/* Apple 簡約風格 - 行銷成本計算器 */

:root {
    --primary-color: #007AFF;
    --secondary-color: #5856D6;
    --success-color: #34C759;
    --warning-color: #FF9500;
    --danger-color: #FF3B30;
    --background: #F5F5F7;
    --card-background: #FFFFFF;
    --text-primary: #1D1D1F;
    --text-secondary: #86868B;
    --border-color: #D2D2D7;
    --shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 4px 24px rgba(0, 0, 0, 0.12);
    --radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 48px;
}

header h1 {
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Card */
.card {
    background: var(--card-background);
    border-radius: var(--radius);
    padding: 32px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.card h2 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: -0.3px;
}

.card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
    margin-top: 32px;
    letter-spacing: -0.2px;
}

/* Input Section */
.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.input-group input {
    width: 100%;
    padding: 14px 16px;
    font-size: 16px;
    border: 1.5px solid var(--border-color);
    border-radius: 10px;
    background: var(--card-background);
    color: var(--text-primary);
    transition: var(--transition);
    font-family: inherit;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

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

.input-group small {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-secondary);
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    margin-right: 12px;
    margin-top: 8px;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: #0051D5;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 122, 255, 0.3);
}

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

.btn-secondary {
    background: var(--background);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--border-color);
}

/* Results Section */
.results-section {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.result-item {
    padding: 20px;
    background: var(--background);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: var(--transition);
}

.result-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.result-item.highlight {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.result-item.success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

.result-item.warning {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.result-label {
    font-size: 13px;
    font-weight: 500;
    opacity: 0.9;
}

.result-value {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* Cost Breakdown Chart */
.chart-section {
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

.cost-breakdown {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.breakdown-item {
    display: grid;
    grid-template-columns: 120px 1fr 60px;
    align-items: center;
    gap: 16px;
}

.breakdown-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.breakdown-bar {
    height: 24px;
    background: var(--background);
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

.breakdown-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.breakdown-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

.breakdown-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: right;
}

/* Suggestions */
.suggestions {
    margin-top: 32px;
    padding: 20px;
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    border-radius: 10px;
    border-left: 4px solid var(--warning-color);
}

.suggestions h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.suggestions ul {
    list-style: none;
    padding-left: 0;
}

.suggestions li {
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-primary);
    position: relative;
    padding-left: 24px;
}

.suggestions li::before {
    content: '💡';
    position: absolute;
    left: 0;
}

/* Footer */
footer {
    text-align: center;
    padding: 32px 0;
    color: var(--text-secondary);
    font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 24px 16px;
    }

    header h1 {
        font-size: 36px;
    }

    .card {
        padding: 24px;
    }

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

    .breakdown-item {
        grid-template-columns: 100px 1fr 50px;
        gap: 12px;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        margin-right: 0;
        margin-bottom: 12px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 28px;
    }

    .subtitle {
        font-size: 16px;
    }

    .card h2 {
        font-size: 24px;
    }

    .breakdown-item {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .breakdown-label {
        font-size: 13px;
    }
}

/* Loading Animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection Color */
::selection {
    background: var(--primary-color);
    color: white;
}

::-moz-selection {
    background: var(--primary-color);
    color: white;
}

/* Header Actions */
.header-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 16px;
}

/* Textarea */
textarea {
    width: 100%;
    padding: 14px 16px;
    font-size: 16px;
    border: 1.5px solid var(--border-color);
    border-radius: 10px;
    background: var(--card-background);
    color: var(--text-primary);
    transition: var(--transition);
    font-family: inherit;
    resize: vertical;
    min-height: 80px;
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

/* Section Header */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.section-header h2 {
    margin-bottom: 0;
}

/* Button Variants */
.btn-small {
    padding: 8px 16px;
    font-size: 14px;
}

.btn-success {
    background: var(--success-color);
    color: white;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    margin-right: 12px;
    margin-top: 8px;
}

.btn-success:hover {
    background: #28a745;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(52, 199, 89, 0.3);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-danger:hover {
    background: #dc3545;
    transform: translateY(-2px);
}

/* Product Item */
.product-item {
    background: var(--background);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.product-item:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.1);
}

.product-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.product-title {
    font-size: 20px;
    font-weight: 600;
    margin: 0;
}

.product-number {
    color: var(--primary-color);
}

.product-content {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 24px;
    margin-bottom: 20px;
}

/* Image Upload */
.product-image-section label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
}

.image-upload-area {
    width: 200px;
    height: 200px;
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    overflow: hidden;
    position: relative;
}

.image-upload-area:hover {
    border-color: var(--primary-color);
    background: rgba(0, 122, 255, 0.05);
}

.product-image-preview {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.upload-placeholder {
    text-align: center;
    color: var(--text-secondary);
}

.upload-placeholder span {
    font-size: 48px;
    display: block;
    margin-bottom: 8px;
}

.upload-placeholder p {
    font-size: 14px;
    margin: 0;
}

/* Input Row */
.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

/* Product Result */
.product-result {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
}

/* Summary Section */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.summary-item {
    padding: 20px;
    background: var(--background);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.summary-item.highlight {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.summary-item.success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

.summary-label {
    font-size: 13px;
    font-weight: 500;
    opacity: 0.9;
}

.summary-value {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* Share Section */
.share-section {
    background: linear-gradient(135deg, #e0f7fa 0%, #b2ebf2 100%);
}

.share-description {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.share-link-container {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
}

.share-link-container input {
    flex: 1;
    padding: 12px 16px;
    border: 1.5px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    font-family: monospace;
}

.share-info {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease-in-out;
}

.modal-content {
    background: var(--card-background);
    border-radius: 16px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    margin: 0;
    font-size: 24px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 32px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--background);
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
}

/* History Item */
.history-item {
    padding: 16px;
    background: var(--background);
    border-radius: 10px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.history-item:hover {
    border-color: var(--primary-color);
    transform: translateX(4px);
}

.history-item-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.history-item-meta {
    font-size: 13px;
    color: var(--text-secondary);
    display: flex;
    gap: 16px;
}

.history-empty {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

/* Actions Section */
.actions-section {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* Responsive Design Updates */
@media (max-width: 768px) {
    .product-content {
        grid-template-columns: 1fr;
    }

    .image-upload-area {
        width: 100%;
        height: 200px;
    }

    .input-row {
        grid-template-columns: 1fr;
    }

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

    .share-link-container {
        flex-direction: column;
    }

    .actions-section {
        flex-direction: column;
    }

    .actions-section button {
        width: 100%;
        margin: 0 0 12px 0;
    }

    .header-actions {
        flex-direction: column;
        width: 100%;
    }

    .header-actions button {
        width: 100%;
    }
}