/* Filename: site.css
 * Purpose: Retail marketing styles for Infinitum System Optimizer (Firebase Hosting).
 * Author: Kevin Doyle Jr. / Infinitum Imagery LLC
 * Last Modified: 2026-09-10
 * Dependencies: Google Fonts (Syne, Manrope) linked from HTML pages
 * Platform Compatibility: Modern evergreen browsers
 */

:root {
  --iso-bg: #05070b;
  --iso-ink: #f4f8fb;
  --iso-muted: #9eb0c0;
  --iso-cyan: #22d3ee;
  --iso-cyan-deep: #0891b2;
  --iso-line: rgba(255, 255, 255, 0.1);
  --iso-panel: rgba(255, 255, 255, 0.03);
  --iso-max: 1120px;
  --iso-font-display: "Syne", sans-serif;
  --iso-font-body: "Manrope", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--iso-ink);
  font-family: var(--iso-font-body);
  background:
    radial-gradient(1200px 700px at 82% -8%, rgba(34, 211, 238, 0.18), transparent 55%),
    radial-gradient(900px 560px at -12% 18%, rgba(8, 145, 178, 0.12), transparent 52%),
    linear-gradient(180deg, #070b11 0%, var(--iso-bg) 42%, #04060a 100%);
  line-height: 1.55;
}

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

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

.iso-skip {
  position: absolute;
  left: -999px;
  top: 0;
}

.iso-skip:focus {
  left: 12px;
  top: 12px;
  z-index: 50;
  background: var(--iso-cyan);
  color: #042f2e;
  padding: 8px 12px;
  border-radius: 8px;
}

.iso-shell {
  width: min(100% - 2rem, var(--iso-max));
  margin-inline: auto;
}

.iso-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 0;
  position: relative;
  z-index: 5;
}

.iso-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--iso-font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.iso-brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.iso-nav-links {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  color: var(--iso-muted);
  font-size: 0.95rem;
}

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

.iso-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 48px;
  padding: 0.8rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 0.98rem;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease, opacity 180ms ease;
}

.iso-btn:hover {
  transform: translateY(-1px);
}

.iso-btn-primary {
  background: linear-gradient(135deg, var(--iso-cyan), var(--iso-cyan-deep));
  color: #04151a;
}

.iso-btn-ghost {
  border-color: var(--iso-line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--iso-ink);
}

.iso-brand-kicker {
  margin: 0 0 0.75rem;
  font-family: var(--iso-font-display);
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--iso-cyan);
  animation: isoRise 650ms ease both;
}

.iso-hero {
  position: relative;
  min-height: min(92vh, 860px);
  display: flex;
  align-items: flex-end;
  padding: 2rem 0 4.5rem;
  overflow: clip;
}

.iso-hero-plane {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(5, 7, 11, 0.92) 0%, rgba(5, 7, 11, 0.55) 42%, rgba(5, 7, 11, 0.2) 70%),
    radial-gradient(ellipse at 70% 40%, rgba(34, 211, 238, 0.16), transparent 55%);
}

.iso-hero-mark {
  position: absolute;
  right: -4%;
  top: 6%;
  width: min(62vw, 680px);
  opacity: 0.92;
  filter: drop-shadow(0 28px 70px rgba(8, 145, 178, 0.28));
  animation: isoFloat 6s ease-in-out infinite;
}

.iso-hero-glow {
  position: absolute;
  inset: auto -10% 0 30%;
  height: 45%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.18), transparent 65%);
  filter: blur(28px);
}

.iso-hero-copy {
  position: relative;
  z-index: 2;
  max-width: 36rem;
  padding-bottom: 0.5rem;
  animation: isoRise 780ms ease both;
}

.iso-hero h1 {
  margin: 0 0 0.9rem;
  font-family: var(--iso-font-display);
  font-size: clamp(2.2rem, 5.6vw, 3.55rem);
  line-height: 1.04;
  letter-spacing: -0.04em;
  font-weight: 800;
}

.iso-hero-lead {
  margin: 0 0 1.5rem;
  color: var(--iso-muted);
  font-size: 1.08rem;
  max-width: 32rem;
}

.iso-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.iso-section {
  padding: 4.5rem 0;
}

.iso-section h2 {
  margin: 0 0 0.75rem;
  font-family: var(--iso-font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: -0.03em;
}

.iso-section-lead {
  margin: 0 0 2rem;
  color: var(--iso-muted);
  max-width: 40rem;
}

.iso-promise {
  border-top: 1px solid var(--iso-line);
  border-bottom: 1px solid var(--iso-line);
}

.iso-promise-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.iso-stat {
  padding: 1.25rem 0;
}

.iso-stat strong {
  display: block;
  font-family: var(--iso-font-display);
  font-size: 1.45rem;
  letter-spacing: -0.03em;
  margin-bottom: 0.35rem;
}

.iso-stat span {
  color: var(--iso-muted);
  font-size: 0.95rem;
}

.iso-feature-grid {
  display: grid;
  gap: 1.75rem 2rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.iso-feature-grid article h3 {
  margin: 0 0 0.4rem;
  font-family: var(--iso-font-display);
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.iso-feature-grid article p {
  margin: 0;
  color: var(--iso-muted);
  font-size: 0.96rem;
}

.iso-download-platforms {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.iso-download-card {
  padding: 1.35rem 1.4rem 1.5rem;
  border: 1px solid var(--iso-line);
  border-radius: 18px;
  background: var(--iso-panel);
}

.iso-download-card h3 {
  margin: 0.55rem 0 0.45rem;
  font-family: var(--iso-font-display);
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.iso-download-card > p {
  margin: 0;
  color: var(--iso-muted);
}

.iso-install-steps {
  margin: 1.1rem 0 0;
  padding-left: 1.2rem;
  color: var(--iso-muted);
  font-size: 0.94rem;
  display: grid;
  gap: 0.45rem;
}

.iso-install-steps li {
  padding-left: 0.15rem;
}

.iso-install-steps code {
  font-size: 0.86em;
  word-break: break-all;
}

.iso-warning-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.iso-warning-card {
  padding: 1.35rem 1.4rem 1.5rem;
  border: 1px solid rgba(34, 211, 238, 0.22);
  border-radius: 18px;
  background: linear-gradient(165deg, rgba(8, 145, 178, 0.1), rgba(255, 255, 255, 0.03));
}

.iso-warning-card h3 {
  margin: 0.55rem 0 0.45rem;
  font-family: var(--iso-font-display);
  font-size: 1.2rem;
  letter-spacing: -0.03em;
}

.iso-warning-card > p {
  margin: 0;
  color: var(--iso-muted);
  font-size: 0.96rem;
}

.iso-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1.25rem;
  counter-reset: iso-step;
}

.iso-steps li {
  counter-increment: iso-step;
  display: grid;
  gap: 0.25rem;
  padding-left: 3rem;
  position: relative;
}

.iso-steps li::before {
  content: counter(iso-step);
  position: absolute;
  left: 0;
  top: 0;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: rgba(34, 211, 238, 0.14);
  color: var(--iso-cyan);
  font-weight: 800;
  font-family: var(--iso-font-display);
}

.iso-steps strong {
  font-family: var(--iso-font-display);
  font-size: 1.15rem;
}

.iso-steps span {
  color: var(--iso-muted);
}

.iso-platform-list {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.iso-platform-list h3 {
  margin: 0 0 0.4rem;
  font-family: var(--iso-font-display);
}

.iso-platform-list p {
  margin: 0 0 0.85rem;
  color: var(--iso-muted);
}

.iso-badge {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.12);
  color: var(--iso-cyan);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.iso-pricing-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.iso-plan {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: 1.35rem 1.25rem;
  border: 1px solid var(--iso-line);
  border-radius: 18px;
  background: var(--iso-panel);
  min-height: 100%;
  transition: border-color 180ms ease, transform 180ms ease;
}

.iso-plan:hover {
  border-color: rgba(34, 211, 238, 0.35);
  transform: translateY(-2px);
}

.iso-plan-featured {
  border-color: rgba(34, 211, 238, 0.45);
  background: linear-gradient(180deg, rgba(34, 211, 238, 0.1), rgba(255, 255, 255, 0.02));
  position: relative;
}

.iso-plan-badge {
  align-self: flex-start;
  display: inline-block;
  margin-bottom: 0.15rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.18);
  color: var(--iso-cyan);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.iso-plan h3 {
  margin: 0;
  font-family: var(--iso-font-display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.iso-plan-price {
  margin: 0;
  font-family: var(--iso-font-display);
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.iso-plan-price span {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--iso-muted);
}

.iso-plan p {
  margin: 0;
  color: var(--iso-muted);
  font-size: 0.92rem;
  flex: 1;
}

.iso-plan ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.4rem;
  color: var(--iso-muted);
  font-size: 0.9rem;
}

.iso-plan ul li::before {
  content: "✓ ";
  color: var(--iso-cyan);
  font-weight: 700;
}

.iso-compare {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.5rem;
}

.iso-compare th,
.iso-compare td {
  text-align: left;
  padding: 0.85rem 0.65rem;
  border-bottom: 1px solid var(--iso-line);
  vertical-align: top;
}

.iso-compare th {
  font-family: var(--iso-font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.iso-compare td {
  color: var(--iso-muted);
  font-size: 0.94rem;
}

.iso-faq {
  display: grid;
  gap: 0.75rem;
}

.iso-faq details {
  border-bottom: 1px solid var(--iso-line);
  padding: 0.85rem 0;
}

.iso-faq summary {
  cursor: pointer;
  font-family: var(--iso-font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.iso-faq p {
  margin: 0.65rem 0 0;
  color: var(--iso-muted);
}

.iso-contact {
  border-top: 1px solid var(--iso-line);
}

.iso-support-label {
  margin: 0 0 0.35rem;
  color: var(--iso-muted);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 700;
}

.iso-support-email {
  display: inline-block;
  margin: 0.25rem 0 0.85rem;
  font-family: var(--iso-font-display);
  font-size: clamp(1.45rem, 3.5vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--iso-cyan);
  text-decoration: underline;
  text-underline-offset: 6px;
  animation: isoPulseSoft 3.2s ease-in-out infinite;
}

.iso-contact-note {
  margin: 0;
  color: var(--iso-muted);
  max-width: 34rem;
}

.iso-page-hero {
  padding: 3rem 0 1rem;
}

.iso-page-hero h1 {
  margin: 0 0 0.75rem;
  font-family: var(--iso-font-display);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  letter-spacing: -0.04em;
}

.iso-prose {
  color: var(--iso-muted);
  max-width: 46rem;
}

.iso-prose h2 {
  color: var(--iso-ink);
  margin-top: 2rem;
}

.iso-prose a {
  color: var(--iso-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.iso-prose ul {
  margin: 0.75rem 0 1rem;
  padding-left: 1.25rem;
}

.iso-prose li {
  margin: 0.35rem 0;
}

.iso-note {
  margin-top: 1.25rem;
  color: var(--iso-muted);
  font-size: 0.92rem;
  max-width: 40rem;
}

.iso-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.iso-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.iso-footer {
  border-top: 1px solid var(--iso-line);
  padding: 2rem 0 2.5rem;
  color: var(--iso-muted);
  font-size: 0.92rem;
}

.iso-footer-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
}

.iso-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

@keyframes isoRise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes isoFloat {
  0%,
  100% {
    transform: translateY(0) rotate(-1.5deg);
  }
  50% {
    transform: translateY(-16px) rotate(1deg);
  }
}

@keyframes isoPulseSoft {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.82;
  }
}

@media (max-width: 820px) {
  .iso-nav-links .iso-hide-sm {
    display: none;
  }

  .iso-hero {
    min-height: auto;
    padding-top: 1.25rem;
    padding-bottom: 3rem;
    align-items: flex-start;
  }

  .iso-hero-plane {
    background:
      linear-gradient(180deg, rgba(5, 7, 11, 0.35) 0%, rgba(5, 7, 11, 0.92) 58%),
      radial-gradient(ellipse at 50% 20%, rgba(34, 211, 238, 0.16), transparent 55%);
  }

  .iso-hero-mark {
    position: relative;
    right: auto;
    top: auto;
    width: min(72vw, 340px);
    margin: 0 0 1.25rem auto;
  }

  .iso-compare {
    display: block;
    overflow-x: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .iso-reveal {
    opacity: 1;
    transform: none;
  }
}

/* Suggestions For Features and Additions Later:
 * - Locale-specific landing pages (en-US / en-GB)
 * - Custom domain pointing at this Hosting site
 * - Auto-detect OS to highlight the matching download card
 */

.iso-keyword-strip {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.iso-keyword-strip li {
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--iso-line);
  border-radius: 999px;
  color: var(--iso-muted);
  font-size: 0.88rem;
  font-weight: 600;
}

.iso-split {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.iso-split-pane {
  padding: 1.35rem 1.25rem;
  border-top: 1px solid var(--iso-line);
}

.iso-split-pane-accent {
  border-color: rgba(34, 211, 238, 0.35);
}

.iso-split-pane h3 {
  margin: 0 0 0.85rem;
  font-family: var(--iso-font-display);
  letter-spacing: -0.02em;
}

.iso-check-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.45rem;
  color: var(--iso-muted);
  font-size: 0.95rem;
}

.iso-check-list li::before {
  content: "✓ ";
  color: var(--iso-cyan);
  font-weight: 700;
}

.iso-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  padding: 1rem 0 0.25rem;
  border-bottom: 1px solid var(--iso-line);
  color: var(--iso-muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.iso-toc a:hover {
  color: var(--iso-cyan);
}

.iso-guide-block {
  border-bottom: 1px solid var(--iso-line);
}

.iso-guide-grid {
  display: grid;
  gap: 1.35rem 1.75rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.iso-guide-grid article h3 {
  margin: 0 0 0.4rem;
  font-family: var(--iso-font-display);
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.iso-guide-grid article p {
  margin: 0 0 0.55rem;
  color: var(--iso-muted);
  font-size: 0.95rem;
}

.iso-guide-block code {
  font-size: 0.9em;
  color: var(--iso-cyan);
}