* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    background: #0d0d0f;
    color: #fff;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 主按钮 - 占据屏幕中心 */
.din-trigger {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
    background: radial-gradient(ellipse at center, #1a1a2e 0%, #0d0d0f 70%);
}

.big-btn {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(145deg, #ff4757, #ff3838);
    box-shadow: 
        0 20px 60px rgba(255, 71, 87, 0.4),
        0 0 0 20px rgba(255, 71, 87, 0.1),
        inset 0 -4px 20px rgba(0,0,0,0.2),
        inset 0 4px 20px rgba(255,255,255,0.2);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
    -webkit-user-select: none;
}

.big-btn:active {
    transform: scale(0.92);
    box-shadow: 
        0 10px 30px rgba(255, 71, 87, 0.3),
        0 0 0 10px rgba(255, 71, 87, 0.05),
        inset 0 -2px 10px rgba(0,0,0,0.2);
}

.big-btn.recording {
    animation: pulse-record 0.6s ease-out;
}

@keyframes pulse-record {
    0% { transform: scale(1); box-shadow: 0 20px 60px rgba(255, 71, 87, 0.4), 0 0 0 20px rgba(255, 71, 87, 0.1); }
    50% { transform: scale(1.05); box-shadow: 0 30px 80px rgba(255, 71, 87, 0.6), 0 0 0 40px rgba(255, 71, 87, 0); }
    100% { transform: scale(1); box-shadow: 0 20px 60px rgba(255, 71, 87, 0.4), 0 0 0 20px rgba(255, 71, 87, 0.1); }
}

.btn-icon {
    font-size: 4rem;
    margin-bottom: 5px;
}

.btn-text {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.hint {
    margin-top: 30px;
    color: #666;
    font-size: 0.85rem;
}

/* 底部统计 - 常驻显示 */
.stats-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-around;
    padding: 20px;
    background: linear-gradient(transparent, rgba(13,13,15,0.95) 40%);
    z-index: 20;
}

.stat-item {
    text-align: center;
}

.stat-num {
    font-size: 1.8rem;
    font-weight: 700;
    color: #fff;
    line-height: 1;
}

.stat-num.total {
    color: #ff4757;
}

.stat-label {
    font-size: 0.7rem;
    color: #666;
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 快速输入层 - 从底部滑出 */
.input-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(10px);
    z-index: 100;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.input-overlay.active {
    opacity: 1;
    visibility: visible;
}

.input-panel {
    background: #1a1a1f;
    border-radius: 24px 24px 0 0;
    padding: 24px;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.input-overlay.active .input-panel {
    transform: translateY(0);
}

.input-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.input-title {
    font-size: 1.1rem;
    font-weight: 600;
}

.timestamp {
    font-size: 0.8rem;
    color: #666;
    font-family: 'SF Mono', monospace;
}

.quick-input {
    width: 100%;
    background: #0d0d0f;
    border: 2px solid #333;
    border-radius: 16px;
    padding: 18px 20px;
    font-size: 1.1rem;
    color: #fff;
    outline: none;
    transition: border-color 0.2s;
    margin-bottom: 16px;
}

.quick-input:focus {
    border-color: #ff4757;
}

.quick-input::placeholder {
    color: #555;
}

/* 快速标签 */
.quick-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.tag {
    padding: 8px 16px;
    background: #25252a;
    border: 1px solid #333;
    border-radius: 20px;
    font-size: 0.9rem;
    color: #aaa;
    cursor: pointer;
    transition: all 0.2s;
}

.tag:hover, .tag:active {
    background: #ff4757;
    border-color: #ff4757;
    color: #fff;
}

/* 操作按钮 */
.input-actions {
    display: flex;
    gap: 12px;
}

.btn {
    flex: 1;
    padding: 16px;
    border-radius: 14px;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-save {
    background: #ff4757;
    color: #fff;
}

.btn-save:active {
    background: #ff3838;
    transform: scale(0.98);
}

.btn-skip {
    background: #25252a;
    color: #888;
}

.btn-skip:active {
    background: #333;
}

/* 最近记录 - 右侧面板 (桌面) / 底部 (手机) */
.recent-panel {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 280px;
    max-height: calc(100vh - 140px);
    background: rgba(26,26,31,0.8);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 20px;
    overflow-y: auto;
    z-index: 15;
}

.recent-title {
    font-size: 0.9rem;
    color: #888;
    margin-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.recent-count {
    color: #ff4757;
    font-weight: 600;
}

.recent-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.recent-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px;
    background: rgba(255,255,255,0.03);
    border-radius: 12px;
    transition: background 0.2s;
}

.recent-item:hover {
    background: rgba(255,255,255,0.06);
}

.recent-time {
    font-size: 0.75rem;
    color: #555;
    white-space: nowrap;
    font-family: 'SF Mono', monospace;
}

.recent-content {
    flex: 1;
    font-size: 0.9rem;
    color: #ddd;
    word-break: break-all;
}

.recent-content.empty {
    color: #555;
    font-style: italic;
}

.view-all {
    font-size: 0.8rem;
    color: #ff4757;
    cursor: pointer;
    transition: opacity 0.2s;
}

.view-all:hover {
    opacity: 0.8;
}

/* 历史记录面板 */
.history-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.9);
    backdrop-filter: blur(20px);
    z-index: 150;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.history-overlay.active {
    opacity: 1;
    visibility: visible;
}

.history-panel {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    max-width: 600px;
    margin: 0 auto;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.history-header h2 {
    font-size: 1.2rem;
    font-weight: 600;
}

.close-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.1);
    color: #fff;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.2s;
}

.close-btn:hover {
    background: rgba(255,255,255,0.15);
}

.history-list {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.history-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: rgba(255,255,255,0.05);
    border-radius: 16px;
    transition: all 0.2s;
}

.history-item:hover {
    background: rgba(255,255,255,0.08);
}

.history-date {
    font-size: 0.7rem;
    color: #666;
    min-width: 60px;
    text-align: center;
}

.history-date .day {
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    display: block;
}

.history-date .month {
    font-size: 0.6rem;
    text-transform: uppercase;
}

.history-time {
    font-size: 0.75rem;
    color: #888;
    min-width: 50px;
    font-family: 'SF Mono', monospace;
}

.history-content {
    flex: 1;
    font-size: 0.95rem;
    color: #ddd;
    word-break: break-all;
}

.history-content.empty {
    color: #555;
    font-style: italic;
}

.history-actions {
    display: flex;
    gap: 8px;
}

.history-actions button {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: rgba(255,255,255,0.1);
    color: #888;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.history-actions button:hover {
    background: rgba(255,255,255,0.15);
    color: #fff;
}

.history-actions .btn-delete:hover {
    background: #ff4757;
    color: #fff;
}

/* 历史记录分组 */
.history-group {
    margin-bottom: 24px;
}

.history-date-header {
    font-size: 0.8rem;
    color: #666;
    padding: 8px 0;
    margin-bottom: 8px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Toast */
.toast {
.toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    background: #ff4757;
    color: #fff;
    padding: 16px 32px;
    border-radius: 30px;
    font-weight: 600;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.toast.show {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

/* 成就徽章 */
.achievement-toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: linear-gradient(135deg, #ffd700, #ffaa00);
    color: #000;
    padding: 16px 24px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    z-index: 200;
    transition: transform 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.achievement-toast.show {
    transform: translateX(-50%) translateY(0);
}

.achievement-icon {
    font-size: 1.8rem;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .big-btn {
        width: 160px;
        height: 160px;
    }
    
    .btn-icon {
        font-size: 3rem;
    }
    
    .recent-panel {
        position: fixed;
        top: auto;
        bottom: 100px;
        left: 20px;
        right: 20px;
        width: auto;
        max-height: 200px;
        background: rgba(13,13,15,0.95);
    }
    
    .stats-bar {
        padding-bottom: 30px;
    }
}

/* 隐藏的成就面板 - 可展开 */
.achievements-btn {
    position: fixed;
    top: 20px;
    left: 20px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 30;
    transition: all 0.2s;
}

.achievements-btn:hover {
    background: rgba(255,255,255,0.15);
}

/* 滑动指示器 */
.swipe-indicator {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 25;
}

.swipe-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    transition: all 0.3s;
}

.swipe-dot.active {
    background: #ff4757;
    width: 24px;
    border-radius: 4px;
}