/* app/static/css/style.css */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f5f7fa;
    color: #2c3e50;
}

.app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header h1 {
    font-size: 24px;
    font-weight: 600;
}

.progress-bar {
    margin-top: 10px;
    background: rgba(255,255,255,0.3);
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: white;
    transition: width 0.3s ease;
}

.progress-message {
    font-size: 14px;
    opacity: 0.9;
    margin-top: 5px;
}

/* Main Container */
.main-container {
    flex: 1;
    padding: 30px;
}

/* Start Screen */
.start-screen {
    max-width: 800px;
    margin: 0 auto;
}

.start-card {
    background: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.start-card h2 {
    font-size: 28px;
    margin-bottom: 30px;
    text-align: center;
}

.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 40px;
}

.question-input {
    flex: 1;
    padding: 15px 20px;
    font-size: 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    transition: border-color 0.3s ease;
}

.question-input:focus {
    outline: none;
    border-color: #667eea;
}

.start-button {
    padding: 15px 30px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.start-button:hover {
    background: #5a67d8;
    transform: translateY(-1px);
}

.start-button:disabled {
    background: #cbd5e0;
    cursor: not-allowed;
}

/* History Section */
.history-section {
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid #e0e0e0;
}

.session-item {
    background: #f8fafc;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.session-item:hover {
    border-color: #667eea;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

/* Tree Container */
.tree-container {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    overflow-x: auto;
    min-width: 800px;
}

/* Tree Structure */
.tree-node {
    position: relative;
    padding-left: 30px;
    margin: 10px 0;
}

.tree-node::before {
    content: '';
    position: absolute;
    left: 0;
    top: -10px;
    width: 1px;
    height: calc(100% + 20px);
    background: #e0e0e0;
}

.tree-node:last-child::before {
    height: 30px;
}

.tree-node::after {
    content: '';
    position: absolute;
    left: 0;
    top: 20px;
    width: 20px;
    height: 1px;
    background: #e0e0e0;
}

/* Root Node */
.root-node {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 30px;
}

.root-node h2 {
    font-size: 20px;
    margin-bottom: 8px;
}

/* Node Card */
.node-card {
    background: white;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    padding: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
    min-width: 300px;
}

.node-card:hover {
    border-color: #667eea;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

.node-card.processing {
    border-color: #3b82f6;
    animation: pulse 2s infinite;
}

.node-card.completed {
    border-color: #10b981;
}

.node-card.error {
    border-color: #ef4444;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); }
    70% { box-shadow: 0 0 0 8px rgba(59, 130, 246, 0); }
    100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
}

/* Node Content */
.node-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.node-title {
    font-weight: 600;
    font-size: 16px;
    flex: 1;
}

.node-status {
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.status-icon.completed {
    background: #10b981;
    color: white;
}

.status-icon.processing {
    background: #3b82f6;
    color: white;
}

.status-icon.pending {
    background: #9ca3af;
    color: white;
}

.expand-icon {
    transition: transform 0.3s ease;
    margin-right: 8px;
}

.expand-icon.expanded {
    transform: rotate(90deg);
}

.node-content {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #f0f0f0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: all 0.3s ease;
}

.node-content.expanded {
    max-height: 1000px;
    opacity: 1;
}

/* Phase Card */
.phase-card {
    background: #f8fafc;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    padding: 12px;
    margin: 8px 0;
}

.phase-card h4 {
    font-size: 14px;
    margin-bottom: 8px;
    color: #4b5563;
}

/* Action Buttons */
.action-buttons {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    gap: 12px;
}

.action-button {
    background: white;
    border: 1px solid #e5e7eb;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.action-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

.action-button.primary {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.action-button.danger {
    background: #ef4444;
    color: white;
    border-color: #ef4444;
}

/* Detail Panel */
.detail-panel {
    position: fixed;
    right: -400px;
    top: 0;
    width: 400px;
    height: 100vh;
    background: white;
    box-shadow: -4px 0 20px rgba(0,0,0,0.1);
    transition: right 0.3s ease;
    z-index: 1000;
    overflow-y: auto;
}

.detail-panel.open {
    right: 0;
}

.panel-header {
    padding: 20px;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #6b7280;
}

/* Loading */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}