/* ProxyTorrent Marketing Site Styles */

:root {
  --color-bg: #0d1117;
  --color-bg-secondary: #161b22;
  --color-border: #30363d;
  --color-text: #c9d1d9;
  --color-text-secondary: #8b949e;
  --color-accent: #58a6ff;
  --color-accent-hover: #79c0ff;
  --color-success: #3fb950;
  --font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
  --font-arabic: "Segoe UI", "Arial", "Noto Naskh Arabic", "Noto Sans Arabic", sans-serif;
  --font-chinese: "Segoe UI", "Microsoft YaHei", "微软雅黑", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
  --spacing-unit: 1rem;
  --max-width: 1200px;
  --border-radius: 6px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-system);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
}

/* Arabic font stack */
body[lang="ar"] {
  font-family: var(--font-arabic);
}

/* Chinese font stack */
body[lang="zh"] {
  font-family: var(--font-chinese);
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 calc(var(--spacing-unit) * 2);
}

/* Header */
header {
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  padding: calc(var(--spacing-unit) * 1.5) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  font-size: 1.75rem;
}

/* Navigation */
nav ul {
  display: flex;
  list-style: none;
  gap: calc(var(--spacing-unit) * 1.5);
  flex-wrap: wrap;
}

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

nav a:hover {
  color: var(--color-accent);
}

/* Language switcher */
.lang-switcher {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.lang-switcher a {
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: all 0.2s;
}

.lang-switcher a:hover {
  background: var(--color-bg-secondary);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.lang-switcher a.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
}

/* Hero Section */
.hero {
  padding: calc(var(--spacing-unit) * 6) 0;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  margin-bottom: calc(var(--spacing-unit) * 1.5);
  line-height: 1.2;
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto calc(var(--spacing-unit) * 2.5) auto;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
}

.btn-secondary {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-secondary:hover {
  background: var(--color-bg-secondary);
  border-color: var(--color-accent);
}

/* Sections */
section {
  padding: calc(var(--spacing-unit) * 4) 0;
}

section:nth-child(even) {
  background: var(--color-bg-secondary);
}

section h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: calc(var(--spacing-unit) * 2);
  text-align: center;
}

section h3 {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  font-weight: 600;
  margin-bottom: var(--spacing-unit);
  color: var(--color-accent);
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: calc(var(--spacing-unit) * 2);
  margin-top: calc(var(--spacing-unit) * 2);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* Cards */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing-unit) * 2);
  transition: all 0.3s;
}

section:nth-child(even) .card {
  background: var(--color-bg-secondary);
}

.card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 4px 20px rgba(88, 166, 255, 0.15);
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: calc(var(--spacing-unit) * 1);
  display: block;
}

.card p {
  color: var(--color-text-secondary);
  margin-top: 0.75rem;
}

/* How it works - Steps */
.steps {
  counter-reset: step-counter;
}

.step {
  position: relative;
  padding-left: calc(var(--spacing-unit) * 4);
  margin-bottom: calc(var(--spacing-unit) * 3);
}

.step::before {
  counter-increment: step-counter;
  content: counter(step-counter);
  position: absolute;
  left: 0;
  top: 0;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--color-accent);
  color: var(--color-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
}

.step h3 {
  margin-bottom: 0.5rem;
}

.step p {
  color: var(--color-text-secondary);
}

/* Code blocks */
pre {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: calc(var(--spacing-unit) * 1.5);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
  margin: var(--spacing-unit) 0;
}

code {
  font-family: var(--font-mono);
  background: var(--color-bg-secondary);
  padding: 0.125rem 0.375rem;
  border-radius: 3px;
  font-size: 0.875em;
}

pre code {
  background: transparent;
  padding: 0;
}

/* Footer */
footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: calc(var(--spacing-unit) * 3) 0 calc(var(--spacing-unit) * 2) 0;
  margin-top: calc(var(--spacing-unit) * 4);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: calc(var(--spacing-unit) * 2);
  margin-bottom: calc(var(--spacing-unit) * 2);
}

.footer-section h4 {
  font-size: 1rem;
  margin-bottom: var(--spacing-unit);
  color: var(--color-text);
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-section a:hover {
  color: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: calc(var(--spacing-unit) * 1.5);
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    align-items: flex-start;
  }

  nav ul {
    flex-direction: column;
    gap: 0.75rem;
  }

  .hero {
    padding: calc(var(--spacing-unit) * 3) 0;
  }

  section {
    padding: calc(var(--spacing-unit) * 2.5) 0;
  }

  .step {
    padding-left: calc(var(--spacing-unit) * 3.5);
  }

  .step::before {
    width: 2rem;
    height: 2rem;
    font-size: 1rem;
  }
}

/* RTL Support for Arabic */
[dir="rtl"] {
  direction: rtl;
}

[dir="rtl"] .logo {
  flex-direction: row-reverse;
}

[dir="rtl"] nav ul {
  flex-direction: row-reverse;
}

[dir="rtl"] .lang-switcher {
  flex-direction: row-reverse;
}

[dir="rtl"] .hero-cta {
  flex-direction: row-reverse;
}

[dir="rtl"] .step {
  padding-left: 0;
  padding-right: calc(var(--spacing-unit) * 4);
}

[dir="rtl"] .step::before {
  left: auto;
  right: 0;
}

[dir="rtl"] pre {
  direction: ltr;
  text-align: left;
}

@media (max-width: 768px) {
  [dir="rtl"] .step {
    padding-right: calc(var(--spacing-unit) * 3.5);
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Focus styles */
a:focus,
button:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  header {
    position: static;
  }

  .lang-switcher,
  .hero-cta,
  footer {
    display: none;
  }
}