/* ===== Chat-embedded WebRTC — Styles for RTC inside Chat page ===== */
/* Extracted from webrtc.css, scoped under .chat-rtc-container to avoid conflicts */

/* --- Theme Variables (Chat page uses body.dark-mode, not [data-theme]) --- */
:root {
    --rtc-sidebar-bg: #f8f9fa;
    --rtc-sidebar-border: var(--border-1);
    --rtc-video-bg: #000;
    --rtc-toolbar-bg: rgba(0, 0, 0, 0.7);
    --rtc-toolbar-text: #fff;
    --rtc-status-bar-bg: var(--container-bg-2);
    --rtc-window-card-bg: var(--card-bg);
    --rtc-window-card-border: var(--border-1);
    --rtc-window-card-selected: var(--accent);
    --rtc-toast-bg: var(--card-bg);
    --rtc-spinner-color: var(--accent);
    --rtc-badge-connected: #22c55e;
    --rtc-badge-connecting: #f59e0b;
    --rtc-badge-error: #ef4444;
    --rtc-debug-bg: var(--container-bg-2);
    --rtc-debug-text: var(--text-color);
}

body.dark-mode {
    --rtc-sidebar-bg: #1a2332;
    --rtc-toast-bg: #334155;
    --rtc-debug-bg: #1e293b;
}

/* --- Container --- */
.chat-rtc-container {
    display: none;
    flex-direction: column;
    height: 100%;
    background: var(--rtc-video-bg, #000);
    position: relative;
}

.chat-rtc-container .rtc-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* --- Status Bar --- */
.chat-rtc-container .rtc-status-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: var(--rtc-status-bar-bg, var(--container-bg-2));
    border-bottom: 1px solid var(--border-1);
    min-height: 44px;
    position: relative;
    z-index: 101;
}

.chat-rtc-container .rtc-status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    font-weight: 500;
}

.chat-rtc-container .rtc-status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--rtc-badge-error, #ef4444);
    transition: background-color 0.3s;
}

.chat-rtc-container .rtc-status-dot.connected {
    background: var(--rtc-badge-connected, #22c55e);
}

.chat-rtc-container .rtc-status-dot.connecting {
    background: var(--rtc-badge-connecting, #f59e0b);
    animation: rtc-pulse 1.5s ease-in-out infinite;
}

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

/* --- Video Grid --- */
.chat-rtc-container .rtc-video-grid {
    flex: 1;
    display: grid;
    gap: 4px;
    padding: 4px;
    overflow: auto;
}

.chat-rtc-container .rtc-video-grid[data-count="1"] { grid-template-columns: 1fr; }
.chat-rtc-container .rtc-video-grid[data-count="2"] { grid-template-columns: 1fr 1fr; }
.chat-rtc-container .rtc-video-grid[data-count="3"] { grid-template-columns: 1fr 1fr; }
.chat-rtc-container .rtc-video-grid[data-count="4"] { grid-template-columns: 1fr 1fr; }
.chat-rtc-container .rtc-video-grid:not([data-count]) { grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); }

/* --- Video Wrapper --- */
.chat-rtc-container .rtc-video-wrapper {
    position: relative;
    background: #111;
    border-radius: 8px;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    cursor: pointer;
    outline: none;
    border: 2px solid transparent;
    transition: border-color 0.2s;
}

.chat-rtc-container .rtc-video-wrapper.active {
    border-color: var(--rtc-spinner-color, #3b82f6);
}

.chat-rtc-container .rtc-video-wrapper video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

/* Video title label overlay (top) */
.chat-rtc-container .rtc-video-label {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: 6px 12px;
    background: linear-gradient(var(--rtc-toolbar-bg, rgba(0,0,0,0.7)), transparent);
    color: var(--rtc-toolbar-text, #fff);
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    pointer-events: none;
    z-index: 1;
}

/* Video toolbar overlay (hover) */
.chat-rtc-container .rtc-video-toolbar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 8px 12px;
    background: linear-gradient(transparent, var(--rtc-toolbar-bg, rgba(0,0,0,0.7)));
    color: var(--rtc-toolbar-text, #fff);
    display: flex;
    justify-content: space-between;
    align-items: center;
    opacity: 0;
    transition: opacity 0.25s;
}

.chat-rtc-container .rtc-video-wrapper:hover .rtc-video-toolbar {
    opacity: 1;
}

.chat-rtc-container .rtc-video-toolbar button {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
}

.chat-rtc-container .rtc-video-toolbar button:hover {
    background: rgba(255, 255, 255, 0.2);
}


/* CSS-based fullscreen fallback */
.chat-rtc-container .rtc-video-wrapper.rtc-fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    border-radius: 0;
    aspect-ratio: unset;
}

/* Native fullscreen */
.chat-rtc-container .rtc-video-wrapper:fullscreen {
    background: #000;
    border-radius: 0;
    aspect-ratio: unset;
}

.chat-rtc-container .rtc-video-wrapper:fullscreen video {
    width: 100vw;
    height: 100vh;
    object-fit: contain;
}

/* 全螢幕時工具列由 JS 控制（rtc-fs-active = 已進全螢幕） */
.chat-rtc-container .rtc-video-wrapper.rtc-fs-active .rtc-video-toolbar {
    display: none !important;
}

.chat-rtc-container .rtc-video-wrapper.rtc-fs-active .rtc-video-toolbar.rtc-toolbar-visible {
    display: flex !important;
    opacity: 1;
}

/* --- Connecting Overlay --- */
.chat-rtc-container .rtc-connecting-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    z-index: 100;
    color: white;
}

.chat-rtc-container .rtc-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--rtc-spinner-color, #3b82f6);
    border-radius: 50%;
    animation: rtc-spin 0.8s linear infinite;
    margin-bottom: 12px;
}

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

/* --- Empty State --- */
.chat-rtc-container .rtc-empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
    gap: 12px;
}

/* --- Debug Panel --- */
.chat-rtc-container .rtc-debug-panel {
    display: none;
    max-height: 200px;
    overflow-y: auto;
    background: var(--rtc-debug-bg, var(--container-bg-2));
    color: var(--rtc-debug-text, var(--text-color));
    font-family: monospace;
    font-size: 0.75rem;
    padding: 8px 12px;
    border-top: 1px solid var(--border-1);
}

.chat-rtc-container .rtc-debug-panel.visible {
    display: block;
}

.chat-rtc-container .rtc-debug-toggle {
    padding: 4px 10px;
    font-size: 0.75rem;
    background: transparent;
    border: 1px solid var(--border-1);
    border-radius: 4px;
    color: var(--text-color);
    cursor: pointer;
    opacity: 0.6;
}

.chat-rtc-container .rtc-debug-toggle:hover {
    opacity: 1;
}

/* --- Toast --- */
.chat-rtc-container .rtc-toast-container {
    position: absolute;
    top: 60px;
    right: 16px;
    z-index: 10001;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.chat-rtc-container .rtc-toast {
    padding: 12px 20px;
    background: var(--rtc-toast-bg, var(--card-bg));
    color: var(--text-color);
    border-radius: 10px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    border-left: 4px solid var(--accent);
    pointer-events: auto;
    animation: rtc-toast-in 0.3s ease-out;
    max-width: 360px;
    font-size: 0.875rem;
}

.chat-rtc-container .rtc-toast.success { border-left-color: var(--rtc-badge-connected, #22c55e); }
.chat-rtc-container .rtc-toast.error   { border-left-color: var(--rtc-badge-error, #ef4444); }
.chat-rtc-container .rtc-toast.warning { border-left-color: var(--rtc-badge-connecting, #f59e0b); }
.chat-rtc-container .rtc-toast.fade-out { animation: rtc-toast-out 0.3s ease-in forwards; }

@keyframes rtc-toast-in {
    from { opacity: 0; transform: translateX(100%); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes rtc-toast-out {
    from { opacity: 1; transform: translateX(0); }
    to   { opacity: 0; transform: translateX(100%); }
}

/* --- Window Picker Overlay (full page) --- */
.chat-rtc-container .rtc-window-picker {
    position: fixed;
    inset: 0;
    z-index: 9000;
    background: var(--rtc-sidebar-bg, #f8f9fa);
    display: flex;
    flex-direction: column;
    animation: rtc-picker-in 0.25s ease-out;
    max-width: 100vw;
    overflow: hidden;
}

.chat-rtc-container .rtc-window-picker[hidden] {
    display: none;
}

@keyframes rtc-picker-in {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

.chat-rtc-container .rtc-window-picker-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--rtc-sidebar-border, var(--border-1));
}

.chat-rtc-container .rtc-window-picker-header h2 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
}

.chat-rtc-container .rtc-window-picker-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    padding: 4px 10px;
    border-radius: 6px;
    line-height: 1;
}

.chat-rtc-container .rtc-window-picker-close:hover {
    background: rgba(128, 128, 128, 0.15);
}

.chat-rtc-container .rtc-window-picker-grid {
    flex: 1;
    overflow-y: auto;
    padding: 16px 20px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 10px;
    align-content: start;
}

.chat-rtc-container .rtc-window-picker-grid .rtc-window-card {
    margin-bottom: 0;
}

.chat-rtc-container .rtc-window-card {
    padding: 10px 12px;
    margin-bottom: 6px;
    background: var(--rtc-window-card-bg, var(--card-bg));
    border: 1px solid var(--rtc-window-card-border, var(--border-1));
    border-radius: 8px;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.chat-rtc-container .rtc-window-card:hover {
    border-color: var(--accent);
}

.chat-rtc-container .rtc-window-card.selected {
    border-color: var(--rtc-window-card-selected, var(--accent));
    background: rgba(59, 130, 246, 0.08);
}

.chat-rtc-container .rtc-window-card .window-title {
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-color);
}

.chat-rtc-container .rtc-window-picker-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-top: 1px solid var(--rtc-sidebar-border, var(--border-1));
    background: var(--rtc-sidebar-bg, #f8f9fa);
}

.chat-rtc-container .rtc-window-picker-count {
    font-size: 0.85rem;
    color: var(--text-color);
    opacity: 0.7;
}

.chat-rtc-container .rtc-window-picker-actions {
    display: flex;
    gap: 10px;
}

.chat-rtc-container .rtc-picker-cancel {
    padding: 8px 20px;
    background: transparent;
    border: 1px solid var(--border-1);
    border-radius: 8px;
    color: var(--text-color);
    font-weight: 500;
    cursor: pointer;
}

.chat-rtc-container .rtc-picker-cancel:hover {
    background: rgba(128, 128, 128, 0.12);
}

.chat-rtc-container .rtc-share-btn {
    padding: 8px 16px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.chat-rtc-container .rtc-share-btn:hover {
    background: var(--accent-dark);
}

.chat-rtc-container .rtc-share-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* --- Toggle Button in Chat Header --- */
.rtc-toggle-btn {
    background: none;
    border: 1px solid var(--chat-border-2, var(--border-1));
    border-radius: 6px;
    cursor: pointer;
    padding: 4px 8px;
    margin-left: 8px;
    display: inline-flex;
    align-items: center;
    color: var(--chat-text);
    transition: background 0.2s, border-color 0.2s;
}

.rtc-toggle-btn:hover {
    background: rgba(128, 128, 128, 0.15);
}

.rtc-toggle-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.rtc-toggle-btn.active svg {
    stroke: #fff;
}

/* --- Mobile touch — toolbar always visible --- */
@media (hover: none) and (pointer: coarse) {
    .chat-rtc-container .rtc-video-toolbar {
        opacity: 1;
    }

    .chat-rtc-container .rtc-video-toolbar button {
        padding: 10px 16px;
        font-size: 0.9rem;
    }
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .chat-rtc-container .rtc-video-grid {
        grid-template-columns: 1fr !important;
    }

    .chat-rtc-container .rtc-window-picker-grid {
        grid-template-columns: 1fr;
        padding: 12px;
    }

    .chat-rtc-container .rtc-window-picker-footer {
        padding: 10px 12px;
        flex-wrap: wrap;
        gap: 8px;
    }

    .chat-rtc-container .rtc-window-picker-count {
        width: 100%;
        text-align: center;
    }

    .chat-rtc-container .rtc-window-picker-actions {
        width: 100%;
        justify-content: stretch;
    }

    .chat-rtc-container .rtc-window-picker-actions button {
        flex: 1;
    }
}