:root {
  --bg: #0a0a14;
  --surface: #121220;
  --accent: #00f3ff;
  --accent-glow: rgba(0, 243, 255, 0.5);
  --text: #e6e6ff;
  --text-muted: #a0a0cc;
  --border: #2a2a40;
  --success: #00ffaa;
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

body.rtl {
  font-family: 'Vazirmatn', sans-serif;
  direction: rtl;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

/* Language Toggle */
.lang-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
  display: flex;
  gap: 4px;
}

.lang-btn {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 12px;
  font-size: 14px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
}

.lang-btn.active,
.lang-btn:hover {
  background: var(--accent);
  color: #000;
  box-shadow: 0 0 8px var(--accent-glow);
}

/* Hero */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  background: linear-gradient(135deg, #0a0a14 0%, #15152a 100%);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  background: linear-gradient(90deg, #fff, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 1.4rem;
  max-width: 800px;
  margin: 0 auto 32px;
  color: var(--text-muted);
}

.cta .btn {
  font-size: 1.1rem;
  padding: 14px 36px;
}

/* Tabs Nav */
.tabs-nav {
  background: var(--surface);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  position: sticky;
  top: 0;
  z-index: 90;
}

.tabs-nav .container {
  display: flex;
  gap: 1px;
}

.tab-btn {
  flex: 1;
  background: transparent;
  color: var(--text-muted);
  border: none;
  padding: 18px 0;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
}

.tab-btn:hover {
  color: var(--text);
}

.tab-btn.active {
  color: var(--accent);
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 3px;
  background: var(--accent);
  border-radius: 3px;
  box-shadow: 0 0 10px var(--accent-glow);
}

/* Tab Content */
.tab-content {
  display: none;
  padding: 60px 0;
}

.tab-content.active {
  display: block;
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 32px;
  text-align: center;
  color: white;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.feature-card {
  background: var(--surface);
  border-radius: 12px;
  padding: 28px;
  text-align: center;
  border: 1px solid var(--border);
  transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 10px 30px rgba(0, 243, 255, 0.1);
}

.feature-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 16px;
  background: rgba(0, 243, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--accent);
  font-weight: bold;
}

.feature-card h3 {
  font-size: 1.4rem;
  margin-bottom: 12px;
  color: white;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  align-items: start;
}

.founder-card {
  background: var(--surface);
  border-radius: 12px;
  padding: 32px;
  text-align: center;
  border: 1px solid var(--border);
}

.founder-avatar {
  margin: 0 auto 20px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(0, 243, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.founder-card h3 {
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.role {
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 16px;
}

.bio {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.trust-list {
  padding-right: 1.5rem;
}

.trust-list li {
  margin-bottom: 10px;
  list-style: none;
  position: relative;
  padding-right: 24px;
}

.trust-list li::before {
  content: '';
  position: absolute;
  right: 0;
  top: 8px;
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
}

/* Services */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.service-card {
  background: var(--surface);
  border-radius: 12px;
  padding: 28px;
  border: 1px solid var(--border);
}

.service-card h3 {
  color: var(--accent);
  margin-bottom: 12px;
  font-size: 1.4rem;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info h3 {
  font-size: 1.6rem;
  margin-bottom: 20px;
  color: white;
}

.contact-info ul {
  list-style: none;
}

.contact-info li {
  margin-bottom: 16px;
  line-height: 1.5;
}

.neon-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.neon-link:hover {
  text-decoration: underline;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px;
  margin-bottom: 16px;
  background: rgba(30, 30, 50, 0.6);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: #777;
}

.contact-form button {
  margin-top: 8px;
}

.form-feedback {
  margin-top: 16px;
  padding: 12px;
  border-radius: 8px;
  font-weight: 600;
  text-align: center;
  display: none;
}

.form-feedback.success {
  background: rgba(0, 255, 170, 0.15);
  color: var(--success);
  border: 1px solid var(--success);
  display: block;
}

/* Buttons */
.btn {
  display: inline-block;
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s;
}

.btn:hover {
  background: var(--accent);
  color: #000;
  box-shadow: 0 0 15px var(--accent-glow);
}

.btn.neon {
  box-shadow: 0 0 10px var(--accent-glow);
}

.btn.full-width {
  width: 100%;
}

/* Footer */
.footer {
  background: var(--surface);
  padding: 24px 0;
  text-align: center;
  border-top: 1px solid var(--border);
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .hero-title { font-size: 2.5rem; }
  .hero-subtitle { font-size: 1.2rem; }
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .tabs-nav .container {
    flex-wrap: wrap;
  }
  .tab-btn {
    padding: 14px 8px;
    font-size: 0.95rem;
  }
}

@media (max-width: 480px) {
  .hero { padding: 60px 0 40px; }
  .hero-title { font-size: 2rem; }
  .section-title { font-size: 1.8rem; }
  .lang-toggle { top: 10px; right: 10px; }
}