/* ============================================================
   DreamBig Inc. — one-page company site
   Direction: dark luxury tech, warm coral/rose heartbeat accent
   ============================================================ */

:root {
  /* Palette */
  --color-bg: oklch(16% 0.012 285);
  --color-bg-raised: oklch(20% 0.014 285);
  --color-surface: oklch(23% 0.016 290);
  --color-border: oklch(32% 0.02 290 / 0.55);
  --color-text: oklch(94% 0.008 80);
  --color-text-dim: oklch(72% 0.012 285);
  --color-text-faint: oklch(56% 0.014 285);

  /* HeartOS warm accent — used only for heart/product moments */
  --color-heart: oklch(70% 0.19 25);
  --color-heart-deep: oklch(58% 0.21 15);
  --color-heart-soft: oklch(70% 0.19 25 / 0.14);

  /* Type */
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --text-lead: clamp(1.125rem, 1rem + 0.5vw, 1.375rem);
  --text-h2: clamp(1.75rem, 1.3rem + 2vw, 2.75rem);
  --text-hero: clamp(2.625rem, 1.4rem + 6vw, 6rem);

  /* Rhythm */
  --space-section: clamp(5rem, 3.5rem + 7vw, 11rem);
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --content-width: 68rem;
  --prose-width: 44rem;

  /* Motion */
  --duration-fast: 180ms;
  --duration-slow: 700ms;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light-mode visitors still get the intended dark design; the site
   is dark by design, so no light palette is defined. */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Atmosphere: faint grain + a warm glow that lives behind the hero */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
}

::selection {
  background: var(--color-heart-deep);
  color: var(--color-text);
}

a {
  color: inherit;
}

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

.wrap {
  width: min(var(--content-width), 100% - 2 * var(--gutter));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

/* ---------- Header ---------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  background: color-mix(in oklab, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}

.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  display: flex;
  align-items: baseline;
  gap: 0.15rem;
}

.brand .brand-dot {
  width: 0.45em;
  height: 0.45em;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-heart), var(--color-heart-deep));
  align-self: center;
  transform: translateY(0.08em);
}

.site-nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2.25rem);
}

.site-nav a {
  text-decoration: none;
  color: var(--color-text-dim);
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  padding: 0.35rem 0;
  border-bottom: 1px solid transparent;
  transition: color var(--duration-fast) ease, border-color var(--duration-fast) ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--color-text);
  border-bottom-color: var(--color-heart);
}

.site-nav a:focus-visible {
  outline: 2px solid var(--color-heart);
  outline-offset: 4px;
  border-radius: 2px;
}

@media (max-width: 40rem) {
  .site-nav a.nav-legal {
    display: none;
  }
}

/* ---------- Hero ---------- */

.hero {
  min-height: 92svh;
  display: grid;
  align-content: center;
  padding-top: 7rem;
  padding-bottom: var(--space-section);
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -15%;
  width: 60vw;
  height: 60vw;
  max-width: 55rem;
  max-height: 55rem;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    oklch(58% 0.21 15 / 0.16) 0%,
    oklch(58% 0.21 15 / 0.05) 45%,
    transparent 70%
  );
  pointer-events: none;
}

.hero-kicker {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin: 0 0 1.5rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 700;
  margin: 0;
  max-width: 13ch;
}

.hero h1 .heart-word {
  background: linear-gradient(100deg, var(--color-heart) 10%, var(--color-heart-deep) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  font-size: var(--text-lead);
  color: var(--color-text-dim);
  max-width: 34rem;
  margin: 2rem 0 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.75rem;
}

/* ECG pulse line spanning the hero bottom */
.pulse-line {
  position: absolute;
  bottom: clamp(2rem, 6vh, 4rem);
  left: 0;
  width: 100%;
  height: 60px;
  overflow: visible;
  opacity: 0.9;
}

.pulse-line path {
  fill: none;
  stroke: url(#pulseGradient);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
  animation: drawPulse 3.2s var(--ease-out-expo) 0.4s forwards;
}

@keyframes drawPulse {
  to {
    stroke-dashoffset: 0;
  }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  padding: 0.8rem 1.6rem;
  border-radius: 999px;
  transition: transform var(--duration-fast) var(--ease-out-expo),
    background-color var(--duration-fast) ease,
    border-color var(--duration-fast) ease;
}

.btn:active {
  transform: scale(0.97);
}

.btn:focus-visible {
  outline: 2px solid var(--color-heart);
  outline-offset: 3px;
}

.btn-primary {
  background: linear-gradient(120deg, var(--color-heart), var(--color-heart-deep));
  color: oklch(15% 0.02 15);
  font-weight: 600;
}

.btn-primary:hover {
  transform: translateY(-2px);
}

.btn-ghost {
  border: 1px solid var(--color-border);
  color: var(--color-text-dim);
}

.btn-ghost:hover {
  border-color: var(--color-heart);
  color: var(--color-text);
}

/* ---------- Sections ---------- */

.section {
  padding-block: var(--space-section);
  border-top: 1px solid var(--color-border);
}

.section-kicker {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-heart);
  margin: 0 0 1rem;
}

.section h2 {
  font-family: var(--font-display);
  font-size: var(--text-h2);
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin: 0 0 1.25rem;
  max-width: 22ch;
}

.section .lead {
  color: var(--color-text-dim);
  font-size: var(--text-lead);
  max-width: var(--prose-width);
  margin: 0;
}

/* ---------- HeartOS feature panel ---------- */

.heartos-panel {
  margin-top: 3.5rem;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  background: linear-gradient(160deg, var(--color-bg-raised), var(--color-bg) 70%);
  border: 1px solid var(--color-border);
  border-radius: 1.5rem;
  padding: clamp(1.75rem, 4vw, 3.5rem);
  position: relative;
  overflow: hidden;
}

.heartos-panel::after {
  content: "";
  position: absolute;
  bottom: -40%;
  right: -20%;
  width: 34rem;
  height: 34rem;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-heart-soft), transparent 65%);
  pointer-events: none;
}

.heartos-copy h3 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 1.2rem + 1.4vw, 2.25rem);
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

.heartos-copy p {
  color: var(--color-text-dim);
  max-width: 32rem;
  margin: 0 0 1.5rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-heart);
  background: var(--color-heart-soft);
  border: 1px solid oklch(70% 0.19 25 / 0.3);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  margin-bottom: 1.5rem;
}

.badge::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-heart);
  animation: beat 1.6s ease-in-out infinite;
}

@keyframes beat {
  0%, 100% { transform: scale(1); opacity: 1; }
  35% { transform: scale(1.45); opacity: 0.7; }
}

/* Big soft heart mark built from CSS */
.heartos-visual {
  display: grid;
  place-items: center;
  min-height: 14rem;
}

.heart-mark {
  width: clamp(8rem, 18vw, 12rem);
  aspect-ratio: 1;
  position: relative;
  filter: drop-shadow(0 0 40px oklch(58% 0.21 15 / 0.45));
  animation: heartbeat 2.4s var(--ease-out-expo) infinite;
}

.heart-mark svg {
  width: 100%;
  height: 100%;
}

@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  8% { transform: scale(1.06); }
  16% { transform: scale(1); }
  24% { transform: scale(1.04); }
  32% { transform: scale(1); }
}

@media (max-width: 52rem) {
  .heartos-panel {
    grid-template-columns: 1fr;
  }
  .heartos-visual {
    order: -1;
    min-height: 10rem;
  }
}

/* ---------- Support ---------- */

.support-grid {
  margin-top: 3rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1.25rem;
}

.support-card {
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  padding: 1.75rem;
  transition: border-color var(--duration-fast) ease, transform var(--duration-fast) var(--ease-out-expo);
}

.support-card:hover {
  border-color: oklch(70% 0.19 25 / 0.4);
  transform: translateY(-3px);
}

.support-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  margin: 0 0 0.5rem;
}

.support-card p {
  color: var(--color-text-dim);
  font-size: 0.95rem;
  margin: 0;
}

.support-card a {
  color: var(--color-heart);
  text-decoration: none;
  border-bottom: 1px solid oklch(70% 0.19 25 / 0.35);
  transition: border-color var(--duration-fast) ease;
}

.support-card a:hover,
.support-card a:focus-visible {
  border-bottom-color: var(--color-heart);
}

/* ---------- Legal prose ---------- */

.legal .prose {
  max-width: var(--prose-width);
  color: var(--color-text-dim);
}

.legal .prose h3 {
  font-family: var(--font-display);
  color: var(--color-text);
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  margin: 2.25rem 0 0.5rem;
}

.legal .prose p,
.legal .prose li {
  font-size: 0.95rem;
  line-height: 1.7;
}

.legal .prose ul {
  padding-left: 1.2rem;
}

.legal .updated {
  font-size: 0.8rem;
  color: var(--color-text-faint);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 2rem;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: 3rem;
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  align-items: center;
  justify-content: space-between;
  color: var(--color-text-faint);
  font-size: 0.85rem;
}

.site-footer a {
  color: var(--color-text-dim);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--color-text);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .pulse-line path {
    animation: none;
    stroke-dashoffset: 0;
  }
  .heart-mark,
  .badge::before {
    animation: none;
  }
}