/* ============================================================
   quirel.dev — quirel 官网样式
   设计令牌完全沿用 quirel 客户端 (gnome-remote) variables.css
   Adwaita「纸张」暖色系 + 绿色强调色
   ============================================================ */

/* 字体：使用系统字体栈，不引入外部 CDN（更隐私、零请求、离线可用）。
   Linux / GNOME 下自动回退到 Cantarell，与 Adwaita 风格一致。 */

/* ── 令牌 · 亮色（与客户端 variables.css 一致）────────── */
:root {
  --q-accent:          #15aa70;
  --q-accent-hover:    #129864;
  --q-accent-active:   #0f8658;
  --q-accent-fg:       #ffffff;

  --q-window-bg:       #fafafa;
  --q-view-bg:         #faf5f3;
  --q-card-bg:         #faf5f3;
  --q-card-hover:      #ebe5d9;
  --q-headerbar-bg:    #f5f0e6;
  --q-sidebar-border:  #d5d0c4;

  --q-text-primary:    rgba(0, 0, 0, 0.87);
  --q-text-secondary:  rgba(0, 0, 0, 0.60);
  --q-text-disabled:   rgba(0, 0, 0, 0.38);

  --q-success:         #26a269;
  --q-success-fg:      #1b7f4d;
  --q-success-bg:      rgba(38, 162, 105, 0.08);
  --q-success-border:  rgba(38, 162, 105, 0.35);
  --q-error:           #e01b24;
  --q-danger-fg:       #c01c28;
  --q-danger-bg:       rgba(224, 27, 36, 0.08);
  --q-danger-border:   rgba(224, 27, 36, 0.35);

  --q-border:          rgba(0, 0, 0, 0.15);
  --q-border-soft:     rgba(0, 0, 0, 0.08);
  --q-border-focus:    #3584e4;

  --q-frosted-bg:      rgba(245, 240, 230, 0.78);
  --q-frosted-blur:    blur(24px) saturate(160%);
  --q-frosted-border:  rgba(0, 0, 0, 0.06);

  --radius-xs:  4px;
  --radius-sm:  8px;
  --radius-md:  12px;
  --radius-lg:  18px;
  --radius-pill: 9999px;

  --font-ui:   system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Cantarell', sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'Cascadia Code', 'Source Code Pro', Consolas, 'Liberation Mono', monospace;

  --shadow-card:  0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-popup: 0 4px 16px rgba(0, 0, 0, 0.15);
  --shadow-modal: 0 8px 32px rgba(0, 0, 0, 0.2);

  --duration-fast:   150ms;
  --duration-normal: 200ms;
  --duration-slow:   300ms;
  --ease-out:        cubic-bezier(0.25, 0, 0, 1);

  --headerbar-height: 56px;
  --container-max:    1080px;
}

/* ── 令牌 · 暗色（暖色调暗色模式，与纸张主题同族）────── */
[data-theme="dark"] {
  --q-accent:          #2fbf7f;
  --q-accent-hover:    #38cc8a;
  --q-accent-active:   #27a86e;
  --q-accent-fg:       #0c221a;

  --q-window-bg:       #262220;
  --q-view-bg:         #2b2622;
  --q-card-bg:         #2b2622;
  --q-card-hover:      #38312b;
  --q-headerbar-bg:    #302a25;
  --q-sidebar-border:  #4a423a;

  --q-text-primary:    rgba(255, 255, 255, 0.87);
  --q-text-secondary:  rgba(255, 255, 255, 0.60);
  --q-text-disabled:   rgba(255, 255, 255, 0.38);

  --q-success:         #33d17a;
  --q-success-fg:      #5be3a1;
  --q-success-bg:      rgba(51, 209, 122, 0.16);
  --q-success-border:  rgba(51, 209, 122, 0.5);
  --q-danger-fg:       #f66151;
  --q-danger-bg:       rgba(224, 27, 36, 0.16);
  --q-danger-border:   rgba(224, 27, 36, 0.5);

  --q-border:          rgba(255, 255, 255, 0.14);
  --q-border-soft:     rgba(255, 255, 255, 0.07);
  --q-border-focus:    #62a0ea;

  --q-frosted-bg:      rgba(38, 34, 32, 0.78);
  --q-frosted-border:  rgba(255, 255, 255, 0.06);

  --shadow-card:  0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-popup: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-modal: 0 8px 32px rgba(0, 0, 0, 0.55);
}

/* ── Reset ─────────────────────────────────────────────── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.6;
  color: var(--q-text-primary);
  background: var(--q-window-bg);
  -webkit-font-smoothing: antialiased;
  transition: background var(--duration-normal) var(--ease-out),
              color var(--duration-normal) var(--ease-out);
}

img, svg { display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

/* 键盘聚焦可见性（无障碍）：仅键盘导航时显示描边 */
a:focus-visible,
button:focus-visible,
.btn:focus-visible,
input:focus-visible {
  outline: 2px solid var(--q-border-focus);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}
.btn-primary:focus-visible { outline-offset: 3px; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

section { scroll-margin-top: calc(var(--headerbar-height) + 16px); }

.text-mono {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.01em;
}

/* ── 状态圆点 ──────────────────────────────────────────── */
.dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  flex-shrink: 0;
}
.dot-online { background: var(--q-success); box-shadow: 0 0 0 3px color-mix(in srgb, var(--q-success) 18%, transparent); }
.dot-offline { background: var(--q-text-disabled); }

/* ── 按钮 ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9375rem;
  line-height: 1.3;
  white-space: nowrap;
  transition: background var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}
.btn svg { width: 16px; height: 16px; }

.btn-primary {
  background: var(--q-accent);
  color: var(--q-accent-fg);
  box-shadow: var(--shadow-card);
}
.btn-primary:hover  { background: var(--q-accent-hover); }
.btn-primary:active { background: var(--q-accent-active); transform: translateY(1px); }

.btn-secondary {
  background: transparent;
  color: var(--q-text-primary);
  border: 1px solid var(--q-border);
}
.btn-secondary:hover { background: var(--q-card-hover); border-color: var(--q-sidebar-border); }

.btn-sm   { padding: 7px 16px; font-size: 0.875rem; }
.btn-lg   { padding: 13px 28px; font-size: 1rem; }
.btn-block { width: 100%; }

/* ── HeaderBar（毛玻璃）────────────────────────────────── */
.headerbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--headerbar-height);
  background: var(--q-frosted-bg);
  -webkit-backdrop-filter: var(--q-frosted-blur);
  backdrop-filter: var(--q-frosted-blur);
  border-bottom: 1px solid var(--q-frosted-border);
  transition: box-shadow var(--duration-normal) var(--ease-out);
}
.headerbar.is-scrolled { box-shadow: var(--shadow-card); }

.headerbar-inner {
  max-width: var(--container-max);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-mark { width: 28px; height: 28px; }
.brand-name {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.nav {
  display: flex;
  gap: 4px;
  margin-left: auto;
}
.nav a {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--q-text-secondary);
  transition: color var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out);
}
.nav a:hover { color: var(--q-text-primary); background: var(--q-card-hover); }

.headerbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-pill);
  color: var(--q-text-secondary);
  transition: background var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}
.icon-btn:hover { background: var(--q-card-hover); color: var(--q-text-primary); }
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn .icon-moon { display: none; }
[data-theme="dark"] .icon-btn .icon-sun  { display: none; }
[data-theme="dark"] .icon-btn .icon-moon { display: block; }

/* 移动端菜单按钮（默认隐藏，≤640px 由媒体查询显示） */
.menu-btn { display: none; }
.menu-btn .icon-close { display: none; }
.headerbar.nav-open .menu-btn .icon-menu  { display: none; }
.headerbar.nav-open .menu-btn .icon-close { display: block; }

/* 导航当前区块高亮 */
.nav a.active {
  color: var(--q-text-primary);
  background: var(--q-card-hover);
  font-weight: 600;
}

/* ── Hero ──────────────────────────────────────────────── */
.hero {
  position: relative;
  padding: calc(var(--headerbar-height) + 72px) 0 88px;
  text-align: center;
  overflow: hidden;
}
/* 品牌渐变柔光（琥珀→青），呼应 Logo */
.hero::before {
  content: "";
  position: absolute;
  inset: -30% -20% auto;
  height: 75%;
  background:
    radial-gradient(42% 55% at 32% 40%, rgba(255, 203, 82, 0.16), transparent 70%),
    radial-gradient(42% 55% at 68% 40%, rgba(58, 194, 230, 0.16), transparent 70%);
  pointer-events: none;
}
[data-theme="dark"] .hero::before {
  background:
    radial-gradient(42% 55% at 32% 40%, rgba(255, 203, 82, 0.10), transparent 70%),
    radial-gradient(42% 55% at 68% 40%, rgba(58, 194, 230, 0.10), transparent 70%);
}

.hero .container { position: relative; }

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  margin-bottom: 24px;
  border: 1px solid var(--q-border-soft);
  border-radius: var(--radius-pill);
  background: var(--q-card-bg);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--q-text-secondary);
}

.hero-title {
  font-size: clamp(2.25rem, 5.5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.hero-sub {
  max-width: 560px;
  margin: 0 auto 32px;
  font-size: 1.0625rem;
  color: var(--q-text-secondary);
}

.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.hero-meta { color: var(--q-text-secondary); }

/* ── Mockup（复刻客户端窗口）──────────────────────────── */
.mockup {
  max-width: 720px;
  margin: 56px auto 0;
  border: 1px solid var(--q-border);
  border-radius: var(--radius-md);
  background: var(--q-window-bg);
  box-shadow: var(--shadow-modal);
  overflow: hidden;
  text-align: left;
}

.mockup-headerbar {
  display: flex;
  align-items: center;
  height: 44px;
  padding: 0 12px;
  gap: 12px;
  background: var(--q-headerbar-bg);
  border-bottom: 1px solid var(--q-border-soft);
}
.mockup-back { width: 16px; height: 16px; color: var(--q-text-secondary); }
.mockup-title {
  flex: 1;
  text-align: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--q-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mockup-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-pill);
  color: var(--q-text-secondary);
  background: var(--q-card-hover);
}
.mockup-close svg { width: 12px; height: 12px; }

.mockup-body {
  display: flex;
  min-height: 300px;
}

.mockup-sidebar {
  width: 190px;
  flex-shrink: 0;
  padding: 12px 8px;
  background: var(--q-headerbar-bg);
  border-right: 1px solid var(--q-sidebar-border);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.mockup-search {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  margin-bottom: 8px;
  border: 1px solid var(--q-border-soft);
  border-radius: var(--radius-pill);
  background: var(--q-view-bg);
  font-size: 0.8125rem;
  color: var(--q-text-disabled);
}
.mockup-search svg { width: 13px; height: 13px; }

.mockup-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  color: var(--q-text-primary);
}
.mockup-item.is-active {
  background: color-mix(in srgb, var(--q-accent) 16%, transparent);
  color: var(--q-success-fg);
  font-weight: 600;
}
.mockup-item-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.mockup-item-tag {
  font-size: 0.6875rem;
  color: var(--q-text-secondary);
}

.mockup-screen {
  position: relative;
  flex: 1;
  background:
    radial-gradient(80% 90% at 20% 15%, rgba(58, 194, 230, 0.35), transparent 60%),
    radial-gradient(70% 80% at 85% 85%, rgba(255, 203, 82, 0.30), transparent 60%),
    linear-gradient(150deg, #1f4a52, #14262e);
}
[data-theme="dark"] .mockup-screen {
  background:
    radial-gradient(80% 90% at 20% 15%, rgba(58, 194, 230, 0.22), transparent 60%),
    radial-gradient(70% 80% at 85% 85%, rgba(255, 203, 82, 0.16), transparent 60%),
    linear-gradient(150deg, #17242a, #101a20);
}

/* Hero 应用截图（可经后台替换，默认显示示意图） */
.mockup-shot {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.mockup-cursor {
  position: absolute;
  top: 42%;
  left: 48%;
  width: 22px;
  height: 22px;
  filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.4));
}

.mockup-stats {
  position: absolute;
  left: 16px;
  bottom: 16px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: rgba(0, 0, 0, 0.55);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  color: rgba(255, 255, 255, 0.92);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

/* ── 通用 Section 标题 ─────────────────────────────────── */
.section-title {
  font-size: clamp(1.625rem, 3.5vw, 2.125rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  text-align: center;
  margin-bottom: 12px;
}
.section-sub {
  max-width: 520px;
  margin: 0 auto 48px;
  text-align: center;
  color: var(--q-text-secondary);
}

/* ── 特性 ──────────────────────────────────────────────── */
.features {
  padding: 88px 0;
  background: var(--q-view-bg);
  border-top: 1px solid var(--q-border-soft);
  border-bottom: 1px solid var(--q-border-soft);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature-card {
  padding: 28px 24px;
  border: 1px solid var(--q-border-soft);
  border-radius: var(--radius-md);
  background: var(--q-card-bg);
  box-shadow: var(--shadow-card);
  transition: background var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}
.feature-card:hover {
  background: var(--q-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-popup);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--q-accent) 13%, transparent);
  color: var(--q-accent);
}
.feature-icon svg { width: 20px; height: 20px; }

.feature-card h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 0.9375rem;
  color: var(--q-text-secondary);
}

/* ── 下载 ──────────────────────────────────────────────── */
.download {
  padding: 88px 0;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.download-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 32px 24px;
  border: 1px solid var(--q-border-soft);
  border-radius: var(--radius-md);
  background: var(--q-card-bg);
  box-shadow: var(--shadow-card);
  transition: transform var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
}
.download-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-popup);
}

.download-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  border-radius: var(--radius-md);
  background: var(--q-headerbar-bg);
  border: 1px solid var(--q-border-soft);
  color: var(--q-text-primary);
}
.download-icon svg { width: 22px; height: 22px; }

.download-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.download-req {
  font-size: 0.8125rem;
  color: var(--q-text-secondary);
  margin-bottom: 20px;
}
.download-card .btn { margin-top: auto; }
.download-size {
  margin-top: 12px;
  color: var(--q-text-secondary);
}

.download-note {
  margin-top: 32px;
  text-align: center;
  font-size: 0.875rem;
  color: var(--q-text-secondary);
}

/* ── 关于 ──────────────────────────────────────────────── */
.about {
  padding: 88px 0;
  background: var(--q-view-bg);
  border-top: 1px solid var(--q-border-soft);
}
.about-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* ── Footer ────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--q-border-soft);
  padding: 32px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
}
.footer-brand .brand-mark { width: 22px; height: 22px; }

.footer-nav {
  display: flex;
  gap: 4px;
  margin-left: auto;
}
.footer-nav a {
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  font-size: 0.875rem;
  color: var(--q-text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
}
.footer-nav a:hover { color: var(--q-text-primary); }

.footer-copy {
  color: var(--q-text-disabled);
}

/* ── 入场动画 ──────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ── 响应式 ────────────────────────────────────────────── */
@media (max-width: 900px) {
  .feature-grid,
  .download-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .menu-btn { display: inline-flex; }
  .br-mobile { display: none; }
  .hero { padding-top: calc(var(--headerbar-height) + 48px); }

  /* 顶部导航改为下拉面板 */
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 2px;
    margin: 0;
    padding: 8px;
    background: var(--q-frosted-bg);
    -webkit-backdrop-filter: var(--q-frosted-blur);
    backdrop-filter: var(--q-frosted-blur);
    border-bottom: 1px solid var(--q-frosted-border);
    box-shadow: var(--shadow-popup);
  }
  .headerbar.nav-open .nav { display: flex; }
  .nav a { padding: 12px 14px; font-size: 1rem; }

  .feature-grid,
  .download-grid { grid-template-columns: 1fr; }

  .mockup-sidebar { display: none; }
  .mockup-body { min-height: 220px; }

  .footer-inner { flex-direction: column; align-items: flex-start; gap: 12px; }
  .footer-nav { margin-left: 0; }
}