/* ==========================================================================
   Javier Pérez — Portfolio
   Dirección visual: "blueprint / plano de ingeniería"
   Tema claro, motivo de retícula técnica y stack de capas como firma.
   ========================================================================== */

/* --- Tokens ------------------------------------------------------------- */
:root {
  --paper:        #f4f6f8;
  --surface:      #ffffff;
  --ink:          #10233a;
  --ink-soft:     #52657a;
  --ink-faint:    #8496a8;
  --line:         #dce4ec;
  --line-blue:    #c3d3e2;
  --accent:       #1d5dd8;
  --accent-dark:  #164bb0;
  --accent-wash:  #e8f0fd;
  --deep:         #0c1e33;
  --deep-line:    #1c3a55;
  --ok:           #1f9e6b;
  --warn:         #b8791f;

  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body:    "IBM Plex Sans", system-ui, sans-serif;
  --font-mono:    "IBM Plex Mono", ui-monospace, monospace;

  --wrap:   1120px;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 35, 58, .06), 0 8px 24px rgba(16, 35, 58, .06);
  --ease:   cubic-bezier(.22, .61, .36, 1);
}

/* --- Reset -------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--accent); text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ink);
}

/* --- Utilidades de estructura ------------------------------------------ */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 24px;
}

.section { padding-block: 96px; }
.section--tight { padding-block: 64px; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--line-blue);
}

.section-head { max-width: 620px; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(28px, 4vw, 40px); margin-top: 14px; }
.section-head p { color: var(--ink-soft); margin-top: 14px; }

.lead { font-size: 19px; color: var(--ink-soft); }

/* --- Botones ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.02em;
  padding: 13px 22px;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease);
}

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

.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-dark); }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-blue);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn--on-deep { color: #fff; border-color: rgba(255, 255, 255, .28); }
.btn--on-deep:hover { border-color: #fff; color: #fff; }

.btn__arrow { transition: transform .18s var(--ease); }
.btn:hover .btn__arrow { transform: translateX(3px); }

/* --- Cabecera / navegación --------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(244, 246, 248, .85);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.brand__mark {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid var(--accent);
  border-radius: 7px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  padding: 0;
}

.nav__link {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink-soft);
  padding: 8px 14px;
  border-radius: 7px;
  transition: color .15s var(--ease), background .15s var(--ease);
}
.nav__link:hover { color: var(--ink); background: rgba(29, 93, 216, .07); }
.nav__link.is-active { color: var(--accent); background: var(--accent-wash); }

.nav__cta { margin-left: 8px; }

.nav__toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  cursor: pointer;
  color: var(--ink);
}

/* --- Hero --------------------------------------------------------------- */
.hero {
  position: relative;
  background: var(--deep);
  color: #eaf1f8;
  overflow: hidden;
}

/* Retícula técnica de fondo (motivo blueprint). */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(120, 160, 210, .10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 210, .10) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(120% 90% at 20% 0%, #000 55%, transparent 100%);
  -webkit-mask-image: radial-gradient(120% 90% at 20% 0%, #000 55%, transparent 100%);
}

.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 56px;
  align-items: center;
  padding-block: 92px;
}

.hero .eyebrow { color: #7fb0f0; }
.hero .eyebrow::before { background: #35597f; }

.hero h1 {
  color: #fff;
  font-size: clamp(38px, 6vw, 66px);
  margin-top: 20px;
  letter-spacing: -0.03em;
}

.hero h1 .accent { color: #6fa8f5; }

.hero__sub {
  margin-top: 22px;
  max-width: 46ch;
  color: #b7c6d6;
  font-size: 18px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.hero__meta {
  display: flex;
  gap: 28px;
  margin-top: 44px;
  padding-top: 26px;
  border-top: 1px solid var(--deep-line);
  font-family: var(--font-mono);
  font-size: 13px;
  color: #8ea6bd;
}
.hero__meta strong { display: block; color: #fff; font-size: 22px; font-weight: 600; }

/* --- Firma: stack de capas --------------------------------------------- */
.stack {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.stack__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #6f8aa4;
  margin-bottom: 4px;
}

.layer {
  display: grid;
  grid-template-columns: 40px 1fr;
  align-items: center;
  gap: 16px;
  padding: 15px 18px;
  border: 1px solid var(--deep-line);
  border-radius: 9px;
  background: rgba(255, 255, 255, .025);
  transition: border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}
.layer:hover {
  border-color: #3d6da0;
  background: rgba(111, 168, 245, .08);
  transform: translateX(4px);
}

.layer__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: #6fa8f5;
  border-right: 1px solid var(--deep-line);
  padding-right: 14px;
}

.layer__name { color: #fff; font-weight: 600; font-size: 15px; }
.layer__tech {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: #8ea6bd;
  margin-top: 3px;
  letter-spacing: 0.01em;
}

/* --- Cards genéricas ---------------------------------------------------- */
.grid {
  display: grid;
  gap: 20px;
}
.grid--services { grid-template-columns: repeat(2, 1fr); }
.grid--projects { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  transition: border-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}
.card:hover {
  border-color: var(--line-blue);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.card__index {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.card__title { font-size: 21px; margin-top: 12px; }
.card__body { color: var(--ink-soft); margin-top: 12px; font-size: 15.5px; }

.card__list {
  list-style: none;
  padding: 0;
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.card__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  color: var(--ink-soft);
}
.card__list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--font-mono);
}

/* --- Tags de tecnología ------------------------------------------------- */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}
.tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
}

/* --- Proyectos (página) ------------------------------------------------- */
.project {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  padding: 34px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.project:hover { border-color: var(--line-blue); box-shadow: var(--shadow); }

.project__num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  letter-spacing: 0.1em;
}

.project__title { font-size: 24px; }
.project__role {
  font-family: var(--font-mono);
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
  margin-top: 6px;
  display: block;
}
.project__body { color: var(--ink-soft); margin-top: 16px; }

.project__deliverables {
  list-style: none;
  padding: 0;
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px 22px;
}
.project__deliverables li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--ink-soft);
}
.project__deliverables li::before {
  content: "▪";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 11px;
}

/* --- Banda CTA ---------------------------------------------------------- */
.cta-band {
  background: var(--deep);
  color: #fff;
  border-radius: 16px;
  padding: 54px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(120, 160, 210, .10) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(90deg, transparent, #000);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000);
}
.cta-band > * { position: relative; }
.cta-band h2 { color: #fff; font-size: clamp(26px, 3.5vw, 34px); }
.cta-band p { color: #b7c6d6; margin-top: 10px; max-width: 42ch; }

/* --- Encabezado de página interior ------------------------------------- */
.page-head {
  padding-block: 72px 8px;
  border-bottom: 1px solid var(--line);
}
.page-head h1 { font-size: clamp(34px, 5vw, 52px); margin-top: 16px; }
.page-head p { color: var(--ink-soft); margin-top: 16px; max-width: 60ch; }

/* --- Formulario --------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: start;
}

.form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px;
}

.form__note {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--warn);
  background: #fbf4e6;
  border: 1px solid #ecdcb8;
  border-radius: 7px;
  padding: 10px 14px;
  margin-bottom: 26px;
  display: flex;
  gap: 9px;
  align-items: center;
}

.field { margin-bottom: 20px; }
.field:last-of-type { margin-bottom: 26px; }

.field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}
.field label .req { color: var(--accent); }

.field input,
.field textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  transition: border-color .15s var(--ease), background .15s var(--ease), box-shadow .15s var(--ease);
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-wash);
}
.field textarea { resize: vertical; min-height: 130px; }

.form__status {
  display: none;
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 12px 15px;
  border-radius: 8px;
  margin-top: 4px;
}
.form__status.is-visible { display: block; }
.form__status--ok {
  color: var(--ok);
  background: #e9f7f0;
  border: 1px solid #bfe6d3;
}

/* Tarjeta lateral de contacto directo. */
.contact-aside {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
}
.contact-aside h3 { font-size: 18px; }
.contact-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.contact-item:last-child { border-bottom: none; padding-bottom: 0; }
.contact-item .k {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
}
.contact-item .v { font-size: 16px; color: var(--ink); }

/* --- Pie ---------------------------------------------------------------- */
.site-footer {
  background: var(--deep);
  color: #b7c6d6;
  padding-block: 54px 34px;
  margin-top: 8px;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--deep-line);
}
.footer-brand { color: #fff; font-family: var(--font-display); font-size: 20px; font-weight: 600; }
.footer-brand + p { margin-top: 8px; max-width: 34ch; font-size: 15px; }

.footer-nav {
  display: flex;
  gap: 26px;
  list-style: none;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 14px;
}
.footer-nav a { color: #b7c6d6; }
.footer-nav a:hover { color: #fff; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 24px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: #7089a1;
}

/* --- Reveal al hacer scroll -------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }

/* --- Responsive --------------------------------------------------------- */
@media (max-width: 900px) {
  .hero__inner { grid-template-columns: 1fr; gap: 40px; padding-block: 64px; }
  .contact-grid { grid-template-columns: 1fr; gap: 28px; }
  .grid--services,
  .grid--projects { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  body { font-size: 16px; }
  .section { padding-block: 64px; }

  .nav__links {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    padding: 12px 24px 20px;
    box-shadow: var(--shadow);
    display: none;
  }
  .nav__links.is-open { display: flex; }
  .nav__cta { margin-left: 0; margin-top: 6px; text-align: center; justify-content: center; }
  .nav__toggle { display: grid; place-items: center; }

  .project { grid-template-columns: 1fr; padding: 26px; }
  .project__num { writing-mode: horizontal-tb; transform: none; }
  .project__deliverables { grid-template-columns: 1fr; }
  .cta-band { padding: 40px 28px; }
}

/* --- Accesibilidad: foco visible y movimiento reducido ------------------ */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}