/* ===== Fonts ===== */
@import url("https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700&display=swap");

/* ===== CSS Variables ===== */
:root {
  --color-primary: #4299ff;
  --color-primary-dark: #3285eb;
  --color-primary-light: #5babff;

  --color-bg-primary: #0a0e17;
  --color-bg-secondary: #0f1520;
  --color-bg-tertiary: #141c2b;
  --color-bg-card: #1a2332;
  --color-bg-card-hover: #1f2940;

  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-light: rgba(255, 255, 255, 0.12);

  --color-text-primary: #ffffff;
  --color-text-secondary: #a0aec0;
  --color-text-muted: #64748b;

  --color-success: #22c55e;

  --font-family: "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.2);
  --shadow-md: 0 4px 12px -2px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 12px 32px -4px rgb(0 0 0 / 0.4);
  --shadow-xl: 0 24px 48px -8px rgb(0 0 0 / 0.5);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-full: 9999px;
}

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

html {
  scroll-behavior: smooth;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: 8px 16px;
  z-index: 10000;
  font-size: 14px;
  border-radius: 0 0 4px 0;
}

.skip-link:focus {
  top: 0;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
}

ul {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  letter-spacing: -0.0375em;
}

/* ===== Container ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: all 0.3s ease;
}

.nav.scrolled {
  background: rgba(10, 14, 23, 0.9);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--color-border);
  padding: 14px 0;
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
}

.logo-img {
  height: 26px;
  width: auto;
}

.logo-img-footer {
  opacity: 0.85;
}

.logo-collab-x {
  font-size: 24px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: var(--color-text-primary);
}

.nav-link-api {
  color: var(--color-primary) !important;
}

.nav-link-api:hover {
  color: var(--color-primary-light) !important;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-menu-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text-secondary);
  border-radius: 1px;
  transition: all 0.25s ease;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
}

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

.btn-primary:hover {
  background: var(--color-primary-light);
  color: white;
}

.btn-primary.btn-light {
  font-weight: 500;
  color: white;
}

.btn-primary.btn-light:hover {
  color: white;
}

.btn-outline {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-light);
}

.btn-outline:hover {
  background: var(--color-bg-card);
  border-color: var(--color-border-light);
  color: var(--color-text-primary);
}

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

.btn-ghost:hover {
  background: var(--color-bg-card);
  color: var(--color-text-primary);
}

.btn-lg {
  padding: 13px 28px;
  font-size: 15px;
}

.btn-full {
  width: 100%;
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  padding: 160px 0 100px;
  text-align: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--color-bg-primary);
  z-index: -2;
}

.hero-bg::before {
  content: "";
  position: absolute;
  top: -40%;
  left: -20%;
  width: 80%;
  height: 100%;
  background: radial-gradient(ellipse, rgba(74, 144, 217, 0.15) 0%, transparent 70%);
  z-index: -1;
}

.hero-bg::after {
  content: "";
  position: absolute;
  bottom: -20%;
  right: -20%;
  width: 60%;
  height: 80%;
  background: radial-gradient(ellipse, rgba(74, 144, 217, 0.08) 0%, transparent 70%);
  z-index: -1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--color-success);
  border-radius: 50%;
}

.hero-title {
  font-size: clamp(38px, 5vw, 56px);
  font-weight: 600;
  line-height: 1.15;
  color: var(--color-text-primary);
  margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 17px;
  color: var(--color-text-secondary);
  max-width: 480px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

/* ===== Section Styles ===== */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-badge {
  display: inline-block;
  padding: 6px 12px;
  background: var(--color-bg-card);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--color-text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

/* ===== Features Section ===== */
.features {
  padding: 100px 0;
  background: var(--color-bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.feature-card {
  padding: 32px;
  background: var(--color-bg-tertiary);
  transition: background 0.2s ease;
}

.feature-card:hover {
  background: var(--color-bg-card-hover);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(74, 144, 217, 0.15);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ===== How It Works ===== */
.how-it-works {
  padding: 100px 0;
  background: var(--color-bg-primary);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step {
  text-align: center;
  padding: 32px 24px;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color 0.2s ease;
}

.step:hover {
  border-color: var(--color-border-light);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: white;
  font-size: 18px;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: 20px;
}

.step h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 10px;
}

.step p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* ===== Pricing Section ===== */
.pricing {
  padding: 100px 0;
  background: var(--color-bg-secondary);
}

.pricing-card {
  width: 380px;
  padding: 36px 32px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  text-align: center;
}

.pricing-header {
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-border);
}

.price {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 2px;
  margin-bottom: 8px;
}

.price-currency {
  font-size: 24px;
  font-weight: 500;
  margin-top: 10px;
  color: var(--color-text-secondary);
}

.price-amount {
  font-size: 64px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-text-primary);
}

.price-period {
  font-size: 16px;
  color: var(--color-text-muted);
  margin-top: auto;
  margin-bottom: 14px;
}

.price-note {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.price-note span {
  font-weight: 600;
  color: var(--color-primary);
}

.pricing-layout {
  display: flex;
  align-items: center;
}

.pricing-controls {
  flex: 1;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding-right: 60px;
}

.pricing-configurator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  width: 320px;
}

.pricing-configurator .config-group:first-child {
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-border-light);
  width: 100%;
}

.pricing-box {
  flex: 1;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  padding-left: 60px;
}

.config-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.config-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-primary);
}

.config-hint {
  font-size: 12px;
  color: var(--color-text-muted);
  margin: 0;
}

.toggle-group {
  display: flex;
  background: var(--color-bg-tertiary);
  border-radius: 8px;
  padding: 4px;
}

.toggle-btn {
  padding: 10px 24px;
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border-radius: 6px;
  transition: all 0.15s ease;
}

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

.toggle-btn.active {
  background: white;
  color: var(--color-bg-primary);
}

.ip-slider {
  position: relative;
  width: 320px;
}

.ip-slider input[type="range"] {
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--color-bg-tertiary);
  appearance: none;
  cursor: pointer;
}

.ip-slider input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: white;
  cursor: pointer;
  border: 3px solid var(--color-primary);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.ip-slider input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: white;
  cursor: pointer;
  border: 3px solid var(--color-primary);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.ip-slider-ticks {
  display: flex;
  justify-content: space-between;
  margin-top: 12px;
  padding: 0 8px;
}

.ip-slider-ticks span {
  font-size: 12px;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color 0.15s ease;
}

.ip-slider-ticks span:hover {
  color: var(--color-text-primary);
}

.pricing-features {
  text-align: left;
  margin-bottom: 32px;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.pricing-features li svg {
  margin-top: 2px;
}

.pricing-features svg {
  color: var(--color-success);
  flex-shrink: 0;
}

.enterprise-cta {
  text-align: center;
  padding: 36px 32px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.enterprise-cta h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

.enterprise-cta p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

/* ===== FAQ Section ===== */
.faq {
  padding: 100px 0;
  background: var(--color-bg-primary);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.faq-item {
  padding: 28px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.faq-item h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.faq-item p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* ===== CTA Section ===== */
.cta {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.cta-content {
  text-align: center;
  color: white;
}

.cta h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 600;
  margin-bottom: 12px;
}

.cta p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 28px;
}

.cta .btn-primary,
.cta .btn-cta-light {
  background: white;
  color: var(--color-primary-dark);
}

.cta .btn-primary:hover,
.cta .btn-cta-light:hover {
  background: rgba(255, 255, 255, 0.9);
  color: var(--color-primary-dark);
}

/* ===== Footer ===== */
.footer {
  padding: 64px 0 40px;
  background: var(--color-bg-primary);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .logo {
  margin-bottom: 12px;
  gap: 8px;
  justify-content: center;
  align-items: center;
  width: fit-content;
  height: fit-content;
}

.footer-brand .logo a {
  height: 26px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-muted);
}

.footer-links h4 {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.footer-links a {
  display: block;
  font-size: 14px;
  color: var(--color-text-muted);
  padding: 6px 0;
  transition: color 0.15s ease;
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
}

/* Legal Pages */
.legal-page {
  padding: 120px 0 80px;
}

.legal-header {
  text-align: center;
  margin-bottom: 48px;
}

.legal-header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.legal-updated {
  font-size: 14px;
  color: var(--color-text-muted);
}

.legal-content {
  max-width: 720px;
  margin: 0 auto;
}

.legal-content section {
  margin-bottom: 40px;
}

.legal-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-light);
}

.legal-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 24px 0 12px;
}

.legal-content p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.legal-content ul {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 16px;
}

.legal-content li {
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 8px;
}

.legal-content a {
  color: var(--color-primary);
}

.legal-content a:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background: var(--color-bg-secondary);
    flex-direction: column;
    align-items: flex-start;
    padding: 72px 24px 24px;
    gap: 0;
    box-shadow: var(--shadow-xl);
    transition: right 0.25s ease;
  }

  .nav-links.active {
    right: 0;
  }

  .nav-links a {
    width: 100%;
    padding: 14px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .mobile-menu-btn {
    display: flex;
    z-index: 1001;
  }

  .mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero {
    padding: 130px 0 70px;
  }

  .hero-cta {
    flex-direction: column;
    gap: 10px;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .faq-grid {
    grid-template-columns: 1fr;
  }

  .pricing-layout {
    flex-direction: column;
  }

  .pricing-controls {
    order: -1;
    margin-bottom: 40px;
    padding-right: 0;
  }

  .pricing-box {
    padding-left: 0;
    justify-content: center;
  }

  .ip-slider {
    min-width: 280px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    text-align: center;
  }
}

@media (max-width: 480px) {
  .pricing-card {
    padding: 32px 24px;
    margin: 0 auto 40px;
  }

  .price-amount {
    font-size: 48px;
  }

  .feature-card {
    padding: 24px;
  }
}