/* ═══════════════════════════════════════════════════════════════════════════
   MAIN PAGE STYLES - Chat Interface
   ═══════════════════════════════════════════════════════════════════════════ */

/* Day Plan Banner */
.day-plan-banner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-secondary) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-xl);
}

.day-plan-info {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.day-plan-label {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.day-plan-topic {
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 1.1rem;
}

.day-plan-progress {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    min-width: 250px;
}

.day-plan-progress .progress-bar {
    flex: 1;
}

.day-plan-progress .progress-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
    white-space: nowrap;
}

/* Chat Container */
.chat-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

/* Chat Panels */
.chat-input-panel,
.chat-response-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    min-height: 500px;
}

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

.panel-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.model-badge {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(59, 130, 246, 0.2);
    color: var(--accent-blue);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
}

/* Input Area */
.input-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--space-lg);
}

.chat-textarea {
    flex: 1;
    min-height: 300px;
    resize: none;
    font-size: 1rem;
    line-height: 1.6;
}

.input-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-md);
}

.input-hints {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.hint-badge {
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.hint-badge:hover {
    background: var(--accent-blue);
    color: white;
}

.input-buttons {
    display: flex;
    gap: var(--space-sm);
}

/* Response Area */
.response-area {
    flex: 1;
    padding: var(--space-lg);
    overflow-y: auto;
}

.welcome-message {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
}

.welcome-icon {
    margin-bottom: var(--space-lg);
    color: var(--accent-blue);
}

.welcome-message h2 {
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.welcome-message p {
    color: var(--text-secondary);
    max-width: 400px;
    margin: 0 auto var(--space-lg);
}

.welcome-features {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.feature-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--accent-cyan);
}

.feature-item span:last-child {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Response Content */
.response-content {
    color: var(--text-primary);
    line-height: 1.8;
}

.response-content h1,
.response-content h2,
.response-content h3,
.response-content h4 {
    margin-top: var(--space-lg);
    margin-bottom: var(--space-md);
    color: var(--accent-cyan);
}

.response-content p {
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.response-content ul,
.response-content ol {
    margin-bottom: var(--space-md);
    padding-left: var(--space-lg);
}

.response-content li {
    margin-bottom: var(--space-sm);
}

.response-content code {
    background: var(--bg-secondary);
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.9em;
    color: var(--accent-green);
}

.response-content pre {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    overflow-x: auto;
    margin-bottom: var(--space-md);
}

.response-content pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
}

.response-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--space-md);
}

.response-content th,
.response-content td {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-color);
    text-align: left;
}

.response-content th {
    background: var(--bg-secondary);
    font-weight: 600;
}

.response-content blockquote {
    border-left: 4px solid var(--accent-blue);
    padding-left: var(--space-md);
    margin: var(--space-md) 0;
    color: var(--text-secondary);
    font-style: italic;
}

/* Loading Indicator */
.loading-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-2xl);
    color: var(--text-secondary);
}

/* Response Actions */
.response-actions {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--border-color);
}

/* Quick Links */
.quick-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.quick-link-card {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.quick-link-card:hover {
    background: var(--bg-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.quick-link-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: white;
}

.quick-link-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.quick-link-title {
    font-weight: 600;
    color: var(--text-primary);
}

.quick-link-count {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ═══════════════════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════════════════ */

@media (max-width: 1200px) {
    .chat-container {
        grid-template-columns: 1fr;
    }

    .chat-input-panel,
    .chat-response-panel {
        min-height: 400px;
    }
}

@media (max-width: 768px) {
    .day-plan-banner {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }

    .day-plan-progress {
        width: 100%;
    }

    .quick-links {
        grid-template-columns: 1fr;
    }

    .welcome-features {
        flex-direction: column;
    }

    .input-actions {
        flex-direction: column;
        gap: var(--space-md);
    }

    .input-hints {
        justify-content: center;
    }

    .input-buttons {
        width: 100%;
        justify-content: flex-end;
    }

    .suggestions-panel {
        grid-template-columns: 1fr;
    }
}

/* ═══════════════════════════════════════════════════════════════════════════
   SUGGESTIONS PANEL - Foundation Research
   ═══════════════════════════════════════════════════════════════════════════ */

.suggestions-panel {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.suggestions-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.suggestions-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.suggestions-title svg {
    fill: var(--primary);
}

.suggestions-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-md);
}

.suggestions-loading {
    text-align: center;
    color: var(--text-muted);
    padding: var(--space-lg);
    grid-column: 1 / -1;
}

.suggestion-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    cursor: pointer;
    transition: all 0.2s ease;
}

.suggestion-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
}

.suggestion-topic {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.75rem;
    color: var(--primary);
    background: rgba(59, 130, 246, 0.1);
    padding: 0.25rem 0.625rem;
    border-radius: 12px;
    margin-bottom: var(--space-sm);
}

.suggestion-difficulty {
    display: flex;
    gap: 2px;
    margin-left: auto;
}

.suggestion-difficulty .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--border);
}

.suggestion-difficulty .dot.active {
    background: var(--accent);
}

.suggestion-question {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: var(--space-sm);
}

.suggestion-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-style: italic;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
}

/* ═══════════════════════════════════════════════════════════════════════════
   EXTENDED THINKING INDICATOR
   ═══════════════════════════════════════════════════════════════════════════ */

.thinking-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-lg);
}

.thinking-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-cyan);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.thinking-text {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    flex: 1;
}

.thinking-title {
    font-weight: 600;
    color: var(--text-primary);
}

.thinking-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.thinking-timer {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-cyan);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

/* ═══════════════════════════════════════════════════════════════════════════
   RESPONSE HEADER & SOURCES
   ═══════════════════════════════════════════════════════════════════════════ */

.response-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
}

.response-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.25rem 0.625rem;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
    color: white;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.response-badge svg {
    fill: currentColor;
}

.thinking-time {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.response-sources {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    margin-top: var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    flex-wrap: wrap;
}

.sources-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.source-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-blue);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.source-link:hover {
    background: var(--accent-blue);
    color: white;
}