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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --success-color: #16a34a;
    --success-hover: #15803d;
    --warning-color: #ea580c;
    --warning-hover: #c2410c;
    --danger-color: #dc2626;
    --danger-hover: #b91c1c;
    --secondary-color: #64748b;
    --secondary-hover: #475569;
    --bg-color: #f8fafc;
    --panel-bg: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
}

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

/* Toast Notification */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 16px 24px;
    background: var(--panel-bg);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--primary-color);
    z-index: 1000;
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s ease;
    max-width: 400px;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast.success {
    border-left-color: var(--success-color);
}

.toast.error {
    border-left-color: var(--danger-color);
}

.toast.warning {
    border-left-color: var(--warning-color);
}

/* Login Section */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    background: var(--panel-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-header h1 {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Form Elements */
.form-group {
    margin-bottom: 20px;
}

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

.form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.2s;
}

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

.error-message {
    color: var(--danger-color);
    font-size: 14px;
    margin-top: 12px;
    display: none;
}

.error-message.show {
    display: block;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-block;
}

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

.btn-primary {
    background: var(--primary-color);
    color: white;
    width: 100%;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--secondary-hover);
}

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

.btn-success:hover:not(:disabled) {
    background: var(--success-hover);
}

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

.btn-warning:hover:not(:disabled) {
    background: var(--warning-hover);
}

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

.btn-danger:hover:not(:disabled) {
    background: var(--danger-hover);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

/* App Container */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    background: var(--panel-bg);
    padding: 20px 32px;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-header h1 {
    font-size: 24px;
    color: var(--text-primary);
}

.header-actions {
    display: flex;
    gap: 16px;
    align-items: center;
}

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

/* Main Content */
.main-content {
    flex: 1;
    padding: 32px;
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 24px;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

/* Panels */
.panel {
    background: var(--panel-bg);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow);
}

.panel h2 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

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

/* Screen Panel */
.status-info {
    margin-bottom: 24px;
}

.status-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.status-row:last-child {
    border-bottom: none;
}

.status-row .label {
    font-weight: 500;
    color: var(--text-secondary);
}

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

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.status-playing {
    background: #dcfce7;
    color: var(--success-color);
}

.status-paused {
    background: #fed7aa;
    color: var(--warning-color);
}

.status-stopped {
    background: #f1f5f9;
    color: var(--text-secondary);
}

.control-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

.selected-content {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.selected-content h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.selected-item-info {
    padding: 12px;
    background: var(--bg-color);
    border-radius: 6px;
    font-size: 14px;
}

.selected-item-info em {
    color: var(--text-secondary);
}

/* Content Library */
.content-library {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.content-item {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    transition: all 0.2s;
    cursor: pointer;
}

.content-item:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.content-item.selected {
    border-color: var(--primary-color);
    background: #eff6ff;
}

.content-icon {
    font-size: 48px;
    text-align: center;
    margin-bottom: 12px;
}

.content-name {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    word-break: break-word;
    color: var(--text-primary);
}

.content-meta {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.content-actions {
    display: flex;
    gap: 8px;
}

.content-actions .btn {
    flex: 1;
    padding: 6px 12px;
    font-size: 12px;
}

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

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

/* Upload Section */
.upload-section {
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: 0 32px 32px 32px;
}

.upload-section h2 {
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--panel-bg);
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--primary-color);
    background: #eff6ff;
}

.drop-zone-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.drop-zone-text {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.drop-zone-hint {
    font-size: 14px;
    color: var(--text-secondary);
}

.upload-progress {
    margin-top: 16px;
}

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

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

.upload-status {
    font-size: 14px;
    color: var(--text-secondary);
    text-align: center;
}

/* Presentation Controls */
.presentation-section {
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: 0 32px 32px 32px;
}

.presentation-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 20px;
    background: var(--panel-bg);
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.nav-btn {
    padding: 12px 24px;
    font-size: 18px;
    font-weight: 600;
    min-width: 100px;
}

.nav-btn.large {
    padding: 16px 32px;
    font-size: 20px;
}

.slide-counter {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 120px;
    text-align: center;
}

.slide-counter span {
    color: var(--text-secondary);
    font-weight: 400;
}

/* Slide Thumbnails */
.slides-container {
    background: var(--panel-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
}

.slides-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.slides-header h3 {
    font-size: 16px;
    color: var(--text-primary);
}

.slides-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
    max-height: 400px;
    overflow-y: auto;
    padding: 4px;
}

.slide-thumb {
    position: relative;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s;
    aspect-ratio: 16/9;
    background: #f1f5f9;
}

.slide-thumb:hover {
    border-color: var(--primary-color);
    transform: scale(1.02);
}

.slide-thumb.active {
    border-color: var(--success-color);
    border-width: 3px;
    box-shadow: 0 0 0 2px rgba(22, 163, 74, 0.2);
}

.slide-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slide-number {
    position: absolute;
    bottom: 4px;
    right: 4px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

/* Presentation List */
.presentation-list {
    margin-bottom: 20px;
}

.presentation-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 8px;
    transition: all 0.2s;
}

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

.presentation-item.active {
    border-color: var(--success-color);
    background: #f0fdf4;
}

.presentation-info h4 {
    font-size: 14px;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.presentation-info p {
    font-size: 12px;
    color: var(--text-secondary);
}

.presentation-actions {
    display: flex;
    gap: 8px;
}

/* Current Slide Preview */
.current-slide-preview {
    background: var(--panel-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    text-align: center;
}

.current-slide-preview h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.preview-image {
    max-width: 100%;
    max-height: 300px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.no-presentation {
    padding: 40px;
    text-align: center;
    color: var(--text-secondary);
}

/* Tab Navigation */
.tab-nav {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
    background: var(--bg-color);
    padding: 4px;
    border-radius: 8px;
}

.tab-btn {
    flex: 1;
    padding: 10px 20px;
    border: none;
    background: transparent;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.2s;
}

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

.tab-btn.active {
    background: var(--panel-bg);
    color: var(--primary-color);
    box-shadow: var(--shadow);
}

.tab-content {
    display: none;
}

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

/* Responsive Design */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .screen-panel {
        order: 2;
    }

    .content-panel {
        order: 1;
    }
}

@media (max-width: 640px) {
    .app-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }

    .main-content {
        padding: 16px;
    }

    .upload-section {
        padding: 0 16px 16px 16px;
    }

    .control-buttons {
        grid-template-columns: 1fr;
    }

    .content-library {
        grid-template-columns: 1fr;
    }
}