@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600&display=swap');

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

:root {
  --bg:        #f4f7fb;
  --white:     #ffffff;
  --border:    rgba(15,23,42,0.09);
  --shadow:    0 1px 4px rgba(15,23,42,0.06), 0 6px 20px rgba(15,23,42,0.05);
  --shadow-h:  0 8px 24px rgba(15,23,42,0.10), 0 20px 56px rgba(15,23,42,0.08);
  --ink:       #0f172a;
  --ink-soft:  #475569;
  --ink-mute:  #94a3b8;
  --accent:    #2563eb;
  --accent-d:  #1d4ed8;
  --accent-bg: #eff6ff;
  --wa:        #25d366;
  /* color de acento por proyecto (se sobreescribe en cada página) */
  --theme:     #2563eb;
  --theme-bg:  #eff6ff;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 16px;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
  overflow-x: hidden;
}

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

/* ══════ NAV ══════ */
.topnav {
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 32px;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 14px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.83rem;
  font-weight: 500;
  color: var(--ink-soft);
  transition: color 0.2s;
}

.back-link:hover { color: var(--theme); }
.topnav__divider { color: var(--ink-mute); font-size: 0.8rem; }
.topnav__current { font-size: 0.83rem; color: var(--ink-mute); }

/* ══════ HERO ══════ */
.hero {
  position: relative;
  border-bottom: 1px solid var(--border);
  padding: 64px 32px 56px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 55% 60% at 12% 0%, color-mix(in srgb, var(--theme) 13%, transparent) 0%, transparent 55%),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(15,23,42,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15,23,42,0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 70% 80% at 30% 20%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 30% 20%, #000 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  animation: heroIn 0.6s cubic-bezier(0.22,1,0.36,1) both;
}

@keyframes heroIn {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero__top { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.hero__logo { height: 48px; width: auto; object-fit: contain; }

.hero__kicker {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--theme);
  background: var(--theme-bg);
  border: 1px solid color-mix(in srgb, var(--theme) 20%, transparent);
  padding: 5px 12px;
  border-radius: 999px;
}

.hero__title {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: clamp(1.9rem, 5vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink);
  line-height: 1.05;
}

/* frase de beneficio principal */
.hero__lead {
  font-size: 1.15rem;
  color: var(--ink);
  font-weight: 500;
  line-height: 1.5;
  max-width: 680px;
}

.hero__desc { font-size: 0.95rem; color: var(--ink-soft); line-height: 1.7; max-width: 680px; }

/* ══════ CONTENT ══════ */
.content {
  max-width: 860px;
  margin: 0 auto;
  padding: 56px 24px 80px;
  display: flex;
  flex-direction: column;
  gap: 56px;
}

.section-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--theme);
  margin-bottom: 20px;
}

/* ══════ PROBLEMA / SOLUCIÓN ══════ */
.ps-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 600px) { .ps-grid { grid-template-columns: 1fr; } }

.ps-card {
  border-radius: 16px;
  padding: 26px;
  border: 1px solid var(--border);
}

.ps-card--problem { background: #fef2f2; border-color: rgba(239,68,68,0.18); }
.ps-card--solution { background: var(--theme-bg); border-color: color-mix(in srgb, var(--theme) 20%, transparent); }

.ps-card__tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.ps-card--problem .ps-card__tag { color: #dc2626; }
.ps-card--solution .ps-card__tag { color: var(--theme); }

.ps-card h3 {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
  line-height: 1.3;
}

.ps-card p { font-size: 0.88rem; color: var(--ink-soft); line-height: 1.6; }

/* ══════ FEATURES ══════ */
.features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

@media (max-width: 600px) { .features { grid-template-columns: 1fr; } }

.feature {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature:hover { transform: translateY(-2px); box-shadow: var(--shadow-h); }

.feature__icon {
  width: 38px;
  height: 38px;
  background: var(--theme-bg);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--theme);
}

.feature__text h3 { font-size: 0.9rem; font-weight: 600; margin-bottom: 4px; color: var(--ink); }
.feature__text p  { font-size: 0.82rem; color: var(--ink-soft); line-height: 1.55; }

/* ══════ SCREENSHOTS ══════ */
.screenshots {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

@media (max-width: 700px) { .screenshots { grid-template-columns: 1fr; } }

.screenshot {
  border-radius: 12px;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.screenshot img { width: 100%; height: 190px; object-fit: cover; display: block; }

.screenshot__placeholder {
  width: 100%;
  height: 190px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--ink-mute);
  font-size: 0.77rem;
  background: var(--bg);
}

.screenshot__caption { padding: 10px 14px; font-size: 0.75rem; font-weight: 500; color: var(--ink-soft); }

/* ══════ STACK ══════ */
.stack-groups { display: flex; flex-direction: column; gap: 12px; }
.stack-group { display: flex; gap: 12px; align-items: baseline; flex-wrap: wrap; }
.stack-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--ink-mute);
  width: 88px;
  flex-shrink: 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 10px;
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--ink-soft);
}

/* ══════ CTA ══════ */
.cta {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  border-radius: 20px;
  padding: 44px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 70% at 20% 0%, color-mix(in srgb, var(--theme) 45%, transparent) 0%, transparent 55%),
    radial-gradient(ellipse 45% 50% at 90% 100%, rgba(37,211,102,0.22) 0%, transparent 55%);
  pointer-events: none;
}

.cta > * { position: relative; }

.cta h2 {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 1.45rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}

.cta p { font-size: 0.92rem; color: rgba(255,255,255,0.65); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: var(--wa);
  color: #fff;
  border-radius: 999px;
  padding: 14px 30px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  margin-top: 4px;
}

.btn:hover { background: #1ebe5d; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,211,102,0.4); }

/* ══════ NAV ENTRE PROYECTOS ══════ */
.proj-nav {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px 64px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.proj-nav__link {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 16px 22px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--white);
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  max-width: 48%;
}

.proj-nav__link:hover { transform: translateY(-2px); box-shadow: var(--shadow-h); border-color: var(--theme); }
.proj-nav__link--next { text-align: right; align-items: flex-end; }
.proj-nav__dir { font-size: 0.72rem; color: var(--ink-mute); }
.proj-nav__name { font-family: 'Space Grotesk', system-ui, sans-serif; font-weight: 700; font-size: 0.95rem; color: var(--ink); }

/* ══════ WHATSAPP FLOTANTE ══════ */
.wa-float {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 200;
  width: 56px;
  height: 56px;
  background: var(--wa);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 20px rgba(37,211,102,0.45);
  transition: transform 0.2s, box-shadow 0.2s;
}

.wa-float::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid var(--wa);
  animation: waPulse 2s ease-out infinite;
}

@keyframes waPulse {
  0%   { transform: scale(1);   opacity: 0.7; }
  100% { transform: scale(1.6); opacity: 0; }
}

.wa-float:hover { transform: scale(1.1); box-shadow: 0 6px 28px rgba(37,211,102,0.55); }

/* ══════ FOOTER ══════ */
footer {
  border-top: 1px solid var(--border);
  background: var(--white);
  padding: 24px;
  text-align: center;
  font-size: 0.75rem;
  color: var(--ink-mute);
}

/* ══════ ANIMACIÓN ON-SCROLL ══════ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.in { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .reveal, .hero__inner { opacity: 1; transform: none; animation: none; }
  *, *::before, *::after { animation: none !important; }
}

/* ══════ RESPONSIVE ══════ */
@media (max-width: 640px) {
  .topnav { padding: 0 16px; }
  .hero { padding: 44px 20px 40px; }
  .content { padding: 40px 16px 56px; }
  .cta { padding: 32px 22px; }
  .stack-group { flex-direction: column; gap: 6px; }
  .stack-label { width: auto; }
  .proj-nav { flex-direction: column; }
  .proj-nav__link { max-width: 100%; }
  .proj-nav__link--next { text-align: left; align-items: flex-start; }
  .wa-float { bottom: 20px; right: 20px; width: 52px; height: 52px; }
}