/* =========================================================
   Syvtech Labs — Design Tokens
========================================================= */
:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f6f8fb;
  --color-ink: #0b1220;
  --color-ink-soft: #4b5567;
  --color-border: #e6e9f0;

  --color-primary: #4f46e5;
  --color-primary-dark: #3730c4;
  --color-accent: #06b6d4;

  --color-dark: #0b1220;
  --color-dark-2: #101a30;

  --gradient-brand: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --shadow-sm: 0 2px 8px rgba(11, 18, 32, 0.06);
  --shadow-md: 0 10px 30px rgba(11, 18, 32, 0.08);
  --shadow-lg: 0 20px 50px rgba(11, 18, 32, 0.14);

  --container-w: 1180px;
  --transition: 220ms ease;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 .5em;
  letter-spacing: -0.02em;
}

p { margin: 0 0 1em; color: var(--color-ink-soft); }

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

img, svg { display: block; max-width: 100%; }

ul { padding: 0; margin: 0; list-style: none; }

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 10px 16px;
  z-index: 200;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* =========================================================
   Buttons
========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  padding: 12px 22px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 8px 20px rgba(79, 70, 229, 0.28);
}
.btn-primary:hover {
  box-shadow: 0 12px 28px rgba(79, 70, 229, 0.38);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-border);
}
.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.btn-sm { padding: 9px 16px; font-size: 0.88rem; }
.btn-lg { padding: 15px 28px; font-size: 1rem; }
.btn-block { width: 100%; }

/* =========================================================
   Header
========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-ink);
}
.logo-mark {
  display: inline-flex;
  color: var(--color-primary);
}
.logo-accent { color: var(--color-primary); }

.main-nav ul {
  display: flex;
  gap: 32px;
}
.nav-link {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-ink-soft);
  position: relative;
  padding: 6px 0;
  transition: color var(--transition);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--gradient-brand);
  transition: width var(--transition);
}
.nav-link:hover { color: var(--color-ink); }
.nav-link:hover::after { width: 100%; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 34px;
  height: 34px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =========================================================
   Hero
========================================================= */
.hero {
  position: relative;
  overflow: hidden;
  padding: 120px 0 100px;
  background: var(--color-dark);
  color: #fff;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 40%, transparent 90%);
}
.hero-glow {
  position: absolute;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.35;
}
.glow-1 { background: #4f46e5; top: -180px; left: -120px; }
.glow-2 { background: #06b6d4; bottom: -220px; right: -140px; }

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 780px;
}
.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 18px;
}
.hero .eyebrow { color: #7dd3e8; }

.hero-title {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  color: #fff;
  margin-bottom: 20px;
}
.hero-subtitle {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.75);
  max-width: 620px;
  margin: 0 auto 34px;
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}
.hero .btn-outline {
  color: #fff;
  border-color: rgba(255,255,255,0.25);
}
.hero .btn-outline:hover {
  border-color: #fff;
  color: #fff;
  background: rgba(255,255,255,0.08);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 34px;
}
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat-num {
  font-size: 1.7rem;
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.65); }

/* =========================================================
   Section shared
========================================================= */
section { padding: 96px 0; }
.section-head { text-align: center; max-width: 660px; margin: 0 auto 56px; }
.section-title { font-size: clamp(1.7rem, 3.5vw, 2.4rem); }
.section-subtitle { font-size: 1.05rem; }

/* =========================================================
   Services
========================================================= */
.services { background: var(--color-bg-alt); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.service-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--gradient-brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.service-icon svg { width: 26px; height: 26px; }
.service-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.service-card p { margin: 0; font-size: 0.95rem; }

/* =========================================================
   About
========================================================= */
.about-inner {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 64px;
  align-items: center;
}
.about-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.about-points { margin-top: 20px; display: flex; flex-direction: column; gap: 12px; }
.about-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  color: var(--color-ink);
}
.point-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(79, 70, 229, 0.12);
  color: var(--color-primary);
  font-size: 0.75rem;
  flex-shrink: 0;
}

.whitepaper-link {
  margin-top: 28px;
}

/* =========================================================
   Contact
========================================================= */
.contact { background: var(--color-bg-alt); }
.contact-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 40px;
  align-items: start;
}

.lead-form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
.form-group { display: flex; flex-direction: column; }
.form-group-full { grid-column: 1 / -1; }

label {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-ink);
}
.req { color: #e11d48; }

input, select, textarea {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: #fbfcfe;
  color: var(--color-ink);
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}
textarea { resize: vertical; min-height: 110px; }

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.12);
}

input.invalid, select.invalid, textarea.invalid {
  border-color: #e11d48;
}
input.invalid:focus, select.invalid:focus, textarea.invalid:focus {
  box-shadow: 0 0 0 4px rgba(225, 29, 72, 0.12);
}

.error-msg {
  display: block;
  min-height: 18px;
  font-size: 0.8rem;
  color: #e11d48;
  margin-top: 6px;
}

.form-status {
  margin-bottom: 18px;
  font-size: 0.92rem;
  border-radius: var(--radius-sm);
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition), padding var(--transition);
}
.form-status.success {
  max-height: 100px;
  padding: 14px 16px;
  background: rgba(16, 185, 129, 0.1);
  color: #067a55;
  border: 1px solid rgba(16, 185, 129, 0.25);
}
.form-status.error {
  max-height: 100px;
  padding: 14px 16px;
  background: rgba(225, 29, 72, 0.08);
  color: #b0123a;
  border: 1px solid rgba(225, 29, 72, 0.2);
}

.btn-spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  display: none;
  animation: spin 0.7s linear infinite;
}
#submit-btn.loading .btn-spinner { display: inline-block; }
#submit-btn.loading .btn-text { opacity: 0.85; }
@keyframes spin { to { transform: rotate(360deg); } }

.form-note {
  font-size: 0.78rem;
  color: var(--color-ink-soft);
  margin: 16px 0 0;
  text-align: center;
}

.contact-side {
  background: var(--color-dark);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  height: 100%;
}
.contact-side h3 { color: #fff; margin-bottom: 16px; }
.contact-side ul { display: flex; flex-direction: column; gap: 12px; margin-bottom: 28px; }
.contact-side li {
  font-size: 0.92rem;
  color: rgba(255,255,255,0.78);
  padding-left: 22px;
  position: relative;
}
.contact-side li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-brand);
}
.contact-side-info {
  border-top: 1px solid rgba(255,255,255,0.14);
  padding-top: 20px;
}
.contact-side-info p { color: rgba(255,255,255,0.85); font-size: 0.9rem; margin-bottom: 8px; }
.contact-side-info strong { color: #fff; }

/* =========================================================
   Footer
========================================================= */
.site-footer {
  background: var(--color-dark-2);
  color: rgba(255,255,255,0.7);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding: 64px 0 40px;
}
.footer-brand p { color: rgba(255,255,255,0.55); margin-top: 12px; font-size: 0.9rem; }
.footer-logo { color: #fff; }
.footer-logo .logo-accent { color: var(--color-accent); }

.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  margin-bottom: 18px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a, .footer-contact li {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.65);
  transition: color var(--transition);
}
.footer-col a:hover { color: #fff; }

.social-links { display: flex; gap: 10px; }
.social-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.social-icon:hover {
  background: var(--gradient-brand);
  border-color: transparent;
  transform: translateY(-2px);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
}
.footer-bottom p { margin: 0; font-size: 0.82rem; color: rgba(255,255,255,0.5); text-align: center; }

/* =========================================================
   Scroll reveal animations
========================================================= */
.fade-up, .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms ease, transform 700ms ease;
  transition-delay: var(--delay, 0s);
}
.fade-up.in-view, .reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .fade-up, .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html { scroll-behavior: auto; }
}

/* =========================================================
   Responsive
========================================================= */
@media (max-width: 992px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .about-inner { grid-template-columns: 1fr; }
  .about-media { max-width: 360px; margin: 0 auto; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  section { padding: 72px 0; }
  .hero { padding: 96px 0 64px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 26px; }

  .main-nav {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }
  .main-nav.open { max-height: 320px; }
  .main-nav ul { flex-direction: column; gap: 0; padding: 8px 24px 16px; }
  .main-nav li { border-bottom: 1px solid var(--color-border); }
  .main-nav a { display: block; padding: 14px 0; }
  .nav-toggle { display: flex; }
  .header-actions .btn-sm { display: none; }

  .services-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; padding: 48px 0 32px; }
}

@media (max-width: 480px) {
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .lead-form { padding: 24px; }
}