/* =========================================================
   BARILOCHE PARAGLIDING — sistema de diseño
   Inspirado en el cielo de tormenta, la luz de atardecer
   sobre los cerros y el agua glaciar del Nahuel Huapi.
   ========================================================= */

:root {
  /* Color */
  --ink: #16242E;          /* cielo de tormenta — headers, footer, texto fuerte */
  --ink-soft: #233642;
  --paper: #F6F2EA;        /* crudo cálido — fondo de contenido */
  --paper-alt: #EFE8D8;
  --amber: #D98E3D;        /* luz de atardecer — CTA primario */
  --amber-dark: #B66F26;
  --glacier: #3E8E8C;      /* lago Nahuel Huapi — acento secundario */
  --glacier-dark: #2C6664;
  --charcoal: #23262B;     /* texto de cuerpo */
  --mist: #E2D9C6;         /* bordes, divisores, fondos de tarjeta */
  --white: #FFFDF9;

  /* Type */
  --font-display: "Unbounded", sans-serif;
  --font-body: "Work Sans", sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  /* Layout */
  --max-width: 1180px;
  --radius: 6px;
  --shadow-soft: 0 12px 30px -12px rgba(22, 36, 46, 0.35);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--charcoal);
  background: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--glacier-dark); text-decoration: none; }
a:hover { color: var(--amber-dark); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.1;
  margin: 0 0 0.5em;
  letter-spacing: 0.01em;
}

h1 { font-weight: 800; }
h2 { font-weight: 700; }
h3 { font-weight: 600; }

p { margin: 0 0 1em; }

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

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--glacier-dark);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--amber);
}

section.block {
  padding: 90px 0;
}

section.block.alt {
  background: var(--paper-alt);
}

section.block.dark {
  background: var(--ink);
  color: var(--mist);
}
section.block.dark h2, section.block.dark h3 { color: var(--white); }
section.block.dark p { color: #C7D2D6; }

.section-head {
  max-width: 640px;
  margin-bottom: 48px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 14px 26px;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--amber);
  color: var(--ink);
}
.btn-primary:hover { background: var(--amber-dark); color: var(--white); }

.btn-outline {
  border-color: rgba(246, 242, 234, 0.5);
  color: inherit;
}
.btn-outline:hover { border-color: var(--amber); color: var(--amber); }

.btn-ghost {
  border-color: var(--ink);
  color: var(--ink);
}
.btn-ghost:hover { background: var(--ink); color: var(--white); }

.btn-sm { padding: 10px 18px; font-size: 0.85rem; }

/* Reveal-on-scroll */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

/* =================== HEADER =================== */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  background: rgba(22, 36, 46, 0.0);
  transition: background 0.3s ease, padding 0.3s ease, box-shadow 0.3s ease;
}
#site-header.scrolled {
  background: rgba(22, 36, 46, 0.92);
  padding: 12px 28px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.25);
  backdrop-filter: blur(6px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
}
.brand img { height: 38px; width: 38px; border-radius: 50%; }

#main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
#main-nav a:not(.btn) {
  color: var(--white);
  font-size: 0.92rem;
  font-weight: 500;
  opacity: 0.88;
}
#main-nav a:not(.btn):hover { opacity: 1; color: var(--amber); }

.lang-switch {
  display: flex;
  gap: 8px;
  margin-right: 6px;
}
.lang-switch img {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0.65;
  border: 1px solid rgba(255,255,255,0.3);
  transition: opacity 0.2s, transform 0.2s;
}
.lang-switch img:hover { opacity: 1; transform: scale(1.1); }

#nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.6rem;
  cursor: pointer;
}

@media (max-width: 900px) {
  #main-nav {
    position: fixed;
    top: 0; right: 0;
    height: 100vh;
    width: min(78vw, 320px);
    background: var(--ink);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 40px;
    gap: 22px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }
  #main-nav.open { transform: translateX(0); }
  #nav-toggle { display: block; }
  .lang-switch { margin-top: 12px; margin-right: 0; }
}

/* =================== HERO =================== */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  background: linear-gradient(180deg, rgba(22,36,46,0.25) 0%, rgba(22,36,46,0.55) 55%, rgba(22,36,46,0.92) 100%), url('images/intro.webp') center 38% / cover no-repeat;
  color: var(--white);
}

@media (max-width: 760px) {
  #hero {
    background-image: linear-gradient(180deg, rgba(22,36,46,0.25) 0%, rgba(22,36,46,0.55) 55%, rgba(22,36,46,0.92) 100%), url('images/intro-mobile.webp');
    background-position: center top;
    background-size: cover;
  }
}
#hero .container {
  padding-bottom: 90px;
  padding-top: 160px;
  max-width: 880px;
}
#hero .eyebrow { color: var(--amber); }
#hero h1 {
  color: var(--white);
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  margin-bottom: 18px;
}
#hero p.lead {
  font-size: clamp(1rem, 1.6vw, 1.25rem);
  color: #DDE6E4;
  max-width: 560px;
  margin-bottom: 32px;
}
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; }
.scroll-cue {
  position: absolute;
  bottom: 24px; left: 50%;
  transform: translateX(-50%);
  width: 1px; height: 46px;
  background: rgba(255,255,255,0.5);
}
.scroll-cue::after {
  content: "";
  position: absolute;
  bottom: 0; left: -3px;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--amber);
  animation: cue 1.8s ease-in-out infinite;
}
@keyframes cue {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(-18px); opacity: 0.4; }
}
@media (prefers-reduced-motion: reduce) {
  .scroll-cue::after { animation: none; }
}

/* =================== STATS STRIP =================== */
#stats {
  background: var(--ink);
  color: var(--white);
  padding: 36px 0;
}
#stats .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
}
.stat {
  flex: 1 1 140px;
  text-align: center;
  position: relative;
}
.stat:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -12px; top: 10%;
  height: 80%; width: 1px;
  background: rgba(255,255,255,0.18);
}
.stat .num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--amber);
  display: block;
}
.stat .label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #B7C4C8;
}

/* =================== ABOUT =================== */
.about-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 56px;
  align-items: center;
}
.about-grid img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  aspect-ratio: 4/5;
  object-fit: cover;
  width: 100%;
}
.about-grid .since {
  font-family: var(--font-mono);
  color: var(--glacier-dark);
  font-size: 0.85rem;
  margin-bottom: 8px;
  display: block;
}
@media (max-width: 800px) {
  .about-grid { grid-template-columns: 1fr; gap: 30px; }
  .about-grid img { max-width: 320px; margin: 0 auto; }
}

/* =================== EXPERIENCES (altimeter + cards) =================== */
.experiences-layout {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 40px;
}

.altimeter {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.altimeter .rail {
  position: absolute;
  top: 6px; bottom: 6px;
  width: 2px;
  background: repeating-linear-gradient(to bottom, var(--mist) 0 6px, transparent 6px 12px);
}
.altimeter .tick {
  position: relative;
  z-index: 1;
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--glacier-dark);
  text-align: center;
  padding: 4px 0;
}
.altimeter .tick .dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--amber);
  margin: 0 auto 4px;
  border: 2px solid var(--paper);
}

.experience-cards {
  display: grid;
  gap: 24px;
}
.exp-card {
  background: var(--white);
  border: 1px solid var(--mist);
  border-radius: var(--radius);
  padding: 28px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: start;
}
.exp-card .alt-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--glacier-dark);
  background: rgba(62,142,140,0.1);
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}
.exp-card h3 { margin-bottom: 2px; }
.exp-card .kind {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--amber-dark);
  font-weight: 600;
  margin-bottom: 10px;
  display: block;
}
.exp-card p { color: #4A4F55; font-size: 0.95rem; margin-bottom: 14px; }
.exp-card .meta-row {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  align-items: center;
}
.exp-card .price {
  font-family: var(--font-mono);
  color: var(--ink);
  font-weight: 600;
}
.exp-card .price small { color: #8a8f95; font-weight: 400; }

@media (max-width: 760px) {
  .experiences-layout { grid-template-columns: 1fr; }
  .altimeter { flex-direction: row; justify-content: space-between; padding: 0 10px; }
  .altimeter .rail { top: 50%; left: 0; right: 0; bottom: auto; width: auto; height: 2px; background: repeating-linear-gradient(to right, var(--mist) 0 6px, transparent 6px 12px); }
  .exp-card { grid-template-columns: 1fr; }
}

/* =================== COURSES =================== */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.course-card {
  background: var(--ink);
  color: var(--mist);
  border-radius: var(--radius);
  padding: 32px;
  position: relative;
  overflow: hidden;
}
.course-card::before {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 140px; height: 140px;
  background: radial-gradient(circle at top right, rgba(217,142,61,0.25), transparent 70%);
}
.course-card .place {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.course-card h3 { color: var(--white); margin-top: 6px; }
.course-card .next-date {
  font-size: 0.85rem;
  color: #9FB3B8;
  margin-bottom: 14px;
}
.course-card .price-tag {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  color: var(--white);
  display: block;
  margin: 16px 0;
}
.course-card .price-tag small { font-size: 0.7rem; color: #8FA0A4; display: block; font-family: var(--font-body); }

@media (max-width: 760px) {
  .courses-grid { grid-template-columns: 1fr; }
}

/* =================== VIDEOS (Galería) =================== */
.video-section {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  padding: 20px 24px 80px;
  max-width: var(--max-width);
  margin: 0 auto;
}
.video-wrap {
  position: relative;
  width: 100%;
  max-width: 660px;
  aspect-ratio: 16 / 9;
}
.video-wrap iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: 0;
  border-radius: var(--radius);
}

/* =================== GALLERY PREVIEW =================== */
.gallery-preview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.gallery-preview-grid a {
  display: block;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: var(--radius);
}
.gallery-preview-grid img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.gallery-preview-grid a:hover img { transform: scale(1.07); }
@media (max-width: 700px) {
  .gallery-preview-grid { grid-template-columns: repeat(2, 1fr); }
}

/* =================== CONTACT =================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
}
.field { margin-bottom: 18px; display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 0.82rem; font-weight: 600; color: var(--ink); }
.field input, .field textarea {
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 12px 14px;
  border: 1px solid var(--mist);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--charcoal);
  resize: vertical;
}
.field input:focus, .field textarea:focus {
  outline: 2px solid var(--glacier);
  outline-offset: 1px;
}
.fields-row { display: flex; gap: 16px; flex-wrap: wrap; }
.fields-row .field { flex: 1 1 200px; }

.contact-info-list { list-style: none; margin: 0; padding: 0; }
.contact-info-list > li {
  padding: 18px 0;
  border-bottom: 1px solid var(--mist);
}
.contact-info-list h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--glacier-dark);
  margin-bottom: 6px;
}
.social-row { display: flex; gap: 14px; margin-top: 6px; }
.social-row a {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--mist);
  display: flex; align-items: center; justify-content: center;
  color: var(--ink);
  transition: transform 0.15s ease;
}
.social-row a:hover { transform: translateY(-2px); }

.social-row a[aria-label="YouTube"] { color: #FF0000; border-color: #FF0000; }
.social-row a[aria-label="Facebook"] { color: #1877F2; border-color: #1877F2; }
.social-row a[aria-label="Instagram"] { color: #E1306C; border-color: #E1306C; }

.social-row a[aria-label="YouTube"]:hover { background: #FF0000; color: #fff; }
.social-row a[aria-label="Facebook"]:hover { background: #1877F2; color: #fff; }
.social-row a[aria-label="Instagram"]:hover { background: #E1306C; color: #fff; }

@media (max-width: 800px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* =================== FOOTER =================== */
#site-footer {
  background: var(--ink);
  color: #B7C4C8;
  padding: 64px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 48px;
}
.footer-grid h4 {
  color: var(--white);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  font-family: var(--font-body);
  font-weight: 700;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 10px; }
.footer-grid a { color: #B7C4C8; font-size: 0.9rem; }
.footer-grid a:hover { color: var(--amber); }
.footer-brand img { height: 44px; margin-bottom: 14px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 22px;
  font-size: 0.8rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  color: #8FA0A4;
}
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
}