/* =========================================================
   NovaAI — Custom Stylesheet
   Design tokens, layout, components, animations, responsive
   ========================================================= */

:root {
  --color-primary: #0F62FE;
  --color-secondary: #00B4D8;
  --color-accent: #1E293B;
  --color-bg: #F8FAFC;
  --color-white: #FFFFFF;
  --color-text: #334155;
  --color-text-muted: #64748B;
  --color-border: #E2E8F0;

  --gradient-brand: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  --gradient-brand-soft: linear-gradient(135deg, rgba(15,98,254,0.08) 0%, rgba(0,180,216,0.08) 100%);

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 48px rgba(15, 23, 42, 0.12);
  --shadow-brand: 0 12px 32px rgba(15, 98, 254, 0.25);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;

  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;

  --nav-height: 78px;
}

/* ===== Base ===== */
* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-accent);
  font-weight: 700;
  line-height: 1.25;
}

a { text-decoration: none; color: inherit; transition: color .25s ease; }
img { max-width: 100%; height: auto; display: block; }

.fw-700 { font-weight: 700; }
.fw-600 { font-weight: 600; }

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 10px 16px;
  z-index: 2000;
  border-radius: 0 0 8px 0;
}
.skip-link:focus {
  left: 0;
}

.section-padding { padding: 100px 0; }
.section-alt { background: linear-gradient(180deg, #F1F5FE 0%, #F8FAFC 100%); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: .82rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: .75rem;
  position: relative;
  padding-left: 28px;
}
.eyebrow::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 3px;
  border-radius: 2px;
  background: var(--gradient-brand);
}

.section-title {
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  margin-bottom: 1.1rem;
}

.lead-text {
  font-size: 1.1rem;
  color: var(--color-text-muted);
}

.small-text { font-size: .95rem; color: var(--color-text-muted); }

/* ===== Buttons ===== */
.btn { font-family: var(--font-heading); font-weight: 600; letter-spacing: .01em; }

.btn-primary-gradient {
  background: var(--gradient-brand);
  border: none;
  color: #fff;
  box-shadow: var(--shadow-brand);
  transition: transform .3s ease, box-shadow .3s ease, filter .3s ease;
}
.btn-primary-gradient:hover,
.btn-primary-gradient:focus {
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 18px 40px rgba(15, 98, 254, 0.35);
  filter: brightness(1.05);
}

.btn-outline-brand {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  transition: all .3s ease;
}
.btn-outline-brand:hover,
.btn-outline-brand:focus {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-3px);
}

/* ===== Navigation ===== */
#mainNav {
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(248, 250, 252, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: box-shadow .3s ease, background .3s ease;
  border-bottom: 1px solid transparent;
}
#mainNav.scrolled {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--color-border);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--color-accent);
}
.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--gradient-brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: var(--shadow-brand);
}

.nav-link {
  font-weight: 500;
  color: var(--color-accent);
  padding: .5rem 1rem !important;
  position: relative;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: .2rem;
  height: 2px;
  background: var(--gradient-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s ease;
}
.nav-link:hover::after,
.nav-link.active::after { transform: scaleX(1); }
.nav-link:hover, .nav-link.active { color: var(--color-primary); }

/* ===== Hero ===== */
.hero-section {
  position: relative;
  padding-top: calc(var(--nav-height) + 80px);
  padding-bottom: 100px;
  overflow: hidden;
  background: linear-gradient(180deg, #FFFFFF 0%, #F1F5FE 100%);
}

.hero-bg-anim {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(15,98,254,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15,98,254,.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 75%);
}
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: .35;
  animation: float 14s ease-in-out infinite;
}
.blob-1 {
  width: 420px; height: 420px;
  background: var(--color-primary);
  top: -120px; left: -100px;
  animation-delay: 0s;
}
.blob-2 {
  width: 360px; height: 360px;
  background: var(--color-secondary);
  bottom: -140px; right: -80px;
  animation-delay: -4s;
}
.blob-3 {
  width: 260px; height: 260px;
  background: #7DD3FC;
  top: 40%; right: 20%;
  animation-delay: -8s;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.08); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}
@media (prefers-reduced-motion: reduce) {
  .blob { animation: none; }
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  background: var(--gradient-brand-soft);
  color: var(--color-primary);
  border: 1px solid rgba(15,98,254,.18);
  padding: .5rem 1.1rem;
  border-radius: 999px;
  font-size: .85rem;
  font-weight: 600;
}

.hero-title {
  font-size: clamp(2.2rem, 4.2vw, 3.4rem);
  margin-bottom: 1.25rem;
}
.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 560px;
}

.hero-mini-stats div {
  display: flex;
  flex-direction: column;
}
.hero-mini-stats strong {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-accent);
}
.hero-mini-stats span {
  font-size: .85rem;
  color: var(--color-text-muted);
}

.hero-image-wrap {
  position: relative;
  animation: floatSlow 6s ease-in-out infinite;
}
@keyframes floatSlow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}
@media (prefers-reduced-motion: reduce) {
  .hero-image-wrap { animation: none; }
}

.scroll-indicator {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: bounce 2s infinite;
  box-shadow: var(--shadow-sm);
  z-index: 2;
}
@keyframes bounce {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 8px); }
}

/* ===== Glass / Feature / Service Cards ===== */
.glass-card {
  background: rgba(255,255,255,.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,.6);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  transition: transform .35s ease, box-shadow .35s ease;
}
.glass-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.icon-circle {
  width: 56px;
  height: 56px;
  min-width: 56px;
  border-radius: 16px;
  background: var(--gradient-brand-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  transition: background .3s ease, color .3s ease, transform .3s ease;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.feature-card:hover .icon-circle {
  background: var(--gradient-brand);
  color: #fff;
  transform: rotate(-6deg) scale(1.05);
}
.feature-card h3 { margin: 1.1rem 0 .5rem; }

.service-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2.2rem 2rem;
  position: relative;
  overflow: hidden;
  transition: transform .35s ease, box-shadow .35s ease;
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--gradient-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}
.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}
.service-card:hover::before { transform: scaleX(1); }

.service-icon {
  width: 60px;
  height: 60px;
  border-radius: 18px;
  background: var(--gradient-brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-brand);
  transition: transform .35s ease;
}
.service-card:hover .service-icon { transform: scale(1.08) rotate(4deg); }

.service-card h3 { margin-bottom: .9rem; }

.service-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.service-list li {
  position: relative;
  padding-left: 22px;
  margin-bottom: .55rem;
  color: var(--color-text-muted);
  font-size: .95rem;
}
.service-list li::before {
  content: "\f00c";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  left: 0;
  top: 2px;
  font-size: .72rem;
  color: var(--color-secondary);
}

.services-note {
  background: var(--gradient-brand-soft);
  border-radius: var(--radius-md);
  padding: 2.2rem;
  border: 1px solid rgba(15,98,254,.1);
}
.services-note p {
  color: var(--color-text-muted);
  margin-bottom: .9rem;
}
.services-note p:last-child { margin-bottom: 0; }

/* ===== Stats Section ===== */
.stats-section {
  background: var(--gradient-brand);
  padding: 70px 0;
  position: relative;
}
.stat-item { display: flex; flex-direction: column; align-items: center; color: #fff; }
.stat-number {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(2.2rem, 4vw, 3rem);
  line-height: 1;
}
.stat-label {
  margin-top: .5rem;
  font-size: .95rem;
  letter-spacing: .03em;
  opacity: .9;
}

/* ===== CTA ===== */
.cta-section { padding: 30px 0 100px; }
.cta-box {
  background: var(--color-accent);
  background-image: radial-gradient(circle at 20% 20%, rgba(15,98,254,.35), transparent 45%),
                     radial-gradient(circle at 80% 80%, rgba(0,180,216,.35), transparent 45%);
  border-radius: var(--radius-lg);
  padding: 4rem 2rem;
  text-align: center;
  color: #fff;
}
.cta-box h2 {
  color: #fff;
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  margin-bottom: .75rem;
}
.cta-box p {
  color: #CBD5E1;
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

/* ===== Contact ===== */
.contact-info-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  height: 100%;
  box-shadow: var(--shadow-sm);
}
.contact-info-item {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}
.contact-info-item:last-child { border-bottom: none; padding-bottom: 0; }
.contact-info-item:first-child { padding-top: 0; }
.contact-info-item a { color: var(--color-primary); font-weight: 500; }
.contact-info-item a:hover { color: var(--color-secondary); }
.contact-info-item address { font-style: normal; color: var(--color-text-muted); }

.contact-form {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2.2rem;
  box-shadow: var(--shadow-sm);
}
.form-label { font-weight: 600; color: var(--color-accent); font-size: .92rem; }
.req { color: #EF4444; margin-left: 2px; }
.form-control {
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  padding: .65rem .9rem;
}
.form-control:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(15,98,254,.12);
}

.captcha-box {
  display: flex;
  align-items: center;
  gap: .75rem;
  background: var(--gradient-brand-soft);
  border: 1px dashed rgba(15,98,254,.3);
  border-radius: var(--radius-sm);
  padding: .75rem 1rem;
}
.captcha-question {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: .03em;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-accent);
  color: #CBD5E1;
  padding-top: 70px;
}
.site-footer .navbar-brand { color: #fff; }
.footer-tagline { margin: 1rem 0 1.25rem; color: #94A3B8; }
.footer-heading {
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
}
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: .75rem; }
.footer-links a { color: #94A3B8; font-size: .95rem; }
.footer-links a:hover { color: var(--color-secondary); }

.social-icons { display: flex; gap: .75rem; }
.social-icons a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  transition: background .3s ease, transform .3s ease;
}
.social-icons a:hover {
  background: var(--gradient-brand);
  transform: translateY(-3px);
}

.footer-divider { border-color: rgba(255,255,255,.1); margin-top: 2.5rem; }
.copyright-text { color: #94A3B8; font-size: .88rem; }

/* ===== Back to top ===== */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: #fff;
  border: none;
  box-shadow: var(--shadow-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all .35s ease;
  z-index: 999;
}
.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover { filter: brightness(1.08); transform: translateY(-4px); }

/* ===== Scroll Reveal ===== */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s ease, transform .7s ease;
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ===== Responsive ===== */
@media (max-width: 991.98px) {
  .section-padding { padding: 70px 0; }
  .hero-section { padding-top: calc(var(--nav-height) + 40px); padding-bottom: 60px; text-align: left; }
  #navMenu {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 1.25rem;
    margin-top: 1rem;
    box-shadow: var(--shadow-md);
  }
  .nav-link::after { display: none; }
}

@media (max-width: 575.98px) {
  .cta-box { padding: 2.5rem 1.5rem; }
  .stats-section { padding: 50px 0; }
  .contact-form, .contact-info-card { padding: 1.5rem; }
}