/* ============================================================
   CohetIA — landing styles
   Vanilla CSS, mobile-first
   ============================================================ */

:root {
  --color-primary: #1565C0;
  --color-primary-dark: #0D47A1;
  --color-accent: #2EC4A0;
  --color-accent-dark: #239E80;
  --color-text: #333333;
  --color-heading: #1A2E5A;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F7F9FC;
  --color-border: #E2E8F0;
  --color-muted: #6B7280;

  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(26, 46, 90, 0.06), 0 1px 2px rgba(26, 46, 90, 0.04);
  --shadow-md: 0 6px 18px rgba(26, 46, 90, 0.08), 0 2px 6px rgba(26, 46, 90, 0.05);
  --shadow-lg: 0 16px 40px rgba(26, 46, 90, 0.12);

  --container: 1120px;

  --nav-h: 72px;

  --transition: 200ms ease;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-dark); }

button { font: inherit; cursor: pointer; border: 0; background: none; }

h1, h2, h3, h4 {
  color: var(--color-heading);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); font-weight: 800; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); margin-bottom: 1.5rem; }
h3 { font-size: 1.35rem; margin-bottom: 0.75rem; }
h4 { font-size: 1.05rem; margin-bottom: 0.5rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-primary); }
p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

/* Container */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Sections */
section { scroll-margin-top: calc(var(--nav-h) + 16px); }
.section {
  padding: 4rem 0;
}
.section--alt { background: var(--color-bg-alt); }

@media (min-width: 768px) {
  .section { padding: 5rem 0; }
}
@media (min-width: 1024px) {
  .section { padding: 6rem 0; }
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: #ffffff;
  box-shadow: var(--shadow-sm);
  border-bottom-color: var(--color-border);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-heading);
}
.nav__brand:hover { color: var(--color-heading); }
.nav__brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.nav__name {
  font-weight: 800;
  font-size: 2.1rem;
  letter-spacing: -0.02em;
}
.nav__name--dark { color: var(--color-heading); }
.nav__name--light { color: var(--color-accent); }
.nav__tagline {
  font-size: 0.95rem;
  color: var(--color-muted);
  font-weight: 500;
}

.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 22px;
  padding: 0;
}
.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-heading);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(10px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-10px) rotate(-45deg); }

.nav__links {
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  flex-direction: column;
  gap: 0;
  padding: 1rem 1.25rem 1.5rem;
  box-shadow: var(--shadow-md);
  display: none;
}
.nav__links.open { display: flex; }
.nav__links a {
  padding: 0.75rem 0;
  color: var(--color-heading);
  font-weight: 500;
  border-bottom: 1px solid var(--color-border);
}
.nav__links a:last-child { border-bottom: 0; }

@media (min-width: 768px) {
  .nav__toggle { display: none; }
  .nav__links {
    position: static;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 2rem;
    padding: 0;
    background: transparent;
    box-shadow: none;
    border: 0;
  }
  .nav__links a {
    padding: 0;
    border-bottom: 0;
  }
  .nav__links a:not(.btn) {
    position: relative;
  }
  .nav__links a:not(.btn)::after {
    content: '';
    position: absolute;
    left: 0; right: 0; bottom: -6px;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
  }
  .nav__links a:not(.btn):hover::after { transform: scaleX(1); }
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1;
  transition: transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition);
  text-align: center;
  white-space: nowrap;
  border: 2px solid transparent;
  cursor: pointer;
}
.btn--sm {
  padding: 0.55rem 1rem;
  font-size: 0.9rem;
}
.btn--primary {
  background: var(--color-primary);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn--accent {
  background: var(--color-accent);
  color: #fff;
}
.btn--accent:hover {
  background: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn--secondary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--secondary:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-1px);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  padding: calc(var(--nav-h) + 3rem) 0 4rem;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(21, 101, 192, 0.10), transparent 60%),
    radial-gradient(800px 500px at 110% 10%, rgba(46, 196, 160, 0.10), transparent 60%),
    #fff;
}
.hero__inner {
  max-width: 900px;
}
.hero__title {
  margin-bottom: 1.5rem;
}
.hero__subtitle {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  color: var(--color-text);
  max-width: 760px;
  margin-bottom: 1rem;
}
.hero__subtitle--strong {
  font-weight: 600;
  color: var(--color-heading);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
}
.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .hero { padding: calc(var(--nav-h) + 5rem) 0 6rem; }
}

/* ============================================================
   PROSE / shared
   ============================================================ */
.prose p {
  max-width: 70ch;
  margin-bottom: 1.15rem;
}
.lead {
  font-size: 1.1rem;
  max-width: 70ch;
  margin-bottom: 1.5rem;
}

/* ============================================================
   CARDS / SERVICIOS
   ============================================================ */
.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}
@media (min-width: 768px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .cards { grid-template-columns: repeat(3, 1fr); }
}

.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(21, 101, 192, 0.25);
}
.card h3 {
  color: var(--color-heading);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
  align-self: flex-start;
}
.card p { margin-bottom: 0.9rem; }
.card__result {
  background: var(--color-bg-alt);
  border-left: 3px solid var(--color-accent);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
}
.card__cta {
  margin-top: auto;
  padding-top: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
}
.card__cta:hover { color: var(--color-primary-dark); }

/* ============================================================
   CASO REAL
   ============================================================ */
.case__subtitle {
  color: var(--color-primary);
  margin-bottom: 2rem;
  font-size: 1.25rem;
}
.case {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 1024px) {
  .case { grid-template-columns: repeat(3, 1fr); align-items: stretch; }
}
.case__block {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
}
.badge {
  display: inline-block;
  background: rgba(46, 196, 160, 0.12);
  color: var(--color-accent-dark);
  border: 1px solid rgba(46, 196, 160, 0.35);
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.95rem;
}

/* ============================================================
   SOBRE MI
   ============================================================ */
.about {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
  margin-top: 2rem;
}
@media (min-width: 768px) {
  .about {
    grid-template-columns: 320px 1fr;
    gap: 3rem;
  }
}
.about__photo {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.link {
  font-weight: 600;
}

/* ============================================================
   FINANCIACION
   ============================================================ */
.funding {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
@media (min-width: 768px) {
  .funding { grid-template-columns: repeat(3, 1fr); }
}
.funding li {
  background: #fff;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}
.funding strong {
  display: block;
  color: var(--color-heading);
  margin-bottom: 0.25rem;
}

/* ============================================================
   CONTACTO
   ============================================================ */
.contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2rem;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}
.form {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  background: #fff;
  padding: 1.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.form__field { display: flex; flex-direction: column; gap: 0.4rem; }
.form__field label {
  font-weight: 600;
  color: var(--color-heading);
  font-size: 0.95rem;
}
.form__field input,
.form__field textarea {
  font: inherit;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}
.form__field input:focus,
.form__field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.15);
}
.form__field textarea { resize: vertical; min-height: 120px; }
.form button[type="submit"] { align-self: flex-start; }

.contact__side {
  background: var(--color-bg-alt);
  padding: 1.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}
.contact__side h3 {
  color: var(--color-heading);
  font-size: 1.05rem;
  margin-bottom: 1rem;
}
.contact__side p { margin-bottom: 0.6rem; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--color-heading);
  color: #cbd5e1;
  padding: 2.5rem 0;
  font-size: 0.95rem;
}
.footer a { color: #fff; }
.footer a:hover { color: var(--color-accent); }
.footer__inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
}
@media (min-width: 768px) {
  .footer__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
  }
}
.footer__brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: #fff;
}
.footer__legal {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
}