/* =========================================================================
   BLACK ATLAS — Global styles
   Implements the Style Guide from the Website SEO Buildout doc.
   ========================================================================= */

/* ---------- Design tokens ---------- */
:root {
  /* Primary */
  --color-black: #000000;
  --color-white: #FFFFFF;

  /* Accent */
  --color-indigo: #4B0082;
  --color-violet: #7B2FBE;
  --gradient-brand: linear-gradient(135deg, #4B0082 0%, #7B2FBE 100%);
  --gradient-brand-soft: linear-gradient(135deg, rgba(75, 0, 130, 0.85) 0%, rgba(123, 47, 190, 0.85) 100%);

  /* Neutrals */
  --color-gray-light: #F5F5F5;
  --color-black-soft: #1A1A1A;
  --color-gray-mid: #AAAAAA;
  --color-gray-dark: #666666;
  --color-border-light: rgba(0, 0, 0, 0.08);
  --color-border-dark: rgba(255, 255, 255, 0.10);

  /* Typography */
  --font-sans: 'Inter', 'Manrope', 'Space Grotesk', 'DM Sans', 'General Sans', system-ui, -apple-system, Segoe UI, sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Type scale (fluid) */
  --fs-h1: clamp(2.5rem, 4.2vw + 1rem, 4rem);       /* 40 → 64 */
  --fs-h2: clamp(1.75rem, 2.4vw + 1rem, 2.5rem);    /* 28 → 40 */
  --fs-h3: clamp(1.25rem, 1vw + 1rem, 1.75rem);     /* 20 → 28 */
  --fs-body: clamp(1rem, 0.3vw + 0.95rem, 1.125rem); /* 16 → 18 */
  --fs-lede: clamp(1.125rem, 0.5vw + 1rem, 1.375rem); /* 18 → 22 */
  --fs-kicker: 0.875rem;                             /* 14 */
  --fs-small: 0.875rem;

  /* Spacing */
  --space-section: clamp(4rem, 8vw, 7.5rem);  /* 64 → 120 */
  --space-block: clamp(2.5rem, 4vw, 4rem);
  --space-stack: 1.5rem;
  --space-inline: 1.5rem;

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 820px;

  /* Radii */
  --radius-card: 20px;
  --radius-pill: 100px;

  /* Shadows */
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
  --shadow-card-lift: 0 12px 40px rgba(0, 0, 0, 0.12);

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration: 300ms;
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--color-black);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration) var(--ease-out),
              opacity var(--duration) var(--ease-out);
}

a:hover { opacity: 0.75; }

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); line-height: 1.2; letter-spacing: -0.015em; }
h4 { font-size: 1.125rem; letter-spacing: -0.01em; }

p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }

ul { margin: 0; padding: 0; }

/* ---------- Layout primitives ---------- */
.wrap {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.wrap--narrow { max-width: var(--max-width-narrow); }

section { padding: var(--space-section) 0; }

.section-dark {
  background: var(--color-black);
  color: var(--color-white);
}

.section-soft {
  background: var(--color-gray-light);
  color: var(--color-black);
}

.section-accent {
  position: relative;
  background: var(--color-black);
  color: var(--color-white);
  overflow: hidden;
}

.section-accent::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(800px 400px at 80% 10%, rgba(123, 47, 190, 0.35), transparent 60%),
    radial-gradient(700px 500px at 10% 90%, rgba(75, 0, 130, 0.45), transparent 60%);
  pointer-events: none;
  animation: drift 18s ease-in-out infinite alternate;
}

.section-accent > * { position: relative; z-index: 1; }

@keyframes drift {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(0, -20px, 0); }
}

/* ---------- Typography helpers ---------- */
.kicker {
  display: inline-block;
  font-size: var(--fs-kicker);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gray-dark);
  margin-bottom: 1rem;
}

.section-dark .kicker,
.section-accent .kicker { color: var(--color-gray-mid); }

.lede {
  font-size: var(--fs-lede);
  line-height: 1.5;
  max-width: 65ch;
  color: var(--color-black);
}

.section-dark .lede,
.section-accent .lede { color: rgba(255, 255, 255, 0.88); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-violet);
}

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--color-border-dark);
  color: var(--color-white);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-white);
  font-weight: 800;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.brand svg { width: 32px; height: 32px; }

.brand-logo {
  display: block;
  height: 32px;
  width: auto;
  max-width: none;
}

.site-footer .brand-logo { height: 40px; }

.brand-word { font-size: 1.125rem; }

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

.nav ul {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav a:hover { color: var(--color-white); opacity: 1; }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  color: var(--color-white);
  cursor: pointer;
  padding: 0.5rem;
}

@media (max-width: 860px) {
  .site-header .wrap { padding-top: 1.25rem; padding-bottom: 1.25rem; }
  .brand-logo { height: 56px; }
  .site-footer .brand-logo { height: 56px; }
  .nav ul { display: none; }
  .nav-toggle { display: inline-flex; }
  .site-header .wrap.is-open .nav ul {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 1rem 1.5rem 1.5rem;
    background: var(--color-black);
    border-bottom: 1px solid var(--color-border-dark);
  }
  .site-header .wrap.is-open .nav ul li { padding: 0.625rem 0; width: 100%; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  cursor: pointer;
  border: 1.5px solid transparent;
  transition:
    transform var(--duration) var(--ease-out),
    box-shadow var(--duration) var(--ease-out),
    background-color var(--duration) var(--ease-out),
    color var(--duration) var(--ease-out),
    border-color var(--duration) var(--ease-out);
}

.btn:hover {
  transform: scale(1.02);
  opacity: 1;
}

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

.btn-primary:hover {
  box-shadow: 0 10px 30px rgba(123, 47, 190, 0.35);
}

.btn-secondary {
  background: transparent;
  color: currentColor;
  border-color: currentColor;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
}

.section-soft .btn-primary,
body > main > section:not(.section-dark):not(.section-accent) .btn-primary {
  background: var(--color-black);
  color: var(--color-white);
}

.section-soft .btn-primary:hover,
body > main > section:not(.section-dark):not(.section-accent) .btn-primary:hover {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: clamp(6rem, 10vw, 9rem) 0 clamp(4rem, 8vw, 7rem);
  background: var(--color-black);
  color: var(--color-white);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(1200px 600px at 85% 0%, rgba(123, 47, 190, 0.30), transparent 60%),
    radial-gradient(800px 500px at 0% 100%, rgba(75, 0, 130, 0.35), transparent 60%);
  animation: drift 22s ease-in-out infinite alternate;
  pointer-events: none;
}

.hero .wrap { position: relative; z-index: 1; max-width: 960px; }

.hero h1 {
  font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
  margin-bottom: 1.25rem;
}

.hero .lede {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 2rem;
}

.hero-cta { margin-top: 2rem; }

/* ---------- Cards & grids ---------- */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }

@media (min-width: 720px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.card {
  padding: clamp(1.75rem, 3vw, 2.5rem);
  border-radius: var(--radius-card);
  background: var(--color-white);
  color: var(--color-black);
  box-shadow: var(--shadow-card);
  transition: transform var(--duration) var(--ease-out),
              box-shadow var(--duration) var(--ease-out);
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-lift);
}

.card h3 { margin-bottom: 0.75rem; }

.card-dark {
  background: var(--color-black-soft);
  color: var(--color-white);
  box-shadow: none;
  border: 1px solid var(--color-border-dark);
}

.card-dark:hover {
  box-shadow: 0 12px 40px rgba(123, 47, 190, 0.18);
  border-color: rgba(123, 47, 190, 0.5);
}

.card-gradient {
  background: var(--gradient-brand);
  color: var(--color-white);
  box-shadow: 0 20px 60px rgba(75, 0, 130, 0.35);
  border: 0;
}

.card-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  background: var(--gradient-brand);
  color: var(--color-white);
  font-weight: 700;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}

/* Alternating card rhythm: every even card in a grid goes dark on light sections */
.cards-alt .card:nth-child(2n) {
  background: var(--color-black);
  color: var(--color-white);
  border-color: transparent;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
}

.cards-alt .card:nth-child(2n):hover {
  box-shadow: 0 20px 60px rgba(123, 47, 190, 0.25);
}

/* ---------- Stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.5rem;
}

.stat {
  padding: 1.5rem;
  border-left: 2px solid var(--color-violet);
}

.stat-value {
  font-size: clamp(2.25rem, 3.5vw + 1rem, 3.5rem);
  font-family: var(--font-sans);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
          background-clip: text;
  color: transparent;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: var(--fs-kicker);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gray-mid);
}

/* ---------- Feature list (bullet list with bold lead-ins) ---------- */
.feature-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem 2rem;
}

.feature-list li {
  padding-left: 1.25rem;
  border-left: 2px solid var(--color-violet);
}

.feature-list strong {
  display: block;
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
  margin-bottom: 0.35rem;
}

.feature-list p { color: inherit; opacity: 0.85; margin: 0; }

/* ---------- Query bubbles (industry pages) ---------- */
.queries {
  display: grid;
  gap: 0.875rem;
  max-width: 720px;
}

.query {
  position: relative;
  padding: 1rem 1.25rem;
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: 18px 18px 18px 4px;
  font-style: italic;
  font-size: 1.05rem;
  box-shadow: var(--shadow-card);
}

.section-dark .query,
.section-accent .query {
  background: var(--color-black-soft);
  border-color: var(--color-border-dark);
  color: var(--color-white);
  box-shadow: none;
}

.query:nth-child(even) {
  border-radius: 18px 18px 4px 18px;
  margin-left: auto;
  max-width: 90%;
}

/* ---------- Q&A accordion ---------- */
.faq {
  display: grid;
  gap: 0;
  max-width: var(--max-width-narrow);
  margin: 0 auto;
}

.faq details {
  border-bottom: 1px solid var(--color-border-light);
  padding: 1.25rem 0;
}

.section-dark .faq details,
.section-accent .faq details {
  border-bottom-color: var(--color-border-dark);
}

.faq details:first-of-type { border-top: 1px solid var(--color-border-light); }
.section-dark .faq details:first-of-type,
.section-accent .faq details:first-of-type { border-top-color: var(--color-border-dark); }

.faq summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  cursor: pointer;
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
  list-style: none;
  padding: 0.25rem 0;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-violet);
  transition: transform var(--duration) var(--ease-out);
  flex-shrink: 0;
}

.faq details[open] summary::after {
  content: "×";
  transform: rotate(0deg);
}

.faq .faq-body {
  padding-top: 1rem;
  color: var(--color-gray-dark);
  font-size: 1.0625rem;
}

.section-dark .faq .faq-body,
.section-accent .faq .faq-body {
  color: rgba(255, 255, 255, 0.8);
}

/* ---------- CTA band ---------- */
.cta-band {
  padding: var(--space-section) 0;
  text-align: center;
  background: var(--color-black);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(1000px 500px at 50% 120%, rgba(123, 47, 190, 0.55), transparent 60%),
    radial-gradient(700px 400px at 90% -10%, rgba(75, 0, 130, 0.4), transparent 60%);
  animation: drift 20s ease-in-out infinite alternate;
  pointer-events: none;
}

.cta-band > * { position: relative; z-index: 1; }

.cta-band h2 { margin-bottom: 1rem; }

.cta-band .lede {
  color: rgba(255, 255, 255, 0.85);
  margin: 0 auto 2rem;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-black);
  color: var(--color-white);
  padding: clamp(3rem, 6vw, 5rem) 0 2rem;
  border-top: 1px solid var(--color-border-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr 1fr 1.25fr;
  gap: 2.5rem;
}

@media (max-width: 780px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 460px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-grid h4 {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-mid);
  margin-bottom: 1rem;
  font-weight: 600;
}

.footer-links ul { list-style: none; display: grid; gap: 0.625rem; }

.footer-links a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.95rem;
}

.footer-links a:hover { color: var(--color-white); opacity: 1; }

.newsletter input[type="email"] {
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--color-black-soft);
  color: var(--color-white);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

.newsletter input[type="email"]:focus {
  outline: 2px solid var(--color-violet);
  outline-offset: 2px;
}

.newsletter label {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.4;
}

.newsletter button {
  margin-top: 0.5rem;
  width: 100%;
}

.footer-contact p { margin: 0 0 0.5rem; color: rgba(255, 255, 255, 0.8); }

.footer-bottom {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border-dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.55);
}

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translate3d(0, 24px, 0);
  transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- Platform strip (monitoring) ---------- */
.platform-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 2rem 3rem;
  padding: 2rem 0;
}

.platform-strip span {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  opacity: 0.9;
}

/* ---------- Steps callout (4-col) ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  counter-reset: step;
}

.step {
  padding: 1.75rem;
  background: var(--color-black-soft);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-card);
  position: relative;
}

.section-soft .step,
body > main > section:not(.section-dark):not(.section-accent) .step {
  background: var(--color-white);
  border-color: var(--color-border-light);
  box-shadow: var(--shadow-card);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--color-violet);
  margin-bottom: 0.75rem;
  display: block;
}

.step h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }

.step p { margin: 0; opacity: 0.85; font-size: 0.975rem; }

/* ---------- Two-column content ---------- */
.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

@media (max-width: 780px) {
  .two-col { grid-template-columns: 1fr; }
}

/* ---------- Util ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-sm { margin-top: 1rem; }
.mt-md { margin-top: 2rem; }
.mt-lg { margin-top: 3rem; }
.mx-auto { margin-left: auto; margin-right: auto; }