/* CleanLock Website - Native macOS Design System */
/* 完全还原 SwiftUI 应用设计 */

:root {
  /* === Brand Colors (from DesignSystem.swift) === */
  --brand: rgb(64, 153, 255);        /* 0.25, 0.60, 1.0 */
  --brand-light: rgb(77, 166, 255);  /* 0.30, 0.65, 1.0 */
  --brand-dark: rgb(51, 128, 230);   /* 0.20, 0.50, 0.90 */

  /* === Keyboard Colors (from DesignSystem.swift) === */
  --keyboard-base: rgb(20, 20, 26);      /* 0.08, 0.08, 0.10 */
  --key-bg: rgb(41, 41, 46);             /* 0.16, 0.16, 0.18 */
  --key-bg-light: rgb(56, 56, 61);       /* 0.22, 0.22, 0.24 */
  --key-border: rgb(31, 31, 36);         /* 0.12, 0.12, 0.14 */
  --key-text: rgb(217, 217, 222);        /* 0.85, 0.85, 0.87 */
  --key-cleaned: var(--brand);
  --key-cleaned-glow: var(--brand-light);

  /* === Immersive Background === */
  --immersive-bg: rgb(10, 10, 15);       /* 0.04, 0.04, 0.06 */

  /* === Light Mode Semantic Colors === */
  --color-bg: #f5f5f7;
  --color-bg-secondary: #ffffff;
  --color-text: #1d1d1f;
  --color-text-secondary: #86868b;
  --color-text-tertiary: #aeaeb2;
  --color-border: rgba(0, 0, 0, 0.1);
  --color-card: rgba(255, 255, 255, 0.8);

  /* === Typography === */
  --font-system: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-rounded: -apple-system, BlinkMacSystemFont, 'SF Pro Rounded', 'SF Pro Display', sans-serif;
  --font-mono: 'SF Mono', SFMono-Regular, ui-monospace, Menlo, Monaco, monospace;

  /* === Spacing === */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 20px;
  --spacing-xxl: 24px;
  --spacing-xxxl: 32px;

  /* === Radius === */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* === Shadows === */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --shadow-keyboard: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* === Dark Mode === */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #000000;
    --color-bg-secondary: #1d1d1f;
    --color-text: #f5f5f7;
    --color-text-secondary: #a1a1a6;
    --color-text-tertiary: #6e6e73;
    --color-border: rgba(255, 255, 255, 0.1);
    --color-card: rgba(29, 29, 31, 0.8);
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-system);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === Typography === */
h1, h2, h3, h4 {
  font-family: var(--font-rounded);
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: 2.5rem; line-height: 1.1; }
h2 { font-size: 1.75rem; line-height: 1.2; margin-bottom: var(--spacing-lg); }
h3 { font-size: 1.125rem; line-height: 1.3; font-weight: 600; }

p {
  color: var(--color-text-secondary);
  max-width: 600px;
}

a {
  color: var(--brand);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover { color: var(--brand-light); }

/* === Layout === */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

/* === Navigation === */
.nav {
  position: fixed;
  top: 16px;
  left: 16px;
  right: 16px;
  z-index: 100;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

@media (prefers-color-scheme: dark) {
  .nav {
    background: rgba(29, 29, 31, 0.72);
  }
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
  padding: 0 var(--spacing-lg);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-rounded);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-text);
}

.nav-logo img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.nav-links {
  display: flex;
  gap: var(--spacing-xl);
  list-style: none;
}

.nav-links a {
  color: var(--color-text);
  font-size: 0.875rem;
  font-weight: 500;
  opacity: 0.8;
  transition: opacity 0.2s;
}

.nav-links a:hover { opacity: 1; }

/* === Hero Section === */
.hero {
  padding: 140px 0 80px;
  text-align: center;
}

.hero-icon {
  width: 96px;
  height: 96px;
  margin: 0 auto var(--spacing-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg), 0 0 60px rgba(64, 153, 255, 0.15);
}

.hero h1 {
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.125rem;
  margin: 0 auto var(--spacing-xxxl);
  line-height: 1.6;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 14px 28px;
  background: var(--color-text);
  color: var(--color-bg) !important;
  border-radius: 980px;
  font-weight: 600;
  font-size: 0.9375rem;
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
}

.hero-cta:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}

.hero-cta svg {
  width: 20px;
  height: 20px;
}

/* === Features === */
.features {
  padding: 80px 0;
}

.features h2 {
  text-align: center;
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

@media (max-width: 900px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  background: var(--color-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  width: 44px;
  height: 44px;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-light) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
}

.feature-card h3 {
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.feature-card p {
  font-size: 0.875rem;
  line-height: 1.5;
}

/* ========================================
   KEYBOARD PREVIEW - 1:1 还原 SwiftUI 实现
   ======================================== */

.keyboard-section {
  padding: 80px 0 100px;
  text-align: center;
}

.keyboard-section h2 {
  margin-bottom: var(--spacing-md);
}

.keyboard-section > .container > p {
  margin: 0 auto var(--spacing-xxxl);
  color: var(--color-text-secondary);
}

/* 键盘容器 - 模拟应用中的毛玻璃背景 */
.keyboard-wrapper {
  display: inline-block;
  padding: 48px;
  background: linear-gradient(180deg,
    rgba(45, 45, 45, 0.8) 0%,
    rgba(26, 26, 26, 0.9) 100%
  );
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-keyboard);
  position: relative;
}

/* 微妙的品牌色光晕 */
.keyboard-wrapper::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 400px;
  height: 400px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(64, 153, 255, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* 键盘底座 */
.keyboard-base {
  position: relative;
  z-index: 1;
  padding: 12px;
  background: linear-gradient(180deg,
    rgba(20, 20, 26, 0.95) 0%,
    var(--keyboard-base) 100%
  );
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

/* 键盘行 */
.keyboard-row {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-bottom: 4px;
}

.keyboard-row:last-child {
  margin-bottom: 0;
}

/* === 按键基础样式 === */
.key {
  --key-size: 40px;
  --key-height: var(--key-size);
  min-width: var(--key-size);
  height: var(--key-height);
  padding: 0 6px;
  background: linear-gradient(180deg,
    var(--key-bg-light) 0%,
    var(--key-bg) 100%
  );
  border: 1px solid var(--key-border);
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--key-text);
  font-family: var(--font-system);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: all 0.08s ease-out;
  cursor: default;
  user-select: none;
  position: relative;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.05) inset,
    0 -1px 0 rgba(0, 0, 0, 0.2) inset,
    0 2px 4px rgba(0, 0, 0, 0.2);
}

/* 按键符号 */
.key .symbol {
  font-size: 14px;
  opacity: 0.9;
}

/* === 清洁状态 - 品牌蓝色高亮 === */
.key.cleaned {
  background: linear-gradient(180deg,
    var(--brand-light) 0%,
    var(--brand) 100%
  );
  border-color: var(--brand);
  color: white;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.2) inset,
    0 -1px 0 rgba(0, 0, 0, 0.1) inset,
    0 0 20px rgba(64, 153, 255, 0.4),
    0 2px 8px rgba(64, 153, 255, 0.3);
}

/* === 占位符键 (F3-F6/TouchID) === */
.key.placeholder {
  background: linear-gradient(180deg,
    rgba(41, 41, 46, 0.5) 0%,
    rgba(31, 31, 36, 0.5) 100%
  );
  border-color: rgba(31, 31, 36, 0.5);
  color: transparent;
}

/* === 键宽度类 (基于 MacBook 布局) === */
/* 标准键 = 1.0u = 40px */
.key.w-1   { min-width: calc(var(--key-size) * 1.0); }
.key.w-1-25 { min-width: calc(var(--key-size) * 1.25 + 1px); }
.key.w-1-5 { min-width: calc(var(--key-size) * 1.5 + 2px); }
.key.w-2   { min-width: calc(var(--key-size) * 2.0 + 4px); }
.key.w-4-5 { min-width: calc(var(--key-size) * 4.5 + 14px); }  /* Space */

/* === 半高键 (箭头键) === */
.key.half-height {
  --key-height: calc(var(--key-size) * 0.48);
}

/* === 箭头键区域 (倒T形布局) === */
.arrow-keys {
  display: flex;
  align-items: flex-end;
  gap: 4px;
}

.arrow-up-down {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

/* === 功能键行特殊样式 === */
.keyboard-row.fn-row .key {
  font-size: 10px;
  letter-spacing: 0;
}

.keyboard-row.fn-row .key .symbol {
  font-size: 12px;
}

/* === 进度指示器 === */
.progress-section {
  margin-bottom: 32px;
}

.progress-bar-container {
  width: 200px;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  margin: 0 auto 16px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--brand) 0%, var(--brand-light) 100%);
  border-radius: 3px;
  transition: width 0.3s ease-out;
}

.progress-count {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.progress-count .current {
  font-family: var(--font-rounded);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--brand);
}

.progress-count .separator {
  font-size: 1rem;
  color: var(--color-text-tertiary);
}

.progress-count .total {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.progress-count .unit {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
  margin-left: 2px;
}

/* === 退出提示 === */
.exit-hint {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 24px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 980px;
  color: var(--color-text-tertiary);
  font-size: 0.75rem;
  font-weight: 500;
}

.exit-hint .esc-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 18px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
}

/* === Content Pages === */
.page-header {
  padding: 140px 0 48px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.page-content {
  padding: 48px 0 80px;
  max-width: 720px;
  margin: 0 auto;
}

.page-content h2 {
  margin-top: 48px;
  font-size: 1.375rem;
}

.page-content h2:first-child {
  margin-top: 0;
}

.page-content p,
.page-content li {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

.page-content ul {
  padding-left: var(--spacing-xl);
}

.page-content .last-updated {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
  margin-top: 48px;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

/* === Support Page === */
.support-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: 32px;
}

.support-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
}

.support-card h3 {
  margin-bottom: var(--spacing-sm);
}

.support-card p {
  margin: 0 auto var(--spacing-md);
  font-size: 0.875rem;
}

.support-card a.btn {
  display: inline-block;
  padding: 10px 20px;
  background: var(--brand);
  color: white !important;
  border-radius: 980px;
  font-size: 0.875rem;
  font-weight: 600;
  transition: background 0.2s;
}

.support-card a.btn:hover {
  background: var(--brand-light);
}

/* === FAQ === */
.faq-item {
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--color-border);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

/* === Footer === */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer p {
  margin: 0 auto;
  font-size: 0.875rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-md);
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.footer-links a:hover {
  color: var(--brand);
}

/* === Responsive === */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }

  .hero { padding-top: 120px; }
  .hero-icon { width: 72px; height: 72px; }

  .nav {
    top: 8px;
    left: 8px;
    right: 8px;
  }

  .nav-links { display: none; }

  /* 移动端键盘缩放 */
  .keyboard-wrapper {
    padding: 24px;
    margin: 0 -12px;
  }

  .keyboard-base {
    padding: 8px;
  }

  .key {
    --key-size: 26px;
    font-size: 8px;
    border-radius: 3px;
  }

  .key .symbol {
    font-size: 10px;
  }

  .keyboard-row {
    gap: 2px;
    margin-bottom: 2px;
  }

  .arrow-keys { gap: 2px; }
  .arrow-up-down { gap: 1px; }

  .progress-section {
    margin-bottom: 24px;
  }

  .progress-count .current { font-size: 1.25rem; }
}