/* =========================
   ACASTRO.DEV — Styles
   ========================= */

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

html {
  scroll-behavior: smooth;
  overscroll-behavior-x: none;
  font-size: 100%;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  font-size: var(--fs-body);
  line-height: 1.5;

  overscroll-behavior-x: none;
  overflow-x: hidden;
  touch-action: pan-y;
}

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

a { color: inherit; text-decoration: none; }
ul { list-style: none; padding: 0; margin: 0; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* =========================
   Tema por variables
   ========================= */
:root{
  /* layout */
  --container: 1500px;
  --radius: 10px;

  /* dark */
  --bg: #0c0c0f;
  --bg2: #1a1a1f;
  --text: #e7eef7;
  --muted: rgba(231,238,247,.72);

  --card: rgba(255,255,255,.06);
  --card2: rgba(255,255,255,.08);
  --border: rgba(255,255,255,.12);

  --shadow: 0 18px 60px rgba(0,0,0,.45);

  --accent: #2dd4ff;
  --accent2:#0ea5e9;
  --accentShadow:rgba(45,212,255,.6);

  --btnText: #06121c;
  --glass: rgba(255,255,255,.06);
  --glassBorder: rgba(255,255,255,.12);

  /* Fondo global (dark) */
  --bg-image:
  linear-gradient(rgba(0,0,0,.25), rgba(0,0,0,.35)),
  url("../images/dark-background.webp");

  /* =========================
    Breakpoints responsive
    =========================
    Base: móvil pequeño / 360px

    390px  → móvil grande
    430px  → móvil muy grande
    768px  → tablet
    1024px → tablet horizontal / portátil pequeño
    1280px → desktop real
    1440px → desktop grande
  */

  /* Móvil pequeño */

  --fs-body: .92rem;
  --fs-small: .82rem;
  --fs-normal: 1rem;
  --fs-nav: 1rem;
  --fs-button: 1rem;
  --fs-hero-desc: 1rem;
  --fs-section-title: clamp(1.55rem, 7vw, 2rem);
  --fs-card-title: 1.1rem;
  --fs-project-title: 1.25rem;
  --fs-project-text: .92rem;
  --fs-chip: .82rem;
  --fs-label: .95rem;

  --space-section: 3rem;
  --space-section-header: 1.25rem;
  --space-content-top: 1rem;
  --space-card: .9rem;
  --space-card-gap: .9rem;
  --space-inner: .65rem;
  --space-button-y: .75rem;
  --space-button-x: 1.25rem;
  --space-chip-y: .45rem;
  --space-chip-x: .65rem;

  --fs-project-text: .86rem;
  --fs-project-mini: .85rem;
  --fs-project-chip: .75rem;

  --space-project-text: .55rem;
  --space-project-list: .25rem;

  --fs-contact-label: 1rem;
  --fs-contact-input: 1rem;

  --space-contact-field: .5rem;
  --space-contact-input-y: .45rem;
  --space-contact-input-x: .65rem;
}

/* Móvil grande */
@media (min-width: 390px){
  :root{
    --fs-body: .95rem;
    --fs-section-title: clamp(1.65rem, 6vw, 2.1rem);
    --fs-project-title: 1.32rem;
    --fs-project-text: .95rem;
    --fs-chip: .85rem;

    --space-section: 3.5rem;
    --space-section-header: 1.5rem;
    --space-card: 1rem;
    --space-card-gap: 1rem;
    --space-inner: .75rem;
    --space-chip-y: .5rem;
    --space-chip-x: .7rem;
  }
}

/* Móvil muy grande */
@media (min-width: 430px){
  :root{
    --fs-body: 1rem;
    --fs-section-title: clamp(1.7rem, 5.5vw, 2.15rem);

    --space-section: 3.75rem;
  }
}

/* Tablet */
@media (min-width: 768px){
  :root{
    --fs-section-title: clamp(1.9rem, 4vw, 2.3rem);
    --fs-project-title: 1.5rem;
    --fs-project-text: 1rem;
    --fs-chip: .9rem;

    --space-section: 4.5rem;
    --space-card: 1.1rem;
    --space-card-gap: 1.1rem;
    --space-inner: .85rem;
  }
}

/* Tablet horizontal / portátil pequeño */
@media (min-width: 1024px){
  :root{
    --fs-body: 1rem;
    --fs-nav: 1.15rem;
    --fs-button: 1.1rem;
    --fs-hero-desc: 1.1rem;
    --fs-section-title: clamp(1.7rem, 3vw, 2.2rem);
    --fs-card-title: 1.2rem;
    --fs-project-title: 1.5rem;
    --fs-project-text: .95rem;
    --fs-chip: .95rem;

    --space-section: 5rem;
    --space-section-header: 1.5rem;
    --space-card: 1.125rem;
    --space-card-gap: 1.125rem;
    --space-inner: .75rem;
    --space-chip-y: .6rem;
    --space-chip-x: .8rem;
  }
}

/* Desktop real */
@media (min-width: 1280px){
  :root{
    --fs-nav: 1.25rem;
    --fs-button: 1.2rem;
    --fs-hero-desc: 1.2rem;
    --fs-project-title: 1.6rem;
    --fs-project-text: 1rem;
    --fs-chip: 1rem;

    --space-section: 5.625rem;
    --space-card-gap: 1.25rem;
  }
}

/* Desktop grande */
@media (min-width: 1440px){
  :root{
    --fs-nav: 1.3rem;
    --fs-button: 1.25rem;
    --fs-hero-desc: 1.25rem;

    --space-section: 6rem;
  }
}

html[data-theme="light"]{
  --bg: #f6f8fb;
  --bg2: #eef2f7;
  --text: #1f1f1f;
  --muted: rgba(15,23,42,.7);

  --shadow: 0 18px 60px rgba(15,23,42,.10);

  --accent: #ffffff;
  --accent2:#2563eb;
  --accentShadow:rgba(40, 41, 41, 0.8);

  --btnText: #ffffff;
  --glass: rgba(255,255,255,.72);
  --glassBorder: rgba(15,23,42,.10);

  /* Fondo global (light) */
  --bg-image:
    url("../images/light-background.webp"),
    radial-gradient(900px 600px at 70% 20%, rgba(45,212,255,.06), transparent 70%),
    linear-gradient(180deg, rgba(246,248,251,.35), rgba(238,242,247,.55));
}

:root{ color-scheme: dark; }
html[data-theme="light"]{ color-scheme: light; }

/* Fondo global */
body{
  position: relative;
  background: var(--bg-image);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--text);
  z-index: 0;
}

/* Importante: el contenido debe ir por encima */
.site-header,
main,
footer{
  position: relative;
  z-index: 1;
}

/* =========================
   Accesibilidad
   ========================= */
/* Skip link */
.skip-link{
  position: fixed;
  left: 12px;
  top: -100px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  z-index: 9999;
}
.skip-link:focus{ top: 50px; left: 10px;}

/* =========================
   Header / Nav
   ========================= */
.site-header{
  position: sticky;
  top: 0;
  z-index: 1000;

  width: 100%;
  margin: 0;
  border-radius: 0;

  background: linear-gradient(
      rgba(255,255,255,.10),
      rgba(255,255,255,.02)
    ),
    rgba(20,20,25,.55);

  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);

  border-bottom: 1px solid rgba(255,255,255,.12);

  box-shadow:
    0 20px 60px rgba(0,0,0,.45),
    0 0 0 1px rgba(255,255,255,.04);

  overflow: visible;
}

/* Desktop */
@media (min-width: 1024px){
  .site-header{
    width: min(1600px, calc(100% - 60px));
    margin: 40px auto 0;
    border-radius: 8px 8px 0 0;

    border: 2px solid rgba(255,255,255,.10);
    border-top: none;

    overflow: hidden;
  }
}

.header-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 72px;
}

.brand{
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-logo{
  height: 30px;
  width: auto;
}

/* Menú móvil por defecto */
.site-nav{
  position: absolute;
  top: calc(100% + 10px);
  left: 16px;
  right: 16px;
  z-index: 2000;

  display: none;

  margin: 0;
  padding: 12px;

  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.16);

  background:
    linear-gradient(
      rgba(255,255,255,.08),
      rgba(255,255,255,.03)
    ),
    rgba(12,16,24,.92);

  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);

  box-shadow:
    0 20px 60px rgba(0,0,0,.65),
    inset 0 1px 0 rgba(255,255,255,.08);
}

.site-nav.is-open{
  display: block;
}

.nav-list{
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: stretch;
  font-size: var(--fs-nav);
}

.nav-link{
  display: block;
  padding: 12px;
  color: var(--muted);
  border-radius: 12px;
  transition: background .2s ease, color .2s ease;
}

.nav-link:hover{
  color: var(--accent);
}

.nav-link.is-active{
  color: var(--text);
  position: relative;
}

.nav-link.is-active::after{
  content:"";
  position:absolute;
  left: 12px;
  right: 12px;
  bottom: 5px;
  height: 2px;
  background: var(--accent);
  border-radius: 999px;
  opacity: .85;
}

.header-actions{
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Toggle tema */
.theme-toggle{
  display: inline-flex;
  align-items: center;
  gap: 8px;

  padding: 10px;
  border-radius: 14px;
  border: 1px solid var(--border);

  background: var(--card);
  color: var(--text);

  cursor: pointer;
  box-shadow: 0 10px 25px rgba(0,0,0,.15);
}

.theme-label{
  display: none;
}

.theme-switch{
  width: 34px;
  height: 22px;
  border-radius: 999px;
  background: rgba(255,255,255,.12);
  border: 1px solid var(--border);
  position: relative;
}

.theme-switch::after{
  content:"";
  position: absolute;
  top: 50%;
  left: 3px;

  width: 16px;
  height: 16px;
  border-radius: 999px;

  transform: translateY(-50%);
  background: var(--accent);
  transition: left .18s ease;
}

html[data-theme="light"] .theme-switch::after{
  left: 14px;
}

/* Botón hamburguesa visible en móvil */
.nav-toggle{
  display: inline-flex;
  flex-direction: column;
  justify-content: center;

  width: 44px;
  height: 44px;

  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--card);

  cursor: pointer;
  padding: 10px;
}

.nav-toggle span{
  display: block;
  width: 22px;
  height: 2px;
  background: rgba(255,255,255,.9);
  border-radius: 999px;
  margin: 3px auto;
  opacity: .95;
  transition: transform .2s ease, opacity .2s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1){
  transform: translateY(8px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2){
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3){
  transform: translateY(-8px) rotate(-45deg);
}

/* Desktop */
@media (min-width: 1024px){
  .header-inner{
    min-height: 74px;
  }

  .brand-logo{
    height: 34px;
  }

  .site-nav{
    position: static;
    display: block;
    margin-left: auto;
    padding: 0;
    border: none;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: none;
  }

  .nav-list{
    flex-direction: row;
    align-items: center;
    gap: 18px;
    font-size: var(--fs-nav);
  }

  .nav-link{
    padding: 10px;
  }

  .theme-toggle{
    padding: 10px 12px;
  }

  .theme-label{
    display: inline;
    font-size: var(--fs-label);
    color: var(--muted);
  }

  .theme-switch{
    width: 44px;
    height: 24px;
  }

  .theme-switch::after{
    width: 18px;
    height: 18px;
  }

  html[data-theme="light"] .theme-switch::after{
    left: 22px;
  }

  .nav-toggle{
    display: none;
  }
}

/* =========================
   CONTENT
   ========================= */
.cristal-wrapper{
  width: 100%;
  margin: 0;
  border-radius: 0;

  background: linear-gradient(
      rgba(255,255,255,.04),
      rgba(255,255,255,.02)
    ),
    rgba(20,20,25,.28);

  backdrop-filter: blur(1px);
  -webkit-backdrop-filter: blur(1px);

  border: none;
  box-shadow: none;

  overflow: hidden;
}

/* Desktop */
@media (min-width: 1024px){
  .cristal-wrapper{
    width: min(1600px, calc(100% - 60px));
    margin: 0 auto 40px;
    border-radius: 0 0 8px 8px;

    border: 2px solid rgba(255,255,255,.10);
    border-top: none;

    box-shadow:
      0 40px 120px rgba(0,0,0,.60),
      0 0 0 1px rgba(255,255,255,.07);
  }
}

.container{
  width: min(100% - 32px, var(--container));
  margin-inline: auto;
}

/* Desktop */
@media (min-width: 1024px){
  .container{
    width: min(var(--container), calc(100% - 190px));
    margin-left: 150px;
    margin-right: auto;
  }
}

.section{
  padding: var(--space-content-top) 0 var(--space-section);
}

main section[id],
#proyectos .project-card{
  scroll-margin-top: 90px;
}

/* Desktop */
@media (min-width: 1024px){
  .section{
    padding: var(--space-section) 0;
  }
}

.section-header{
  margin-bottom: var(--space-section-header);
}

.section-title{
  margin: 0 0 .5rem;
  font-size: var(--fs-section-title);
  letter-spacing: -0.02em;
}

.section-subtitle{
  margin: 0;
  color: var(--muted);
  max-width: 70ch;
  font-size: var(--fs-normal);
}

.btn-primary{
  padding: var(--space-button-y) var(--space-button-x);
  border-radius: var(--radius);
  font-weight: 700;

  color: var(--text);

  background:
    linear-gradient(
      to top right,
      rgba(45,212,255,.30),
      rgba(45,212,255,.28),
      rgba(45,212,255,.25),
      rgba(45,212,255,.20),
      rgba(45,212,255,.10),
      rgba(45,212,255,.05),
      rgba(45,212,255,.01),
      rgba(45,212,255,.00),
      rgba(45,212,255,.00)
    );

  border: 1px solid rgba(45,212,255,.35);

  backdrop-filter: blur(1px);
  -webkit-backdrop-filter: blur(1px);

  box-shadow:
    0 10px 30px rgba(0,0,0,.35),
    inset 0 1px 0 rgba(255,255,255,.15);
}

.btn-primary:hover {
  border-color: rgba(45,212,255,.55);

  background:
    linear-gradient(
      to top right,
      rgba(45,212,255,.40),
      rgba(45,212,255,.35),
      rgba(45,212,255,.25),
      rgba(45,212,255,.15),
      rgba(45,212,255,.05),
      rgba(45,212,255,.00)
    );

  box-shadow:
    0 15px 40px rgba(0,0,0,.45),
    0 0 25px rgba(45,212,255,.25),
    inset 0 1px 0 rgba(255,255,255,.20);

  transform: translateY(-2px);
  transition: all .2s ease;
}

.btn-glass{
  padding: var(--space-button-y) var(--space-button-x);
  border-radius: var(--radius);
  font-weight: 700;

  color: var(--text);

  border: 1px solid rgba(45,212,255,.05);

  backdrop-filter: blur(1px);
  -webkit-backdrop-filter: blur(1px);

  box-shadow:
    0 10px 30px rgba(0,0,0,.35),
    inset 0 1px 0 rgba(255,255,255,.15);
}

.btn-glass:hover {
  border-color: rgba(45,212,255,.55);

  background:
    linear-gradient(
      to top right,
      rgba(45,212,255,.10),
      rgba(45,212,255,.00)
    );

  box-shadow:
    0 15px 40px rgba(0,0,0,.45),
    0 0 25px rgba(45,212,255,.25),
    inset 0 1px 0 rgba(255,255,255,.20);

  transform: translateY(-2px);
  transition: all .2s ease;
}

/* =========================
   Hero
   ========================= */
.hero{
  position: relative;
  min-height: calc(100svh - 72px);
  display: flex;
  align-items: flex-start;
  padding: var(--space-content-top) 0 4rem;
  overflow: hidden;
}

.hero-grid{
  position: relative;
  z-index: 3;

  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;

  text-align: center;
}

.hero-left{
  position: relative;
  z-index: 4;

  width: 100%;
}

.hero-left h1{
  font-size: clamp(2.8rem, 13vw, 4.4rem);
  line-height: .95;
  margin: 0 0 18px;
  letter-spacing: -0.04em;
}

.accent{
  color: var(--accent);
  text-shadow: 0 0 20px var(--accentShadow);
}

.hero-desc{
  max-width: 34rem;
  margin: 0 auto;
  font-size: var(--fs-hero-desc);
  color: rgba(255,255,255,.75);
}

/* Desktop */
@media (min-width: 1024px){
  .hero{
    min-height: 100vh;
    align-items: flex-start;
    padding-top: 100px;
  }

  .hero-grid{
    display: block;
    text-align: left;
  }

  .hero-left h1{
    font-size: clamp(3.5rem, 6vw, 4.5rem);
    margin-bottom: 40px;
  }

  .hero-desc{
    max-width: 800px;
    margin: 0;
    font-size: var(--fs-hero-desc);
  }
}

/* Botones */
.hero-buttons{
  display: flex;
  flex-direction: column;
  gap: 12px;

  width: min(100%, 320px);
  margin: 24px auto 0;

  font-size: var(--fs-button);
  font-weight: 700;
}

/* Estilo común para botones con icono */
.btn-primary,
.btn-glass{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;

  width: 100%;
  min-height: 48px;
}

.btn-primary > svg,
.btn-glass > svg{
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
  fill: currentColor;
  opacity: .95;
  display: block;
}

.btn-primary > span,
.btn-glass > span{
  display: inline-flex;
  align-items: center;
}

/* Stats glass */
.hero-stats-glass{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;

  width: min(100%, 360px);
  margin: 22px auto 0;
  padding: 14px 8px;

  border-radius: var(--radius);
  border: 1px solid rgba(45,212,255,.12);

  backdrop-filter: blur(1px);
  -webkit-backdrop-filter: blur(1px);

  box-shadow:
    0 10px 30px rgba(0,0,0,.35),
    inset 0 1px 0 rgba(255,255,255,.15);
}

.hero-stats-glass > div{
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;

  min-width: 0;
  padding: 0 6px;
  text-align: center;
}

.hero-stats-glass > div:not(:first-child){
  position: relative;
}

.hero-stats-glass > div:not(:first-child)::before{
  content:"";
  position: absolute;
  left: 0;
  top: 10%;
  width: 1px;
  height: 80%;
  background: rgba(255,255,255,.18);
}

.hero-stats-glass > div svg{
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
  fill: var(--accent);
  opacity: .9;
}

.hero-stats-glass strong{
  font-size: 1.1rem;
  line-height: 1;
  color: var(--text);
}

.hero-stats-glass span{
  font-size: .72rem;
  font-weight: 700;
  color: var(--text);
  opacity: .7;
  line-height: 1.1;
}

/* Desktop */
@media (min-width: 1024px){
  .hero-buttons{
    flex-direction: row;
    gap: 50px;

    width: auto;
    margin: 25px 0;

    font-size: var(--fs-button);
  }

  .btn-primary,
  .btn-glass{
    width: auto;
    min-height: auto;
    justify-content: flex-start;
  }

  .btn-primary > svg,
  .btn-glass > svg{
    width: 30px;
    height: 30px;
  }

  .hero-stats-glass{
    display: inline-flex;
    gap: 50px;

    width: auto;
    margin: 20px 0 0;
    padding: 18px 25px;
  }

  .hero-stats-glass > div{
    flex-direction: row;
    gap: 10px;
    padding: 0;
    text-align: left;
  }

  .hero-stats-glass > div:not(:first-child)::before{
    left: -25px;
    top: 50%;
    transform: translateY(-50%);
    height: 150%;
  }

  .hero-stats-glass > div svg{
    width: 30px;
    height: 30px;
  }

  .hero-stats-glass strong,
  .hero-stats-glass span{
    font-size: 1.2rem;
  }

  .hero-stats-glass span{
    white-space: nowrap;
  }
}

/* FOTO */
.hero-right{
  position: relative;
  order: -1;

  width: min(78vw, 320px);
  margin: 0 auto -200px;

  z-index: 2;
  pointer-events: none;
}

.hero-photo{
  position: relative;
  width: 100%;
  max-width: 320px;
  z-index: 2;

  -webkit-mask-image: linear-gradient(
    to bottom,
    black 68%,
    transparent 100%
  );

  mask-image: linear-gradient(
    to bottom,
    black 68%,
    transparent 100%
  );
}

/* Marco neón */
.neon-frame{
  position: absolute;
  left: 50%;
  top: 22%;

  width: 82%;
  height: 42%;

  border-radius: 25px;
  border: 2px solid #ffffff;
  border-bottom: none;

  box-shadow:
    0 -10px 20px rgba(45,212,255,.6),
    0 -10px 40px rgba(45,212,255,.3),
    inset 0 10px 20px rgba(45,212,255,.5),
    inset 0 10px 40px rgba(45,212,255,.25);

  z-index: 1;
  transform: translateX(-50%);
}

/* Desktop */
@media (min-width: 1024px){
  .hero-right{
    position: absolute;
    order: initial;

    right: 5%;
    bottom: clamp(-220px, calc(96px - 23vw), -140px);

    width: auto;
    margin: 0;

    z-index: 1;
    pointer-events: none;
  }

  .hero-photo{
    width: clamp(360px, 35vw, 480px);
    max-width: none;
    z-index: 2;

    -webkit-mask-image: linear-gradient(
      to bottom,
      black 60%,
      transparent 100%
    );

    mask-image: linear-gradient(
      to bottom,
      black 60%,
      transparent 100%
    );
  }

  .neon-frame{
    left: auto;
    top: auto;

    width: clamp(285px, 27.7vw, 380px);
    height: clamp(263px, 25.5vw, 350px);

    transform: translate(
      clamp(38px, 3.7vw, 50px),
      clamp(75px, 7.3vw, 100px)
    );
  }
}

/* =========================
   Cards / Conocimientos
   ========================= */

.knowledge-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-card-gap);
  margin-top: var(--space-card-gap);
}

.card{
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card2) 88%, transparent);
  box-shadow: var(--shadow);

  padding: var(--space-card);

  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}

.card:hover{
  transform: translateY(-2px);
  border-color: rgba(45,212,255,.35);
  box-shadow: 0 26px 80px rgba(0,0,0,.30);
}

.card-title{
  margin: 0;

  display: flex;
  align-items: center;
  gap: .65rem;

  font-size: var(--fs-card-title);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);

  cursor: pointer;
  user-select: none;
}

.card-title::after{
  content: "";
  margin-left: auto;

  width: 10px;
  height: 10px;

  border-right: 2px solid var(--text);
  border-bottom: 2px solid var(--text);

  opacity: .85;

  transform: rotate(-135deg); /* abierta = flecha arriba */
  transition: transform .2s ease, opacity .2s ease;
}

.contact-aside .card-title::after{
  display: none;
}

.card.is-collapsed .card-title::after{
  transform: rotate(45deg); /* cerrada = flecha abajo */
}

.card.is-collapsed .card-grid{
  max-height: 0;
  opacity: 0;
  margin-top: 0;
  pointer-events: none;
}

.card-title > svg{
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  color: var(--accent);
}

.card-title > svg,
.card-title > svg *{
  fill: currentColor;
  stroke: currentColor;
}

.card-grid{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-card-gap);

  margin-top: var(--space-card-gap);
  max-height: 700px;
  opacity: 1;
  overflow: hidden;

  transition:
    max-height .35s ease,
    opacity .25s ease,
    margin-top .35s ease;
}

.item-card{
  display: flex;
  align-items: center;
  gap: .5rem;

  width: 100%;
  min-width: 0;
  padding: var(--space-chip-y) var(--space-chip-x);
  border-radius: 1.125rem;

  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);

  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);

  transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}

.item-card svg{
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  opacity: .95;
}

.item-card span{
  font-size: var(--fs-chip);
  font-weight: 600;
  opacity: .95;
}

.item-card:hover{
  transform: translateY(-2px);
  border-color: rgba(45,212,255,.35);
  box-shadow: 0 0 0 1px rgba(45,212,255,.12), 0 10px 30px rgba(0,0,0,.35);
}

/* Tablet */
@media (min-width: 768px){
  .knowledge-grid{
    grid-template-columns: 1fr;
  }

  #conocimientos .card-title{
    cursor: default;
  }

  #conocimientos .card-title::after{
    display: none;
  }

  #conocimientos .card.is-collapsed .card-grid{
    max-height: none;
    opacity: 1;
    margin-top: var(--space-card-gap);
    pointer-events: auto;
  }

  #conocimientos .card-grid{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* Desktop */
@media (min-width: 1024px){
  .knowledge-grid{
    gap: var(--space-card-gap);
  }

  .card{
    padding: var(--space-card);
  }

  .card-title{
    margin-bottom: 20px;
    font-size: var(--fs-card-title);
    cursor: default;
  }

  .card-title::after{
    display: none;
  }

  .card.is-collapsed .card-grid{
    display: flex;
  }

  .card-title > svg{
    width: 30px;
    height: 30px;
  }

  .card-grid{
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-card-gap);
  }

  .item-card{
    width: auto;
    min-width: 0;
    flex: 0 0 auto;
    gap: .5rem;
    padding: var(--space-chip-y) var(--space-chip-x);
    border-radius: 1.125rem;
  }

  .item-card span{
    font-size: var(--fs-chip);
  }
}

/* =========================
   Proyectos
========================= */

#proyectos .section-subtitle{
  display: none;
}

.project-card{
  display: grid;
  grid-template-columns: 1fr;
  grid-template-areas:
    "title"
    "media"
    "info";
  gap: var(--space-card-gap);

  border-radius: calc(var(--radius) + 4px);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card) 90%, transparent);
  box-shadow: var(--shadow);

  padding: var(--space-card);
  margin-top: var(--space-card-gap);
}

.project-media{
  grid-area: media;

  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  padding: var(--space-inner);
}

.project-carousel{
  position: relative;
  overflow: hidden;
  border-radius: 14px;
}

.carousel-dots{
  position: absolute;
  left: 50%;
  bottom: 0;
  z-index: 6;

  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;

  transform: translateX(-50%);

  padding: 6px 8px;
  border-radius: 999px;

  background: rgba(10,14,22,.45);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.carousel-dot{
  width: 8px;
  height: 8px;

  border: 0;
  border-radius: 999px;

  background: rgba(255,255,255,.45);
  cursor: pointer;

  padding: 0;

  transition: background .2s ease;
}

.carousel-dot.is-active{
  background: var(--accent);
}

.project-main{
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  display: block;
}

.project-thumbs{
  display: none;
}

.thumb{
  flex: 0 0 72px;

  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  border-radius: 12px;
  padding: 6px;

  cursor: pointer;
  transition: transform .12s ease, border-color .12s ease;
}

.thumb:hover{
  transform: translateY(-1px);
  border-color: rgba(45,212,255,.35);
}

.thumb img{
  border-radius: 8px;
  width: 100%;
  height: 42px;
  object-fit: cover;
  display: block;
}

.project-info{
  grid-area: info;

  padding: .25rem .125rem .125rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-title{
  grid-area: title;

  margin: 0 0 var(--space-project-text);
  font-size: var(--fs-project-title);
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.project-lead{
  margin: 0 0 var(--space-project-text);
  color: var(--muted);
  font-size: var(--fs-project-text);
  line-height: 1.35;
}

.project-bullets{
  margin: 0 0 .7rem;
  padding-left: 1rem;
  color: var(--muted);
  font-size: var(--fs-project-text);
  line-height: 1.3;

  list-style: disc;
}

.project-bullets li{
  margin: var(--space-project-list) 0;
  display: list-item;
}

.project-bullets li::marker{
  color: currentColor;
}

.mini-title{
  margin: 0 0 .75rem;
  font-size: var(--fs-project-mini);
  color: var(--text);
}

.project-info .mini-title{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;

  cursor: pointer;
  user-select: none;
}

.project-info .mini-title::after{
  content: "";

  width: .55rem;
  height: .55rem;

  border-right: 2px solid var(--text);
  border-bottom: 2px solid var(--text);

  opacity: .85;
  transform: rotate(45deg);
  transition: transform .2s ease;
}

.project-info .mini-title.is-open::after{
  transform: rotate(-135deg);
}

.tech-chips{
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;

  margin-bottom: .75rem;
  max-height: 8rem;
  opacity: 1;
  overflow: hidden;

  transition:
    max-height .3s ease,
    opacity .2s ease,
    margin-bottom .3s ease;
}

.tech-chips.is-collapsed{
  max-height: 0;
  opacity: 0;
  margin-bottom: 0;
  pointer-events: none;
}

.tech-chips .item-card{
  width: auto;
  min-width: 0;
  flex: 0 0 auto;

  padding: .32rem .55rem;
  border-radius: .85rem;
}

.tech-chips .item-card svg{
  width: 1rem;
  height: 1rem;
}

.tech-chips .item-card span{
  font-size: var(--fs-project-chip);
}

.project-actions{
  display: flex;
  flex-direction: column;
  gap: var(--space-card-gap);
  margin-top: auto;
}

.project-actions .btn-primary,
.project-actions .btn-glass{
  width: 100%;
}

/* Tablet */
@media (min-width: 768px){
  .project-card{
    grid-template-columns: 1fr;
    grid-template-areas:
      "title"
      "media"
      "info";
  }

  .project-media{
    display: grid;
    grid-template-columns: minmax(0, 1fr) 68px;
    gap: .5rem;
    align-items: start;
  }

  .project-carousel{
    min-width: 0;
  }

  .carousel-dots{
    display: none;
  }

  .project-thumbs{
    display: grid;
    grid-template-columns: 1fr;
    align-content: start;
    gap: .35rem;
  }

  .thumb{
    flex: initial;
    width: 100%;
    padding: .25rem;
  }

  .thumb img{
    width: 100%;
    height: auto;
    object-fit: contain;
  }

  .project-info .mini-title{
    cursor: default;
  }

  .project-info .mini-title::after{
    display: none;
  }

  .tech-chips.is-collapsed{
    max-height: none;
    opacity: 1;
    margin-bottom: .75rem;
    pointer-events: auto;
  }

  .project-actions{
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: flex-end;
    margin-top: 1rem;
  }

  .project-actions .btn-primary,
  .project-actions .btn-glass{
    width: auto;
  }
}

/* Desktop */
@media (min-width: 1024px){

  #proyectos .section-subtitle{
    display: block;
  }

  .project-media{
    display: block;
  }

  .carousel-dots{
    display: none;
  }

  .project-card{
    grid-template-columns: 1.05fr .95fr;
    grid-template-areas:
      "media title"
      "media info";
    gap: var(--space-card-gap);
    padding: var(--space-card);
  }

  .project-media{
    padding: var(--space-inner);
  }

  .project-thumbs{
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    overflow: visible;
    padding-bottom: 0;
  }

  .thumb{
    flex: initial;
  }

  .project-info{
    padding: .25rem .125rem .125rem;
  }

  .project-title{
    font-size: var(--fs-project-title);
  }

  .project-lead{
    font-size: var(--fs-project-text);
  }

  .project-bullets{
    font-size: var(--fs-project-text);
  }

  .project-actions{
    flex-direction: row;
    flex-wrap: wrap;
  }

  .project-actions .btn-primary,
  .project-actions .btn-glass{
    width: auto;
  }

  .project-info .mini-title{
  cursor: default;
}

.project-info .mini-title::after{
  display: none;
}

.tech-chips.is-collapsed{
  max-height: none;
  opacity: 1;
  margin-bottom: .75rem;
  pointer-events: auto;
}
}

/* =========================
   Contacto
   ========================= */
.contact-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-card-gap);
  margin-top: var(--space-card-gap);
}

.contact-form{
  position: relative;

  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card) 92%, transparent);
  box-shadow: var(--shadow);

  padding: var(--space-card);
}

/* Labels ocultos visualmente en móvil, pero accesibles */
.contact-form label{
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.field{
  display: grid;
  gap: 0;
  margin-bottom: .55rem;
}

input,
textarea{
  width: 100%;
  padding: .55rem .7rem;
  border-radius: .75rem;
  border: 1px solid var(--border);

  background: rgba(255,255,255,.04);
  color: var(--text);

  font-size: .85rem;
  line-height: 1.25;

  transition: border-color .15s ease, box-shadow .15s ease, background .15s ease;
}

input::placeholder,
textarea::placeholder{
  color: var(--muted);
  opacity: .8;
}

textarea{
  resize: vertical;
}

html[data-theme="light"] input,
html[data-theme="light"] textarea{
  background: rgba(15,23,42,.03);
}

input:focus,
textarea:focus{
  outline: none;
  border-color: rgba(45,212,255,.55);
  box-shadow: 0 0 0 4px rgba(45,212,255,.12);
}

.contact-form .btn-primary{
  width: 100%;
}

.form-hint{
  margin: 10px 0 0;
  color: var(--muted);
  font-size: var(--fs-small);
}

.hp-field{
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
}

.form-toast{
  position: fixed;
  left: 16px;
  right: 16px;
  bottom: 16px;
  z-index: 9999;

  padding: 14px 16px;
  border-radius: 14px;

  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card2) 92%, transparent);

  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);

  color: var(--text);
  box-shadow: var(--shadow);

  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;

  transition: opacity .25s ease, transform .25s ease;
}

.form-toast.is-visible{
  opacity: 1;
  transform: translateY(0);
}

.form-toast.is-success{
  border-color: rgba(34,197,94,.35);
}

.form-toast.is-error{
  border-color: rgba(239,68,68,.35);
}

.contact-aside .card + .card{
  margin-top: var(--space-card-gap);
}

.link-list{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .5rem;
  margin-top: .75rem;
}

.link-list a{
  display: flex;
  align-items: center;
  justify-content: center;

  color: var(--text);
  padding: .65rem;
  border-radius: var(--radius);

  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);

  transition: transform .12s ease, border-color .12s ease;
}

.link-list a span{
  display: none;
}

.link-list svg{
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  color: var(--text);
  display: block;
}

.link-list svg,
.link-list svg *{
  fill: currentColor;
}

.link-list a:hover{
  transform: translateY(-1px);
  border-color: rgba(45,212,255,.35);
}

.contact-aside .card-title + p{
  margin-top: .75rem;
}

.contact-location{
  display: none;
}

/* Desktop */
@media (min-width: 1024px){
  .contact-grid{
    grid-template-columns: 1fr .8fr;
    gap: var(--space-card-gap);
  }

  .contact-form{
    padding: var(--space-card);
  }

  .contact-form label{
    position: static;
    width: auto;
    height: auto;
    overflow: visible;
    clip-path: none;
    white-space: normal;

    font-weight: 700;
    font-size: var(--fs-contact-label);
    color: var(--muted);
  }

  .contact-form input::placeholder,
  .contact-form textarea::placeholder{
    color: transparent;
    opacity: 0;
  }

  .field{
    gap: .25rem;
    margin-bottom: var(--space-contact-field);
  }

  .contact-form .btn-primary{
    width: auto;
  }

  .form-toast{
    left: auto;
    right: 24px;
    bottom: 24px;

    min-width: 260px;
    max-width: 360px;
  }
  
  .link-list{
    gap: var(--space-card-gap);
    grid-template-columns: 1fr;
  }

  .link-list a{
    justify-content: flex-start;
    gap: .625rem;
    padding: .75rem;
  }

  .link-list a span{
    display: inline;
  }

  .link-list svg{
    width: 30px;
    height: 30px;
  }

  .contact-location{
    display: block;
  }
}

/* =========================
   Botón flotante
   ========================= */
.scroll-next{
  display: none;
}

/* Desktop */
@media (min-width: 1024px){
  .scroll-next{
    position: fixed;
    left: 50%;
    bottom: 55px;
    transform: translateX(-50%);
    z-index: 2000;

    width: 60px;
    height: 85px;
    border-radius: 30px;
    border: 1px solid rgba(255,255,255,.25);
    background: rgba(255,255,255,.04);

    backdrop-filter: blur(1px);
    -webkit-backdrop-filter: blur(1px);

    color: var(--text);

    display: grid;
    place-items: center;

    cursor: pointer;

    transition: all .25s ease;

    animation: floatDown 2s ease-in-out infinite;
  }

  .scroll-next svg{
    width: 40px;
    height: 50px;
    fill: var(--accent);

    transition: all .25s ease;

    filter:
      drop-shadow(0 0 6px rgba(45,212,255,.8))
      drop-shadow(0 0 14px rgba(45,212,255,.6));

    pointer-events: none;
  }

  .scroll-next:hover{
    border-color: rgba(45,212,255,.6);

    box-shadow:
      0 0 15px rgba(45,212,255,.3),
      inset 0 0 10px rgba(45,212,255,.15);

    transform: translateX(-50%) translateY(-3px);
  }

  .scroll-next:hover svg{
    fill: #ffffff;

    filter:
      drop-shadow(0 0 8px rgba(255,255,255,.9))
      drop-shadow(0 0 18px rgba(45,212,255,.8));
  }
}

@keyframes floatDown{
  0% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
  100% { transform: translateX(-50%) translateY(0); }
}

/* =========================
   Footer
   ========================= */
.site-footer{
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  background: color-mix(in srgb, var(--card) 80%, transparent);
}

.footer-inner{
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .875rem;
  color: var(--muted);
}

/* Desktop */
@media (min-width: 1024px){
  .footer-inner{
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.to-top{
  padding: .625rem .75rem;
  border-radius: .75rem;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  color: var(--text);
}

/* =========================
   Responsive
   ========================= */

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