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

:root {
    --primary-color: #3498db;
    --primary-hover: #2980b9;
    --secondary-color: #2ecc71;
    --secondary-hover: #27ae60;
    --danger-color: #e74c3c;
    --danger-hover: #c0392b;
    --bg-dark: #1a1a2e;
    --bg-card: #16213e;
    --bg-input: #0f3460;
    --text-primary: #ffffff;
    --text-secondary: #b8b8b8;
    --border-color: #2d3748;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #0f0f23 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

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

/* Header */
.header {
    text-align: center;
    padding: 30px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 30px;
}

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    margin-top: 8px;
    font-size: 0.9rem;
}

/* Step Sections */
.step-section {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.step-section h2 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* File Input */
.file-input-group {
    position: relative;
}

.file-input {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.file-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 30px;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    background: var(--bg-input);
    transition: all 0.3s ease;
    cursor: pointer;
}

.file-label:hover {
    border-color: var(--primary-color);
    background: rgba(52, 152, 219, 0.1);
}

.file-icon {
    font-size: 2rem;
}

.file-text {
    color: var(--text-secondary);
}

.file-name {
    margin-top: 10px;
    padding: 8px 12px;
    background: rgba(46, 204, 113, 0.1);
    border-radius: 6px;
    color: var(--secondary-color);
    font-size: 0.9rem;
    display: none;
}

.file-name.show {
    display: block;
}

/* Time Settings */
.time-settings {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.time-group {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.time-group label {
    min-width: 80px;
    font-weight: 500;
}

.time-inputs {
    display: flex;
    align-items: center;
    gap: 8px;
}

.time-input {
    width: 70px;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-input);
    color: var(--text-primary);
    text-align: center;
    font-size: 1rem;
}

.time-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Data Mode Tabs */
.data-mode-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.tab-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    background: var(--bg-input);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

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

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

/* Data Mode Content */
.data-mode-content {
    display: none;
}

.data-mode-content.active {
    display: block;
}

/* Paste Textarea */
.paste-textarea {
    width: 100%;
    min-height: 150px;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-input);
    color: var(--text-primary);
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
    resize: vertical;
}

.paste-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.hint {
    margin-top: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Manual Input */
.manual-input-header {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
}

.manual-table-container {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-input);
    border-radius: 8px;
    overflow: hidden;
}

.data-table th,
.data-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: var(--border-color);
    font-weight: 600;
}

.data-table td[contenteditable="true"],
.data-table th[contenteditable="true"] {
    cursor: text;
    min-width: 100px;
}

.data-table td[contenteditable="true"]:focus,
.data-table th[contenteditable="true"]:focus {
    outline: 2px solid var(--primary-color);
    background: rgba(52, 152, 219, 0.1);
}

.action-col {
    width: 50px;
    text-align: center;
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.btn-icon:hover {
    opacity: 1;
}

/* Data Preview */
.data-preview {
    overflow-x: auto;
    margin-top: 16px;
}

.preview-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
}

/* Slide Selection */
.slide-selection {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.slide-selection h3 {
    margin-bottom: 12px;
    font-size: 1rem;
}

.select-all-bar {
    padding: 10px;
    background: var(--bg-input);
    border-radius: 6px;
    margin-bottom: 12px;
}

.select-all-bar label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.slide-list {
    max-height: 300px;
    overflow-y: auto;
}

.slide-item {
    display: flex;
    align-items: center;
    padding: 12px;
    background: var(--bg-input);
    border-radius: 6px;
    margin-bottom: 8px;
    gap: 12px;
}

.slide-item:hover {
    background: var(--border-color);
}

.slide-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.slide-number {
    font-weight: 600;
    min-width: 60px;
}

.slide-info {
    flex: 1;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

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

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

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

.btn-secondary:hover {
    background: #4a5568;
}

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

.btn-danger:hover {
    background: var(--danger-hover);
}

.btn-large {
    padding: 16px 40px;
    font-size: 1.1rem;
    font-weight: 600;
}

/* Action Section */
.action-section {
    text-align: center;
}

.progress-container {
    margin-bottom: 20px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-input);
    border-radius: 4px;
    overflow: hidden;
    display: none;
}

.progress-bar.show {
    display: block;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    margin-top: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    min-height: 20px;
}

.status-text {
    margin-top: 16px;
    font-size: 0.9rem;
    min-height: 20px;
}

.status-text.success {
    color: var(--secondary-color);
}

.status-text.error {
    color: var(--danger-color);
}

.status-text.info {
    color: var(--primary-color);
}

/* Footer */
.footer {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
    margin-top: 30px;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 20px;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-card);
    border-radius: 12px;
    width: 100%;
    max-width: 900px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
}

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

.modal-header h3 {
    font-size: 1.2rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: all 0.2s;
}

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

.modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
}

.edit-table-container {
    overflow-x: auto;
}

/* Email Section Styles */
.email-toggle {
    margin-bottom: 16px;
}

.switch-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.switch-input {
    display: none;
}

.switch-slider {
    position: relative;
    width: 50px;
    height: 26px;
    background: var(--bg-input);
    border-radius: 13px;
    transition: background 0.3s;
}

.switch-slider::after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: transform 0.3s;
}

.switch-input:checked + .switch-slider {
    background: var(--secondary-color);
}

.switch-input:checked + .switch-slider::after {
    transform: translateX(24px);
}

.switch-text {
    font-weight: 500;
}

.email-config {
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.email-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.email-tab {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    background: var(--bg-input);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s;
}

.email-tab:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

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

.email-tab-content {
    display: none;
}

.email-tab-content.active {
    display: block;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: border-color 0.3s;
}

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

.form-textarea {
    resize: vertical;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.85rem;
}

.form-hint {
    display: block;
    margin-top: 4px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Sender Mode Selection */
.sender-mode {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.95rem;
}

.radio-label input[type="radio"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.sender-config {
    padding-top: 8px;
}

.builtin-notice {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 8px;
    border-left: 3px solid var(--primary-color);
}

.notice-icon {
    font-size: 1.2rem;
}

.notice-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.email-test {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.test-result {
    font-size: 0.9rem;
}

.test-result.success {
    color: var(--secondary-color);
}

.test-result.error {
    color: var(--danger-color);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header h1 {
        font-size: 1.5rem;
    }
    
    .step-section {
        padding: 16px;
    }
    
    .time-group {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .data-mode-tabs {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        flex: 1;
        min-width: 100px;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-input);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #4a5568;
}