/* -------------------------------------------------------------
 * 1. 基础配置与设计系统
 * ------------------------------------------------------------- */
:root {
    /* 主配色系统（HSL 以便精确调节柔和度与亮色通道） */
    --hue-primary: 230; /* 默认深蓝紫 */
    --hue-break: 150;   /* 休息时偏淡绿 */
    --hue-chill: 300;   /* 放空休整时偏紫罗兰 */

    --color-bg-1: hsl(var(--hue-primary), 35%, 12%);
    --color-bg-2: hsl(var(--hue-primary), 45%, 8%);
    --color-accent: hsl(var(--hue-primary), 100%, 65%);
    --color-accent-glow: hsla(var(--hue-primary), 100%, 65%, 0.3);

    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.6);
    --text-muted: rgba(255, 255, 255, 0.35);

    /* 玻璃拟物材质参数 */
    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.12);
    --glass-blur: 24px;
    --glass-shadow: 0 16px 40px rgba(0, 0, 0, 0.4), 
                    inset 0 1px 0 rgba(255, 255, 255, 0.15);

    /* 字体族 */
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Share Tech Mono', monospace;

    /* 过渡时间 */
    --transition-smooth: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-bounce: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* 重置与布局基础 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg-2);
    color: var(--text-primary);
    min-height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

/* -------------------------------------------------------------
 * 2. 动态环境渐变雾背景
 * ------------------------------------------------------------- */
.ambient-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    background: radial-gradient(circle at 10% 20%, hsla(var(--hue-primary), 60%, 15%, 0.8) 0%, transparent 50%),
                radial-gradient(circle at 90% 80%, hsla(calc(var(--hue-primary) + 40), 50%, 12%, 0.8) 0%, transparent 50%),
                radial-gradient(circle at 50% 50%, hsla(calc(var(--hue-primary) - 30), 40%, 10%, 0.9) 0%, transparent 60%);
    background-size: 200% 200%;
    animation: flowBg 25s ease infinite alternate;
    transition: var(--transition-smooth);
}

@keyframes flowBg {
    0% {
        background-position: 0% 0%;
    }
    50% {
        background-position: 100% 100%;
    }
    100% {
        background-position: 0% 100%;
    }
}

/* -------------------------------------------------------------
 * 3. 应用程序主容器与页眉
 * ------------------------------------------------------------- */
.app-container {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 440px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    align-items: center;
}

.app-header {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 8px;
}

.app-header h1 {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #ffffff 30%, rgba(255, 255, 255, 0.6) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.settings-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    width: 42px;
    height: 42px;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(10px);
    transition: var(--transition-bounce);
}

.settings-btn:hover {
    transform: rotate(45deg) scale(1.08);
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

.settings-btn svg {
    width: 20px;
    height: 20px;
}

/* -------------------------------------------------------------
 * 4. 模式切换滑块
 * ------------------------------------------------------------- */
.mode-selector-container {
    position: relative;
    display: flex;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    padding: 4px;
    width: 100%;
    backdrop-filter: blur(10px);
}

.mode-tab {
    position: relative;
    z-index: 2;
    flex: 1;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    padding: 12px 0;
    cursor: pointer;
    border-radius: 100px;
    transition: var(--transition-smooth);
}

.mode-tab.active {
    color: var(--text-primary);
}

.mode-slider {
    position: absolute;
    top: 4px;
    bottom: 4px;
    left: 4px;
    width: calc(50% - 4px);
    background: var(--color-accent);
    border-radius: 100px;
    box-shadow: 0 4px 15px var(--color-accent-glow);
    transition: var(--transition-smooth);
    z-index: 1;
}

/* -------------------------------------------------------------
 * 5. 玻璃拟物卡片
 * ------------------------------------------------------------- */
.glass-card {
    width: 100%;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-radius: 36px;
    padding: 36px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
    box-shadow: var(--glass-shadow);
    transition: var(--transition-smooth);
}

/* 状态指示灯与文字 */
.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 0, 0, 0.15);
    padding: 6px 16px;
    border-radius: 100px;
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-accent);
    box-shadow: 0 0 10px var(--color-accent);
}

.status-dot.pulsing {
    animation: pulseDot 2s infinite;
}

@keyframes pulseDot {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 hsla(var(--hue-primary), 100%, 65%, 0.7);
    }
    70% {
        transform: scale(1.1);
        box-shadow: 0 0 0 6px hsla(var(--hue-primary), 100%, 65%, 0);
    }
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 hsla(var(--hue-primary), 100%, 65%, 0);
    }
}

.status-text {
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

/* 圆环时钟 */
.timer-display-wrapper {
    position: relative;
    width: 240px;
    height: 240px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.progress-ring {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: rotate(-90deg); /* 旋转 -90deg，使得进度从最顶端顺时针出发 */
}

.progress-ring-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.04);
    stroke-width: 6;
}

.progress-ring-bar {
    fill: none;
    stroke: var(--color-accent);
    stroke-width: 6;
    stroke-linecap: round;
    /* 2 * PI * R (R=88) => 552.92 */
    stroke-dasharray: 552.92;
    stroke-dashoffset: 552.92;
    transition: stroke-dashoffset 0.3s linear, stroke 0.5s ease;
    filter: drop-shadow(0 0 6px var(--color-accent));
}

.time-countdown {
    font-family: var(--font-mono);
    font-size: 3.2rem;
    font-weight: 400;
    letter-spacing: -1px;
    color: var(--text-primary);
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* 胡伯曼附加信息区 */
.huberman-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    margin-top: -12px;
}

.huberman-info.hidden {
    display: none;
}

.info-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.info-value {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--color-accent);
    text-shadow: 0 0 10px var(--color-accent-glow);
}

/* 控制按钮 */
.controls-container {
    display: flex;
    align-items: center;
    gap: 20px;
}

.ctrl-btn {
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(10px);
    transition: var(--transition-bounce);
}

.ctrl-btn:active {
    transform: scale(0.92);
}

.ctrl-btn.primary {
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: #ffffff;
    color: #000000;
    box-shadow: 0 10px 25px rgba(255, 255, 255, 0.25);
}

.ctrl-btn.primary:hover {
    transform: scale(1.06);
    box-shadow: 0 12px 30px rgba(255, 255, 255, 0.4);
}

.ctrl-btn.primary svg {
    width: 24px;
    height: 24px;
}

.ctrl-btn.primary svg.play-icon {
    margin-left: 2px; /* 播放三角居中微调 */
}

.ctrl-btn.secondary {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.ctrl-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--color-accent);
    transform: scale(1.05);
}

.ctrl-btn.secondary svg {
    width: 18px;
    height: 18px;
}

.hidden {
    display: none !important;
}

/* -------------------------------------------------------------
 * 6. 设置抽屉面板与覆盖层
 * ------------------------------------------------------------- */
.settings-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 10;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

.settings-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.settings-drawer {
    position: absolute;
    top: 0;
    right: -420px;
    width: 100%;
    max-width: 400px;
    height: 100%;
    background: rgba(18, 18, 28, 0.9);
    border-left: 1px solid var(--glass-border);
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.settings-overlay.active .settings-drawer {
    right: 0;
}

.drawer-header {
    padding: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.drawer-header h2 {
    font-size: 1.4rem;
    font-weight: 800;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.3rem;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.close-btn:hover {
    color: var(--text-primary);
    transform: scale(1.1);
}

.drawer-content {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.settings-group {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.settings-group h3 {
    font-size: 0.9rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--color-accent);
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.setting-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.setting-item label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.slider-wrapper {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* 自定义 Input Range 样式 */
input[type="range"] {
    flex: 1;
    -webkit-appearance: none;
    background: rgba(255, 255, 255, 0.08);
    height: 6px;
    border-radius: 100px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #ffffff;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.4);
    transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.25);
    background: var(--color-accent);
}

.range-val {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text-primary);
    min-width: 40px;
    text-align: right;
}

/* 下拉框样式 */
.custom-select {
    width: 100%;
    padding: 12px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    outline: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.custom-select:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.custom-select option {
    background-color: #12121c;
    color: var(--text-primary);
}

.drawer-footer {
    padding: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.save-settings-btn {
    width: 100%;
    padding: 14px;
    background: var(--color-accent);
    color: var(--text-primary);
    border: none;
    border-radius: 14px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 8px 20px var(--color-accent-glow);
    transition: var(--transition-bounce);
}

.save-settings-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px hsla(var(--hue-primary), 100%, 65%, 0.45);
}

/* -------------------------------------------------------------
 * 7. 胡伯曼放空覆盖层 (大字静修)
 * ------------------------------------------------------------- */
.chill-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, #0a0a0f 0%, #030305 100%);
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.chill-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.chill-content {
    text-align: center;
    max-width: 500px;
    padding: 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 36px;
    position: relative;
}

#chillTitle {
    font-size: 2.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, hsl(var(--hue-chill), 100%, 75%) 0%, #ffffff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

#chillSubtitle {
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--text-secondary);
    max-width: 320px;
}

.chill-timer {
    font-family: var(--font-mono);
    font-size: 5rem;
    font-weight: 400;
    color: hsl(var(--hue-chill), 100%, 75%);
    text-shadow: 0 0 25px hsla(var(--hue-chill), 100%, 75%, 0.4);
}

.chill-skip-btn {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text-secondary);
    padding: 12px 28px;
    border-radius: 100px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-bounce);
}

.chill-skip-btn:hover {
    background: #ffffff;
    color: #000000;
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(255, 255, 255, 0.2);
}

/* 动效：水波纹放空脉冲 */
.ripple-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 280px;
    height: 280px;
    border-radius: 50%;
    border: 1.5px solid hsla(var(--hue-chill), 100%, 75%, 0.15);
    pointer-events: none;
    z-index: -1;
    animation: ripple 4s cubic-bezier(0.1, 0.8, 0.3, 1) infinite;
}

@keyframes ripple {
    0% {
        width: 200px;
        height: 200px;
        opacity: 0.8;
    }
    100% {
        width: 550px;
        height: 550px;
        opacity: 0;
    }
}

/* 隐藏/显示时间眼球按钮 */
.eye-toggle-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    padding: 6px 14px;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: -16px;
    transition: var(--transition-bounce);
    z-index: 5;
}

.eye-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
    transform: scale(1.05);
}

.eye-toggle-btn svg {
    width: 14px;
    height: 14px;
}

.time-countdown-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 5;
}

.time-hidden-label {
    font-family: var(--font-sans);
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--text-primary);
    background: linear-gradient(135deg, #ffffff 40%, rgba(255, 255, 255, 0.5) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    animation: pulseLabel 2s ease-in-out infinite alternate;
}

@keyframes pulseLabel {
    0% {
        transform: scale(0.96);
        opacity: 0.8;
    }
    100% {
        transform: scale(1.04);
        opacity: 1;
    }
}