/* ============================================================ */
/* 🎨 Homepage Theme Base API                                   */
/* 统一主题基座样式 - 从 homepage.html 提取                       */
/* ============================================================ */

/* === 字体加载 === */
@font-face {
    font-family: 'LXGWBrightGB';
    src: url('https://cdn.jsdelivr.net/gh/lxgw/LxgwBright@main/LXGWBrightGB/LXGWBrightGB-Regular.woff2') format('woff2');
    font-display: swap;
}

/* ============================================================ */
/* === CSS 变量 API ===                                         */
/* 所有工具页面应使用这些变量实现主题一致性                          */
/* ============================================================ */

:root {
    /* --- 动效缓动 --- */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-elastic: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-pop: cubic-bezier(0.34, 1.56, 0.64, 1);

    /* --- 尺寸系统 --- */
    --card-max-width: 640px;
    --card-padding: 2.5rem;
    --card-radius: 32px;
    --h1-size: 2.5rem;
    --desc-size: 1.1rem;
    --radius-lg: 32px;
    --radius-md: 20px;
    --radius-sm: 12px;

    /* --- 字体阴影 --- */
    --text-glow: 0 1px 3px rgba(0, 0, 0, 0.3);

    /* ============================================================ */
    /* 【暗色模式】                                                  */
    /* ============================================================ */
    --bg-base: #050505;

    /* 玻璃效果 */
    --glass-surface: rgba(10, 10, 12, 0.1);
    --glass-border: rgba(255, 255, 255, 0.03);
    --glass-glow: rgba(255, 255, 255, 0.07);
    --glass-blur: 10px;
    --glass-refraction-opacity: 0.14;
    --glass-refraction-blur: 9px;
    --glass-edge-size: 2.5px;
    --glass-edge-ink: rgba(255, 255, 255, 0.03);
    --glass-caustic-opacity: 0.09;

    /* 卡片光效 */
    --card-spotlight-size: 100px;
    --card-spotlight-color: rgba(255, 255, 255, 0.08);
    --card-press-glow: radial-gradient(circle, rgba(255, 255, 255, 0.6) 0%, transparent 70%);

    /* 按钮光效 */
    --btn-spotlight-size: 120px;
    --btn-source-size: 280px;
    --btn-source-rgb: 255, 255, 255;
    --btn-border-rgb: 255, 255, 255;
    --btn-hover-glow: rgba(255, 255, 255, 0.15);
    --btn-bg: rgba(255, 255, 255, 0.05);
    --btn-base-border: rgba(255, 255, 255, 0.06);
    --btn-hover-bg: #ffffff;
    --btn-hover-text: #000000;
    --btn-active-shadow: 0 0 12px rgba(0, 0, 0, 0.2), 0 0 26px rgba(0, 0, 0, 0.12);
    --btn-hover-ink: rgba(0, 0, 0, 0.08);
    --btn-hover-ink-strong: rgba(0, 0, 0, 0.16);
    --btn-shadow: 0 8px 30px rgba(255, 255, 255, 0.25);

    /* 文字颜色 */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.68);
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --accent: #ffffff;

    /* 输入框 */
    --input-bg: rgba(255, 255, 255, 0.04);
    --input-border: rgba(255, 255, 255, 0.06);

    /* 状态色 */
    --s-enc-bg: rgba(192, 132, 252, 0.1);
    --s-enc-txt: #e879f9;
    --s-dec-bg: rgba(52, 211, 153, 0.1);
    --s-dec-txt: #34d399;
    --s-err-bg: rgba(248, 113, 113, 0.1);
    --s-err-txt: #f87171;
    --s-warn-bg: rgba(251, 191, 36, 0.12);
    --s-warn-txt: #fbbf24;

    /* 阴影 */
    --shadow-card: 0 26px 70px -24px rgba(0, 0, 0, 0.2);
    --shadow-pop: 0 20px 40px -5px rgba(0, 0, 0, 0.6);
    --shadow-btn: 0 2px 5px rgba(0, 0, 0, 0.2);
    --modal-bg: rgba(10, 10, 12, 0.95);
}

/* ============================================================ */
/* 【亮色模式】                                                   */
/* ============================================================ */
@media (prefers-color-scheme: light) {
    :root {
        --bg-base: #f8fafc;
        --glass-surface: rgba(255, 255, 255, 0.26);
        --glass-border: rgba(0, 0, 0, 0.02);
        --glass-glow: rgba(255, 255, 255, 0.13);
        --glass-blur: 7px;
        --glass-refraction-opacity: 0.11;
        --glass-refraction-blur: 7px;
        --glass-edge-ink: rgba(255, 255, 255, 0.03);
        --glass-caustic-opacity: 0.07;
        --text-glow: 0 1px 2px rgba(0, 0, 0, 0.22);

        --card-spotlight-color: rgba(255, 255, 255, 0.8);

        --btn-source-rgb: 40, 40, 40;
        --btn-border-rgb: 110, 120, 130;
        --btn-hover-glow: rgba(0, 0, 0, 0.05);
        --btn-bg: rgba(255, 255, 255, 0.35);
        --btn-base-border: rgba(0, 0, 0, 0.05);
        --btn-hover-bg: #18181b;
        --btn-hover-text: #ffffff;
        --btn-active-shadow: 0 0 12px rgba(255, 255, 255, 0.6), 0 0 26px rgba(255, 255, 255, 0.35);
        --btn-hover-ink: rgba(255, 255, 255, 0.18);
        --btn-hover-ink-strong: rgba(255, 255, 255, 0.3);
        --btn-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);

        --text-primary: #0f172a;
        --text-secondary: #475569;
        --text-main: #1e293b;
        --text-muted: #64748b;
        --accent: #0f172a;

        --input-bg: rgba(241, 245, 249, 0.6);
        --input-border: rgba(0, 0, 0, 0.05);

        --s-enc-txt: #9333ea;
        --s-dec-txt: #059669;
        --s-err-txt: #dc2626;
        --s-warn-txt: #b45309;

        --shadow-card: 0 40px 80px -20px rgba(100, 116, 139, 0.15);
        --shadow-pop: 0 20px 40px -5px rgba(100, 116, 139, 0.2);
        --modal-bg: rgba(255, 255, 255, 0.95);
    }

    .bg-container {
        filter: brightness(1.1) saturate(1.1);
    }

    .bg-overlay {
        background: radial-gradient(circle at center, transparent 30%, rgba(255, 255, 255, 0.6) 100%);
    }
}

/* === HDR 支持 === */
@media (dynamic-range: high) {
    :root {
        --card-spotlight-color: color(display-p3 1 1 1 / 0.22);
        --card-press-glow: radial-gradient(circle, color(display-p3 1 1 1 / 0.6) 0%, transparent 60%);
        --btn-shadow: 0 12px 48px color(display-p3 1 1 1 / 0.55);
    }
}

@supports (color(display-p3 1 1 1)) {
    :root.hdr {
        --card-spotlight-color: color(display-p3 1 1 1 / 0.28);
        --card-press-glow: radial-gradient(circle, color(display-p3 1 1 1 / 0.75) 0%, transparent 65%);
        --btn-shadow: 0 16px 60px color(display-p3 1 1 1 / 0.7);
        --btn-hover-glow: color(display-p3 1 1 1 / 0.22);
        --glass-glow: color(display-p3 1 1 1 / 0.12);
    }

    .hdr .bg-container {
        filter: saturate(1.22) contrast(1.08) brightness(1.06);
    }

    .hdr .glass-card {
        box-shadow: 0 44px 120px -30px color(display-p3 0 0 0 / 0.38), inset 0 0 0 0.5px var(--glass-glow);
    }
}

/* ============================================================ */
/* === 基础重置 ===                                              */
/* ============================================================ */

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    outline: none;
    -webkit-tap-highlight-color: transparent;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'LXGWBrightGB', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
    background: var(--bg-base);
    color: var(--text-primary);
    text-shadow: var(--text-glow);
    transition: background 0.5s ease, opacity 0.35s var(--ease-out-expo);
    display: flex;
    flex-direction: column;
}

html.page-enter body,
html.page-exit body {
    opacity: 0;
}

html.page-ready body {
    opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
    body {
        transition: background 0.5s ease;
    }
}

/* 背景层 */
.bg-container {
    position: fixed;
    inset: 0;
    z-index: -1;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transform: scale(1.05);
    will-change: transform, opacity;
    transition: opacity 1s ease, transform 0.2s var(--ease-out-expo);
    background-image: linear-gradient(to bottom, var(--bg-base), #1a1a1a);
    pointer-events: none;
    -webkit-touch-callout: none;
}

.bg-container.loaded {
    opacity: 1;
    transform: scale(1.05);
}

.bg-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.8s ease;
    z-index: -2;
    pointer-events: none;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

.bg-image.loaded {
    opacity: 1;
}

.bg-overlay {
    position: absolute;
    inset: 0;
    background: transparent;
    mix-blend-mode: overlay;
    transition: background 0.25s ease;
}

.bg-overlay.loaded {
    background: radial-gradient(circle at center, transparent 0%, rgba(0, 0, 0, 0.6) 100%);
}

.main-container {
    perspective: 1200px;
    width: 100%;
    padding: 20px;
    margin: auto;
    display: flex;
    justify-content: center;
    opacity: 1;
    visibility: hidden;
    transform: translateY(15px);
    transition: transform 0.8s var(--ease-out-expo), visibility 0s;
    z-index: 10;
}

.main-container.visible {
    visibility: visible;
    transform: translateY(0);
    transition-delay: 0s;
}

/* ============================================================ */
/* === 玻璃卡片组件 ===                                          */
/* 使用: class="glass-card" 或 class="app-shell"                 */
/* ============================================================ */

.glass-card,
.app-shell {
    --gx: -1000px;
    --gy: -1000px;
    background:
        radial-gradient(170% 140% at 8% -20%, rgba(255, 255, 255, 0.04), transparent 58%),
        radial-gradient(170% 160% at 120% 120%, rgba(255, 255, 255, 0.03), transparent 60%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent),
        radial-gradient(var(--card-spotlight-size) circle at var(--gx) var(--gy), var(--card-spotlight-color), transparent 100%),
        var(--glass-surface);
    background-repeat: no-repeat;
    backdrop-filter: blur(var(--glass-blur)) saturate(1.25) brightness(1.06);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.25) brightness(1.06);
    border: 1px solid transparent;
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    width: 100%;
    max-width: var(--card-max-width);
    box-shadow: var(--shadow-card), inset 0 0 0 0.5px var(--glass-glow);
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin: auto;
    overflow: hidden;
    isolation: isolate;
}

.glass-card {
    padding: var(--card-padding) var(--card-padding) 1.5rem var(--card-padding);
    width: 90%;
    transform-style: preserve-3d;
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    outline: 1px solid transparent;
    transition: background 0.5s ease, border 0.5s ease;
    gap: 0;
}

/* 边缘折射光效 */
.glass-card::before,
.app-shell::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: var(--glass-edge-size);
    background:
        radial-gradient(120% 85% at 50% -20%, rgba(255, 255, 255, calc(var(--glass-refraction-opacity) * 0.6)) 0%, transparent 60%),
        radial-gradient(120% 85% at 50% 120%, rgba(255, 255, 255, calc(var(--glass-refraction-opacity) * 0.35)) 0%, transparent 60%),
        radial-gradient(160% 160% at 0% 0%, rgba(180, 220, 255, calc(var(--glass-refraction-opacity) * 0.75)) 0%, transparent 65%),
        radial-gradient(160% 160% at 100% 0%, rgba(255, 205, 225, calc(var(--glass-refraction-opacity) * 0.7)) 0%, transparent 65%),
        radial-gradient(160% 160% at 0% 100%, rgba(190, 230, 255, calc(var(--glass-refraction-opacity) * 0.65)) 0%, transparent 65%),
        radial-gradient(160% 160% at 100% 100%, rgba(255, 225, 205, calc(var(--glass-refraction-opacity) * 0.6)) 0%, transparent 65%),
        linear-gradient(180deg, rgba(255, 255, 255, calc(var(--glass-refraction-opacity) * 0.35)) 0%, transparent 45%, rgba(255, 255, 255, calc(var(--glass-refraction-opacity) * 0.2)) 100%),
        linear-gradient(115deg, rgba(255, 255, 255, 0) 42%, rgba(255, 255, 255, calc(var(--glass-refraction-opacity) * 0.45)) 50%, rgba(255, 255, 255, 0) 58%);
    background-position: 50% 0%, 50% 100%, 0% 0%, 100% 0%, 0% 100%, 100% 100%, 50% 50%, 50% 50%;
    background-repeat: no-repeat;
    opacity: 0.34;
    filter: blur(calc(var(--glass-refraction-blur) * 0.75));
    backdrop-filter: blur(calc(var(--glass-refraction-blur) * 0.8)) saturate(1.2);
    -webkit-backdrop-filter: blur(calc(var(--glass-refraction-blur) * 0.8)) saturate(1.2);
    mix-blend-mode: screen;
    pointer-events: none;
    z-index: 0;
    mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    mask-composite: exclude;
    -webkit-mask-composite: xor;
    animation: edge-flow 9s var(--ease-out-expo) infinite;
}

/* 焦散光效 */
.glass-card::after,
.app-shell::after {
    content: "";
    position: absolute;
    inset: -18%;
    border-radius: inherit;
    background:
        radial-gradient(65% 55% at 20% 30%, rgba(255, 255, 255, var(--glass-caustic-opacity)) 0%, transparent 70%),
        radial-gradient(70% 60% at 80% 70%, rgba(255, 255, 255, calc(var(--glass-caustic-opacity) * 0.8)) 0%, transparent 72%);
    opacity: 0.5;
    filter: blur(22px);
    mix-blend-mode: soft-light;
    pointer-events: none;
    z-index: 0;
    animation: caustic-flow 12s ease-in-out infinite;
}

@keyframes edge-flow {

    0%,
    100% {
        background-position: 50% 0%, 50% 100%, 0% 0%, 100% 0%, 0% 100%, 100% 100%, 50% 50%, 50% 50%;
    }

    50% {
        background-position: 52% -2%, 48% 102%, 4% -2%, 98% 6%, 2% 96%, 100% 104%, 52% 48%, 54% 46%;
    }
}

@keyframes caustic-flow {

    0%,
    100% {
        transform: translate3d(0, 0, 0) scale(1);
    }

    50% {
        transform: translate3d(-1.5%, 1%, 0) scale(1.02);
    }
}

.glass-card.size-animating {
    transition: background 0.5s ease, border 0.5s ease, height 1.2s var(--ease-out-expo);
    will-change: height;
}

.glass-card.active {
    backdrop-filter: blur(var(--glass-blur)) saturate(1.25) brightness(1.06);
    -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(1.25) brightness(1.06);
}

.card-press-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    border-radius: inherit;
    overflow: hidden;
}

.press-spot {
    position: absolute;
    width: 500px;
    height: 500px;
    background: var(--card-press-glow);
    transform: translate(-50%, -50%) scale(0.5);
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.4s ease, transform 0.4s ease;
    filter: blur(40px);
    will-change: transform, opacity;
    mix-blend-mode: plus-lighter;
}

.card-press-layer.active .press-spot {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.35);
    transition: opacity 0.1s ease, transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.glass-card>header,
.glass-card>section,
.glass-card>p {
    position: relative;
    z-index: 1;
}

.glass-card.pressing header h1,
.glass-card.pressing .description,
.glass-card.pressing .section-title,
.glass-card.pressing .btn span {
    text-shadow: var(--text-glow), 0 0 18px rgba(255, 255, 255, 0.28), 0 0 36px rgba(255, 255, 255, 0.18);
}

.glass-card.pressing header h1 {
    overflow: hidden;
}

.glass-card>header h1,
.glass-card>header .description,
.glass-card>section {
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.9s var(--ease-out-expo), transform 0.9s var(--ease-out-expo);
}

.glass-card.text-ready>header h1,
.glass-card.text-ready>header .description,
.glass-card.text-ready>section {
    opacity: 1;
    transform: translateY(0);
}

.glass-card.text-ready>header h1 {
    transition-delay: 0.04s;
}

.glass-card.text-ready>header .description {
    transition-delay: 0.12s;
}

.glass-card.text-ready>section:nth-of-type(1) {
    transition-delay: 0.2s;
}

.glass-card.text-ready>section:nth-of-type(2) {
    transition-delay: 0.28s;
}

.glass-card.text-ready>section:nth-of-type(3) {
    transition-delay: 0.36s;
}

header h1 {
    font-size: var(--h1-size);
    font-weight: 500;
    margin-bottom: 0.8rem;
    display: flex;
    align-items: baseline;
    flex-wrap: nowrap;
    gap: 12px;
    letter-spacing: -1.2px;
    line-height: 1.2;
    color: var(--text-primary);
    height: auto;
    min-height: 1.4em;
    max-height: 1.4em;
    transition: gap 1.2s var(--ease-out-expo), color 0.6s ease, max-height 1.2s var(--ease-out-expo);
    overflow: hidden;
    min-width: 0;
}

header h1.newline-mode {
    gap: 0;
    max-height: 6em;
    flex-wrap: wrap;
}

#title-trigger {
    cursor: default;
    position: relative;
    transition: opacity 0.2s;
    flex-shrink: 0;
    touch-action: manipulation;
}

.typewriter-box {
    display: inline-flex;
    align-items: baseline;
    color: var(--text-primary);
    position: relative;
    flex: 1 1 0;
    min-width: 0;
    max-width: 100%;
    overflow: hidden;
    white-space: nowrap;
    scrollbar-width: none;
    -ms-overflow-style: none;
    mask-image: none;
    -webkit-mask-image: none;
    transition: max-width 1.2s var(--ease-out-expo), margin-top 1.2s var(--ease-out-expo), transform 1.2s var(--ease-out-expo), mask-image 0.3s;
    min-height: 1.3em;
    line-height: 1.2;
    transform: translateY(0) scale(1);
    gap: 0;
}

.typewriter-box.mask-active {
    mask-image: linear-gradient(to right, transparent 0%, black 45px, black 100%);
    -webkit-mask-image: linear-gradient(to right, transparent 0%, black 45px, black 100%);
}

header h1.newline-mode .typewriter-box {
    display: block;
    flex-basis: 100%;
    width: 100%;
    max-width: 100%;
    margin-top: 0.5rem;
    white-space: normal;
    overflow: visible;
    mask-image: none !important;
    -webkit-mask-image: none !important;
    transform: translateY(2px) scale(0.985);
}

header h1:not(.newline-mode) .typewriter-box {
    white-space: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
}

header h1.transitioning {
    transition: gap 1.3s var(--ease-out-expo), max-height 1.3s var(--ease-out-expo);
}

header h1.transitioning .typewriter-box {
    transition: max-width 1.3s var(--ease-out-expo), margin-top 1.3s var(--ease-out-expo), transform 1.3s var(--ease-out-expo);
}

#typing-text {
    display: inline;
    word-break: break-word;
    overflow-wrap: anywhere;
}

.cursor {
    width: 8px;
    height: 0.9em;
    background: var(--accent);
    margin-left: 0;
    display: inline-block;
    animation: cursor-blink 1s step-end infinite;
    position: relative;
    top: 2px;
    vertical-align: baseline;
    transition: background 0.5s ease;
}

@keyframes cursor-blink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0;
    }
}

.description {
    font-size: var(--desc-size);
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    font-weight: 400;
    letter-spacing: 0.5px;
    cursor: default;
    white-space: pre-wrap;
    transition: color 0.5s ease;
}

.section-title {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 16px;
    font-weight: 600;
    opacity: 0.8;
    transition: color 0.5s ease;
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: currentColor;
    opacity: 0.15;
}

.section-title.collapsible {
    cursor: pointer !important;
    user-select: none;
}

.section-title.collapsible::before {
    content: '';
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 6px solid currentColor;
    opacity: 0.5;
    transition: transform 0.4s var(--ease-out-expo), opacity 0.3s ease;
    transform: rotate(-90deg);
    margin-right: 8px;
}

.section-title.collapsible:hover::before {
    opacity: 0.8;
}

.section-title.collapsible.open::before {
    transform: rotate(0deg);
}

.button-group,
.bento-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin: 0 -6px 0.8rem -6px;
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin: 0 0 0.5rem 0;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin: 0 0 0 0;
}

.glass-card > section + section {
    margin-top: 1.2rem;
}

.bento-grid .btn {
    justify-self: stretch;
    width: 100%;
    margin: 0;
    max-width: none;
}

.tools-grid .tool-card {
    justify-self: stretch;
    width: 100%;
}

.tool-card {
    --bx: -1000px;
    --by: -1000px;
    --sx: -1000px;
    --sy: -1000px;
    --si: 0;
    position: relative;
    padding: 18px 16px;
    border-radius: 20px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 14px;
    background: linear-gradient(var(--btn-bg), var(--btn-bg)), radial-gradient(120px circle at var(--bx) var(--by), var(--btn-hover-glow), transparent 100%);
    border: 1px solid transparent;
    transition: transform 0.4s var(--ease-out-expo), box-shadow 0.3s ease;
    background-clip: padding-box, padding-box;
    overflow: hidden;
    cursor: pointer;
}

.tool-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: radial-gradient(120px circle at var(--bx) var(--by), rgba(var(--btn-border-rgb), 0.85), transparent 100%), radial-gradient(var(--btn-source-size) circle at var(--sx) var(--sy), rgba(var(--btn-source-rgb), calc(0.9 * var(--si))), transparent 80%), linear-gradient(var(--btn-base-border), var(--btn-base-border));
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-image: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-image: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    z-index: 2;
}

.tool-card::after {
    content: "";
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: var(--btn-hover-bg);
    left: var(--press-x, var(--bx));
    top: var(--press-y, var(--by));
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
    pointer-events: none;
    z-index: 1;
    transition: transform 0.5s var(--ease-out-expo), opacity 0.3s ease;
}

.tool-card:hover {
    transform: scale(1.01) translateZ(0);
    z-index: 10;
}

.tool-card:active::after,
.tool-card.is-pressed::after {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.tool-card:active,
.tool-card.is-pressed {
    transform: scale(0.99) translateZ(0);
    color: var(--btn-hover-text);
    text-shadow: var(--btn-active-shadow);
}

.tool-card:active .tool-name,
.tool-card:active .tool-desc,
.tool-card.is-pressed .tool-name,
.tool-card.is-pressed .tool-desc {
    color: inherit;
    text-shadow: var(--btn-active-shadow);
}

.tool-card:active .tool-icon,
.tool-card.is-pressed .tool-icon {
    color: var(--btn-hover-text);
    background: var(--btn-hover-ink);
    border-color: var(--btn-hover-ink-strong);
}

.tool-icon {
    width: 42px;
    height: 42px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    flex-shrink: 0;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.tool-info {
    flex: 1;
    min-width: 0;
}

.tool-name {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.tool-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    opacity: 0.85;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.collapsible-section {
    overflow: hidden;
    transition: max-height 0.6s var(--ease-out-expo), opacity 0.4s ease, margin 0.5s ease;
    max-height: 0;
    opacity: 0;
    margin-bottom: 0;
}

.collapsible-section.expanded {
    max-height: 300px;
    opacity: 1;
    margin-bottom: 0.5rem;
}

.collapsible-section .btn {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.45s var(--ease-out-expo), transform 0.45s var(--ease-out-expo);
}

.collapsible-section.expanded .btn {
    opacity: 1;
    transform: translateY(0);
}

.collapsible-section.expanded .btn:nth-child(1) {
    transition-delay: 0.06s;
}

.collapsible-section.expanded .btn:nth-child(2) {
    transition-delay: 0.12s;
}

.collapsible-section.expanded .btn:nth-child(3) {
    transition-delay: 0.18s;
}

.collapsible-section.expanded .btn:nth-child(4) {
    transition-delay: 0.24s;
}

/* ============================================================ */
/* === 按钮组件 ===                                              */
/* 使用: class="btn" 需配合 JS 设置 --bx/--by/--sx/--sy/--si     */
/* ============================================================ */

.btn {
    --bx: -1000px;
    --by: -1000px;
    --sx: -1000px;
    --sy: -1000px;
    --si: 0;
    position: relative;
    color: var(--text-primary);
    padding: 14px 0;
    border-radius: var(--card-radius);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: transform 0.4s var(--ease-out-expo), color 0.3s ease, background 0.5s ease;
    flex: 1 1 120px;
    max-width: 200px;
    white-space: nowrap;
    overflow: hidden;
    margin: 6px;
    border: 1px solid transparent;
    background:
        linear-gradient(var(--btn-bg), var(--btn-bg)),
        radial-gradient(var(--btn-spotlight-size) circle at var(--bx) var(--by), var(--btn-hover-glow), transparent 100%);
    background-clip: padding-box, padding-box;
    will-change: transform;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform: translateZ(0);
    outline: none;
    box-shadow: 0 0 1px rgba(255, 255, 255, 0.05);
    cursor: pointer;
    user-select: none;
}

.btn::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background:
        radial-gradient(var(--btn-spotlight-size) circle at var(--bx) var(--by), rgba(var(--btn-border-rgb), 0.85), transparent 100%),
        radial-gradient(var(--btn-source-size) circle at var(--sx) var(--sy), rgba(var(--btn-source-rgb), calc(0.9 * var(--si))), transparent 80%),
        linear-gradient(var(--btn-base-border), var(--btn-base-border));
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-image: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-image: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    z-index: 2;
    transition: opacity 0.3s ease, padding 0.3s ease;
}

.btn:hover::before {
    padding: 1px;
}

.btn::after {
    content: "";
    position: absolute;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: var(--btn-hover-bg);
    left: var(--press-x, var(--bx));
    top: var(--press-y, var(--by));
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
    pointer-events: none;
    z-index: 1;
    transition: transform 0.5s var(--ease-out-expo), opacity 0.3s ease;
}

.btn:hover {
    transform: scale(1.01) translateZ(0);
    z-index: 10;
}

.btn:active::after,
.btn.is-pressed::after {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.btn:active,
.btn.is-pressed {
    transform: scale(0.99) translateZ(0);
    color: var(--btn-hover-text);
}

.btn span {
    position: relative;
    z-index: 5;
}

.btn:active span,
.btn.is-pressed span {
    text-shadow: var(--btn-active-shadow);
}

#mastodon-link {
    flex: 0 0 0;
    width: 0;
    min-width: 0;
    max-width: 0;
    margin: 0;
    padding: 0;
    opacity: 0;
    pointer-events: none;
    overflow: hidden;
    transition: all 0.6s var(--ease-elastic), opacity 0.4s ease;
}

#mastodon-link.active {
    flex: 1 1 120px;
    max-width: 200px;
    min-width: 120px;
    margin: 6px;
    padding: 14px 0;
    opacity: 1;
    pointer-events: auto;
}

.expand-trigger {
    cursor: default !important;
    transition: color 0.3s ease;
    touch-action: manipulation;
}

#follow-tooltip {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10000;
    pointer-events: none;
    transform: translate3d(var(--tx), var(--ty), 0);
}

.tooltip-content {
    width: max-content;
    max-width: 200px;
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
    padding: 8px 14px;
    border-radius: 10px;
    font-size: 0.8rem;
    font-weight: 600;
    text-shadow: none;
    margin-left: 20px;
    margin-top: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transform-origin: 0 0;
    transform: scale(0);
    opacity: 0;
    transition: transform 0.4s var(--ease-pop), opacity 0.2s ease;
    backdrop-filter: blur(8px) saturate(1.2);
    -webkit-backdrop-filter: blur(8px) saturate(1.2);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

#follow-tooltip.visible .tooltip-content {
    opacity: 1;
    transform: scale(1);
}

/* ============================================================ */
/* === 图标按钮 ===                                              */
/* ============================================================ */

.icon-btn {
    --bx: -1000px;
    --by: -1000px;
    --sx: -1000px;
    --sy: -1000px;
    --si: 0;
    background:
        linear-gradient(var(--input-bg), var(--input-bg)),
        radial-gradient(90px circle at var(--bx) var(--by), var(--btn-hover-glow), transparent 100%);
    border: 1px solid transparent;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    padding: 8px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.2s var(--ease-out-expo), color 0.2s ease, box-shadow 0.2s ease;
    position: relative;
    overflow: hidden;
    background-clip: padding-box, padding-box;
}

.icon-btn::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background:
        radial-gradient(90px circle at var(--bx) var(--by), rgba(var(--btn-border-rgb), 0.6), transparent 100%),
        radial-gradient(var(--btn-source-size) circle at var(--sx) var(--sy), rgba(var(--btn-source-rgb), calc(0.6 * var(--si))), transparent 80%),
        linear-gradient(var(--btn-base-border), var(--btn-base-border));
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-image: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-image: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    z-index: 2;
}

.icon-btn::after {
    content: "";
    position: absolute;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: var(--btn-hover-bg);
    left: var(--press-x, var(--bx));
    top: var(--press-y, var(--by));
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
    pointer-events: none;
    z-index: 1;
    transition: transform 0.4s var(--ease-out-expo), opacity 0.25s ease;
}

.icon-btn svg {
    width: 16px;
    height: 16px;
    stroke-width: 2;
    position: relative;
    z-index: 3;
}

.icon-btn:hover:not(:disabled) {
    background:
        linear-gradient(var(--glass-surface), var(--glass-surface)),
        radial-gradient(90px circle at var(--bx) var(--by), var(--btn-hover-glow), transparent 100%);
    color: var(--text-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-btn);
}

.icon-btn:active::after,
.icon-btn.is-pressed::after {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.icon-btn:active:not(:disabled),
.icon-btn.is-pressed:not(:disabled) {
    color: var(--btn-hover-text);
}

.icon-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.icon-btn.danger:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.15);
    color: #fca5a5;
}

/* ============================================================ */
/* === 状态徽章 ===                                              */
/* ============================================================ */

.badge {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    padding: 0 14px;
    height: 34px;
    display: flex;
    align-items: center;
    background: var(--input-bg);
    color: var(--text-muted);
    border: 1px solid var(--input-border);
    border-radius: 99px;
    cursor: pointer;
    transition: all 0.2s;
    user-select: none;
}

.badge:hover {
    background: var(--glass-surface);
    color: var(--text-primary);
}

.badge[data-s="enc"] {
    background: var(--s-enc-bg);
    color: var(--s-enc-txt);
}

.badge[data-s="dec"] {
    background: var(--s-dec-bg);
    color: var(--s-dec-txt);
}

.badge[data-s="err"] {
    background: var(--s-err-bg);
    color: var(--s-err-txt);
}

.badge[data-s="warn"] {
    background: var(--s-warn-bg);
    color: var(--s-warn-txt);
}

/* ============================================================ */
/* === 返回按钮 ===                                              */
/* ============================================================ */

.back-btn {
    --bx: -1000px;
    --by: -1000px;
    --sx: -1000px;
    --sy: -1000px;
    --si: 0;
    background:
        linear-gradient(var(--input-bg), var(--input-bg)),
        radial-gradient(var(--btn-spotlight-size) circle at var(--bx) var(--by), var(--btn-hover-glow), transparent 100%);
    border: 1px solid transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    padding: 10px 18px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: all 0.3s var(--ease-out-expo);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    position: relative;
    background-clip: padding-box, padding-box;
    overflow: hidden;
}

.back-btn::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background:
        radial-gradient(var(--btn-spotlight-size) circle at var(--bx) var(--by), rgba(var(--btn-border-rgb), 0.6), transparent 100%),
        radial-gradient(var(--btn-source-size) circle at var(--sx) var(--sy), rgba(var(--btn-source-rgb), calc(0.6 * var(--si))), transparent 80%),
        linear-gradient(var(--btn-base-border), var(--btn-base-border));
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-image: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-image: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    z-index: 2;
}

.back-btn::after {
    content: "";
    position: absolute;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    background: var(--btn-hover-bg);
    left: var(--press-x, var(--bx));
    top: var(--press-y, var(--by));
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
    pointer-events: none;
    z-index: 1;
    transition: transform 0.5s var(--ease-out-expo), opacity 0.3s ease;
}

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

.back-btn:active::after,
.back-btn.is-pressed::after {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

.back-btn:active,
.back-btn.is-pressed {
    color: var(--btn-hover-text);
    transform: translateY(0);
    text-shadow: var(--btn-active-shadow);
}

.back-btn svg {
    width: 16px;
    height: 16px;
}

/* ============================================================ */
/* === 输入框 ===                                                */
/* ============================================================ */

textarea,
input[type="text"],
input[type="number"] {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: 'JetBrains Mono', 'SF Mono', Consolas, monospace;
    line-height: 1.6;
    padding: 16px 20px;
    transition: all 0.2s;
    resize: none;
}

textarea:focus,
input:focus {
    background: var(--glass-surface);
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent), var(--shadow-btn);
}

textarea::placeholder,
input::placeholder {
    color: var(--text-secondary);
    opacity: 0.5;
}

/* ============================================================ */
/* === 弹窗/Popover ===                                          */
/* ============================================================ */

.popover {
    position: absolute;
    background: var(--modal-bg);
    backdrop-filter: blur(16px) saturate(150%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
    box-shadow: var(--shadow-pop);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 20px;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.95);
    transition: all 0.3s var(--ease-elastic);
}

.popover.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

/* ============================================================ */
/* === 开关组件 ===                                              */
/* ============================================================ */

.switch {
    position: relative;
    display: inline-block;
    width: 40px;
    height: 22px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    inset: 0;
    background: var(--input-bg);
    border-radius: 24px;
    transition: 0.3s;
    cursor: pointer;
    border: 1px solid var(--input-border);
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 2px;
    bottom: 2px;
    background: #fff;
    border-radius: 50%;
    transition: 0.3s var(--ease-out-expo);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

input:checked+.slider {
    background: var(--accent);
    border-color: var(--accent);
}

input:checked+.slider:before {
    transform: translateX(18px);
}

/* ============================================================ */
/* === 响应式 ===                                                */
/* ============================================================ */

@media (max-width: 768px) {
    :root {
        --card-padding: 1.5rem;
        --h1-size: 2rem;
        --glass-edge-size: 2px;
    }

    .glass-card {
        width: 92%;
    }

    .app-shell {
        width: 95%;
        border-radius: 24px;
        gap: 20px;
    }

    .bento-grid {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0;
        margin: 0 -5px 1rem -5px;
    }

    .bento-grid .btn {
        margin: 5px;
        width: auto;
        max-width: none;
        flex: 1 1 40%;
    }

    #follow-tooltip {
        display: none;
    }
}