/* ============================================
   Rhythmics Technology - Global Stylesheet
   Dark mode · Modern · Trend-led
   ============================================ */

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

:root {
  --color-bg: #0a0e1a;
  --color-bg-alt: #141925;
  --color-bg-card: #1a2032;
  --color-line: #2a3142;
  --color-line-bright: #3d4660;
  --color-ink: #f0f4ff;
  --color-ink-soft: #a8b0c5;
  --color-ink-faint: #6b7390;

  --color-accent: #7c5cfc;
  --color-accent-bright: #9d83ff;
  --color-accent-2: #4a8fe7;
  --gradient-accent: linear-gradient(135deg, #7c5cfc 0%, #4a8fe7 100%);
  --gradient-text: linear-gradient(135deg, #9d83ff 0%, #6ba9f5 100%);
  --gradient-bg: linear-gradient(180deg, rgba(124, 92, 252, 0.04) 0%, transparent 100%);

  --font-display: 'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  --container: 1200px;
  --container-narrow: 880px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

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

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

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-ink);
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
}

h3 {
  font-size: clamp(1.3rem, 2.2vw, 1.65rem);
  font-weight: 600;
}

h4 {
  font-weight: 600;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
}

p {
  color: var(--color-ink-soft);
  line-height: 1.7;
}

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

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-accent-bright);
  margin-bottom: 1.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--color-accent);
}

.lead {
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--color-ink-soft);
  max-width: 640px;
}

/* ============================================
   Layout
   ============================================ */

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 2rem;
}

.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 6rem 0;
  position: relative;
}

/* ============================================
   Header / Navigation
   ============================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 2rem;
  max-width: var(--container);
  margin: 0 auto;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: white;
  box-shadow: 0 4px 16px rgba(124, 92, 252, 0.4);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  list-style: none;
}

.nav-menu a {
  font-size: 0.92rem;
  color: var(--color-ink-soft);
  font-weight: 500;
}

.nav-menu a.active {
  color: var(--color-ink);
}

.nav-menu a:hover {
  color: var(--color-ink);
}

.nav-cta {
  font-size: 0.9rem;
  padding: 0.6rem 1.2rem;
  background: var(--gradient-accent);
  color: white !important;
  border-radius: 8px;
  font-weight: 500;
  box-shadow: 0 4px 16px rgba(124, 92, 252, 0.3);
  transition: transform 0.2s ease, box-shadow 0.2s ease !important;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(124, 92, 252, 0.5);
  color: white !important;
}

@media (max-width: 768px) {
  .nav-menu {
    gap: 1.2rem;
  }
  .nav-menu li:not(:last-child):not(.always-show) {
    display: none;
  }
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.7rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-accent);
  color: white;
  box-shadow: 0 4px 20px rgba(124, 92, 252, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(124, 92, 252, 0.5);
  color: white;
}

.btn-secondary {
  border-color: var(--color-line-bright);
  color: var(--color-ink);
  background: rgba(255, 255, 255, 0.02);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  background: rgba(124, 92, 252, 0.08);
  color: var(--color-ink);
}

/* ============================================
   Hero
   ============================================ */

.hero {
  padding: 7rem 0 6rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(124, 92, 252, 0.15) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1.3fr 1fr;
    gap: 5rem;
  }
}

.hero-headline {
  margin-bottom: 1.5rem;
}

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

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.25rem;
}

.hero-visual {
  position: relative;
  padding: 1.75rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-line);
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--color-ink-soft);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.hero-visual::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 12px 12px 0 0;
}

.hero-visual-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-ink-faint);
}

.hero-visual-label::before {
  content: '';
  width: 8px;
  height: 8px;
  background: #4ade80;
  border-radius: 50%;
  box-shadow: 0 0 8px #4ade80;
}

.metric-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.65rem 0;
  border-bottom: 1px dashed var(--color-line);
}

.metric-row:last-child {
  border-bottom: 0;
}

.metric-row .key {
  color: var(--color-ink-faint);
  font-size: 0.78rem;
}

.metric-row .val {
  color: var(--color-ink);
  font-weight: 500;
  font-size: 0.85rem;
}

/* ============================================
   Trust strip
   ============================================ */

.trust-strip {
  padding: 2.25rem 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background: var(--color-bg-alt);
}

.trust-items {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 2rem 3.5rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-ink-faint);
}

.trust-items span {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.trust-items span::before {
  content: '';
  width: 4px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* ============================================
   Capabilities cards
   ============================================ */

.section-heading {
  max-width: 720px;
  margin-bottom: 4rem;
}

.capabilities-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .capabilities-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.cap-card {
  padding: 2.5rem 2rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-line);
  border-radius: 12px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.cap-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.cap-card:hover {
  border-color: var(--color-line-bright);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.cap-card:hover::before {
  opacity: 1;
}

.cap-card .index {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-accent-bright);
  margin-bottom: 2rem;
  display: block;
}

.cap-card h3 {
  margin-bottom: 1rem;
}

.cap-card p {
  font-size: 0.95rem;
}

/* ============================================
   Two column section
   ============================================ */

.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

@media (min-width: 900px) {
  .two-col {
    grid-template-columns: 1fr 1.5fr;
    gap: 5rem;
  }
}

.two-col-sticky h2 {
  position: sticky;
  top: 100px;
}

/* ============================================
   Services section
   ============================================ */

.service-block {
  padding: 3rem 0;
  border-top: 1px solid var(--color-line);
}

.service-block:last-child {
  border-bottom: 1px solid var(--color-line);
}

.service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
}

@media (min-width: 768px) {
  .service-grid {
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
  }
}

.service-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-ink-faint);
  letter-spacing: 0.1em;
}

.service-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  margin-top: 0.5rem;
  color: var(--color-ink);
  letter-spacing: -0.02em;
}

.service-list {
  list-style: none;
  margin-top: 1.5rem;
}

.service-list li {
  padding: 0.7rem 0;
  padding-left: 1.8rem;
  position: relative;
  color: var(--color-ink-soft);
  border-bottom: 1px dashed var(--color-line);
}

.service-list li::before {
  content: '◆';
  position: absolute;
  left: 0;
  color: var(--color-accent-bright);
  font-size: 0.8rem;
  top: 0.95rem;
}

/* ============================================
   Technology section
   ============================================ */

.tech-section {
  background: var(--color-bg-alt);
  position: relative;
}

.tech-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(74, 143, 231, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.tech-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-line);
  border-radius: 16px;
  padding: 3rem;
  margin-top: 2rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
}

.tech-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
}

@media (max-width: 768px) {
  .tech-card {
    padding: 2rem 1.5rem;
  }
}

.tech-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2.5rem;
}

@media (min-width: 768px) {
  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem 3rem;
  }
}

.tech-item h4 {
  margin-bottom: 0.6rem;
  color: var(--color-accent-bright);
}

.tech-item p {
  font-size: 0.95rem;
}

.callout {
  margin-top: 2.5rem;
  padding: 1.5rem 1.75rem;
  border-left: 3px solid var(--color-accent);
  background: rgba(124, 92, 252, 0.06);
  border-radius: 0 8px 8px 0;
  font-size: 0.95rem;
  color: var(--color-ink-soft);
}

.callout strong {
  color: var(--color-ink);
}

/* ============================================
   Page Hero
   ============================================ */

.page-hero {
  padding: 6rem 0 4rem;
  border-bottom: 1px solid var(--color-line);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124, 92, 252, 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.page-hero > .container {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  max-width: 900px;
  margin-bottom: 2rem;
}

.page-hero .lead {
  max-width: 700px;
}

/* ============================================
   Stats
   ============================================ */

.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 4rem;
}

@media (min-width: 768px) {
  .stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 3rem;
  }
}

.stat .num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 0.6rem;
  letter-spacing: -0.02em;
}

.stat .label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-ink-faint);
}

/* ============================================
   Contact
   ============================================ */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
}

@media (min-width: 900px) {
  .contact-grid {
    grid-template-columns: 1fr 1.4fr;
  }
}

.contact-info-block {
  margin-bottom: 2rem;
}

.contact-info-block h4 {
  color: var(--color-accent-bright);
  margin-bottom: 0.5rem;
}

.contact-info-block p,
.contact-info-block a {
  font-size: 1rem;
  color: var(--color-ink);
}

.contact-info-block a {
  border-bottom: 1px solid var(--color-line-bright);
  transition: border-color 0.2s ease;
}

.contact-info-block a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-bright);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-ink-faint);
  margin-bottom: 0.6rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--font-body);
  font-size: 1rem;
  border: 1px solid var(--color-line);
  background: var(--color-bg-card);
  color: var(--color-ink);
  border-radius: 8px;
  transition: all 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-bg-card);
  box-shadow: 0 0 0 3px rgba(124, 92, 252, 0.15);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

/* ============================================
   Footer
   ============================================ */

.footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-line);
  color: var(--color-ink-soft);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

.footer-brand h3 {
  color: var(--color-ink);
  margin-bottom: 1rem;
  font-weight: 700;
}

.footer-brand p {
  color: var(--color-ink-faint);
  font-size: 0.92rem;
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h5 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-ink-faint);
  margin-bottom: 1.25rem;
}

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

.footer-col li {
  margin-bottom: 0.6rem;
}

.footer-col a {
  color: var(--color-ink-soft);
  font-size: 0.95rem;
}

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

.footer-bottom {
  border-top: 1px solid var(--color-line);
  padding-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-ink-faint);
}

/* ============================================
   Legal pages
   ============================================ */

.legal-doc {
  padding: 5rem 0 6rem;
}

.legal-doc h1 {
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.legal-doc .updated {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-ink-faint);
  margin-bottom: 3rem;
  display: block;
}

.legal-doc h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 3rem 0 1rem;
  color: var(--color-ink);
}

.legal-doc h2:first-of-type {
  margin-top: 0;
}

.legal-doc p {
  margin-bottom: 1rem;
  color: var(--color-ink-soft);
  line-height: 1.75;
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-up {
  animation: fadeUp 0.8s ease forwards;
}

.fade-up-delay-1 {
  animation: fadeUp 0.8s ease 0.1s forwards;
  opacity: 0;
}

.fade-up-delay-2 {
  animation: fadeUp 0.8s ease 0.2s forwards;
  opacity: 0;
}

.fade-up-delay-3 {
  animation: fadeUp 0.8s ease 0.3s forwards;
  opacity: 0;
}