/* SilentTrace Studio — 科技简洁主题（全站共享） */

:root {
    --nav-height: 64px;
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --navbar-offset: calc(var(--nav-height) + var(--safe-top));

    --canvas: #f3f6fb;
    --canvas-deep: #e8edf5;
    --ink: #0b1220;
    --ink-soft: #3d4a5c;
    --ink-muted: #6b7a90;
    --line: rgba(11, 18, 32, 0.08);
    --line-strong: rgba(11, 18, 32, 0.14);

    --accent: #0ea5e9;
    --accent-deep: #0284c7;
    --accent-bright: #38bdf8;
    --accent-glow: rgba(14, 165, 233, 0.22);

    --bg: var(--canvas);
    --bg-elevated: rgba(255, 255, 255, 0.82);
    --bg-card: rgba(255, 255, 255, 0.72);
    --bg-card-solid: #ffffff;
    --bg-nav: rgba(243, 246, 251, 0.78);

    --text-primary: var(--ink);
    --text-secondary: var(--ink-soft);
    --text-muted: var(--ink-muted);
    --border: var(--line);
    --border-strong: rgba(14, 165, 233, 0.28);

    --primary: var(--accent);
    --primary-light: var(--accent-bright);
    --primary-dark: var(--accent-deep);
    --secondary: var(--accent-bright);
    --accent-brand: var(--accent);
    --cyan: var(--accent-bright);
    --purple: var(--accent-deep);
    --pink: var(--accent);

    --primary-tint: var(--accent-glow);
    --primary-tint-border: rgba(14, 165, 233, 0.22);
    --primary-tint-bg: rgba(14, 165, 233, 0.06);

    --shadow-sm: 0 1px 2px rgba(11, 18, 32, 0.04), 0 8px 24px rgba(11, 18, 32, 0.05);
    --shadow: 0 2px 8px rgba(11, 18, 32, 0.06), 0 16px 40px rgba(11, 18, 32, 0.07);
    --shadow-lg: 0 4px 16px rgba(11, 18, 32, 0.08), 0 24px 56px rgba(11, 18, 32, 0.09);
    --shadow-xl: 0 8px 32px rgba(11, 18, 32, 0.1), 0 32px 72px rgba(11, 18, 32, 0.1);
    --gradient-primary: linear-gradient(135deg, var(--accent-deep) 0%, var(--accent) 55%, var(--accent-bright) 100%);

    --font-serif: "Outfit", "PingFang SC", "Hiragino Sans GB", sans-serif;
    --font-display: var(--font-serif);
    --font-body: "Outfit", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, monospace;

    --radius-lg: 14px;
    --radius-sm: 10px;
    --radius-pill: 999px;
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --glass-blur: blur(16px);
    --glass-saturate: saturate(1.12);
}

html {
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.65;
    color: var(--text-primary);
    min-height: 100dvh;
    background:
        radial-gradient(ellipse 70% 50% at 100% 0%, rgba(14, 165, 233, 0.1), transparent 55%),
        radial-gradient(ellipse 50% 40% at 0% 100%, rgba(2, 132, 199, 0.06), transparent 50%),
        linear-gradient(180deg, var(--canvas) 0%, #eef2f8 100%);
    background-attachment: fixed;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    opacity: 0.55;
    background-image:
        linear-gradient(rgba(11, 18, 32, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(11, 18, 32, 0.035) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse 85% 75% at 50% 35%, #000 20%, transparent 72%);
}

body::after {
    display: none;
}

/* ---- Frosted surfaces (全站毛玻璃) ---- */
.content-panel,
.collection-card,
.tool-card,
.upload-zone,
.dock-item,
.news-card,
.works-card,
.tool-workspace,
.gallery-hd,
.gallery-card,
.safety-note,
.feed-intro,
.download-panel,
.value-card,
.feature-block,
.scenario-card,
.showcase-frame,
.page-intro,
.resume-header,
.resume-section,
.tool-header-card,
.install-panel,
.install-steps {
    backdrop-filter: var(--glass-blur, blur(18px)) var(--glass-saturate, saturate(1.18));
    -webkit-backdrop-filter: var(--glass-blur, blur(18px)) var(--glass-saturate, saturate(1.18));
}

::selection {
    background: rgba(14, 165, 233, 0.18);
    color: var(--ink);
}

/* ---- Typography (全站) ---- */
h1, h2, h3, h4, h5, h6,
.hero-title-main,
.logo-wordmark,
.page-header h1,
.feed-intro p,
.collection-card h3,
.tool-card h3,
.news-title,
.tool-header h1,
.resume-header h1,
.section-title,
.cta-title {
    font-family: var(--font-body);
    font-weight: 600;
    letter-spacing: -0.03em;
}

button,
input,
select,
textarea {
    font-family: inherit;
}

code,
pre,
kbd,
.hero-badge,
.hero-subtitle,
.dock-num,
.news-date,
.news-meta,
.page-meta,
.badge,
.logo-sub {
    font-family: var(--font-mono);
}

/* ---- Chrome ---- */
.navbar {
    backdrop-filter: var(--glass-blur) var(--glass-saturate);
    -webkit-backdrop-filter: var(--glass-blur) var(--glass-saturate);
    border-bottom-color: var(--line);
}

.nav-link {
    border-radius: var(--radius-pill);
    font-family: var(--font-body);
}

.nav-link.active {
    color: var(--accent-deep);
    background: var(--primary-tint-bg);
}

.content-panel,
.news-card,
.works-card,
.tool-card,
.upload-zone,
.dock-item,
.collection-card,
.resume-header,
.resume-section {
    border-radius: var(--radius-lg);
    border-color: var(--line);
}

.content-panel,
.collection-card,
.tool-card,
.upload-zone,
.dock-item {
    background: var(--bg-card-solid);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.collection-card,
.tool-card {
    border-left: 2px solid rgba(14, 165, 233, 0.45);
    cursor: pointer;
}

.collection-card:hover,
.tool-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow);
}

.btn,
.btn-primary,
.btn-secondary,
.btn-ghost {
    font-family: var(--font-body);
    border-radius: var(--radius-pill);
}

.btn-primary {
    box-shadow: 0 4px 20px rgba(14, 165, 233, 0.28);
}

.footer {
    background: rgba(243, 246, 251, 0.72);
    border-top: 1px solid var(--line);
    backdrop-filter: var(--glass-blur) var(--glass-saturate);
    -webkit-backdrop-filter: var(--glass-blur) var(--glass-saturate);
    font-family: var(--font-body);
    width: 100%;
    box-sizing: border-box;
}

body.home-page .footer,
body[data-page="index"] .footer {
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

/* 粘性页脚：落地页不加载 pages.css，必须放全站主题 */
body.subpage {
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding-bottom: 0;
}

body.subpage .page-main,
body.subpage .tool-page,
body.subpage main,
body.subpage .resume-wrapper {
    flex: 1 1 auto;
    width: 100%;
}

body.subpage .footer {
    position: relative;
    bottom: auto;
    left: auto;
    right: auto;
    z-index: 1;
    margin-top: auto;
    flex: 0 0 auto;
    align-self: stretch;
    width: 100%;
    max-width: none;
}

.feed-intro {
    border-bottom-color: rgba(14, 165, 233, 0.14) !important;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.06), rgba(255, 255, 255, 0.9)) !important;
}

.feed-intro p {
    font-family: var(--font-body) !important;
    font-weight: 600;
}

.collection-card h3 {
    font-family: var(--font-body);
    font-weight: 600;
}

.collection-card .badge {
    border-radius: var(--radius-pill);
}

.collection-card .icon,
.tool-icon {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    line-height: 1;
}

/* ---- Accessibility ---- */
.skip-link {
    position: absolute;
    top: -100%;
    left: 1rem;
    z-index: 10001;
    padding: 0.5rem 1rem;
    background: var(--accent);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    transition: top 0.2s var(--ease-out);
}

.skip-link:focus-visible {
    top: calc(var(--navbar-offset) + 0.5rem);
    outline: 2px solid var(--accent-deep);
    outline-offset: 2px;
}

.footer-links-row a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .hero-glow,
    .particle,
    .eyebrow-dot {
        animation: none !important;
    }

    .reveal,
    .reveal-delay-1,
    .reveal-delay-2,
    .reveal-delay-3 {
        animation: none !important;
    }
}