/* ============================================================
   HELAX AI — style.css
   Lime-green premium SaaS theme
   (inspired by the prostex AI-video reference layout)
   Pure CSS3 — no frameworks
   ============================================================ */

/* ============ 1. Design tokens ============ */
:root {
  --primary: #65a30d;        /* lime-600 — links, icons, focus */
  --primary-dark: #4d7c0f;   /* lime-700 — hover states */
  --accent: #a3e635;         /* lime-400 — CTA surfaces, glows */
  --accent-deep: #84cc16;    /* lime-500 */
  --emerald: #10b981;

  --background: #ffffff;
  --surface: #f5faec;
  --surface-2: #ecf5dd;
  --navy: #101806;           /* near-black green for dark sections */
  --text: #131c08;
  --muted: #5c6b4e;
  --border: #e2ecd3;

  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 28px;

  --shadow-sm: 0 1px 2px rgba(19, 28, 8, 0.06);
  --shadow-md: 0 10px 30px -12px rgba(19, 28, 8, 0.16);
  --shadow-lg: 0 24px 60px -20px rgba(19, 28, 8, 0.28);
  --shadow-lime: 0 12px 30px -10px rgba(132, 204, 22, 0.55);

  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;

  --header-h: 72px;
  --gradient: linear-gradient(120deg, var(--accent-deep), var(--emerald));
}

/* ============ 2. Reset & base ============ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
  overflow-x: clip;
}

body {
  font-family: var(--font);
  background: var(--background);
  color: var(--text);
  line-height: 1.6;
  font-size: 1rem;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

/* Soft green ambient background behind the hero */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(700px 500px at 88% -5%, rgba(163, 230, 53, 0.28), transparent 60%),
    radial-gradient(620px 520px at -10% 22%, rgba(16, 185, 129, 0.16), transparent 60%),
    linear-gradient(180deg, #ecf6da 0%, #f7fcf0 42%, #ffffff 72%);
}

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

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

ul,
ol {
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

input {
  font: inherit;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: #d9f99d;
  color: #3f6212;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 200;
  background: var(--primary);
  color: #fff;
  padding: 10px 18px;
  border-radius: 10px;
  font-weight: 600;
  transition: top 0.25s ease;
}

.skip-link:focus {
  top: 12px;
}

/* ============ 3. Layout utilities ============ */
.container {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2rem);
}

.container-narrow {
  max-width: 820px;
}

.section {
  padding-block: clamp(4rem, 8vw, 6.5rem);
  background: var(--background);
}

.section-alt {
  background: var(--surface);
}

.section-head {
  max-width: 640px;
  margin: 0 auto clamp(2.5rem, 5vw, 4rem);
  text-align: center;
}

.section-lead {
  font-size: 1.075rem;
  color: var(--muted);
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary-dark);
  background: #ecfccb;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.eyebrow-light {
  color: #d9f99d;
  background: rgba(163, 230, 53, 0.14);
}

h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}

h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 0.9rem;
}

h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

.section-head p {
  color: var(--muted);
  font-size: 1.05rem;
}

/* ============ 4. Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

/* Lime pill CTA */
.btn-primary {
  background: var(--accent);
  color: #1a2e05;
  box-shadow: var(--shadow-lime);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: var(--accent-deep);
  box-shadow: 0 16px 36px -10px rgba(132, 204, 22, 0.6);
}

/* Circular arrow chip inside the lime pill */
.btn-chip {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #101806;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.btn-primary:hover .btn-chip {
  transform: rotate(-45deg);
}

/* Dark pill (nav "Get Started" style) */
.btn-dark {
  background: #131c08;
  color: #fff;
  box-shadow: var(--shadow-md);
}

.btn-dark:hover {
  transform: translateY(-2px);
  background: #1e2c0e;
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: #fff;
  color: var(--text);
  border-color: var(--border);
}

.btn-outline:hover {
  transform: translateY(-2px);
  border-color: var(--accent-deep);
  color: var(--primary-dark);
  background: #f4fbe4;
  box-shadow: var(--shadow-md);
}

.btn-ghost {
  color: var(--text);
  background: transparent;
}

.btn-ghost:hover {
  color: var(--primary-dark);
  background: #eef6dc;
}

/* For dark sections: lime pill */
.btn-light {
  background: var(--accent);
  color: #1a2e05;
  box-shadow: var(--shadow-lime);
}

.btn-light:hover {
  transform: translateY(-2px);
  background: var(--accent-deep);
  box-shadow: 0 16px 36px -10px rgba(132, 204, 22, 0.55);
}

.btn-outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
}

.btn-outline-light:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-lg {
  padding: 15px 26px;
  font-size: 1rem;
}

.btn-sm {
  padding: 10px 18px;
  font-size: 0.88rem;
}

.btn-block {
  width: 100%;
}

/* Play-circle text link (hero secondary CTA) */
.btn-play {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  padding: 6px 4px;
  border-radius: 999px;
  transition: color 0.2s ease;
}

.btn-play:hover {
  color: var(--primary-dark);
}

.play-circle {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  color: var(--primary-dark);
  flex-shrink: 0;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-play:hover .play-circle {
  transform: scale(1.08);
  box-shadow: var(--shadow-lime);
}

/* ============ 5. Reveal-on-scroll animations ============ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

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

/* ============ 6. Announcement bar ============ */
.announce {
  position: relative;
  z-index: 60;
  background: #101806;
  color: #d9e8bb;
  font-size: 0.84rem;
  text-align: center;
  padding: 9px 16px;
}

.announce-text {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}

.announce-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(163, 230, 53, 0.6);
  animation: pulseDot 2.2s ease-out infinite;
}

.announce-link {
  color: #bef264;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s ease;
}

.announce-link:hover {
  color: #ffffff;
}

/* ============ 7. Navbar (slides in after the hero) ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  -webkit-backdrop-filter: blur(14px) saturate(1.5);
  backdrop-filter: blur(14px) saturate(1.5);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 6px 24px -12px rgba(19, 28, 8, 0.12);
}

/* Desktop: hidden while the hero panel (with its own nav) is in view */
@media (min-width: 1024px) {
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    transform: translateY(-105%);
    visibility: hidden;
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), visibility 0.35s;
  }

  .site-header.header-show {
    transform: translateY(0);
    visibility: visible;
  }
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}

/* Real logo file (favicon.png): square frame crops the mark
   above the baked-in wordmark, which the adjacent text replaces */
.brand-mark {
  position: relative;
  display: block;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: 0 6px 16px -8px rgba(19, 28, 8, 0.35);
  flex-shrink: 0;
}

.brand-mark img {
  position: absolute;
  left: 50%;
  top: 0;
  width: 132%;
  height: auto;
  transform: translateX(-50%);
}

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

.nav-links {
  display: none;
  align-items: center;
  gap: 6px;
}

.nav-link {
  position: relative;
  padding: 8px 14px;
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--muted);
  border-radius: 999px;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-link:hover {
  color: var(--text);
  background: var(--surface-2);
}

.nav-link.is-active {
  color: var(--primary-dark);
}

.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient);
}

.nav-actions {
  display: none;
  align-items: center;
  gap: 8px;
}

/* Hamburger */
.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
  transition: background-color 0.2s ease;
}

.nav-toggle:hover {
  background: var(--surface);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu panel */
.mobile-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.97);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  padding: 12px clamp(1rem, 4vw, 2rem) 24px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity 0.28s ease, transform 0.28s ease, visibility 0.28s;
}

.mobile-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  padding-block: 8px;
}

.mobile-link {
  display: block;
  padding: 13px 10px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  border-radius: 10px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s ease, transform 0.3s ease, background-color 0.2s ease, color 0.2s ease;
}

.mobile-menu.open .mobile-link {
  opacity: 1;
  transform: none;
}

.mobile-link:hover {
  background: #eef6dc;
  color: var(--primary-dark);
}

.mobile-link.is-active {
  color: var(--primary-dark);
}

.mobile-actions {
  display: grid;
  gap: 10px;
  margin-top: 14px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

body.menu-open {
  overflow: hidden;
}

/* ============ 8. Hero — rounded app-panel with collage ============ */
.hero {
  padding: clamp(10px, 1.6vw, 20px) clamp(10px, 1.6vw, 20px) clamp(2rem, 4vw, 3.5rem);
}

.hero-shell {
  max-width: 1440px;
  margin-inline: auto;
}

.hero-panel {
  position: relative;
  overflow: hidden;
  background: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: clamp(1.25rem, 3vw, 2.5rem) clamp(1.25rem, 3.5vw, 3.5rem) clamp(2rem, 4vw, 3.5rem);
  display: flex;
  flex-direction: column;
}

@media (min-width: 1024px) {
  .hero-panel {
    min-height: calc(100svh - 110px);
    justify-content: space-between;
  }
}

/* --- Inner nav row (desktop) --- */
.hero-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.hero-nav-links {
  display: none;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.hero-nav-actions {
  display: none;
  align-items: center;
  gap: 8px;
}

/* --- Hero content grid --- */
.hero-content {
  display: grid;
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: center;
  flex: 1;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1.4rem;
}

.badge-flag {
  font-size: 1rem;
  line-height: 1;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6.2vw, 4.6rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.02;
  margin-bottom: 1.4rem;
}

.hero-title .hl-accent {
  color: var(--primary);
}

.hero-title .spark {
  display: inline-block;
  width: 0.55em;
  height: 0.55em;
  margin-right: 0.12em;
  color: var(--accent-deep);
  vertical-align: baseline;
  animation: sparkSpin 9s linear infinite;
}

.hero-sub {
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  color: var(--muted);
  max-width: 32rem;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-bottom: 1.6rem;
}

.hero-trust {
  font-size: 0.84rem;
  color: var(--muted);
  letter-spacing: 0.02em;
}

/* Avatar stack */
.avatar-stack {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: clamp(1.75rem, 3vw, 2.75rem);
}

.avatars {
  display: flex;
  flex-shrink: 0;
}

.avatars span {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: var(--shadow-sm);
  margin-left: -10px;
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
}

.avatars span:first-child {
  margin-left: 0;
}

.avatars .av-1 { background: linear-gradient(135deg, #84cc16, #059669); }
.avatars .av-2 { background: linear-gradient(135deg, #a3e635, #65a30d); color: #1a2e05; }
.avatars .av-3 { background: linear-gradient(135deg, #10b981, #0d9488); }

.avatar-copy strong {
  display: block;
  font-size: 0.92rem;
  line-height: 1.3;
}

.avatar-copy small {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
}

/* --- Collage visual --- */
.hero-collage {
  position: relative;
  min-height: 420px;
}

.collage-card {
  position: absolute;
  margin: 0;
  border-radius: 22px;
  overflow: hidden;
  border: 4px solid #ffffff;
  box-shadow: var(--shadow-lg);
  animation: cardFloat 8s ease-in-out infinite;
}

.collage-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cc-main {
  width: 56%;
  aspect-ratio: 4 / 5;
  top: 0;
  left: 2%;
  transform: rotate(-6deg);
  z-index: 1;
}

.cc-alt {
  width: 58%;
  aspect-ratio: 4 / 3;
  top: 24%;
  right: 0;
  transform: rotate(5deg);
  z-index: 2;
  animation-delay: -3.5s;
}

.collage-chip {
  position: absolute;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: var(--shadow-md);
  z-index: 3;
}

.chip-1 {
  top: 4%;
  left: 52%;
  background: linear-gradient(135deg, #84cc16, #059669);
  animation: cardFloat 7s ease-in-out infinite;
}

.chip-2 {
  bottom: 34%;
  left: 0;
  background: linear-gradient(135deg, #10b981, #0d9488);
  animation: cardFloat 9s ease-in-out infinite;
  animation-delay: -2s;
}

/* Glass "project brief" card */
.brief-card {
  position: absolute;
  bottom: 4%;
  left: 2%;
  width: min(260px, 62%);
  background: rgba(255, 255, 255, 0.86);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(226, 236, 211, 0.9);
  border-radius: 18px;
  box-shadow: var(--shadow-lg);
  padding: 16px 18px 14px;
  z-index: 4;
  animation: cardFloat 8s ease-in-out infinite;
  animation-delay: -5s;
}

.brief-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.brief-avatar {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--gradient);
  color: #fff;
  flex-shrink: 0;
}

.brief-head strong {
  display: block;
  font-size: 0.86rem;
  line-height: 1.2;
}

.brief-head small {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
}

.brief-card p {
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--muted);
  margin-bottom: 8px;
}

.brief-arrow {
  position: absolute;
  right: 14px;
  bottom: 12px;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #131c08;
  color: var(--accent);
}

/* Floating toolbar */
.collage-toolbar {
  position: absolute;
  bottom: 0;
  right: 4%;
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.9);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(226, 236, 211, 0.9);
  border-radius: 999px;
  box-shadow: var(--shadow-lg);
  padding: 8px 12px;
  z-index: 5;
  animation: cardFloat 7s ease-in-out infinite;
  animation-delay: -1.5s;
}

.collage-toolbar button {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  color: var(--text);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.collage-toolbar button:hover {
  background: #eef6dc;
  color: var(--primary-dark);
}

.collage-toolbar .tool-active {
  background: #131c08;
  color: var(--accent);
}

/* ============ 9. Model showcase ============ */
.model-card {
  display: grid;
  gap: 2.5rem;
  align-items: center;
  background:
    radial-gradient(600px 300px at 85% 0%, rgba(163, 230, 53, 0.12), transparent 60%),
    #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: clamp(1.75rem, 4vw, 3.5rem);
}

.model-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary-dark);
  background: #ecfccb;
  border-radius: 999px;
  padding: 5px 12px;
  margin-bottom: 1rem;
}

.model-info h3 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 700;
  margin-bottom: 0.7rem;
}

.model-desc {
  color: var(--muted);
  margin-bottom: 1.5rem;
  max-width: 30rem;
}

.model-list {
  display: grid;
  gap: 12px;
  margin-bottom: 2rem;
}

.model-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  font-size: 0.96rem;
  color: var(--text);
}

.model-list svg {
  color: var(--primary);
  flex-shrink: 0;
}

.model-viz {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 320px;
}

.viz-rings {
  position: relative;
  width: 300px;
  height: 300px;
  display: grid;
  place-items: center;
}

.viz-core {
  width: 110px;
  height: 110px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.7rem;
  letter-spacing: -0.02em;
  color: #fff;
  background:
    radial-gradient(circle at 30% 25%, rgba(255, 255, 255, 0.75), transparent 42%),
    linear-gradient(140deg, #84cc16, #10b981);
  box-shadow:
    0 0 44px rgba(132, 204, 22, 0.5),
    inset 0 0 26px rgba(255, 255, 255, 0.25);
  animation: corePulse 5s ease-in-out infinite;
}

.viz-ring {
  position: absolute;
  border-radius: 50%;
}

.viz-ring-1 {
  width: 170px;
  height: 170px;
  border: 1px dashed rgba(132, 204, 22, 0.5);
  animation: spinSlow 16s linear infinite;
}

.viz-ring-2 {
  width: 225px;
  height: 225px;
  border: 1px solid rgba(16, 185, 129, 0.3);
  animation: spinSlow 24s linear infinite reverse;
}

.viz-ring-3 {
  width: 290px;
  height: 290px;
  border: 1px dashed rgba(132, 204, 22, 0.25);
  animation: spinSlow 34s linear infinite;
}

.viz-ring span {
  position: absolute;
  top: -5px;
  left: 50%;
  width: 10px;
  height: 10px;
  margin-left: -5px;
  border-radius: 50%;
  background: var(--accent-deep);
  box-shadow: 0 0 12px rgba(132, 204, 22, 0.85);
}

.viz-ring-2 span {
  background: var(--emerald);
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.85);
}

.viz-chip {
  position: absolute;
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--primary-dark);
  background: rgba(255, 255, 255, 0.85);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  animation: cardFloat 8s ease-in-out infinite;
}

.viz-chip-1 { top: 8%; left: 6%; }
.viz-chip-2 { bottom: 10%; left: 10%; animation-delay: -3s; }
.viz-chip-3 { top: 22%; right: 2%; animation-delay: -5.5s; }

/* ============ 10. Generic cards & grids ============ */
.card-grid {
  display: grid;
  gap: 20px;
}

.feature-card,
.eco-card,
.why-card,
.use-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.feature-card:hover,
.eco-card:hover,
.why-card:hover,
.use-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(132, 204, 22, 0.45);
}

.feature-card h3,
.why-card h3,
.use-card h3 {
  margin: 18px 0 8px;
}

.eco-card h3 {
  margin: 18px 0 6px;
}

.feature-card p,
.eco-card p,
.why-card p,
.use-card p {
  color: var(--muted);
  font-size: 0.94rem;
}

.icon-wrap {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  color: var(--primary-dark);
  background: linear-gradient(140deg, #ecfccb, #d1fae5);
  border: 1px solid rgba(132, 204, 22, 0.2);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-card:hover .icon-wrap,
.eco-card:hover .icon-wrap,
.why-card:hover .icon-wrap,
.use-card:hover .icon-wrap {
  transform: scale(1.06) rotate(-3deg);
  box-shadow: var(--shadow-lime);
}

.eco-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #047857;
  background: #d1fae5;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 16px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--primary-dark);
  transition: gap 0.2s ease, color 0.2s ease;
}

.card-link:hover {
  gap: 8px;
  color: var(--primary);
}

/* ============ 11. Helax Magic ============ */
.magic-grid-layout {
  display: grid;
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: center;
}

.magic-copy h2 {
  margin-bottom: 0.9rem;
}

.magic-points {
  display: grid;
  gap: 12px;
  margin-top: 1.6rem;
}

.magic-points li {
  position: relative;
  padding-left: 30px;
  color: var(--text);
  font-weight: 500;
  font-size: 0.97rem;
}

.magic-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background:
    linear-gradient(#fff, #fff) padding-box,
    var(--gradient) border-box;
  border: 2px solid transparent;
}

.magic-points li::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 9px;
  width: 8px;
  height: 4px;
  border-left: 2px solid var(--primary);
  border-bottom: 2px solid var(--primary);
  transform: rotate(-45deg);
}

.magic-panel {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: clamp(1.25rem, 3vw, 2rem);
}

.magic-controls {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.magic-input {
  flex: 1;
  width: 100%;
  padding: 13px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.magic-input::placeholder {
  color: #93a383;
}

.magic-input:focus {
  outline: none;
  border-color: var(--accent-deep);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(163, 230, 53, 0.2);
}

.magic-status {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 1.5em;
  margin: 14px 2px 18px;
  font-size: 0.85rem;
  color: var(--muted);
}

.magic-status.busy {
  color: var(--primary-dark);
}

.magic-status.busy::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid rgba(132, 204, 22, 0.3);
  border-top-color: var(--primary-dark);
  animation: spinSlow 0.8s linear infinite;
}

.magic-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.magic-tile {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.magic-tile:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.tile-art {
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  background:
    linear-gradient(var(--surface-2) 1px, transparent 1px),
    linear-gradient(90deg, var(--surface-2) 1px, transparent 1px);
  background-size: 18px 18px;
  transition: background 0.4s ease;
}

.tile-label {
  padding: 8px 12px;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--muted);
  border-top: 1px solid var(--border);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.magic-tile.done .tile-art {
  animation: tileIn 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.magic-tile.done .tile-label {
  color: var(--primary-dark);
}

/* ============ 12. How it works (steps) ============ */
.steps {
  position: relative;
  display: grid;
  gap: 2.25rem;
  max-width: 980px;
  margin-inline: auto;
}

.step {
  position: relative;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(132, 204, 22, 0.45);
}

.step-num {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: #1a2e05;
  background: var(--accent);
  box-shadow: var(--shadow-lime);
  margin-bottom: 18px;
}

.step h3 {
  margin-bottom: 8px;
}

.step p {
  color: var(--muted);
  font-size: 0.94rem;
}

/* ============ 13. Developer section (dark) ============ */
.devs {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(800px 400px at 15% 0%, rgba(163, 230, 53, 0.22), transparent 55%),
    radial-gradient(700px 400px at 90% 100%, rgba(16, 185, 129, 0.2), transparent 55%),
    var(--navy);
}

.devs::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, #000 30%, transparent 100%);
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, #000 30%, transparent 100%);
  pointer-events: none;
}

.devs h2,
.devs h3 {
  color: #fff;
}

.devs-grid {
  position: relative;
  display: grid;
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: center;
}

.devs-copy .section-lead {
  color: #b6c79b;
  margin-bottom: 1.6rem;
}

.devs-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 2rem;
}

.devs-chips li {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #d9f99d;
  background: rgba(163, 230, 53, 0.12);
  border: 1px solid rgba(190, 242, 100, 0.3);
}

.devs-note {
  margin-top: 14px;
  font-size: 0.82rem;
  color: #8ba073;
}

.code-window {
  background: #0a0f03;
  border: 1px solid rgba(190, 242, 100, 0.16);
  border-radius: var(--radius);
  box-shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.7);
  overflow: hidden;
}

.code-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(190, 242, 100, 0.12);
}

.code-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.code-dot-r { background: #f87171; }
.code-dot-y { background: #fbbf24; }
.code-dot-g { background: #34d399; }

.code-file {
  margin-left: 8px;
  font-size: 0.78rem;
  color: #8ba073;
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

.code-body {
  padding: 22px 24px;
  overflow-x: auto;
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.75;
  color: #e2f0cd;
}

.tok-c { color: #6b7a5c; font-style: italic; }
.tok-k { color: #bef264; }
.tok-s { color: #86efac; }
.tok-f { color: #a3e635; }

/* ============ 14. Community ============ */
.community-card {
  position: relative;
  overflow: hidden;
  text-align: center;
  background:
    radial-gradient(600px 260px at 50% -10%, rgba(163, 230, 53, 0.14), transparent 60%),
    #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1.5rem, 5vw, 4rem);
}

.co-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary-dark);
  background: #ecfccb;
  border: 1px solid rgba(132, 204, 22, 0.25);
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 1.4rem;
}

.community-card h2 {
  max-width: 34rem;
  margin-inline: auto;
}

.community-card > p {
  color: var(--muted);
  max-width: 36rem;
  margin: 0 auto 1.6rem;
}

.co-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 28px;
  margin-bottom: 2.2rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.co-meta li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.co-meta svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* ============ 15. FAQ ============ */
.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.faq-item.open {
  border-color: rgba(132, 204, 22, 0.5);
  box-shadow: var(--shadow-md);
}

.faq-heading {
  margin: 0;
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  text-align: left;
  padding: 20px 22px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.faq-q:hover {
  color: var(--primary-dark);
  background: var(--surface);
}

.faq-icon {
  flex-shrink: 0;
  color: var(--primary-dark);
  transition: transform 0.3s ease;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.faq-a-inner {
  padding: 0 22px 22px;
  color: var(--muted);
  font-size: 0.95rem;
}

.faq-a-inner a {
  color: var(--primary-dark);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ============ 16. Final CTA ============ */
.cta-section {
  padding-top: 0;
  background: transparent;
}

.cta-panel {
  position: relative;
  overflow: hidden;
  text-align: center;
  color: #fff;
  background:
    radial-gradient(700px 320px at 20% 0%, rgba(163, 230, 53, 0.3), transparent 55%),
    radial-gradient(700px 320px at 85% 100%, rgba(16, 185, 129, 0.28), transparent 55%),
    linear-gradient(130deg, #0b1204, #152208 55%, #0f1d0c);
  border-radius: calc(var(--radius-lg) + 6px);
  padding: clamp(3rem, 7vw, 5.5rem) clamp(1.5rem, 5vw, 4rem);
  box-shadow: var(--shadow-lg);
}

.cta-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  pointer-events: none;
}

.cta-glow-a {
  width: 340px;
  height: 340px;
  top: -140px;
  left: -80px;
  background: rgba(132, 204, 22, 0.5);
  animation: glowDrift 10s ease-in-out infinite alternate;
}

.cta-glow-b {
  width: 300px;
  height: 300px;
  bottom: -140px;
  right: -60px;
  background: rgba(16, 185, 129, 0.45);
  animation: glowDrift 12s ease-in-out infinite alternate-reverse;
}

.cta-panel h2 {
  position: relative;
  color: #fff;
  font-size: clamp(2.1rem, 5vw, 3.2rem);
  margin-bottom: 1rem;
}

.cta-panel > p {
  position: relative;
  color: #c4d6a8;
  max-width: 34rem;
  margin: 0 auto 2.2rem;
}

.cta-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

/* ============ 17. Footer ============ */
.site-footer {
  background: #f3f8ea;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  gap: 40px;
  padding-block: clamp(3rem, 6vw, 4.5rem);
}

.footer-brand p {
  color: var(--muted);
  font-size: 0.94rem;
  margin: 14px 0 18px;
  max-width: 260px;
}

.brand-footer {
  font-size: 1.1rem;
}

.socials {
  display: flex;
  gap: 10px;
}

.socials a {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  color: var(--muted);
  background: #fff;
  border: 1px solid var(--border);
  transition: color 0.2s ease, transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.socials a:hover {
  color: var(--primary-dark);
  transform: translateY(-2px);
  border-color: rgba(132, 204, 22, 0.5);
  box-shadow: var(--shadow-md);
}

.footer-title {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 16px;
}

.footer-col ul {
  display: grid;
  gap: 10px;
}

.footer-col a {
  color: var(--muted);
  font-size: 0.94rem;
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: var(--primary-dark);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-block: 20px;
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
  justify-content: space-between;
  font-size: 0.86rem;
  color: var(--muted);
}

.footer-made {
  font-weight: 600;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ============ 18. Keyframes ============ */
@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes pulseDot {
  0% { box-shadow: 0 0 0 0 rgba(163, 230, 53, 0.55); }
  70% { box-shadow: 0 0 0 9px rgba(163, 230, 53, 0); }
  100% { box-shadow: 0 0 0 0 rgba(163, 230, 53, 0); }
}

@keyframes spinSlow {
  to { transform: rotate(360deg); }
}

@keyframes cardFloat {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -10px; }
}

@keyframes corePulse {
  0%, 100% { box-shadow: 0 0 44px rgba(132, 204, 22, 0.5), inset 0 0 26px rgba(255, 255, 255, 0.25); }
  50% { box-shadow: 0 0 64px rgba(16, 185, 129, 0.55), inset 0 0 30px rgba(255, 255, 255, 0.32); }
}

@keyframes glowDrift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(40px, 24px) scale(1.12); }
}

@keyframes tileIn {
  from { opacity: 0.3; transform: scale(0.94); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes sparkSpin {
  to { transform: rotate(360deg); }
}

/* ============ 19. Responsive: ≥ 640px ============ */
@media (min-width: 640px) {
  .magic-controls {
    flex-direction: row;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

/* ============ 20. Responsive: ≥ 768px (tablet) ============ */
@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .magic-grid {
    gap: 16px;
  }

  .steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
  }

  .steps::before {
    content: "";
    position: absolute;
    top: 58px;
    left: 12%;
    right: 12%;
    height: 2px;
    background: linear-gradient(90deg, rgba(132, 204, 22, 0.15), rgba(132, 204, 22, 0.5), rgba(16, 185, 129, 0.15));
    z-index: 0;
  }

  .step {
    z-index: 1;
  }

  .model-card {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .magic-grid-layout {
    grid-template-columns: 0.9fr 1.1fr;
  }

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

  .hero-collage {
    min-height: 520px;
  }
}

/* ============ 21. Responsive: ≥ 1024px (desktop) ============ */
@media (min-width: 1024px) {
  .hero-nav-links {
    display: flex;
  }

  .hero-nav-actions {
    display: flex;
  }

  .hero-content {
    grid-template-columns: 1fr 0.95fr;
  }

  .nav-links {
    display: flex;
  }

  .nav-actions {
    display: flex;
  }

  .nav-toggle {
    display: none;
  }

  .mobile-menu {
    display: none;
  }

  body.menu-open {
    overflow: auto;
  }

  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }

  .footer-brand {
    grid-column: auto;
  }
}

/* ============ 22. Responsive: ≥ 1280px ============ */
@media (min-width: 1280px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }

  .hero-collage {
    min-height: 560px;
  }
}

/* ============ 23. Small screens fine-tuning (≤ 560px) ============ */
@media (max-width: 560px) {
  .hero {
    padding: 10px 10px 2rem;
  }

  .hero-panel {
    border-radius: 22px;
  }

  .hero-collage {
    min-height: 380px;
  }

  .cc-main {
    width: 58%;
    left: 0;
  }

  .cc-alt {
    width: 62%;
    top: 20%;
  }

  .brief-card {
    width: min(230px, 68%);
    left: 0;
    bottom: 6%;
    padding: 14px 14px 12px;
  }

  .brief-card p:nth-of-type(2) {
    display: none;
  }

  .collage-toolbar {
    right: 0;
    padding: 6px 8px;
  }

  .collage-toolbar button {
    width: 30px;
    height: 30px;
  }

  .hero-cta .btn,
  .cta-actions .btn {
    width: 100%;
  }

  .btn-play {
    justify-content: center;
    width: 100%;
  }

  .steps::before {
    content: "";
    position: absolute;
    top: 10px;
    bottom: 10px;
    left: 27px;
    width: 2px;
    background: linear-gradient(180deg, rgba(132, 204, 22, 0.15), rgba(132, 204, 22, 0.5), rgba(16, 185, 129, 0.15));
  }

  .step {
    padding-left: 76px;
  }

  .step-num {
    position: absolute;
    left: 0;
    top: 22px;
    margin-bottom: 0;
  }
}

/* ============ 24. Reduced motion ============ */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

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