:root {
  color-scheme: light;
  --bg: #F5F5F7;
  --text: #1D1D1F;
  --text2: #6E6E73;
  --accent: #C04E1F;
  --accent-hover: #AB4520;
  --btn-bg: #C04E1F;
  --btn-hover: #A54017;
  --card: rgba(255, 255, 255, 0.66);
  --card-border: rgba(255, 255, 255, 0.95);
  --line: rgba(0, 0, 0, 0.08);
  --chrome: rgba(245, 245, 247, 0.72);
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.10);
  --shadow-hover: 0 22px 44px rgba(0, 0, 0, 0.16);
  --shadow-bar: 0 1px 0 var(--line);
  --thumb-bg: #E8E8ED;
  --chip: rgba(120, 120, 128, 0.10);
  --chip-border: rgba(0, 0, 0, 0.06);
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #000000;
  --text: #F5F5F7;
  --text2: rgba(235, 235, 245, 0.62);
  --accent: #E8845A;
  --accent-hover: #F2A583;
  --btn-bg: #B4552A;
  --btn-hover: #C96A3A;
  --card: rgba(255, 255, 255, 0.08);
  --card-border: rgba(255, 255, 255, 0.14);
  --line: rgba(255, 255, 255, 0.14);
  --chrome: rgba(22, 22, 23, 0.78);
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
  --shadow-hover: 0 22px 44px rgba(0, 0, 0, 0.60);
  --shadow-bar: 0 1px 0 var(--line);
  --thumb-bg: #1C1C1E;
  --chip: rgba(255, 255, 255, 0.10);
  --chip-border: rgba(255, 255, 255, 0.12);
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI Variable", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  transition: background-color 0.3s ease, color 0.3s ease;
}

main {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 clamp(18px, 4vw, 32px);
}

::selection {
  background: color-mix(in srgb, var(--accent) 22%, transparent);
}

a {
  color: inherit;
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- Chrome (barra de cristal) ---------- */

.chrome {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  justify-content: flex-end;
  padding: 12px clamp(18px, 4vw, 32px);
  background: var(--chrome);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.chrome.scrolled {
  box-shadow: var(--shadow-bar);
}

.toggles {
  display: flex;
  gap: 8px;
}

.toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-width: 44px;
  height: 36px;
  padding: 0 14px;
  border: 1px solid var(--chip-border);
  border-radius: 980px;
  background: var(--chip);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: transform 0.18s ease, background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.toggle:hover {
  background: color-mix(in srgb, var(--chip) 60%, var(--card));
}

.toggle:active {
  transform: scale(0.94);
}

.toggle .icon {
  display: none;
}

[data-theme="dark"] .toggle .icon-moon {
  display: block;
}

[data-theme="light"] .toggle .icon-sun {
  display: block;
}

/* ---------- Intro ---------- */

.intro {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(24px, 5vw, 64px);
  flex-wrap: wrap;
  padding: clamp(56px, 10vw, 120px) 0 clamp(8px, 2vw, 24px);
  animation: rise 0.6s cubic-bezier(0.3, 0.7, 0.3, 1) both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.intro-text {
  flex: 1 1 320px;
}

.avatar-wrap {
  flex: 0 0 auto;
  width: 150px;
  height: 150px;
  display: grid;
  place-items: center;
  opacity: 1;
  transition: opacity 0.15s ease;
}

.avatar-wrap.theme-swap {
  opacity: 0;
}

h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 650;
  letter-spacing: -0.022em;
  line-height: 1.05;
  max-width: 18ch;
}

.sub {
  margin-top: 18px;
  font-size: clamp(1rem, 1.3vw, 1.125rem);
  color: var(--text2);
  max-width: 55ch;
  transition: color 0.3s ease;
}

/* ---------- Tarjetas ---------- */

.grid {
  display: grid;
  gap: 28px;
  margin-top: clamp(32px, 6vw, 56px);
}

.card {
  display: block;
  overflow: hidden;
  border-radius: 20px;
  background: var(--card);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  text-decoration: none;
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  backdrop-filter: blur(24px) saturate(180%);
  transition: transform 0.45s cubic-bezier(0.16, 0.84, 0.24, 1),
              box-shadow 0.35s ease,
              background-color 0.3s ease,
              border-color 0.3s ease;
}

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

.card:active {
  transform: scale(0.985);
  transition-duration: 0.12s;
}

.thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--thumb-bg);
}

.thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.01);
  transition: transform 0.6s cubic-bezier(0.3, 0.7, 0.3, 1);
}

.card:hover .thumb img {
  transform: scale(1.035);
}

.card-body {
  padding: 20px 24px 24px;
}

.card-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.card-link {
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: color 0.2s ease;
}

.card:hover .card-link {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent);
}

.card-desc {
  margin-top: 6px;
  font-size: 0.95rem;
  color: var(--text2);
  max-width: 48ch;
  transition: color 0.3s ease;
}

/* ---------- CTA ---------- */

.cta {
  text-align: center;
  max-width: 1040px;
  margin: 0 auto;
  padding: clamp(72px, 10vw, 120px) clamp(18px, 4vw, 32px) clamp(96px, 12vw, 140px);
}

.cta h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 650;
  letter-spacing: -0.022em;
  line-height: 1.12;
  max-width: 22ch;
  margin: 0 auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  margin-top: 26px;
  padding: 14px 32px;
  border-radius: 980px;
  background: var(--btn-bg);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  transition: transform 0.18s ease, background-color 0.2s ease;
}

.btn:hover {
  background: var(--btn-hover);
  transform: scale(1.02);
}

.btn:active {
  transform: scale(0.96);
}

/* ---------- Móvil: chrome como pill inferior ---------- */

@media (max-width: 767px) {
  body {
    padding-bottom: calc(96px + env(safe-area-inset-bottom));
  }

  .intro-text {
    flex-basis: 100%;
  }

  .avatar-wrap {
    margin: 28px auto 0;
  }

  .chrome {
    position: fixed;
    top: auto;
    bottom: calc(14px + env(safe-area-inset-bottom));
    left: 50%;
    transform: translateX(-50%);
    width: max-content;
    padding: 8px;
    border: 1px solid var(--card-border);
    border-radius: 26px;
    box-shadow: var(--shadow);
  }

  .chrome.scrolled {
    box-shadow: var(--shadow);
  }
}

/* ---------- Accesibilidad ---------- */

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

  .card:hover {
    transform: none;
  }
}

@media (prefers-reduced-transparency: reduce) {
  :root {
    --card: #FFFFFF;
    --chrome: #FBFBFD;
  }

  [data-theme="dark"] {
    --card: #1C1C1E;
    --chrome: #111111;
  }

  .chrome,
  .card {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
}

@media (prefers-contrast: more) {
  :root {
    --card: #FFFFFF;
    --chrome: #FBFBFD;
  }

  [data-theme="dark"] {
    --card: #1C1C1E;
    --chrome: #111111;
  }
}