/* iOS风格移动端优先日记应用 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* iOS色彩系统 */
    --primary-blue: #007AFF;
    --primary-green: #34C759;
    --primary-red: #FF3B30;
    --primary-orange: #FF9500;
    --primary-purple: #AF52DE;
    
    --background-primary: #F2F2F7;
    --background-secondary: #FFFFFF;
    --background-tertiary: #F9F9F9;
    
    --text-primary: #000000;
    --text-secondary: #3C3C43;
    --text-tertiary: #8E8E93;
    
    --separator: #C6C6C8;
    --shadow: rgba(0, 0, 0, 0.1);
    
    /* 间距系统 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* 圆角系统 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background: var(--background-primary);
    color: var(--text-primary);
    line-height: 1.47;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 17px;
    overflow-x: hidden;
}

.diary-app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 顶部标题栏 */
.header {
    background: var(--background-secondary);
    border-bottom: 1px solid var(--separator);
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.app-title {
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

/* 错误提示 */
.error-message {
    background: var(--primary-red);
    color: white;
    padding: var(--spacing-md);
    margin: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 500;
    box-shadow: 0 2px 8px var(--shadow);
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 主要内容区域 */
.main-content {
    flex: 1;
    padding: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
}

/* 日期选择器 */
.date-selector {
    margin-bottom: var(--spacing-lg);
    background: var(--background-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border: 2px solid var(--separator);
    transition: all 0.2s ease;
}

.date-selector:focus-within {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.date-label-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.date-icon {
    font-size: 20px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-3px);
    }
    60% {
        transform: translateY(-2px);
    }
}

.date-label {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.date-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.date-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 2;
}

.date-display {
    flex: 1;
    height: 44px;
    padding: 0 var(--spacing-md);
    background: var(--background-secondary);
    border: 2px solid var(--primary-blue);
    border-radius: var(--radius-md);
    font-size: 17px;
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
}

.date-display:hover {
    background: var(--primary-blue);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.date-display:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.2);
}

/* 输入区域 */
.input-section {
    background: var(--background-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 2px 8px var(--shadow);
}

.input-container {
    margin-bottom: var(--spacing-lg);
}

/* 文字输入框 */
.text-input {
    width: 100%;
    min-height: 120px;
    padding: var(--spacing-md);
    border: 2px solid var(--separator);
    border-radius: var(--radius-md);
    font-size: 17px;
    font-family: inherit;
    resize: none;
    background: var(--background-tertiary);
    transition: all 0.2s ease;
    margin-bottom: var(--spacing-md);
}

.text-input:focus {
    outline: none;
    border-color: var(--primary-blue);
    background: var(--background-secondary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

/* 语音按钮 */
.voice-button {
    width: 100%;
    height: 60px;
    background: var(--primary-blue);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.voice-button:hover {
    background: #0056CC;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.voice-button:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(0, 122, 255, 0.2);
}

.voice-button.recording {
    background: var(--primary-red);
    animation: pulse 1.5s infinite;
}

.voice-button.processing {
    background: var(--text-tertiary);
    cursor: not-allowed;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 2px 8px rgba(255, 59, 48, 0.2);
    }
    50% {
        transform: scale(1.02);
        box-shadow: 0 4px 12px rgba(255, 59, 48, 0.4);
    }
}

.voice-icon {
    font-size: 20px;
}

.voice-text {
    font-size: 17px;
}

/* 保存按钮 */
.save-button {
    width: 100%;
    height: 60px;
    background: var(--primary-green);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(52, 199, 89, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.save-button:hover:not(:disabled) {
    background: #30B04F;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(52, 199, 89, 0.3);
}

.save-button:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(52, 199, 89, 0.2);
}

.save-button:disabled {
    background: var(--text-tertiary);
    cursor: not-allowed;
    box-shadow: none;
}

.save-icon {
    font-size: 20px;
}

.save-text {
    font-size: 17px;
}

/* 日记列表 */
.diary-list {
    margin-top: var(--spacing-lg);
}

.list-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.3px;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: var(--spacing-xxl) var(--spacing-lg);
    color: var(--text-tertiary);
}

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

.empty-text {
    font-size: 17px;
    font-weight: 500;
    line-height: 1.4;
}

/* 日记项目 */
.diary-item {
    background: var(--background-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: 0 2px 8px var(--shadow);
    transition: all 0.2s ease;
}

.diary-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.diary-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.diary-date {
    font-size: 15px;
    color: var(--text-tertiary);
    font-weight: 500;
}

.delete-button {
    color: var(--primary-red);
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    -webkit-tap-highlight-color: transparent;
}

.delete-button:hover {
    background: rgba(255, 59, 48, 0.1);
    transform: scale(1.1);
}

.diary-content {
    font-size: 17px;
    color: var(--text-primary);
    line-height: 1.47;
    margin: 0;
}

/* 响应式设计 - 平板和桌面 */
@media (min-width: 768px) {
    .main-content {
        padding: var(--spacing-xl);
    }
    
    .app-title {
        font-size: 32px;
    }
    
    .text-input {
        min-height: 140px;
        font-size: 18px;
    }
    
    .voice-button,
    .save-button {
        height: 64px;
        font-size: 18px;
    }
    
    .voice-icon,
    .save-icon {
        font-size: 22px;
    }
    
    .voice-text,
    .save-text {
        font-size: 18px;
    }
}

/* 大屏幕优化 */
@media (min-width: 1024px) {
    .main-content {
        max-width: 800px;
    }
    
    .input-section {
        padding: var(--spacing-xl);
    }
    
    .text-input {
        min-height: 160px;
    }
}

/* 安全区域适配 */
@supports (padding: max(0px)) {
    .header {
        padding-left: max(var(--spacing-md), env(safe-area-inset-left));
        padding-right: max(var(--spacing-md), env(safe-area-inset-right));
    }
    
    .main-content {
        padding-left: max(var(--spacing-md), env(safe-area-inset-left));
        padding-right: max(var(--spacing-md), env(safe-area-inset-right));
    }
}