/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0066ff;
    --primary-light: #5c9fff;
    --primary-dark: #0052cc;
    --secondary-color: #64748b;
    --secondary-hover: #475569;
    --success-color: #00c853;
    --danger-color: #ef4444;
    --warning-color: #ffd600;
    --error-color: #ff3d00;
    --text-color: #2c3e50;
    --text-light: #6c757d;
    --bg-color: #f8f9fa;
    --bg-dark: #1a1a1a;
    --card-bg: rgba(255, 255, 255, 0.95);
    --card-bg-dark: rgba(30, 30, 30, 0.95);
    --border-color: rgba(226, 232, 240, 0.8);
    --border-color-dark: rgba(51, 65, 85, 0.8);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 16px;
    --background-color: #f8f9fa;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: var(--transition);
}

body.dark {
    color: #ffffff;
    background-color: var(--bg-dark);
}

.app-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* 头部样式 */
.app-header {
    text-align: center;
    margin-bottom: 3rem;
}

.app-header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.app-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    font-weight: 400;
}

/* 主内容区域样式 */
.app-main {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .app-main {
        grid-template-columns: 1fr 1fr;
    }
    
    /* 让数据分析模块占据整行 */
    .analytics-container {
        grid-column: 1 / -1;
    }
}

/* 计时器样式 */
.timer-container {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.timer-container:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.15);
}

.timer-display {
    text-align: center;
    margin: 2rem 0;
    position: relative;
}

#timer {
    font-size: 6rem;
    font-weight: 300;
    font-family: 'SF Mono', SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
    color: var(--primary-color);
    text-shadow: 0 0 20px rgba(0, 102, 255, 0.2);
    transition: var(--transition);
}

.dark #timer {
    color: white;
}

.timer-mode {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-top: 1rem;
    font-weight: 500;
}

.timer-controls {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin: 0 0 34px 0;
}

.btn {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 0.8rem 1.5rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.2);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    border: none;
    color: white;
}

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

.btn-secondary:hover:not(:disabled) {
    background-color: var(--secondary-hover);
    transform: translateY(-2px);
}

.btn-outlined {
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outlined:hover {
    background-color: rgba(0, 122, 255, 0.1);
}

.btn-circle {
    background-color: var(--primary-color);
    color: white;
    border-radius: 50px;
    padding: 0.75rem 1.75rem;
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.btn-circle:hover {
    background-color: var(--primary-light);
    box-shadow: 0 6px 16px rgba(0, 122, 255, 0.3);
    transform: translateY(-2px);
}

.button-icon {
    font-size: 1.2rem;
}

.timer-settings {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    margin-bottom: 0.5rem;
}

.setting-group {
    display: flex;
    flex-direction: column;
}

.setting-group label {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.setting-group input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background-color: rgba(255, 255, 255, 0.8);
    transition: var(--transition);
}

.dark .setting-group input {
    background-color: rgba(44, 44, 46, 0.8);
    border-color: var(--border-color-dark);
    color: white;
}

.setting-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.25);
}

/* 声音控制样式 */
.sound-container {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.sound-container:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.15);
}

.sound-container h2 {
    font-size: 1.5rem;
    margin-bottom: 1.75rem;
    text-align: center;
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* 音效提示样式 */
.sound-intro {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    text-align: center;
    line-height: 1.5;
}

.sound-tips {
    display: none;
}

.dark .sound-tips {
    border-color: var(--border-color-dark);
}

.sound-tips h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    font-weight: 600;
    text-align: center;
}

.dark .sound-tips h3 {
    color: white;
}

.sound-tips ul {
    list-style: none;
    padding: 0;
}

.sound-tips li {
    margin-bottom: 0.75rem;
    color: var(--text-light);
    font-size: 0.95rem;
    display: flex;
    align-items: flex-start;
    line-height: 1.5;
}

.tip-icon {
    margin-right: 0.5rem;
    font-size: 1.1rem;
}

.sound-items {
    display: grid;
    padding-top: 20px;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.sound-item {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.sound-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.sound-item.active {
    background: rgba(0, 102, 255, 0.1);
    border-color: var(--primary-color);
}

.sound-icon {
    font-size: 2.25rem;
    margin-bottom: 0.75rem;
}

.sound-name {
    font-size: 0.95rem;
    font-weight: 500;
}

.volume-control {
    background: rgba(0, 0, 0, 0.05);
    padding: 1rem;
    border-radius: 12px;
    margin: 2rem 0;
    padding-bottom: 6px;
    padding-top: 8px;
}

.volume-slider-container {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
}

input[type="range"] {
    width: 100%;
    height: 6px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 3px;
    outline: none;
    transition: var(--transition);
}

#volumePercentage {
    min-width: 45px;
    color: #666;
    font-size: 14px;
}

/* 页脚样式 */
.app-footer {
    text-align: center;
    margin-top: 3.5rem;
    color: var(--text-light);
    font-size: 0.9rem;
    padding: 1.5rem 0;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .timer-container, .sound-container {
        padding: 1.5rem;
        margin: 0.5rem;
    }
    
    .timer-settings {
        grid-template-columns: 1fr;
    }
    
    #timer {
        font-size: 4rem;
    }
    
    .sound-items {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 动画 */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.timer-active {
    animation: pulse 2s infinite;
}

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

.notification-controls {
    animation: slideIn 0.5s ease-out;
}

/* 计时器选项样式 */
.timer-options {
    width: 100%;
    margin-top: 1.25rem;
    display: flex;
    justify-content: center;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-group input[type="checkbox"] {
    position: relative;
    width: 20px;
    height: 20px;
    -webkit-appearance: none;
    appearance: none;
    background-color: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    outline: none;
    cursor: pointer;
    transition: var(--transition);
}

.dark .checkbox-group input[type="checkbox"] {
    background-color: rgba(44, 44, 46, 0.8);
    border-color: var(--border-color-dark);
}

.checkbox-group input[type="checkbox"]:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-group input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 6px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-group label {
    font-size: 0.95rem;
    color: var(--text-light);
    font-weight: 500;
}

/* 弹出窗口按钮容器 */
.popout-button-container {
    margin-top: 1.75rem;
    text-align: center;
    width: 100%;
}

.help-text {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 0.75rem;
}

/* 悬浮时钟样式 */
.floating-timer {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 160px;
    background-color: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    z-index: 1000;
    transition: var(--transition);
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    pointer-events: none;
    border: 1px solid var(--border-color);
}

.floating-timer.active {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: all;
}

.floating-timer.minimized {
    width: 60px;
    height: 30px;
    transform: translateY(0) scale(0.9);
}

.dark .floating-timer {
    background-color: var(--card-bg-dark);
    box-shadow: var(--shadow-dark);
    border: 1px solid var(--border-color-dark);
}

.floating-timer-inner {
    padding: 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.floating-timer-display {
    text-align: center;
    width: 100%;
}

#floatingTimerText {
    font-size: 2rem;
    font-weight: 400;
    color: var(--text-color);
    font-family: 'SF Mono', SFMono-Regular, ui-monospace, monospace;
    line-height: 1;
    letter-spacing: -0.02em;
}

.dark #floatingTimerText {
    color: white;
}

.floating-timer-mode {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 4px;
    font-weight: 500;
}

.floating-timer-controls {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    width: 100%;
    margin-top: 10px;
}

.floating-timer-btn {
    border: none;
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-light);
    cursor: pointer;
    font-size: 0.8rem;
    padding: 2px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.dark .floating-timer-btn {
    background: rgba(255, 255, 255, 0.1);
}

.floating-timer-btn:hover {
    background-color: rgba(0, 0, 0, 0.1);
    color: var(--primary-color);
    transform: scale(1.1);
}

.dark .floating-timer-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
    color: var(--primary-color);
}

.floating-timer.minimized .floating-timer-display,
.floating-timer.minimized #floatingDragBtn,
.floating-timer.minimized .floating-timer-mode {
    display: none;
}

.floating-timer.minimized .floating-timer-inner {
    padding: 5px;
    flex-direction: row;
    justify-content: flex-end;
}

.floating-timer.minimized .floating-timer-controls {
    margin-top: 0;
}

.floating-timer.dragging {
    cursor: grabbing;
    user-select: none;
    opacity: 0.9;
    transform: scale(0.98);
}

/* 加载动画 */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.loading {
    background: linear-gradient(90deg, 
        var(--border-color) 25%, 
        var(--bg-color) 50%, 
        var(--border-color) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
}

/* 辅助功能优化 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

.btn:focus, .sound-item:focus {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}