/* =========================================================
   Luis Álvarez Vargas — Sitio personal
   Diseño elegante · efectos sutiles (filosofía Emil Kowalski)
   ========================================================= */

/* ---- Tema claro (default de respaldo; oscuro se impone vía [data-theme]) ---- */
:root {
  --bg: #f7f6f2;          /* crema cálido */
  --surface: #ffffff;
  --surface-2: #f1efe9;
  --ink: #1c1c1a;         /* carbón */
  --muted: #55554f;       /* gris cálido (contraste WCAG AA) */
  --line: #e3e1da;        /* borde suave */
  --accent: #5b6b58;      /* verde salvia */
  --accent-ink: #3f4d3d;
  --accent-contrast: #ffffff;
  --shadow: 0 10px 30px -12px rgba(28, 28, 26, 0.18);
  --shadow-sm: 0 4px 14px -8px rgba(28, 28, 26, 0.22);
  --bg-image: none;
  --bg-image-opacity: 0;

  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);

  --maxw: 1120px;
  --serif: "Playfair Display", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* ---- Tema oscuro (predeterminado del sitio) ---- */
[data-theme="dark"] {
  --bg: #16171a;                              /* carbón profundo */
  --surface: #1d1f23;
  --surface-2: #212428;
  --ink: #e1e1e1;                             /* tipografía tomada de alvarez.click */
  --muted: #a6a6a3;                           /* gris claro (contraste AA sobre oscuro) */
  --line: #2e3136;
  --accent: #8aa886;                          /* salvia claro para modo oscuro */
  --accent-ink: #cfe3cb;
  --accent-contrast: #16171a;
  --shadow: 0 14px 34px -14px rgba(0, 0, 0, 0.6);
  --shadow-sm: 0 6px 18px -10px rgba(0, 0, 0, 0.6);
  --bg-image: linear-gradient(rgba(22, 23, 26, 0.68), rgba(22, 23, 26, 0.74)), url("../imagenes/fondo-puerto.jpg");
  --bg-image-opacity: 0.5;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color 320ms var(--ease-out), color 320ms var(--ease-out);
  position: relative;
}

/* Fondo de imagen (tema oscuro) */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: var(--bg-image);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: var(--bg-image-opacity);
  pointer-events: none;
  transition: opacity 320ms var(--ease-out);
}

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

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

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
}

p { margin: 0 0 1.1em; color: var(--muted); }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 240ms var(--ease-out), background-color 240ms var(--ease-out);
}
.site-header.scrolled {
  border-bottom-color: var(--line);
  background: color-mix(in srgb, var(--bg) 90%, transparent);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.brand span { color: var(--accent); }
.nav-links {
  display: flex;
  gap: 30px;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  position: relative;
  font-size: 15px;
  color: var(--ink);
  padding: 6px 0;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1px;
  width: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 220ms var(--ease-out);
}
@media (hover: hover) and (pointer: fine) {
  .nav-links a:hover::after { transform: scaleX(1); }
}
.nav-links a.active { color: var(--accent-ink); }
.nav-links a.active::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  width: 42px;
  height: 42px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: transform 160ms var(--ease-out), border-color 200ms ease;
}
.nav-toggle:active { transform: scale(0.95); }
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  position: relative;
  transition: transform 200ms var(--ease-out), opacity 200ms ease;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

/* ---------- Theme toggle ---------- */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  margin-left: 8px;
  transition: transform 160ms var(--ease-out), border-color 200ms ease, color 200ms ease, background-color 200ms ease;
}
.theme-toggle:active { transform: scale(0.94); }
@media (hover: hover) and (pointer: fine) {
  .theme-toggle:hover { border-color: var(--ink); }
}
.theme-toggle svg { width: 19px; height: 19px; display: block; }
/* icon swap: show sun in dark, moon in light */
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }
.hero {
  position: relative;
  min-height: 86vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 60% at 80% 20%, rgba(91, 107, 88, 0.12), transparent 70%),
    radial-gradient(50% 50% at 10% 90%, rgba(28, 28, 26, 0.06), transparent 70%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 80px 0;
}
.hero-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.28em;
  font-size: 12px;
  color: var(--accent-ink);
  font-weight: 600;
  margin-bottom: 18px;
}
[data-theme="dark"] .hero-eyebrow { color: #b9d6b4; }
.hero h1 {
  font-size: clamp(40px, 6.5vw, 76px);
  margin-bottom: 18px;
}
.hero h1 em {
  font-style: italic;
  color: var(--accent-ink);
}
.hero-lead {
  font-size: 19px;
  max-width: 46ch;
  margin-bottom: 30px;
}
.hero-photo {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow);
  aspect-ratio: 4 / 5;
}
.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
  transition: transform 900ms var(--ease-out);
}
@media (hover: hover) and (pointer: fine) {
  .hero-photo:hover img { transform: scale(1.06); }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 500;
  padding: 13px 24px;
  border-radius: 12px;
  cursor: pointer;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg);
  transition: transform 160ms var(--ease-out), background-color 220ms ease, color 220ms ease, border-color 220ms ease;
}
.btn:active { transform: scale(0.97); }
@media (hover: hover) and (pointer: fine) {
  .btn:hover { background: var(--accent); border-color: var(--accent); color: var(--accent-contrast); }
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
@media (hover: hover) and (pointer: fine) {
  .btn-ghost:hover { border-color: var(--ink); background: transparent; color: var(--ink); }
}
[data-theme="dark"] .btn-ghost {
  border-color: #3c4046;
  color: var(--ink);
}
[data-theme="dark"] .btn-ghost:hover { border-color: var(--ink); }
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Sections ---------- */
section { padding: clamp(64px, 9vw, 116px) 0; }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head .eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: 12px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 14px;
}
.section-head h2 { font-size: clamp(28px, 4vw, 42px); }
.section-head p { font-size: 18px; }

.divider {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.about-photo {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  aspect-ratio: 1 / 1;
}
.about-photo img { width: 100%; height: 100%; object-fit: cover; }
.about-text h2 { font-size: clamp(26px, 3.4vw, 38px); }
.about-text .lead { font-size: 18px; color: var(--ink); }
.tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.tag {
  font-size: 13px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  transition: border-color 200ms ease, color 200ms ease;
}
@media (hover: hover) and (pointer: fine) {
  .tag:hover { border-color: var(--accent); color: var(--accent-ink); }
}

/* ---------- Cards (blog) ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 240ms var(--ease-out), box-shadow 240ms var(--ease-out), border-color 240ms ease, background-color 240ms ease;
}
@media (hover: hover) and (pointer: fine) {
  .card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
}
.card-media { aspect-ratio: 16 / 10; overflow: hidden; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 600ms var(--ease-out); }
@media (hover: hover) and (pointer: fine) {
  .card:hover .card-media img { transform: scale(1.05); }
}
.card-body { padding: 22px 22px 26px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.card-meta { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
.card h3 { font-size: 21px; margin: 0; }
.card p { font-size: 15px; margin: 0; }
.card-link {
  margin-top: auto;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: gap 200ms var(--ease-out), color 200ms ease;
}
@media (hover: hover) and (pointer: fine) {
  .card-link:hover { color: var(--accent-ink); gap: 12px; }
}

/* ---------- Gallery ---------- */
.gallery-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}
.filter-btn {
  font-family: var(--sans);
  font-size: 14px;
  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: transform 160ms var(--ease-out), border-color 200ms ease, color 200ms ease, background-color 200ms ease;
}
.filter-btn:active { transform: scale(0.96); }
.filter-btn.active { color: #fff; background: var(--ink); border-color: var(--ink); }
@media (hover: hover) and (pointer: fine) {
  .filter-btn:not(.active):hover { border-color: var(--ink); color: var(--ink); }
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.gallery-item {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  cursor: pointer;
  background: var(--surface-2);
  border: 1px solid var(--line);
  transition: opacity 360ms var(--ease-out), transform 360ms var(--ease-out);
}
.gallery-item.is-hidden { display: none; }
.gallery-item.fade-out { opacity: 0; transform: scale(0.98); }
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 700ms var(--ease-out);
}
@media (hover: hover) and (pointer: fine) {
  .gallery-item:hover img { transform: scale(1.06); }
}
.gallery-item .caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 40px 16px 14px;
  background: linear-gradient(to top, rgba(28,28,26,0.66), transparent);
  color: #fff;
  font-size: 14px;
  letter-spacing: 0.02em;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 260ms var(--ease-out), transform 260ms var(--ease-out);
}
@media (hover: hover) and (pointer: fine) {
  .gallery-item:hover .caption { opacity: 1; transform: translateY(0); }
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  background: rgba(20, 20, 18, 0.82);
  backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 260ms var(--ease-out);
}
.lightbox.open { opacity: 1; pointer-events: auto; }
.lightbox img {
  max-width: 92vw;
  max-height: 86vh;
  border-radius: 12px;
  box-shadow: 0 30px 80px -20px rgba(0,0,0,0.6);
  transform: scale(0.96);
  opacity: 0;
  transition: transform 320ms var(--ease-out), opacity 320ms var(--ease-out);
}
.lightbox.open img { transform: scale(1); opacity: 1; }
.lightbox-close {
  position: absolute;
  top: 22px;
  right: 26px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.35);
  background: rgba(255,255,255,0.08);
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 160ms var(--ease-out), background-color 200ms ease;
}
.lightbox-close:active { transform: scale(0.92); }
@media (hover: hover) and (pointer: fine) {
  .lightbox-close:hover { background: rgba(255,255,255,0.18); }
}

/* ---------- Contact / Form ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.form-field { margin-bottom: 20px; }
.form-field label {
  display: block;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink);
  margin-bottom: 8px;
  font-weight: 500;
}
.form-field input,
.form-field textarea {
  width: 100%;
  font-family: var(--sans);
  font-size: 15px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 13px 15px;
  transition: border-color 200ms ease, box-shadow 200ms ease, background-color 200ms ease;
}
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(91, 107, 88, 0.14);
}
.form-field textarea { resize: vertical; min-height: 130px; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-note { font-size: 13px; color: var(--muted); margin-top: 4px; }
.contact-info p { font-size: 16px; }
.contact-info a { color: var(--accent-ink); border-bottom: 1px solid var(--line); }
@media (hover: hover) and (pointer: fine) {
  .contact-info a:hover { border-bottom-color: var(--accent); }
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 32px;
  transform: translate(-50%, 16px);
  background: var(--ink);
  color: var(--bg);
  padding: 13px 22px;
  border-radius: 12px;
  font-size: 14px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity 240ms var(--ease-out), transform 240ms var(--ease-out);
  z-index: 120;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast.error { background: #7a2e2e; color: #fff; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 48px 0;
  margin-top: 40px;
  background: transparent;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-inner small { color: var(--muted); }
.footer-social { display: flex; gap: 18px; }
.footer-social a { font-size: 14px; color: var(--muted); transition: color 200ms ease; }
@media (hover: hover) and (pointer: fine) {
  .footer-social a:hover { color: var(--ink); }
}

/* ---------- Reveal on scroll (progressive enhancement) ---------- */
/* El contenido es visible por defecto. Solo se oculta si JS está activo,
   para que el sitio nunca quede en blanco si el script falla o no corre. */
.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 640ms var(--ease-out), transform 640ms var(--ease-out);
}
.js .reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Article (blog post) ---------- */
.article { max-width: 760px; margin: 0 auto; }
.article-hero {
  border-radius: 18px;
  overflow: hidden;
  aspect-ratio: 16 / 7;
  margin: 28px 0 40px;
  box-shadow: var(--shadow-sm);
}
.article-hero img { width: 100%; height: 100%; object-fit: cover; }
.article-meta { color: var(--accent); font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; font-weight: 600; }
.article h1 { font-size: clamp(30px, 5vw, 48px); margin: 14px 0 18px; }
.article-body { font-size: 18px; line-height: 1.8; }
.article-body h2 { font-size: 28px; margin-top: 42px; }
.article-body p { color: var(--ink); }
.article-body blockquote {
  margin: 32px 0;
  padding: 4px 0 4px 24px;
  border-left: 3px solid var(--accent);
  font-family: var(--serif);
  font-size: 22px;
  font-style: italic;
  color: var(--accent-ink);
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 8px;
  transition: gap 200ms var(--ease-out), color 200ms ease;
}
@media (hover: hover) and (pointer: fine) {
  .back-link:hover { color: var(--ink); gap: 12px; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 32px; padding: 56px 0; }
  .hero-photo { max-width: 360px; }
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .cards { grid-template-columns: 1fr 1fr; }
  .gallery-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
}
@media (max-width: 680px) {
  .nav-links {
    position: fixed;
    inset: 72px 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 12px 24px 20px;
    transform: translateY(-120%);
    transition: transform 320ms var(--ease-out);
    box-shadow: var(--shadow);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav-links a::after { display: none; }
  .nav-toggle { display: inline-flex; }
  .cards, .gallery-grid { grid-template-columns: 1fr; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-photo img, .card-media img, .gallery-item img { transition: none; }
  .toast, .lightbox, .lightbox img { transition: opacity 200ms ease; }
  .lightbox img { transform: none; }
}