/* ============================================================
   Auremont Intelligence — landing page styles
   Modern electric violet/indigo theme. Mobile-first.
   ============================================================ */

:root {
  --bg: #07070d;
  --bg-alt: #0b0b16;
  --surface: rgba(255, 255, 255, 0.03);
  --surface-2: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);

  --fg: #f5f5fb;
  --fg-muted: #a6a8bd;
  --fg-dim: #6f7189;

  --accent: #8b5cf6;        /* violet */
  --accent-2: #6366f1;      /* indigo */
  --accent-3: #38bdf8;      /* sky, for gradient pops */
  --accent-bright: #b79dff;
  --accent-soft: rgba(139, 92, 246, 0.16);

  --grad: linear-gradient(120deg, #a78bfa 0%, #818cf8 45%, #5eb3f6 100%);
  --grad-btn: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);

  --maxw: 1140px;
  --radius: 18px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-head: "Space Grotesk", "Inter", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 22px;
}

/* ---------- Typography ---------- */
h1,
h2,
h3 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.eyebrow {
  font-family: var(--font-sans);
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-bright);
  margin-bottom: 1rem;
}

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

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease), backdrop-filter 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(7, 7, 13, 0.72);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom-color: var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-head);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand-mark {
  color: var(--accent-bright);
  display: inline-flex;
  filter: drop-shadow(0 0 10px rgba(139, 92, 246, 0.5));
}

.brand-text {
  font-size: 1.08rem;
}

.brand-accent {
  color: var(--fg-muted);
  font-weight: 400;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  color: var(--fg-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s var(--ease);
}

.nav-link:hover {
  color: var(--fg);
}

.nav-cta {
  padding: 0.55rem 1.15rem;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s var(--ease);
}

.nav-cta:hover {
  border-color: transparent;
  background: var(--accent-soft);
  color: var(--accent-bright);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--fg);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.65rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
  will-change: transform;
}

.btn-primary {
  background: var(--grad-btn);
  color: #fff;
  box-shadow: 0 10px 34px -10px rgba(124, 92, 246, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 48px -12px rgba(124, 92, 246, 0.85), inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.btn-ghost {
  border-color: var(--border-strong);
  color: var(--fg);
  background: rgba(255, 255, 255, 0.02);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent-bright);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 1rem 2.1rem;
  font-size: 1.05rem;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: clamp(4rem, 12vw, 9rem) 0 clamp(3.5rem, 9vw, 6.5rem);
  overflow: hidden;
}

/* Aurora blobs */
.hero-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero-glow::before,
.hero-glow::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
}

.hero-glow::before {
  width: 520px;
  height: 520px;
  top: -160px;
  left: 50%;
  transform: translateX(-60%);
  background: radial-gradient(circle, #7c3aed, transparent 65%);
}

.hero-glow::after {
  width: 460px;
  height: 460px;
  top: -120px;
  left: 50%;
  transform: translateX(-10%);
  background: radial-gradient(circle, #2563eb, transparent 65%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 62px 62px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 28%, #000 15%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 28%, #000 15%, transparent 72%);
  opacity: 0.4;
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 840px;
}

.eyebrow-pill {
  border: 1px solid var(--border-strong);
  background: var(--surface);
  padding: 0.4rem 0.95rem;
  border-radius: 999px;
  margin-bottom: 1.6rem;
}

.hero-title {
  font-size: clamp(2.7rem, 8.2vw, 5.2rem);
  letter-spacing: -0.03em;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: clamp(1.05rem, 2.6vw, 1.32rem);
  color: var(--fg-muted);
  max-width: 620px;
  margin: 0 auto 2.4rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Sections ---------- */
.section {
  padding: clamp(4rem, 10vw, 7.5rem) 0;
}

.section-alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--border);
}

.section-head {
  max-width: 660px;
  margin-bottom: 3.2rem;
}

.section-head h2 {
  font-size: clamp(1.9rem, 5vw, 3rem);
}

/* ---------- Services grid ---------- */
.grid {
  display: grid;
  gap: 1.25rem;
}

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

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.8rem;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.3s var(--ease);
}

.card:hover {
  transform: translateY(-5px);
  border-color: rgba(139, 92, 246, 0.5);
  background: var(--surface-2);
  box-shadow: 0 24px 60px -30px rgba(124, 92, 246, 0.6);
}

.card-icon {
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.22), rgba(99, 102, 241, 0.08));
  border: 1px solid rgba(139, 92, 246, 0.28);
  color: var(--accent-bright);
  margin-bottom: 1.35rem;
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card h3 {
  font-size: 1.32rem;
  margin-bottom: 0.6rem;
}

.card p {
  color: var(--fg-muted);
  font-size: 0.98rem;
}

/* ---------- Steps ---------- */
.steps {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}

.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.9rem;
  position: relative;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.step:hover {
  border-color: rgba(139, 92, 246, 0.45);
  transform: translateY(-4px);
}

.step-num {
  font-family: var(--font-head);
  font-size: 1.7rem;
  font-weight: 700;
  display: block;
  margin-bottom: 0.7rem;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.step h3 {
  font-size: 1.22rem;
  margin-bottom: 0.4rem;
}

.step p {
  color: var(--fg-muted);
  font-size: 0.95rem;
}

/* ---------- Why ---------- */
.why-grid {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: 1fr;
}

.why-grid h2 {
  font-size: clamp(1.9rem, 5vw, 3rem);
  margin-bottom: 1rem;
}

.lead {
  color: var(--fg-muted);
  font-size: 1.12rem;
}

.why-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}

.why-list li {
  padding-left: 1.9rem;
  position: relative;
  color: var(--fg-muted);
}

.why-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--grad-btn);
  box-shadow: 0 0 12px rgba(139, 92, 246, 0.6);
}

.why-list strong {
  color: var(--fg);
  font-weight: 600;
}

/* ---------- CTA ---------- */
.cta-section {
  text-align: center;
}

.cta-inner {
  max-width: 640px;
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.12), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--border-strong);
  border-radius: 26px;
  padding: clamp(2.5rem, 7vw, 4.2rem) 1.8rem;
  position: relative;
  overflow: hidden;
}

.cta-inner::before {
  content: "";
  position: absolute;
  top: -60%;
  left: 50%;
  transform: translateX(-50%);
  width: 560px;
  height: 460px;
  background: radial-gradient(circle, rgba(124, 92, 246, 0.35), transparent 68%);
  pointer-events: none;
}

.cta-inner h2 {
  font-size: clamp(1.9rem, 5vw, 2.8rem);
  margin-bottom: 0.8rem;
  position: relative;
}

.cta-inner p {
  color: var(--fg-muted);
  margin-bottom: 2rem;
  position: relative;
}

.cta-inner .btn {
  position: relative;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.6rem 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  text-align: center;
}

.footer-meta {
  color: var(--fg-dim);
  font-size: 0.88rem;
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

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

/* ---------- Responsive ---------- */
@media (min-width: 640px) {
  .grid-services {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .grid-services {
    grid-template-columns: repeat(4, 1fr);
  }
  .steps {
    grid-template-columns: repeat(4, 1fr);
  }
  .why-grid {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
  }
}

/* ---------- Mobile nav ---------- */
@media (max-width: 820px) {
  .nav-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    inset: 74px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(11, 11, 22, 0.96);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem 22px 1.5rem;
    transform: translateY(-140%);
    transition: transform 0.4s var(--ease);
    box-shadow: 0 24px 44px -22px rgba(0, 0, 0, 0.9);
  }

  .nav.open {
    transform: translateY(0);
  }

  .nav-link,
  .nav-cta {
    padding: 1rem 0.4rem;
    border: none;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
    font-size: 1.05rem;
  }

  .nav-cta {
    color: var(--accent-bright);
    margin-top: 0.4rem;
    border-bottom: none;
  }
}