/* ================================================================
   index.css — Portafolio CV · Sergio Garduño Jardón
   ================================================================ */

/* ---------------------------------------------------------------
   1. VARIABLES GLOBALES
   --------------------------------------------------------------- */
:root {
  --bg-uniform:       #333;
  --fg:               #eef1f0;
  --muted:            #a3a3a3;

  /* Acentos */
  --accent-red:       #ff3366;
  --accent-green:     #63b96f;
  --accent-blue:      #0077b6;
  --accent-yellow:    #ffc300;
  --accent-purple:    #9933cc;
  --accent-gold:      #FFD700;
  --accent-emerald:   #2E8B57;
  --accent-guinda:    #900030;
  --accent-orange:    #FF5733;

  /* Tarjetas */
  --card-bg:          rgba(0, 0, 0, 0.88);
  --card-border:      rgba(255, 255, 255, 0.1);

  /* Layout */
  --maxw:             1100px;
  --radius:           14px;
  --font-sans:        Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  --menu-width-collapsed: 70px;
  --menu-width-expanded:  240px;
}

/* ---------------------------------------------------------------
   2. RESET Y BASE
   --------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  background-color: var(--bg-uniform);
  scroll-behavior: smooth;
}

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background: transparent;
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
  min-height: 100vh;
  padding-top: 28px;
  padding-bottom: 80px;
  padding-left: var(--menu-width-collapsed);
  transition: padding-left 0.3s ease-in-out;
}

body.menu-expanded {
  padding-left: var(--menu-width-expanded);
}

/* ---------------------------------------------------------------
   3. LAYOUT PRINCIPAL
   --------------------------------------------------------------- */
.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  position: relative;
  padding: 0 10px;
}

.hero {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 28px;
  margin-bottom: 28px;
  align-items: stretch;
}

.hero-main  { display: flex; flex-direction: column; gap: 28px; }
.hero-aside { position: sticky; top: 28px; display: flex; flex-direction: column; gap: 28px; }

/* ---------------------------------------------------------------
   4. TARJETAS
   --------------------------------------------------------------- */
.card {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 20px;
  border-radius: var(--radius);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
  color: var(--fg);
  overflow: hidden;
  border-left: 5px solid;
  /* Animación de entrada */
  transition: opacity 0.6s ease-out, transform 0.6s ease-out, box-shadow 0.2s ease;
  opacity: 0;
  transform: translateY(30px);
}

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

.card:hover { transform: translateY(0); }

/* Franja decorativa superior-derecha */
.card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 5px;
  height: 35px;
  border-top-right-radius: var(--radius);
  z-index: 1;
}

/* ---------------------------------------------------------------
   5. COLORES POR SECCIÓN
   --------------------------------------------------------------- */
/* Perfil */
#perfil            { border-left-color: var(--accent-blue); }
#perfil::after     { background: var(--accent-blue); }
#perfil .profile-title { color: var(--accent-blue); }

/* Proyectos */
#proyectos > summary                          { color: var(--accent-purple); border-color: rgba(153, 51, 204, 0.3); }
#proyectos .section-content .card            { border-left-color: var(--accent-purple); opacity: 1; transform: none; }
#proyectos .section-content .card::after     { background: var(--accent-purple); }
#proyectos .section-content .card strong     { color: var(--fg); }

/* Experiencia */
#experiencia > summary                        { color: var(--accent-emerald); border-color: rgba(46, 139, 87, 0.3); }
#experiencia .section-content .card          { border-left-color: var(--accent-emerald); opacity: 1; transform: none; }
#experiencia .section-content .card::after   { background: var(--accent-emerald); }
#experiencia .section-content .card strong   { color: var(--fg); }

/* Logros */
#logros > summary                             { color: var(--accent-gold); border-color: rgba(255, 215, 0, 0.3); }
#logros .section-content .card               { border-left-color: var(--accent-gold); opacity: 1; transform: none; }
#logros .section-content .card::after        { background: var(--accent-gold); }

/* Cursos */
#cursos > summary                             { color: var(--accent-red); border-color: rgba(255, 51, 102, 0.3); }
#cursos .section-content .card               { border-left-color: var(--accent-red); opacity: 1; transform: none; }
#cursos .section-content .card::after        { background: var(--accent-red); }

/* Formación */
#formacion                                     { border-left-color: var(--accent-purple); }
#formacion::after                              { background: var(--accent-purple); }
#formacion > div:first-child                   { color: var(--accent-purple); font-weight: 800; margin-bottom: 15px; }

/* Contacto */
#contacto                                      { border-left-color: var(--fg); }
#contacto::after                               { background: var(--fg); }
#contacto > div:first-child                    { color: var(--fg); font-weight: 800; margin-bottom: 8px; }

/* Habilidades */
#habilidades                                   { border-left-color: var(--accent-blue); }
#habilidades::after                            { background: var(--accent-blue); }
#habilidades > div:first-child                 { color: var(--accent-blue); font-weight: 800; margin-bottom: 8px; }

/* Habilidades Blandas (3er card del aside) */
aside .card:nth-of-type(3)                     { border-left-color: var(--accent-gold); }
aside .card:nth-of-type(3)::after              { background: var(--accent-gold); }
aside .card:nth-of-type(3) > div:first-child   { color: var(--accent-gold); font-weight: 800; margin-bottom: 8px; }

/* ---------------------------------------------------------------
   6. ENCABEZADO PRINCIPAL
   --------------------------------------------------------------- */
.main-header-card {
  background: var(--card-bg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-top: 2px solid var(--fg);
  border-bottom: 2px solid var(--fg);
  border-right: 2px solid var(--fg);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  padding: 25px 20px;
}

.main-header-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 5px;
  height: 35px;
  background: var(--fg);
  border-top-right-radius: var(--radius);
  z-index: 1;
}

header {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 15px;
  margin-bottom: 0;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

/* ---------------------------------------------------------------
   7. AVATAR
   --------------------------------------------------------------- */
.avatar {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--fg);
  box-shadow: 0 0 20px rgba(238, 241, 240, 0.6);
  cursor: pointer;
  transition: all 0.3s ease-in-out;
  margin-bottom: 5px;
  animation: pulse-avatar-glow 1.5s infinite alternate ease-in-out;
}

.avatar:hover        { transform: scale(1.05); }
.avatar.qr-mode      { border-radius: var(--radius); border-color: var(--accent-green); transform: scale(1.1); }
.avatar.qr-mode:hover { transform: scale(1.1); }

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

/* ---------------------------------------------------------------
   8. TÍTULO / TYPEWRITER
   --------------------------------------------------------------- */
.title {
  font-weight: 900;
  font-size: 30px;
  color: #000;
  text-shadow:
    -1px -1px 0 var(--fg),
     1px -1px 0 var(--fg),
    -1px  1px 0 var(--fg),
     1px  1px 0 var(--fg);
  text-align: center;
}

.typewriter-title {
  font-size: 36px;
  font-weight: 900;
  color: #000;
  text-shadow:
    -1px -1px 0 var(--fg),
     1px -1px 0 var(--fg),
    -1px  1px 0 var(--fg),
     1px  1px 0 var(--fg);
  text-align: center;
  overflow: hidden;
  white-space: nowrap;
  border-right: 3px solid var(--accent-gold);
  width: 100%;
  opacity: 1;
}

.typewriter-title.visible { opacity: 1; }

@keyframes blink-caret {
  from, to { border-color: transparent; }
  50%      { border-color: var(--accent-gold); }
}

@media (max-width: 480px) {
  .typewriter-title { font-size: 28px; }
}

@media (max-width: 600px) {
  #typewriter-name-container { font-size: 1.5rem !important; }
}

/* ---------------------------------------------------------------
   9. BOTONES
   --------------------------------------------------------------- */
.btn-fill-white {
  background: var(--fg);
  color: #333;
  border: 2px solid var(--fg);
  padding: 8px 12px;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  gap: 8px;
  align-items: center;
  transition: all 0.2s;
  flex-shrink: 0;
  box-shadow: 0 4px 15px rgba(238, 241, 240, 0.2);
}
.btn-fill-white:hover {
  background: #cdd1d0;
  border-color: #cdd1d0;
  box-shadow: 0 6px 20px rgba(238, 241, 240, 0.4);
  transform: translateY(-1px);
}

.btn-outline-white {
  background: transparent;
  border: 2px solid var(--fg);
  color: var(--fg);
  padding: 8px 12px;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  gap: 8px;
  align-items: center;
  transition: background-color 0.15s;
  flex-shrink: 0;
}
.btn-outline-white:hover { background: rgba(238, 241, 240, 0.1); }

.btn-clean-secondary {
  background: transparent;
  border: 2px solid var(--accent-blue);
  color: var(--accent-blue);
  padding: 8px 12px;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  gap: 8px;
  align-items: center;
  transition: background-color 0.15s;
  flex-shrink: 0;
}
.btn-clean-secondary:hover { background: rgba(0, 119, 182, 0.1); }

.btn-outline-orange {
  background: transparent;
  border: 2px solid var(--accent-orange);
  color: var(--accent-orange);
  padding: 8px 12px;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  gap: 8px;
  align-items: center;
  transition: background-color 0.15s;
  flex-shrink: 0;
}
.btn-outline-orange:hover { background: rgba(255, 87, 51, 0.1); }

.btn-accent   { background: var(--accent-green);  color: #03120a; padding: 10px 14px; border-radius: 10px; text-decoration: none; font-weight: 700; }
.btn-primary  { background: var(--accent-blue);   color: #fff;    padding: 10px 14px; border-radius: 10px; text-decoration: none; font-weight: 700; }
.btn-dark     { background: var(--accent-purple);  color: #fff;    padding: 10px 14px; border-radius: 10px; text-decoration: none; font-weight: 700; border: 1px solid rgba(153, 51, 204, 0.4); }
.iot-actions a { color: #fff; text-decoration: none; }

/* ---------------------------------------------------------------
   10. BOTÓN COMPARTIR
   --------------------------------------------------------------- */
.share-button {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--card-bg);
  color: var(--fg);
  border: 1px solid var(--card-border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.2em;
  cursor: pointer;
  transition: all 0.2s ease-in-out;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}
.share-button:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: scale(1.05);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
}

@media (max-width: 600px) {
  .share-button { top: 15px; right: 15px; width: 35px; height: 35px; font-size: 1.1em; }
}

/* ---------------------------------------------------------------
   11. SECCIONES DESPLEGABLES (details/summary)
   --------------------------------------------------------------- */
details > summary {
  border-bottom: 2px solid;
  padding-bottom: 4px;
  margin-bottom: 15px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

details > summary::after {
  content: '▼';
  font-size: 0.8em;
  color: var(--muted);
  margin-left: 10px;
  transition: transform 0.2s ease-out;
  flex-shrink: 0;
}

details[open] > summary::after { transform: rotate(180deg); }

.section-content {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

h2.section {
  font-size: 18px;
  margin: 0;
  font-weight: 800;
  flex-grow: 1;
}

summary > h2.section { color: inherit !important; }

/* ---------------------------------------------------------------
   12. PERFIL – CARTA DE PRESENTACIÓN DESPLEGABLE
   --------------------------------------------------------------- */
.inner-details {
  margin-top: 15px;
  border-top: 1px solid var(--card-border);
  padding-top: 15px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.5s ease-out 0.5s, transform 0.5s ease-out 0.5s;
}

.inner-details.visible {
  opacity: 1;
  transform: translateY(0);
}

.inner-summary {
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  font-weight: 700;
  color: var(--accent-gold);
  margin-bottom: 10px;
  list-style: none;
  transition: opacity 0.2s ease;
}
.inner-summary:hover          { opacity: 0.8; }
.inner-summary::-webkit-details-marker { display: none; }
.inner-summary::after {
  content: '▼';
  font-size: 0.8em;
  color: var(--muted);
  margin-left: 8px;
  transition: transform 0.2s ease-out;
}
.inner-details[open] > .inner-summary::after { transform: rotate(180deg); }

.inner-content {
  padding-left: 22px;
  color: var(--fg);
  opacity: 0.9;
}

/* Botón copiar carta */
.copy-button-container { text-align: right; margin-top: 15px; }

.btn-copy-carta {
  background-color: transparent;
  border: 1px solid var(--accent-gold);
  color: var(--accent-gold);
  padding: 6px 12px;
  border-radius: 8px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.9em;
}
.btn-copy-carta:hover  { background-color: rgba(255, 215, 0, 0.1); box-shadow: 0 2px 8px rgba(255, 215, 0, 0.2); }
.btn-copy-carta:active { transform: scale(0.98); }
.btn-copy-carta.copied { border-color: var(--accent-green); background-color: rgba(99, 185, 111, 0.1); color: var(--accent-green); }

/* ---------------------------------------------------------------
   13. TIPOGRAFÍA Y ELEMENTOS GENERALES
   --------------------------------------------------------------- */
h2.profile-title  { font-size: 18px; font-weight: 800; margin-top: 0; margin-bottom: 8px; }
.profile-text     {
  color: var(--fg);
  font-size: 15px;
  line-height: 1.6;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
  transition-delay: 0.5s;
}
.profile-text.visible { opacity: 1; transform: translateY(0); }

.skill-pill {
  color: var(--fg);
  padding: 6px 10px;
  border-radius: 6px;
  margin: 4px;
  display: inline-block;
  font-size: 14px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.skills { display: flex; flex-wrap: wrap; margin-top: 10px; }

.clean        { padding-left: 20px; margin: 0; list-style-type: none; }
.contact-small { font-size: 0.9em; color: var(--muted); }

.acad-ipn-title {
  color: var(--accent-guinda);
  font-weight: 800;
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 18px;
  text-align: center;
}

.iot-block       { margin-top: 14px; padding: 0; background: transparent; border: none; }
.iot-block h3    { color: var(--accent-purple); margin: 16px 0 10px; font-size: 18px; font-weight: 800; text-shadow: 0 0 2px rgba(153, 51, 204, 0.5); }
.iot-actions     { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; margin-top: 14px; }

/* ---------------------------------------------------------------
   14. SELECTOR DE IDIOMA
   --------------------------------------------------------------- */
.lang-switcher {
  top: 40px;
  right: 60px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.lang-switcher button {
  background: var(--card-bg);
  color: var(--fg);
  border: 1px solid var(--accent-gold);
  padding: 5px 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.5em;
  line-height: 1;
  transition: background-color 0.2s;
  opacity: 0.8;
}
.lang-switcher button:hover        { opacity: 1; background: rgba(255, 215, 0, 0.1); }
.lang-switcher button.active       { display: none; }

/* ---------------------------------------------------------------
   15. MENÚ LATERAL
   --------------------------------------------------------------- */
.side-navbar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  background: var(--card-bg);
  border-right: 1px solid var(--card-border);
  width: var(--menu-width-collapsed);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 0;
  z-index: 1000;
  overflow: hidden;
  transition: width 0.3s ease-in-out;
}

.side-navbar.expanded {
  width: var(--menu-width-expanded);
  align-items: flex-start;
}

.side-navbar ul {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  width: 100%;
  flex-grow: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

.side-navbar .nav-link {
  display: flex;
  align-items: flex-start;
  padding: 10px 0 10px 23px;
  color: var(--fg);
  text-decoration: none;
  height: auto;
  min-height: 50px;
  width: 100%;
  white-space: nowrap;
  transition: background-color 0.2s ease;
}
.side-navbar .nav-link:hover { background-color: rgba(255, 255, 255, 0.1); }

.side-navbar .nav-link i {
  font-size: 1.3em;
  width: 24px;
  text-align: center;
  color: var(--fg);
  transition: text-shadow 0.2s ease, transform 0.2s ease;
  transform: scale(1);
  margin-top: 3px;
  flex-shrink: 0;
}

/* Colores de neón por sección */
.nav-link-perfil      i { text-shadow: 0 0 5px var(--accent-blue),    0 0 10px var(--accent-blue); }
.nav-link-proyectos   i { text-shadow: 0 0 5px var(--accent-purple),  0 0 10px var(--accent-purple); }
.nav-link-experiencia i { text-shadow: 0 0 5px var(--accent-emerald), 0 0 10px var(--accent-emerald); }
.nav-link-logros      i { text-shadow: 0 0 5px var(--accent-gold),    0 0 10px var(--accent-gold); }
.nav-link-cursos      i { text-shadow: 0 0 5px var(--accent-red),     0 0 10px var(--accent-red); }
.nav-link-formacion   i { text-shadow: 0 0 5px var(--accent-purple),  0 0 10px var(--accent-purple); }
.nav-link-habilidades i { text-shadow: 0 0 5px var(--accent-blue),    0 0 10px var(--accent-blue); }
.nav-link-contacto    i { text-shadow: 0 0 5px var(--accent-green),   0 0 10px var(--accent-green); }
.nav-link-td          i { text-shadow: 0 0 5px var(--accent-purple),  0 0 10px var(--accent-purple); }

.side-navbar .nav-link:hover i { text-shadow: 0 0 12px var(--fg), 0 0 20px var(--fg); transform: scale(1.1); }

.link-text-container {
  margin-left: 20px;
  display: flex;
  flex-direction: column;
}

.side-navbar .link-text {
  margin-left: 0;
  font-weight: 600;
  opacity: 0;
  transition: opacity 0.2s ease;
  display: block;
  line-height: 1.2;
}

.link-subtitle {
  font-size: 0.75em;
  color: var(--muted);
  opacity: 0;
  transition: opacity 0.2s ease;
  line-height: 1.1;
  margin-top: 2px;
  font-weight: 400;
}

.side-navbar.expanded .link-text,
.side-navbar.expanded .link-subtitle { opacity: 1; }

#menu-toggle-btn {
  background: none;
  border: none;
  color: var(--fg);
  font-size: 1.5em;
  cursor: pointer;
  padding: 10px 23px;
}

#menu-toggle-btn .fa-chevron-left          { display: none; }
.side-navbar.expanded #menu-toggle-btn .fa-chevron-left  { display: inline; }
.side-navbar.expanded #menu-toggle-btn .fa-chevron-right { display: none; }

/* ---------------------------------------------------------------
   16. CONTACTO – BOTONES PRESIONABLES
   --------------------------------------------------------------- */
#contacto .contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

#contacto .contact-list li.full-width-btn { grid-column: span 2; }
#contacto .contact-list li { display: block; }

#contacto .contact-btn-pressable {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 700;
  color: #000;
  transition: all 0.2s ease-out;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}
#contacto .contact-btn-pressable:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}
#contacto .contact-btn-pressable i {
  font-size: 1.2em;
  margin-right: 12px;
  width: 25px;
  text-align: center;
  color: inherit;
}

#contacto .btn-email          { background: var(--accent-yellow); color: #332400; }
#contacto .btn-email:hover    { box-shadow: 0 8px 25px rgba(255, 195, 0, 0.3); }
#contacto .btn-email i        { color: #332400; }

#contacto .btn-email-rojo         { background: var(--accent-red); color: var(--fg); }
#contacto .btn-email-rojo:hover   { box-shadow: 0 8px 25px rgba(255, 51, 102, 0.3); }
#contacto .btn-email-rojo i       { color: var(--fg); }
#contacto .btn-email-rojo span    { font-size: 0.85em; white-space: nowrap; }

#contacto .btn-whatsapp         { background: var(--accent-green); color: #03120a; }
#contacto .btn-whatsapp:hover   { box-shadow: 0 8px 25px rgba(99, 185, 111, 0.3); }
#contacto .btn-whatsapp i       { color: #03120a; }

#contacto .btn-github         { background: var(--accent-purple); color: var(--fg); }
#contacto .btn-github:hover   { box-shadow: 0 8px 25px rgba(153, 51, 204, 0.3); }
#contacto .btn-github i       { color: var(--fg); }

#contacto .btn-x              { background: #000; color: var(--fg); border: 2px solid var(--fg); }
#contacto .btn-x:hover        { box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5); }
#contacto .btn-x i            { color: var(--fg); }

#contacto .btn-facebook         { background: #1877F2; color: var(--fg); }
#contacto .btn-facebook:hover   { box-shadow: 0 8px 25px rgba(24, 119, 242, 0.3); }
#contacto .btn-facebook i       { color: var(--fg); }

#contacto .btn-instagram         { background: var(--accent-orange); color: var(--fg); }
#contacto .btn-instagram:hover   { box-shadow: 0 8px 25px rgba(255, 87, 51, 0.3); }
#contacto .btn-instagram i       { color: var(--fg); }

#contacto .btn-tiktok         { background: #fff; color: #000; }
#contacto .btn-tiktok:hover   { box-shadow: 0 8px 25px rgba(255, 255, 255, 0.3); }
#contacto .btn-tiktok i       { color: #000; }

/* ---------------------------------------------------------------
   17. FOOTER
   --------------------------------------------------------------- */
footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 26px 15px 10px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  margin-left: 0;
  width: 100%;
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
  opacity: 0;
  transform: translateY(30px);
}

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

.footer-brand { display: flex; align-items: center; gap: 8px; }
.sello       { width: 40px; height: 40px; border-radius: 8px; overflow: hidden; }
.sello img   { width: 100%; height: 100%; object-fit: cover; }

/* ---------------------------------------------------------------
   18. PARTÍCULAS
   --------------------------------------------------------------- */
#particles-js {
  position: fixed;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: -1;
  background-color: var(--bg-uniform);
}

/* ---------------------------------------------------------------
   19. PRELOADER
   --------------------------------------------------------------- */
#preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-uniform);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 20px;
  opacity: 1;
  transition: opacity 0.5s ease-out;
}

#preloader.hidden { opacity: 0; pointer-events: none; }

.haku-visual-container {
  display: flex;
  justify-content: center;
  align-items: center;
}

.haku-img  { width: 300px; height: 300px; }

.loading-text {
  font-size: 3.5em;
  font-weight: bold;
  color: var(--fg);
  text-shadow: 0 0 12px rgba(255, 255, 255, 0.4);
  white-space: nowrap;
}

.loading-text span {
  display: inline-block;
  opacity: 0;
  transform: translateY(-5px);
  transition: opacity 0.3s ease-out, transform 0.3s ease-out;
}

.loading-text.animate span { opacity: 1; transform: translateY(0); }

@media (max-width: 600px) {
  .loading-text { font-size: 1.8rem; }
}

/* ---------------------------------------------------------------
   20. ANIMACIONES GLOBALES
   --------------------------------------------------------------- */
@keyframes pulse-avatar-glow {
  from { box-shadow: 0 0 20px rgba(238, 241, 240, 0.4); }
  to   { box-shadow: 0 0 30px rgba(238, 241, 240, 0.8); }
}

/* Pulso genérico por color de variable */
.card.pulse-card-white,
.card.pulse-card-purple,
.card.pulse-card-emerald,
.card.pulse-card-gold,
.card.pulse-card-red,
.card.pulse-card-blue {
  animation: pulse-color-shadow 1.5s infinite alternate ease-in-out;
}

@keyframes pulse-color-shadow {
  from { box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25); }
  to   {
    box-shadow:
      0 8px 40px rgba(0, 0, 0, 0.5),
      0 0 10px var(--pulse-color),
      0 0 15px rgba(255, 255, 255, 0.05);
  }
}

.card.pulse-card-white { animation: pulse-shadow-white 1.5s infinite alternate ease-in-out; }

@keyframes pulse-shadow-white {
  from { box-shadow: 0 10px 30px rgba(238, 241, 240, 0.1), 0 0 5px rgba(238, 241, 240, 0.05); }
  to   { box-shadow: 0 10px 30px rgba(238, 241, 240, 0.3), 0 0 15px rgba(238, 241, 240, 0.15); }
}

/* ---------------------------------------------------------------
   21. RESPONSIVE
   --------------------------------------------------------------- */
@media (max-width: 1100px) {
  .hero            { grid-template-columns: 1fr; }
  .hero-aside      { position: static; }
}

@media (max-width: 980px) {
  body {
    padding: 28px 15px;
    padding-left: calc(var(--menu-width-collapsed) + 15px);
  }
  body.menu-expanded {
    padding-left: calc(var(--menu-width-expanded) + 15px);
  }
  .main-header-card { flex-direction: column; align-items: center; gap: 15px; padding: 15px; width: 100%; }
  header            { width: 100%; flex-direction: column; align-items: flex-start; gap: 10px; }
  .header-main-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    margin-top: 5px;
  }
  .hero        { grid-template-columns: 1fr; }
  .hero-aside  { position: static; }
}

@media (max-width: 480px) {
  .title  { font-size: 24px; }
  .avatar { width: 70px; height: 70px; }
}

/* ---------------------------------------------------------------
   22. ACCESIBILIDAD (prefers-reduced-motion)
   --------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }

  .card, footer {
    opacity: 1 !important;
    transform: none !important;
  }

  .typewriter-title,
  #perfil .profile-text,
  #perfil .inner-details {
    opacity: 1 !important;
    transform: none !important;
  }

  #preloader { display: none !important; }
}