/* ============================================
   AR挂画预览 - 样式文件
   ============================================ */

/* CSS变量定义 */
:root {
    --color-primary: #1a1a2e;
    --color-secondary: #16213e;
    --color-accent: #e94560;
    --color-auxiliary: #0f3460;
    --color-text: #ffffff;
    --color-text-muted: rgba(255, 255, 255, 0.7);
    --color-glass: rgba(255, 255, 255, 0.1);
    --color-glass-border: rgba(255, 255, 255, 0.2);
    --color-danger: #ff4757;
    --color-success: #2ed573;

    --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;

    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 50%;

    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;

    --z-loading: 1000;
    --z-permission: 900;
    --z-modal: 800;
    --z-toast: 700;
    --z-header: 100;
    --z-controls: 100;
    --z-hint: 50;
}

/* 重置样式 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: var(--font-family);
    font-size: 14px;
    color: var(--color-text);
    background: var(--color-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-overflow-scrolling: touch;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
}

/* 隐藏类 */
.hidden {
    display: none !important;
    opacity: 0 !important;
    pointer-events: none !important;
}

/* ============================================
   加载界面
   ============================================ */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 50%, var(--color-auxiliary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.loader-ring {
    width: 60px;
    height: 60px;
    border: 3px solid var(--color-glass);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loader-text {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text);
    letter-spacing: 1px;
}

/* ============================================
   权限请求界面
   ============================================ */
.permission-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-permission);
    padding: var(--spacing-lg);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.permission-content {
    text-align: center;
    max-width: 320px;
}

.permission-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: var(--color-glass);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-glass-border);
}

.permission-icon svg {
    width: 40px;
    height: 40px;
    color: var(--color-accent);
}

.permission-content h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.permission-content p {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

/* 按钮样式 */
.btn-primary,
.btn-secondary {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: var(--font-family);
    font-size: 16px;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-bottom: var(--spacing-sm);
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-text);
    box-shadow: 0 4px 20px rgba(233, 69, 96, 0.4);
}

.btn-primary:hover,
.btn-primary:active {
    background: #ff5a75;
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(233, 69, 96, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-glass-border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover,
.btn-secondary:active {
    background: var(--color-glass);
    border-color: var(--color-text-muted);
}

/* ============================================
   AR容器
   ============================================ */
.ar-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
    overflow: hidden;
}

#camera-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

#ar-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* AR提示层 */
.ar-hint {
    display: none; /* 隐藏中间提示，使用顶部提示替代 */
}

@keyframes pulse {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

.hint-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hint-icon svg {
    width: 32px;
    height: 32px;
    color: var(--color-accent);
    animation: bounce 1s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

#hint-text {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
}

/* 放置指示器 */
.placement-indicator {
    position: absolute;
    width: 80px;
    height: 80px;
    pointer-events: none;
    z-index: var(--z-hint);
}

.indicator-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 60px;
    height: 60px;
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: ripple 1.5s ease-out infinite;
}

@keyframes ripple {
    0% {
        width: 20px;
        height: 20px;
        opacity: 1;
    }
    100% {
        width: 80px;
        height: 80px;
        opacity: 0;
    }
}

.indicator-center {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 12px;
    height: 12px;
    background: var(--color-accent);
    border-radius: 50%;
    transform: translate(-50%, -50%);
}

/* ============================================
   顶部状态栏
   ============================================ */
.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.6) 0%, transparent 100%);
    z-index: var(--z-header);
    pointer-events: none;
}

.top-bar > * {
    pointer-events: auto;
}

.top-hint {
    flex: 1;
    text-align: center;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
    padding: 0 10px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.status-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.status-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 500;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-badge.detecting .status-dot {
    background: var(--color-accent);
}

.status-badge.error .status-dot {
    background: var(--color-danger);
}

.icon-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.icon-btn svg {
    width: 20px;
    height: 20px;
    color: var(--color-text);
}

.icon-btn:hover,
.icon-btn:active {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

/* ============================================
   底部控制面板
   ============================================ */
.control-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-controls);
    padding: var(--spacing-sm);
    padding-bottom: calc(var(--spacing-sm) + env(safe-area-inset-bottom, 0px));
    background: linear-gradient(0deg, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
    pointer-events: none;
}

.control-panel > * {
    pointer-events: auto;
}

/* 挂画选择器 */
.painting-selector {
    background: var(--color-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.selector-header {
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.painting-list {
    display: flex;
    gap: var(--spacing-sm);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding-bottom: var(--spacing-xs);
}

.painting-list::-webkit-scrollbar {
    display: none;
}

.painting-card {
    flex-shrink: 0;
    width: 80px;
    height: 100px;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    scroll-snap-align: start;
    position: relative;
    border: 2px solid transparent;
    transition: all var(--transition-normal);
}

.painting-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(0, 0, 0, 0.6) 100%);
    z-index: 1;
}

.painting-card:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

.painting-card.selected {
    border-color: var(--color-accent);
    box-shadow: 0 0 20px rgba(233, 69, 96, 0.5);
}

.painting-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.painting-name {
    position: absolute;
    bottom: var(--spacing-xs);
    left: var(--spacing-xs);
    right: var(--spacing-xs);
    font-size: 10px;
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    z-index: 2;
}

/* 控制区域 */
.controls {
    background: var(--color-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 控制组 */
.control-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.control-group:last-of-type {
    margin-bottom: var(--spacing-sm);
}

.control-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-muted);
    min-width: 60px;
}

.control-label svg {
    width: 16px;
    height: 16px;
}

/* 滑块 */
.slider {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(233, 69, 96, 0.5);
    transition: transform var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 10px rgba(233, 69, 96, 0.5);
}

.slider-value {
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text);
    min-width: 45px;
    text-align: right;
}

/* 快速操作按钮 */
.quick-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-glass-border);
}

.action-btn {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-glass);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.action-btn svg {
    width: 20px;
    height: 20px;
    color: var(--color-text);
}

.action-btn:hover,
.action-btn:active {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.action-btn.danger {
    background: rgba(255, 71, 87, 0.2);
    border-color: rgba(255, 71, 87, 0.5);
}

.action-btn.danger svg {
    color: var(--color-danger);
}

.action-btn.danger:hover,
.action-btn.danger:active {
    background: rgba(255, 71, 87, 0.4);
}

/* ============================================
   模态框
   ============================================ */
.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    z-index: var(--z-modal);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    width: 100%;
    max-width: 360px;
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    animation: scaleIn 0.3s ease;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.close-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.close-btn svg {
    width: 20px;
    height: 20px;
    color: var(--color-text-muted);
}

.close-btn:hover,
.close-btn:active {
    background: var(--color-glass);
}

.modal-body {
    padding: var(--spacing-md);
    max-height: 60vh;
    overflow-y: auto;
}

.help-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}

.help-icon {
    font-size: 24px;
    line-height: 1;
}

.help-text strong {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.help-text p {
    font-size: 12px;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* ============================================
   提示消息
   ============================================ */
.toast {
    position: fixed;
    top: 70px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    z-index: var(--z-toast);
    animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s forwards;
    white-space: nowrap;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

@keyframes toastOut {
    from {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    to {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
}

/* ============================================
   响应式适配
   ============================================ */
@media (max-width: 380px) {
    .painting-card {
        width: 70px;
        height: 90px;
    }

    .quick-actions {
        gap: var(--spacing-sm);
    }

    .action-btn {
        width: 44px;
        height: 44px;
    }
}

@media (min-width: 400px) {
    .painting-card {
        width: 90px;
        height: 110px;
    }
}

/* 横屏模式 */
@media (orientation: landscape) and (max-height: 500px) {
    .control-panel {
        padding: var(--spacing-sm);
    }

    .painting-selector {
        padding: var(--spacing-sm);
    }

    .painting-list {
        max-height: 80px;
    }
}

/* ============================================
   动画效果
   ============================================ */
.fade-in {
    animation: fadeIn 0.3s ease forwards;
}

.slide-up {
    animation: slideUp 0.3s ease forwards;
}

.scale-in {
    animation: scaleIn 0.3s ease forwards;
}

/* 选择动画 */
.painting-card.selected .painting-thumbnail {
    animation: selectedPulse 0.3s ease;
}

@keyframes selectedPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* 悬停效果 */
@media (hover: hover) {
    .painting-card:hover {
        transform: translateY(-5px) scale(1.05);
    }

    .btn-primary:hover {
        transform: translateY(-2px);
    }

    .action-btn:hover {
        transform: scale(1.1);
    }
}

/* 触摸反馈 */
@media (hover: none) {
    .btn-primary:active,
    .btn-secondary:active {
        transform: scale(0.95);
    }

    .painting-card:active {
        transform: scale(0.95);
    }

    .action-btn:active {
        transform: scale(0.9);
    }
}