:root {
    --primary-color: #0079bf;
    --primary-hover: #026aa7;
    --success-color: #61bd4f;
    --danger-color: #eb5a46;
    --warning-color: #f2d600;
    --text-color: #172b4d;
    --text-light: #5e6c84;
    --border-color: #dfe1e6;
    --bg-color: #f4f5f7;
    --card-bg: #ffffff;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-hover: 0 4px 8px rgba(0, 0, 0, 0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #026aa7 100%);
    color: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

header h1 {
    font-size: 2rem;
    margin-bottom: 8px;
}

header p {
    opacity: 0.9;
    font-size: 1rem;
}

.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    background: var(--card-bg);
    padding: 8px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    overflow-x: auto;
}

.tab-btn {
    flex: 1;
    padding: 12px 20px;
    background: transparent;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-light);
    transition: all 0.3s ease;
    white-space: nowrap;
}

.tab-btn:hover {
    background: var(--bg-color);
    color: var(--text-color);
}

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

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 30px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
}

.card h2 {
    margin-bottom: 10px;
    color: var(--text-color);
    font-size: 1.5rem;
}

.card h3 {
    margin: 20px 0 10px;
    color: var(--text-color);
    font-size: 1.2rem;
}

.description {
    color: var(--text-light);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.form-group {
    margin-bottom: 20px;
}

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

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    font-family: 'Courier New', monospace;
    resize: vertical;
}

.input-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.input-group input {
    flex: 1;
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 20px 0;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: normal;
}

.checkbox-group input[type="checkbox"] {
    margin-right: 10px;
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.info-box {
    background-color: #e3f2fd;
    border-left: 4px solid #2196f3;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 4px;
    font-size: 0.95rem;
}

.format-example {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 6px;
    border-left: 4px solid var(--primary-color);
}

.format-example code {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--text-color);
}

.button-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: var(--shadow-hover);
}

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

.btn-secondary:hover {
    background: #e4e6ea;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-icon {
    font-size: 1.1rem;
}

.progress-section,
.results-section,
.preview-section,
.card-list-section,
.log-section {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px solid var(--border-color);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.progress-fill {
    height: 100%;
    background: var(--success-color);
    transition: width 0.3s ease;
    width: 0%;
}

#auto-progress-text {
    color: var(--text-light);
    font-size: 0.9rem;
}

.results-section ul,
.card-list-section ul {
    list-style: none;
    padding: 0;
}

.results-section li,
.card-list-section li {
    padding: 12px;
    margin-bottom: 8px;
    background: var(--bg-color);
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: var(--bg-color);
    border-radius: 6px;
    margin-bottom: 10px;
}

.card-item a {
    color: var(--primary-color);
    text-decoration: none;
}

.card-item a:hover {
    text-decoration: underline;
}

.message {
    padding: 12px;
    border-radius: 6px;
    margin-top: 20px;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.message.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-overlay p {
    color: white;
    margin-top: 20px;
    font-size: 1.1rem;
}

hr {
    border: none;
    border-top: 2px solid var(--border-color);
    margin: 30px 0;
}

.color-preview {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.deal-preview {
    padding: 15px;
    background: var(--bg-color);
    border-radius: 6px;
}

.deal-preview h4 {
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.color-stripe {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 10px;
    padding: 10px;
    border-radius: 4px;
}

.color-box {
    width: 60px;
    height: 40px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.color-info {
    flex: 1;
    font-size: 0.85rem;
    font-family: 'Courier New', monospace;
}

/* Log Section */
.log-section {
    order: 9999; /* Move to end */
}

.log-content {
    background: #f8f9fa;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 15px;
    height: 100vh;
    max-height: 100vh;
    overflow-y: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    position: sticky;
    top: 0;
}

.log-entry {
    padding: 8px 12px;
    margin-bottom: 8px;
    border-radius: 4px;
    border-left: 4px solid var(--border-color);
    background: white;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.log-entry.info {
    border-left-color: var(--primary-color);
}

.log-entry.success {
    border-left-color: var(--success-color);
    background: #f0f9f4;
}

.log-entry.warning {
    border-left-color: var(--warning-color);
    background: #fffbf0;
}

.log-entry.error {
    border-left-color: var(--danger-color);
    background: #fef5f5;
}

.log-timestamp {
    color: var(--text-light);
    font-size: 0.75rem;
    white-space: nowrap;
    min-width: 70px;
}

.log-icon {
    font-size: 1rem;
    min-width: 20px;
}

.log-message {
    flex: 1;
    word-wrap: break-word;
}

.log-entry.info .log-icon { color: var(--primary-color); }
.log-entry.success .log-icon { color: var(--success-color); }
.log-entry.warning .log-icon { color: var(--warning-color); }
.log-entry.error .log-icon { color: var(--danger-color); }

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .tabs {
        flex-direction: column;
    }

    .tab-btn {
        width: 100%;
    }

    .card {
        padding: 20px;
    }

    .button-group {
        flex-direction: column;
    }

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

    .log-content {
        height: 70vh;
        max-height: 70vh;
    }
}