/**
 * HeuriSight Chat Messages
 * Based on: mockups/apple-redesign/01-main-app-shell.html
 * 
 * Provides styling for:
 * - Chat container
 * - Messages (user and assistant)
 * - Message avatars
 * - Message content
 * - Citations
 * - Input area
 * - Typing indicators
 */

/* =============================================================================
   CHAT CONTAINER
   ============================================================================= */

.hs-chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.hs-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-6, 24px);
}

/* =============================================================================
   MESSAGE STRUCTURE
   ============================================================================= */

.hs-message {
    display: flex;
    gap: var(--space-4, 16px);
    margin-bottom: var(--space-6, 24px);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Message Avatar */
.hs-message__avatar {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full, 9999px);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xs, 11px);
    font-weight: 600;
    margin-top: 2px;
}

.hs-message__avatar svg {
    width: 14px;
    height: 14px;
}

.hs-message--user .hs-message__avatar {
    background: linear-gradient(135deg, var(--accent, #0071E3), var(--purple, #AF52DE));
    color: white;
}

/* User avatar with initials */
.hs-message__avatar--initials {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.hs-message--assistant .hs-message__avatar {
    background: var(--accent-subtle, rgba(0, 113, 227, 0.08));
    color: var(--accent, #0071E3);
}

/* Message Content Container */
.hs-message__content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

/* Message Header */
.hs-message__header {
    display: flex;
    align-items: center;
    gap: var(--space-2, 8px);
    margin-bottom: var(--space-2, 8px);
}

/* Header metadata is removed in favor of footer */
.hs-message__header {
    display: none;
}

.hs-message__author {
    font-size: var(--text-sm, 13px);
    font-weight: 600;
    color: var(--text-primary, #1D1D1F);
}

.hs-message__time {
    font-size: var(--text-xs, 11px);
    color: var(--text-tertiary, #86868B);
}

/* Message Footer (timestamp + copy) */
.hs-message__footer {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2, 8px);
    margin-top: var(--space-2, 8px);
    color: var(--text-tertiary, #86868B);
}

.hs-message__copy {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-tertiary, #86868B);
    cursor: pointer;
    padding: 2px 4px;
    border-radius: var(--radius-sm, 6px);
    transition: background var(--duration-fast, 150ms) var(--ease-default),
                color var(--duration-fast, 150ms) var(--ease-default);
}

.hs-message__copy:hover {
    background: var(--border-light, rgba(0, 0, 0, 0.06));
    color: var(--text-primary, #1D1D1F);
}

/* Message Body */
.hs-message__body {
    font-size: var(--text-base, 15px);
    line-height: 1.6;
    color: var(--text-primary, #1D1D1F);
}

.hs-message__body p {
    margin-bottom: var(--space-3, 12px);
}

.hs-message__body p:last-child {
    margin-bottom: 0;
}

/* Code blocks in messages */
.hs-message__body pre {
    background: var(--bg-secondary, #F5F5F7);
    border-radius: var(--radius-md, 10px);
    padding: var(--space-4, 16px);
    overflow-x: auto;
    margin: var(--space-3, 12px) 0;
}

.hs-message__body code {
    font-family: 'SF Mono', 'Menlo', 'Monaco', 'Courier New', monospace;
    font-size: var(--text-sm, 13px);
}

.hs-message__body :not(pre) > code {
    background: var(--bg-secondary, #F5F5F7);
    padding: 2px 6px;
    border-radius: var(--radius-sm, 6px);
}

/* =============================================================================
   CITATIONS
   ============================================================================= */

.hs-citation {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    background: var(--accent-subtle, rgba(0, 113, 227, 0.08));
    border-radius: var(--radius-sm, 6px);
    font-size: var(--text-xs, 11px);
    font-weight: 500;
    color: var(--accent, #0071E3);
    cursor: pointer;
    transition: all var(--duration-fast, 150ms) var(--ease-default);
    text-decoration: none;
}

.hs-citation:hover {
    background: rgba(0, 113, 227, 0.15);
}

.hs-citation svg {
    width: 12px;
    height: 12px;
}

/* Message Citations Container */
.message-citations {
    display: flex;
    flex-direction: column;
    margin-top: var(--space-4, 16px);
    padding-top: var(--space-3, 12px);
    border-top: 1px solid var(--border-light, rgba(0, 0, 0, 0.06));
    width: 100%;
}

.citations-header {
    display: flex;
    align-items: center;
    gap: var(--space-2, 8px);
    font-size: var(--text-sm, 13px);
    font-weight: 500;
    color: var(--text-secondary, #6E6E73);
    padding: var(--space-2, 8px) 0;
    user-select: none;
}

.citations-title {
    display: flex;
    align-items: center;
    gap: var(--space-2, 8px);
}

.citations-title .toggle-icon {
    font-size: 10px;
    transition: transform var(--duration-fast, 150ms) var(--ease-default);
}

.citations-count-warning {
    font-size: var(--text-xs, 11px);
    color: var(--text-tertiary, #86868B);
    font-style: italic;
}

.citations-content {
    display: flex;
    flex-direction: column;
    width: 100%;
}

.citations-content.collapsed {
    display: none;
}

.citations-content.expanded {
    display: flex;
}

.citations-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2, 8px);
    padding: var(--space-2, 8px) 0;
}

.citations-list a,
.citations-list .citation-item {
    display: flex;
    align-items: center;
    gap: var(--space-2, 8px);
    padding: var(--space-2, 8px) var(--space-3, 12px);
    background: var(--bg-secondary, #F5F5F7);
    border-radius: var(--radius-md, 10px);
    font-size: var(--text-sm, 13px);
    color: var(--accent, #0071E3);
    text-decoration: none;
    transition: all var(--duration-fast, 150ms) var(--ease-default);
}

.citations-list a:hover,
.citations-list .citation-item:hover {
    background: var(--accent-subtle, rgba(0, 113, 227, 0.08));
}

.citations-load-more-container {
    padding: var(--space-2, 8px) 0;
}

.citations-load-more-btn {
    background: transparent;
    border: 1px solid var(--border-default, rgba(0, 0, 0, 0.1));
    border-radius: var(--radius-sm, 6px);
    padding: var(--space-2, 8px) var(--space-4, 16px);
    font-size: var(--text-sm, 13px);
    color: var(--accent, #0071E3);
    cursor: pointer;
    transition: all var(--duration-fast, 150ms) var(--ease-default);
}

.citations-load-more-btn:hover {
    background: var(--accent-subtle, rgba(0, 113, 227, 0.08));
    border-color: var(--accent, #0071E3);
}

/* Dark theme for citations */
[data-theme="dark"] .message-citations {
    border-top-color: var(--border-default, rgba(255, 255, 255, 0.12));
}

[data-theme="dark"] .citations-list a,
[data-theme="dark"] .citations-list .citation-item {
    background: var(--bg-tertiary, #2C2C2E);
}

[data-theme="dark"] .citations-list a:hover,
[data-theme="dark"] .citations-list .citation-item:hover {
    background: rgba(0, 113, 227, 0.15);
}

[data-theme="dark"] .citations-load-more-btn {
    border-color: var(--border-default, rgba(255, 255, 255, 0.12));
}

[data-theme="dark"] .citations-load-more-btn:hover {
    border-color: var(--accent, #0071E3);
}

/* =============================================================================
   INPUT AREA
   ============================================================================= */

.hs-input-area {
    padding: var(--space-4, 16px) var(--space-6, 24px) var(--space-6, 24px);
    background: var(--bg-primary, #FFFFFF);
}

.hs-input-container {
    max-width: 800px;
    margin: 0 auto;
}

.hs-input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: var(--space-2, 8px);
    background: var(--bg-secondary, #F5F5F7);
    border: 1px solid var(--border-default, rgba(0, 0, 0, 0.1));
    border-radius: var(--radius-lg, 14px);
    padding: var(--space-2, 8px);
    transition: all var(--duration-fast, 150ms) var(--ease-default);
}

.hs-input-wrapper:focus-within {
    border-color: var(--accent, #0071E3);
    box-shadow: 0 0 0 3px var(--accent-subtle, rgba(0, 113, 227, 0.08));
}

.hs-input-field {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    font-family: var(--font-sans);
    font-size: var(--text-base, 15px);
    line-height: 1.5;
    color: var(--text-primary, #1D1D1F);
    padding: var(--space-2, 8px) var(--space-3, 12px);
    resize: none;
    max-height: 200px;
}

.hs-input-field::placeholder {
    color: var(--text-tertiary, #86868B);
}

/* Input Actions */
.hs-input-actions {
    display: flex;
    align-items: center;
    gap: var(--space-1, 4px);
    padding-right: var(--space-1, 4px);
}

.hs-input-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm, 6px);
    color: var(--text-tertiary, #86868B);
    cursor: pointer;
    transition: all var(--duration-fast, 150ms) var(--ease-default);
}

.hs-input-btn:hover {
    background: rgba(0, 0, 0, 0.04);
    color: var(--text-secondary, #6E6E73);
}

.hs-input-btn svg {
    width: 18px;
    height: 18px;
}

.hs-input-btn--send {
    background: var(--accent, #0071E3);
    color: white;
    border-radius: var(--radius-sm, 6px);
}

.hs-input-btn--send:hover {
    background: var(--accent-hover, #0077ED);
    color: white;
}

.hs-input-btn--send:disabled {
    background: var(--gray-300, #D2D2D7);
    cursor: not-allowed;
}

/* Input Hints */
.hs-input-hint {
    display: flex;
    justify-content: center;
    gap: var(--space-4, 16px);
    margin-top: var(--space-3, 12px);
    font-size: var(--text-xs, 11px);
    color: var(--text-tertiary, #86868B);
}

.hs-input-hint span {
    display: flex;
    align-items: center;
    gap: var(--space-1, 4px);
}

.hs-kbd {
    font-family: var(--font-sans);
    font-size: 10px;
    font-weight: 500;
    background: var(--bg-secondary, #F5F5F7);
    border: 1px solid var(--border-default, rgba(0, 0, 0, 0.1));
    border-radius: 4px;
    padding: 1px 5px;
}

/* =============================================================================
   TYPING INDICATOR
   ============================================================================= */

.hs-typing-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-2, 8px);
    padding: var(--space-3, 12px) var(--space-4, 16px);
    background: var(--bg-secondary, #F5F5F7);
    border-radius: var(--radius-lg, 14px);
    width: fit-content;
}

.hs-typing-indicator__dots {
    display: flex;
    gap: 4px;
}

.hs-typing-indicator__dot {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full, 9999px);
    background: var(--text-tertiary, #86868B);
    animation: hs-typing-bounce 1.4s infinite ease-in-out both;
}

.hs-typing-indicator__dot:nth-child(1) { animation-delay: -0.32s; }
.hs-typing-indicator__dot:nth-child(2) { animation-delay: -0.16s; }
.hs-typing-indicator__dot:nth-child(3) { animation-delay: 0s; }

@keyframes hs-typing-bounce {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

.hs-typing-indicator__text {
    font-size: var(--text-sm, 13px);
    color: var(--text-secondary, #6E6E73);
}

/* =============================================================================
   STREAMING CURSOR (Assistant Processing)
   ============================================================================= */

/* Legacy typing indicator with blinking cursor */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-2, 8px);
}

.typing-lines {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.typing-text {
    font-size: var(--text-sm, 13px);
    color: var(--text-secondary, #6E6E73);
}

.typing-subtext {
    font-size: var(--text-xs, 11px);
    color: var(--text-tertiary, #86868B);
}

.typing-cursor {
    display: inline-block;
    font-weight: 400;
    color: var(--text-primary, #1D1D1F);
    animation: cursor-blink 1s step-end infinite;
    margin-left: 1px;
}

@keyframes cursor-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

[data-theme="dark"] .typing-cursor {
    color: var(--text-primary, #F5F5F7);
}

/* Streaming message cursor (within message content) */
.streaming-cursor,
.message-content .streaming-cursor {
    display: inline-block;
    width: 2px;
    height: 1em;
    background: var(--text-primary, #1D1D1F);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: cursor-blink 1s step-end infinite;
}

[data-theme="dark"] .streaming-cursor {
    background: var(--text-primary, #F5F5F7);
}

/* =============================================================================
   STREAMING STATUS
   ============================================================================= */

.hs-streaming-status {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2, 8px);
    font-size: var(--text-xs, 11px);
    color: var(--text-tertiary, #86868B);
    margin-top: var(--space-2, 8px);
}

.hs-streaming-status__dot {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full, 9999px);
    background: var(--accent, #0071E3);
    animation: hs-pulse 1.5s infinite ease-in-out;
}

@keyframes hs-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* =============================================================================
   LEGACY CLASS MAPPINGS
   For backwards compatibility with existing code
   ============================================================================= */

/* Map existing .message classes to new styles when inside sidebar-layout mode */
.hs-app--sidebar .message {
    display: flex;
    gap: var(--space-4, 16px);
    margin-bottom: var(--space-6, 24px);
    max-width: 900px;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-4, 16px);
    padding-right: var(--space-4, 16px);
    box-sizing: border-box;
}

.hs-app--sidebar .message .message-avatar,
.hs-app--sidebar .message .avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full, 9999px);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xs, 11px);
    font-weight: 600;
}

.hs-app--sidebar .message-user .message-avatar,
.hs-app--sidebar .message-user .avatar {
    background: linear-gradient(135deg, #5E5CE6, #BF5AF2);
    color: white;
}

.hs-app--sidebar .message-assistant .message-avatar,
.hs-app--sidebar .message-assistant .avatar {
    background: var(--bg-secondary, #F5F5F7);
    color: var(--accent, #0071E3);
}

.hs-app--sidebar .message-content {
    flex: 1;
    min-width: 0;
    font-size: var(--text-base, 15px);
    line-height: 1.6;
    color: var(--text-primary, #1D1D1F);
}

.hs-app--sidebar .message-meta {
    display: flex;
    align-items: center;
    gap: var(--space-2, 8px);
    margin-top: var(--space-2, 8px);
}

.hs-app--sidebar .message-time {
    font-size: var(--text-xs, 11px);
    color: var(--text-tertiary, #86868B);
}

/* Input area legacy mapping */
.hs-app--sidebar #chat-input-area,
.hs-app--sidebar .chat-input-area {
    padding: var(--space-4, 16px) var(--space-6, 24px) var(--space-6, 24px);
    background: var(--bg-primary, #FFFFFF);
}

.hs-app--sidebar .input-container,
.hs-app--sidebar #chat-input {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    align-items: flex-end;
    gap: var(--space-2, 8px);
    background: var(--bg-secondary, #F5F5F7);
    border: 1px solid var(--border-default, rgba(0, 0, 0, 0.1));
    border-radius: var(--radius-lg, 14px);
    padding: var(--space-2, 8px);
}

.hs-app--sidebar .input-container:focus-within,
.hs-app--sidebar #chat-input:focus-within {
    border-color: var(--accent, #0071E3);
    box-shadow: 0 0 0 3px var(--accent-subtle, rgba(0, 113, 227, 0.08));
}

.hs-app--sidebar #message-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    font-family: var(--font-sans);
    font-size: var(--text-base, 15px);
    line-height: 1.5;
    color: var(--text-primary, #1D1D1F);
    padding: var(--space-2, 8px) var(--space-3, 12px);
    resize: none;
    max-height: 200px;
}

.hs-app--sidebar #send-btn,
.hs-app--sidebar .send-button {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent, #0071E3);
    color: white;
    border: none;
    border-radius: var(--radius-sm, 6px);
    cursor: pointer;
    transition: all var(--duration-fast, 150ms) var(--ease-default);
}

.hs-app--sidebar #send-btn:hover,
.hs-app--sidebar .send-button:hover {
    background: var(--accent-hover, #0077ED);
}

/* =============================================================================
   DARK THEME
   ============================================================================= */

[data-theme="dark"] .hs-message--assistant .hs-message__avatar {
    background: rgba(0, 113, 227, 0.15);
}

[data-theme="dark"] .hs-message--user .hs-message__avatar {
    background: linear-gradient(135deg, #5E5CE6, #BF5AF2);
}

[data-theme="dark"] .hs-message__body pre {
    background: var(--bg-tertiary, #2C2C2E);
}

[data-theme="dark"] .hs-message__body :not(pre) > code {
    background: var(--bg-tertiary, #2C2C2E);
}

[data-theme="dark"] .hs-input-wrapper {
    background: var(--bg-tertiary, #2C2C2E);
    border-color: var(--border-default, rgba(255, 255, 255, 0.12));
}

[data-theme="dark"] .hs-input-btn:hover {
    background: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .hs-message__copy:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary, #FFFFFF);
}

[data-theme="dark"] .hs-kbd {
    background: var(--bg-tertiary, #2C2C2E);
    border-color: var(--border-default, rgba(255, 255, 255, 0.12));
}

[data-theme="dark"] .hs-typing-indicator {
    background: var(--bg-tertiary, #2C2C2E);
}

/* =============================================================================
   RESPONSIVE
   ============================================================================= */

@media (max-width: 768px) {
    .hs-messages {
        padding: var(--space-4, 16px);
    }
    
    .hs-message {
        gap: var(--space-3, 12px);
    }
    
    .hs-message__avatar {
        width: 28px;
        height: 28px;
    }
    
    .hs-input-area {
        padding: var(--space-3, 12px) var(--space-4, 16px) var(--space-4, 16px);
    }
    
    .hs-input-hint {
        display: none;
    }
}