/* ===== Young Mobile - Global Styles ===== */
/* Tech Blue Theme: Primary #0066FF, Dark #0A0E27, Accent #00BCD4, Purple #7C4DFF */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --primary: #0066FF;
  --primary-light: #3385FF;
  --primary-dark: #0052CC;
  --accent: #00BCD4;
  --accent-purple: #7C4DFF;
  --dark-bg: #0A0E27;
  --dark-bg-light: #111833;
  --dark-surface: #0F1430;
  --light-bg: #F5F7FA;
  --light-surface: #FFFFFF;
  --text-primary: #1A1A2E;
  --text-secondary: #5A5A7A;
  --text-muted: #8A8AA0;
  --text-light: #FFFFFF;
  --text-light-secondary: rgba(255,255,255,0.7);
  --border-light: rgba(0,102,255,0.15);
  --border-glow: rgba(0,102,255,0.3);
  --success: #00C853;
  --warning: #FF9100;
  --danger: #FF1744;
  --gradient-primary: linear-gradient(135deg, #0066FF 0%, #00BCD4 100%);
  --gradient-purple: linear-gradient(135deg, #7C4DFF 0%, #0066FF 100%);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-glow: 0 0 30px rgba(0,102,255,0.15);
  --radius: 12px;
  --radius-lg: 16px;
  --radius-sm: 8px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--light-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ===== Utility Classes ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 960px; margin: 0 auto; padding: 0 24px; }

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient-purple {
  background: var(--gradient-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glass {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
}

.glass-light {
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 12px 28px; border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 600; text-decoration: none;
  cursor: pointer; border: none; transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--gradient-primary); color: #fff;
  box-shadow: 0 4px 16px rgba(0,102,255,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,102,255,0.4);
}
.btn-outline {
  background: transparent; color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-outline-light {
  background: transparent; color: #fff;
  border: 2px solid rgba(255,255,255,0.3);
}
.btn-outline-light:hover {
  background: rgba(255,255,255,0.1); border-color: #fff;
}
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-lg { padding: 16px 36px; font-size: 16px; }

/* ===== Cards ===== */
.card {
  background: var(--light-surface);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(0,0,0,0.04);
  transition: var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.12), 0 0 0 1px var(--border-glow);
}
.card-dark {
  background: var(--dark-surface);
  border: 1px solid rgba(255,255,255,0.06);
  color: var(--text-light);
}
.card-dark:hover {
  box-shadow: 0 12px 40px rgba(0,0,0,0.3), 0 0 30px rgba(0,102,255,0.1);
  border-color: rgba(0,102,255,0.2);
}

/* ===== Section Styles ===== */
.section { padding: 100px 0; }
.section-dark {
  background: var(--dark-bg);
  color: var(--text-light);
  position: relative;
  overflow: hidden;
}
.section-dark::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(0,102,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.section-title {
  font-size: 40px; font-weight: 800; line-height: 1.2; margin-bottom: 16px;
}
.section-subtitle {
  font-size: 18px; color: var(--text-secondary); max-width: 600px;
}
.section-dark .section-subtitle { color: var(--text-light-secondary); }

/* ===== Navigation ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}
.nav.scrolled {
  background: rgba(10, 14, 39, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: #fff; font-weight: 700; font-size: 18px;
}
.nav-logo svg { height: 32px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
.nav-links a {
  color: rgba(255,255,255,0.8); text-decoration: none; font-size: 14px;
  font-weight: 500; transition: var(--transition); position: relative;
}
.nav-links a:hover, .nav-links a.active { color: #fff; }
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px; background: var(--accent);
  transition: width 0.3s ease;
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: 16px; }

.lang-switcher {
  display: flex; gap: 4px; background: rgba(255,255,255,0.08);
  border-radius: 20px; padding: 3px;
}
.lang-switcher button {
  background: none; border: none; color: rgba(255,255,255,0.6);
  font-size: 12px; font-weight: 600; padding: 4px 10px;
  border-radius: 16px; cursor: pointer; transition: var(--transition);
}
.lang-switcher button.active {
  background: var(--primary); color: #fff;
}
.lang-switcher button:hover:not(.active) { color: #fff; }

/* Mobile nav */
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav-toggle span {
  display: block; width: 24px; height: 2px;
  background: #fff; border-radius: 2px; transition: var(--transition);
}
@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .nav-links, .nav-actions { display: none; }
  .nav-links.open, .nav-actions.open {
    display: flex; flex-direction: column;
    position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(10,14,39,0.98); padding: 24px;
    gap: 20px;
  }
}

/* ===== Footer ===== */
.footer {
  background: var(--dark-bg);
  color: var(--text-light-secondary);
  padding: 64px 0 32px;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px; margin-bottom: 48px;
}
.footer-brand { max-width: 280px; }
.footer-brand p { margin-top: 16px; font-size: 14px; line-height: 1.7; }
.footer-title { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 20px; text-transform: uppercase; letter-spacing: 0.5px; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { color: var(--text-light-secondary); text-decoration: none; font-size: 14px; transition: var(--transition); }
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.05);
  font-size: 13px; color: rgba(255,255,255,0.4);
}
.footer-social { display: flex; gap: 16px; }
.footer-social a {
  color: rgba(255,255,255,0.4); font-size: 18px; transition: var(--transition);
}
.footer-social a:hover { color: var(--accent); }
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(0,102,255,0.2); }
  50% { box-shadow: 0 0 40px rgba(0,102,255,0.4); }
}
@keyframes countUp {
  from { opacity: 0; transform: scale(0.5); }
  to { opacity: 1; transform: scale(1); }
}

.animate-on-scroll {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-on-scroll.visible {
  opacity: 1; transform: translateY(0);
}

/* ===== Code Blocks ===== */
.code-block {
  background: var(--dark-bg); border-radius: var(--radius-sm);
  overflow: hidden; border: 1px solid rgba(255,255,255,0.06);
}
.code-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 16px; background: rgba(255,255,255,0.03);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.code-tabs { display: flex; gap: 4px; }
.code-tab {
  background: none; border: none; color: rgba(255,255,255,0.5);
  font-size: 13px; padding: 4px 12px; border-radius: 4px;
  cursor: pointer; transition: var(--transition);
}
.code-tab.active { background: rgba(0,102,255,0.2); color: var(--accent); }
.code-tab:hover:not(.active) { color: #fff; }
.code-copy {
  background: none; border: none; color: rgba(255,255,255,0.5);
  font-size: 12px; cursor: pointer; display: flex; align-items: center; gap: 4px;
}
.code-copy:hover { color: #fff; }
.code-body { padding: 16px; overflow-x: auto; }
.code-body pre { margin: 0; font-family: var(--font-mono); font-size: 13px; line-height: 1.7; color: #e0e0e0; }
.code-body .keyword { color: #ff79c6; }
.code-body .string { color: #f1fa8c; }
.code-body .comment { color: #6272a4; }
.code-body .function { color: #50fa7b; }
.code-body .number { color: #bd93f9; }

/* ===== Forms ===== */
.form-group { margin-bottom: 20px; }
.form-label {
  display: block; font-size: 14px; font-weight: 500;
  margin-bottom: 6px; color: var(--text-primary);
}
.form-input, .form-textarea, .form-select {
  width: 100%; padding: 12px 16px; border-radius: var(--radius-sm);
  border: 1px solid #ddd; background: #fff; font-size: 15px;
  font-family: var(--font-sans); transition: var(--transition);
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,102,255,0.1);
}
.form-textarea { min-height: 120px; resize: vertical; }
.form-dark .form-input, .form-dark .form-textarea, .form-dark .form-select {
  background: rgba(255,255,255,0.05); border-color: rgba(255,255,255,0.1);
  color: #fff;
}
.form-dark .form-input:focus, .form-dark .form-textarea:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0,188,212,0.1);
}
.form-dark .form-label { color: rgba(255,255,255,0.8); }

/* ===== Tables ===== */
.table-wrap { overflow-x: auto; border-radius: var(--radius); }
.data-table {
  width: 100%; border-collapse: collapse; font-size: 14px;
}
.data-table th {
  background: var(--dark-bg-light); color: #fff;
  padding: 14px 16px; text-align: left; font-weight: 600;
  border-bottom: 2px solid var(--primary);
}
.data-table td {
  padding: 14px 16px; border-bottom: 1px solid rgba(255,255,255,0.05);
  color: rgba(255,255,255,0.85);
}
.data-table tbody tr:hover { background: rgba(0,102,255,0.04); }
.data-table .status-available { color: var(--success); font-weight: 600; }
.data-table .status-limited { color: var(--warning); font-weight: 600; }
.data-table .price { color: var(--accent); font-weight: 600; font-family: var(--font-mono); }

/* ===== Pricing Cards ===== */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.pricing-card {
  background: var(--light-surface); border-radius: var(--radius-lg);
  padding: 32px; border: 2px solid transparent;
  transition: var(--transition); position: relative;
}
.pricing-card:hover { border-color: var(--border-light); transform: translateY(-4px); }
.pricing-card.featured {
  border-color: var(--primary);
  box-shadow: 0 8px 32px rgba(0,102,255,0.12);
}
.pricing-card.featured::before {
  content: 'Most Popular'; position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--gradient-primary); color: #fff;
  padding: 4px 16px; border-radius: 20px; font-size: 12px; font-weight: 600;
}
.pricing-name { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.pricing-desc { font-size: 14px; color: var(--text-secondary); margin-bottom: 20px; }
.pricing-price { font-size: 36px; font-weight: 800; margin-bottom: 4px; }
.pricing-price span { font-size: 16px; font-weight: 400; color: var(--text-muted); }
.pricing-features { list-style: none; margin: 24px 0; }
.pricing-features li {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 12px; font-size: 14px;
}
.pricing-features li i { color: var(--success); font-size: 12px; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .pricing-grid { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; }
}
@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .section-title { font-size: 28px; }
  .card { padding: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}