/* grok.email — landing page styles */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:        #151924;
  --cyan:      #00aaee;
  --cyan-glow: #00ccff;
  --white:     #ffffff;
}

html, body {
  height: 100%;
  background-color: var(--bg);
  font-family: 'Inter', 'Segoe UI', sans-serif;
  color: var(--white);
  overflow-x: hidden;
}

/* ── Page wrapper ── */
.page-wrap {
  position: relative;
  min-height: 100vh;
  width: 100%;
}

/* ── Background image fills the wrapper ── */
.bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  z-index: 0;
}

/* ── Content sits on top ── */
.content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 16px 80px;
}

/* ── Logo: 142px from top on desktop, scales down ── */
.logo-wrap {
  margin-top: 142px;
  display: flex;
  justify-content: center;
  width: 100%;
  opacity: 0;
  transform: translateY(-20px);
  animation: fadeUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.1s forwards;
}

.logo-wrap img {
  /* Never wider than the viewport, never taller than 60vh */
  max-width: 100%;
  max-height: 60vh;
  width: auto;
  height: auto;
  display: block;
}

/* ── Tagline ── */
.tagline {
  /* Scales fluidly: min 0.9rem on tiny phones, max 1.35rem on desktop */
  font-size: clamp(0.9rem, 3vw, 1.35rem);
  font-weight: 300;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--white);
  margin-top: 12px;
  margin-bottom: 36px;
  /* Prevent text overflowing on narrow screens */
  padding: 0 8px;
  opacity: 0;
  transform: translateY(12px);
  animation: fadeUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.35s forwards;
}

.tagline span {
  color: var(--cyan-glow);
  font-weight: 500;
}

/* ── CTA button ── */
.cta-wrap {
  opacity: 0;
  transform: translateY(12px);
  animation: fadeUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.55s forwards;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 48px;
  background: transparent;
  border: 1.5px solid var(--cyan);
  border-radius: 4px;
  color: var(--white);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  /* Touch-friendly minimum tap target */
  min-height: 48px;
  transition: color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.btn-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--cyan);
  transform: translateX(-101%);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  z-index: -1;
}

.btn-cta:hover,
.btn-cta:focus-visible {
  color: var(--bg);
  border-color: var(--cyan-glow);
  box-shadow: 0 0 28px rgba(0, 204, 255, 0.4);
  outline: none;
}

.btn-cta:hover::before,
.btn-cta:focus-visible::before {
  transform: translateX(0);
}

.btn-cta .arrow {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform 0.25s ease;
}

.btn-cta:hover .arrow,
.btn-cta:focus-visible .arrow {
  transform: translateX(4px);
}

/* ── Animations ── */
@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .logo-wrap,
  .tagline,
  .cta-wrap { animation: none; opacity: 1; transform: none; }
}

/* ── Tablet (768px and below) ── */
@media (max-width: 768px) {
  .logo-wrap {
    margin-top: 100px;
  }
  .btn-cta {
    padding: 15px 40px;
  }
}

/* ── Large mobile / small tablet (480px and below) ── */
@media (max-width: 480px) {
  .logo-wrap {
    margin-top: 60px;
  }
  .tagline {
    letter-spacing: 0.1em;
    margin-bottom: 28px;
  }
  .btn-cta {
    padding: 14px 28px;
    font-size: 0.875rem;
    letter-spacing: 0.08em;
  }
}

/* ── Small phones (360px and below) ── */
@media (max-width: 360px) {
  .logo-wrap {
    margin-top: 40px;
  }
  .btn-cta {
    padding: 14px 20px;
    font-size: 0.8rem;
  }
}

/* ── Daylight mode overrides ── */
body.daylight {
  background-color: #f5f5f0;
}

body.daylight .tagline {
  color: #1a1a2e;
}

body.daylight .btn-cta {
  color: #1a1a2e;
  border-color: #00aaee;
}

body.daylight .btn-cta:hover {
  color: #f5f5f0;
}

/* Smooth transition between modes */
body {
  transition: background-color 1s ease;
}