/* ==================== 基础布局 ==================== */
body {
    min-height: 100vh;
    background: var(--gradient-bg);
}

.page {
    display: none;
    min-height: 100vh;
    opacity: 0;
    transform: scale(0.95);
    transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.page.active {
    display: block;
    opacity: 1;
    transform: scale(1);
}

.container {
    max-width: 640px;
    margin: 0 auto;
    padding: var(--space-lg);
}

/* ==================== 登录页面 ==================== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
}

.login-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    max-width: 440px;
    width: 100%;
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 0.6s ease-out;
}

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

.login-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.login-logo {
    max-width: 160px;
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--space-lg);
}

.login-title {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 800;
    color: var(--color-primary-dark);
    margin-bottom: var(--space-sm);
    letter-spacing: -0.5px;
}

.login-subtitle {
    font-size: 15px;
    color: var(--color-text-light);
    font-weight: 500;
}

.login-form {
    margin-bottom: var(--space-lg);
}

.input-group {
    margin-bottom: var(--space-lg);
}

.input-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.input-label svg {
    color: var(--color-primary);
}

.invite-input {
    width: 100%;
    padding: var(--space-md);
    font-size: 16px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    transition: all var(--transition-fast);
    outline: none;
}

.invite-input:focus {
    border-color: var(--color-primary);
    background: var(--color-surface);
    box-shadow: 0 0 0 4px rgba(255, 182, 193, 0.1);
}

.invite-input::placeholder {
    color: var(--color-text-light);
}

.error-message {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 160, 122, 0.1);
    border: 1px solid var(--color-coral);
    border-radius: var(--radius-sm);
    color: var(--color-coral);
    font-size: 14px;
    animation: shake 0.5s ease-out;
}

.error-message.hidden {
    display: none;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.login-btn {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 700;
    font-family: var(--font-display);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.login-btn:active {
    transform: translateY(0);
}

.login-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.login-footer {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.login-footer p {
    font-size: 13px;
    color: var(--color-text-light);
}

/* 移动端适配 */
@media (max-width: 640px) {
    .login-card {
        padding: var(--space-xl);
    }
    
    .login-logo {
        max-width: 120px;
    }
    
    .login-title {
        font-size: 24px;
    }
}

/* ==================== 角色选择页面 ==================== */
.page-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
    padding-top: var(--space-2xl);
}

.logo-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--space-2xl);
}

.page-logo {
    max-width: 224px;
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal);
}

.page-logo:hover {
    transform: scale(1.02);
}

@media (max-width: 640px) {
    .page-logo {
        max-width: 176px;
    }
}

.title {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 800;
    color: var(--color-primary-dark);
    margin-bottom: var(--space-sm);
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 16px;
    color: var(--color-text-light);
    font-weight: 500;
}

.character-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.character-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    border: 2px solid transparent;
}

.character-card:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.character-card:active {
    transform: scale(0.98);
}

.character-avatar {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 3px solid var(--color-primary-light);
    flex-shrink: 0;
}

.character-details {
    flex: 1;
}

.character-name {
    font-family: var(--font-display);
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.character-bio {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
}

.character-arrow {
    color: var(--color-primary);
    transition: transform var(--transition-fast);
}

.character-card:hover .character-arrow {
    transform: translateX(4px);
}

/* ==================== 聊天页面 ==================== */
.chat-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 640px;
    margin: 0 auto;
    background: var(--color-surface);
}

/* 聊天头部 */
.chat-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    z-index: var(--z-dropdown);
}

.back-btn, .clear-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.back-btn:hover, .clear-btn:hover {
    background: var(--color-bg);
    color: var(--color-primary);
}

.back-btn:active, .clear-btn:active {
    transform: scale(0.9);
}

.character-info {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.character-avatar-small {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 2px solid var(--color-primary-light);
}

.character-name-small {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text);
    display: block;
}

.online-status {
    font-size: 12px;
    color: var(--color-secondary);
    font-weight: 500;
}

/* 消息列表 */
.message-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-lg);
    background: var(--gradient-bg);
}

.welcome-message {
    text-align: center;
    padding: var(--space-xl) var(--space-lg);
    color: var(--color-text-light);
    font-size: 14px;
}

.message {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    animation: messageSlideIn 0.3s ease-out;
}

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

.message.user {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    object-fit: cover;
    flex-shrink: 0;
}

.message-content {
    max-width: 70%;
}

.message.ai .message-bubble {
    background: var(--color-surface);
    color: var(--color-text);
    border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) var(--space-xs);
    box-shadow: var(--shadow-sm);
}

.message.user .message-bubble {
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-lg) var(--radius-lg) var(--space-xs) var(--radius-lg);
}

.message-bubble {
    padding: var(--space-md);
    display: inline-block;
}

/* 语音消息 */
.voice-message {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    min-width: 160px;
}

.voice-play-btn {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.message.ai .voice-play-btn {
    background: var(--color-primary-light);
}

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

.voice-play-btn.playing {
    animation: pulse 1s ease-in-out infinite;
}

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

.voice-waveform {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 2px;
    height: 20px;
}

.waveform-bar {
    width: 3px;
    background: currentColor;
    border-radius: 2px;
    opacity: 0.6;
    transition: height var(--transition-fast);
}

.voice-duration {
    font-size: 12px;
    opacity: 0.9;
    white-space: nowrap;
}

.message-time {
    font-size: 11px;
    color: var(--color-text-light);
    margin-top: var(--space-xs);
    padding: 0 var(--space-xs);
}

/* 录音控制区 */
.input-area {
    padding: var(--space-md) var(--space-lg);
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    position: relative;
}

.record-btn {
    width: 100%;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    color: white;
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
}

.record-btn:active {
    transform: scale(0.98);
    box-shadow: var(--shadow-sm);
}

.record-btn.recording {
    background: var(--color-coral);
    animation: recordPulse 1.5s ease-in-out infinite;
}

@keyframes recordPulse {
    0%, 100% { box-shadow: var(--shadow-md); }
    50% { box-shadow: 0 0 0 8px rgba(255, 160, 122, 0.3), var(--shadow-md); }
}

.mic-icon {
    transition: transform var(--transition-fast);
}

.record-btn:hover .mic-icon {
    transform: scale(1.1);
}

/* 录音覆盖层 */
.recording-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 154, 162, 0.95);
    backdrop-filter: blur(10px);
    z-index: var(--z-overlay);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity var(--transition-normal);
}

.recording-overlay.hidden {
    display: none;
    opacity: 0;
}

.recording-content {
    text-align: center;
    color: white;
}

.waveform-container {
    margin-bottom: var(--space-lg);
}

#waveformCanvas {
    display: block;
    margin: 0 auto;
}

.recording-time {
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 700;
    margin-bottom: var(--space-md);
}

.max-time {
    font-size: 24px;
    opacity: 0.7;
}

.recording-hint {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-size: 16px;
    opacity: 0.9;
    animation: floatUp 2s ease-in-out infinite;
}

@keyframes floatUp {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* Toast提示 */
.toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: var(--z-toast);
    transition: opacity var(--transition-normal);
}

.toast.hidden {
    display: none;
    opacity: 0;
}

.toast-content {
    background: rgba(90, 90, 90, 0.95);
    color: white;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    box-shadow: var(--shadow-lg);
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

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

/* Modal模态框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    z-index: var(--z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    transition: opacity var(--transition-normal);
}

.modal.hidden {
    display: none;
    opacity: 0;
}

.modal-content {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    max-width: 320px;
    text-align: center;
    animation: modalSlideUp 0.3s ease-out;
}

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-icon {
    font-size: 48px;
    margin-bottom: var(--space-md);
}

.modal-content h3 {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.modal-content p {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

.primary-btn, .secondary-btn {
    width: 100%;
    height: 48px;
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.primary-btn {
    background: var(--gradient-primary);
    color: white;
    margin-bottom: var(--space-sm);
    box-shadow: var(--shadow-sm);
}

.primary-btn:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.primary-btn:active {
    transform: translateY(0);
}

.secondary-btn {
    background: transparent;
    color: var(--color-text-light);
}

.secondary-btn:hover {
    background: var(--color-bg);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 640px) {
    .container {
        padding: var(--space-md);
    }
    
    .title {
        font-size: 28px;
    }
    
    .character-card {
        padding: var(--space-md);
    }
    
    .character-avatar {
        width: 64px;
        height: 64px;
    }
    
    .character-name {
        font-size: 18px;
    }
}

/* ==================== 滚动条美化 ==================== */
.message-list::-webkit-scrollbar {
    width: 6px;
}

.message-list::-webkit-scrollbar-track {
    background: transparent;
}

.message-list::-webkit-scrollbar-thumb {
    background: var(--color-primary-light);
    border-radius: 3px;
}

.message-list::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}