    }

    .skincare-header h1 {
        font-size: 1.6em;
    }

    .skincare-section {
        padding: 20px;
    }

    .product-base-options {
        grid-template-columns: repeat(2, 1fr);
    }

    .oils-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .allergens-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .color-presets {
        justify-content: center;
    }

    .chart-sticky {
        position: static;
    }

    .preview-item {
        flex-wrap: wrap;
    }

    .preview-label {
        min-width: 100%;
    }
}

@media (max-width: 480px) {
    .product-base-options {
        grid-template-columns: repeat(2, 1fr);
    }

    .oils-grid {
        grid-template-columns: 1fr;
    }

    .allergens-grid {
        grid-template-columns: 1fr;
    }

    .skincare-btn {
        width: 100%;
        justify-content: center;
    }

    .skincare-form-actions {
        flex-direction: column;
    }
}

/* ---- Animations ---- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.skincare-section {
    animation: fadeInUp 0.5s ease forwards;
}

.skincare-section:nth-child(2) { animation-delay: 0.1s; }
.skincare-section:nth-child(3) { animation-delay: 0.2s; }
.skincare-section:nth-child(4) { animation-delay: 0.3s; }
.skincare-section:nth-child(5) { animation-delay: 0.4s; }

/* Notification Toast */
.skincare-toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 16px 24px;
    border-radius: var(--skincare-radius-sm);
    font-family: var(--skincare-font);
    font-weight: 500;
    font-size: 0.95em;
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
    z-index: 999999;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.skincare-toast.show {
    transform: translateY(0);
    opacity: 1;
}

.skincare-toast.success {
    background: var(--skincare-primary);
    color: var(--skincare-white);
}

.skincare-toast.error {
    background: #e17055;
    color: var(--skincare-white);
}

.skincare-toast.info {
    background: var(--skincare-primary-dark);
    color: var(--skincare-white);
}