/* ============================================
   ESPAI DE LECTURA I ESCRIPTURA — Base & Layout
   Fonts: Fredoka One (títols) · Nunito (cos)
============================================ */

:root {
  --font-h: 'Fredoka One', cursive;
  --font-b: 'Nunito', sans-serif;

  /* Paleta global */
  --coral:    #EF476F;
  --yellow:   #FFD166;
  --teal:     #06C994;
  --blue:     #118AB2;
  --purple:   #845EC2;
  --orange:   #FF6B35;
  --cream:    #FFFBF0;
  --navy:     #073B4C;
  --white:    #FFFFFF;
  --light-gray: #F4F5F7;

  /* Radis */
  --r-sm: 12px;
  --r-md: 20px;
  --r-lg: 28px;
  --r-xl: 40px;

  /* Ombres */
  --s-sm: 0 2px 10px rgba(0,0,0,.07);
  --s-md: 0 6px 22px rgba(0,0,0,.10);
  --s-lg: 0 14px 40px rgba(0,0,0,.13);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-b);
  background: var(--cream);
  color: var(--navy);
  overflow-x: hidden;
}

/* ==============================
   CAPÇALERA & PESTANYES
============================== */

header {
  position: sticky;
  top: 0;
  z-index: 300;
  background: var(--white);
  box-shadow: 0 2px 18px rgba(0,0,0,.09);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  height: 72px;
  gap: 1.5rem;
}

/* Hamburguesa del header — oculto por defecto (desktop) */
.header-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: none;
  border-radius: 12px;
  background: var(--cream);
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  transition: background .2s ease, transform .25s ease;
  flex-shrink: 0;
}
.header-toggle:hover { background: #f0eadc; transform: scale(1.06); }
.header-toggle span {
  display: block;
  width: 21px;
  height: 3px;
  border-radius: 3px;
  background: var(--coral);
  transition: transform .3s cubic-bezier(.16,1,.3,1), opacity .25s ease;
  transform-origin: center;
}
.header-toggle.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.header-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.header-toggle.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

.logo {
  display: flex;
  align-items: center;
  gap: .7rem;
  flex-shrink: 0;
  text-decoration: none;
}
.logo svg { width: 38px; height: 38px; }
.logo-text  { font-family: var(--font-h); font-size: 1.35rem; color: var(--coral); line-height: 1; }
.logo-sub   { font-size: .65rem; font-weight: 800; color: var(--teal); letter-spacing: .1em; text-transform: uppercase; }

.tab-nav {
  display: flex;
  gap: .5rem;
  height: 100%;
  align-items: flex-end;
}

.tab-btn {
  font-family: var(--font-h);
  font-size: .98rem;
  padding: .55rem 1.5rem;
  border: none;
  border-radius: 16px 16px 0 0;
  cursor: pointer;
  transition: all .3s cubic-bezier(.16,1,.3,1);
  white-space: nowrap;
  background: #eeeeee;
  color: #aaa;
  position: relative;
  bottom: 0;
}
.tab-btn:hover { transform: translateY(-3px); background: #e0e0e0; color: #888; }

.tab-btn[data-tab="qui-som"].active  { background: var(--coral);  color: var(--white); transform: translateY(-5px); box-shadow: 0 -4px 14px rgba(239,71,111,.35); }
.tab-btn[data-tab="quart"].active    { background: var(--teal);   color: var(--white); transform: translateY(-5px); box-shadow: 0 -4px 14px rgba(6,201,148,.35); }
.tab-btn[data-tab="sise"].active     { background: var(--blue);   color: var(--white); transform: translateY(-5px); box-shadow: 0 -4px 14px rgba(17,138,178,.35); }

/* Panells de pestanya */
.tab-panel { display: none; min-height: calc(100vh - 72px); }
.tab-panel.active { display: block; animation: fadeIn .35s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ==============================
   ELEMENTS DECORATIUS FLOTANTS
============================== */

.deco-wrap {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.deco {
  position: absolute;
  animation: floatUp var(--dur, 5s) ease-in-out infinite;
  animation-delay: var(--del, 0s);
}
@keyframes floatUp {
  0%,100% { transform: translateY(0)   rotate(0deg)  scale(1);    }
  33%      { transform: translateY(-18px) rotate(8deg)  scale(1.06); }
  66%      { transform: translateY(-8px)  rotate(-5deg) scale(.96);  }
}
@keyframes floatSpin {
  0%,100% { transform: translateY(0) rotate(0deg); }
  50%     { transform: translateY(-22px) rotate(180deg); }
}

/* ==============================
   QUI SOM? — Secció
============================== */

#qui-som {
  background: linear-gradient(150deg, #fff5f8 0%, #fffbf0 55%, #f0feff 100%);
  padding: 4rem 2rem 6rem;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 5rem;
  position: relative;
  z-index: 1;
}
.section-header h1 {
  font-family: var(--font-h);
  font-size: 3.4rem;
  color: var(--coral);
  line-height: 1.1;
  margin-bottom: .4rem;
}
.section-header .sub {
  font-size: 1.15rem;
  color: #999;
  font-weight: 600;
}

/* TIMELINE */
.timeline {
  max-width: 960px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
/* Línia central vertical */
.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 60px;
  bottom: 60px;
  width: 5px;
  background: linear-gradient(to bottom, var(--coral), var(--yellow) 50%, var(--teal));
  transform: translateX(-50%);
  border-radius: 4px;
  opacity: .35;
}

.tl-item {
  display: grid;
  grid-template-columns: 1fr 64px 1fr;
  align-items: center;
  gap: 1.2rem;
  margin-bottom: 4.5rem;
  opacity: 0;
  transition: opacity .8s ease, transform .85s cubic-bezier(.16,1,.3,1);
}
.tl-item:nth-child(odd)  { transform: translateX(-70px); }
.tl-item:nth-child(even) { transform: translateX( 70px); }
.tl-item.visible { opacity: 1; transform: translateX(0) !important; }

/* Per items parells: invertim columnes */
.tl-item:nth-child(even) .tl-photo { grid-column: 3; grid-row: 1; }
.tl-item:nth-child(even) .tl-dot   { grid-column: 2; grid-row: 1; }
.tl-item:nth-child(even) .tl-card  { grid-column: 1; grid-row: 1; }

.tl-photo {
  display: flex;
  justify-content: flex-end;
}
.tl-item:nth-child(even) .tl-photo { justify-content: flex-start; }

.avatar-wrap {
  width: 175px;
  height: 175px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: var(--s-lg);
  border: 5px solid var(--white);
  transition: transform .3s ease;
  flex-shrink: 0;
}
.avatar-wrap:hover { transform: scale(1.06) rotate(-3deg); }
.avatar-wrap svg { width: 100%; height: 100%; display: block; }

.tl-dot {
  display: flex;
  align-items: center;
  justify-content: center;
}
.dot-inner {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--white);
  border: 4px solid var(--coral);
  box-shadow: 0 0 0 6px rgba(239,71,111,.18);
  z-index: 2;
}
.tl-item:nth-child(2) .dot-inner { border-color: var(--yellow); box-shadow: 0 0 0 6px rgba(255,209,102,.25); }
.tl-item:nth-child(3) .dot-inner { border-color: var(--teal);   box-shadow: 0 0 0 6px rgba(6,201,148,.2); }

.tl-card {
  display: flex;
}
.tl-item:nth-child(even) .tl-card { justify-content: flex-end; }

.tl-card-inner {
  background: var(--white);
  border-radius: var(--r-lg);
  padding: 1.8rem 2rem;
  box-shadow: var(--s-md);
  max-width: 350px;
  width: 100%;
  position: relative;
  transition: transform .3s ease, box-shadow .3s ease;
}
.tl-card-inner:hover { transform: translateY(-5px); box-shadow: var(--s-lg); }

/* Triangle de fletxa */
.tl-item:nth-child(odd)  .tl-card-inner::before { content:''; position:absolute; left:-13px; top:50%; transform:translateY(-50%); border-top:12px solid transparent; border-bottom:12px solid transparent; border-right:14px solid var(--white); }
.tl-item:nth-child(even) .tl-card-inner::before { content:''; position:absolute; right:-13px; top:50%; transform:translateY(-50%); border-top:12px solid transparent; border-bottom:12px solid transparent; border-left:14px solid var(--white); }

.tl-card-inner h2 {
  font-family: var(--font-h);
  font-size: 1.55rem;
  color: var(--coral);
  margin-bottom: .15rem;
}
.tl-item:nth-child(2) .tl-card-inner h2 { color: #c07a00; }
.tl-item:nth-child(3) .tl-card-inner h2 { color: var(--teal); }

.tl-card-inner .role {
  display: block;
  font-size: .75rem;
  font-weight: 900;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: .7rem;
}
.tl-card-inner p { font-size: .93rem; line-height: 1.75; color: #666; }

/* ==============================
   4T & 6È — Layout principal
============================== */

#quart, #sise {
  position: relative;
  min-height: calc(100vh - 72px);
}
#quart { background: linear-gradient(150deg, #f0fff9 0%, #fffbf0 100%); }
#sise  { background: linear-gradient(150deg, #f0f6ff 0%, #f5f0ff 100%); }

.tab-layout {
  display: flex;
  min-height: calc(100vh - 72px);
  position: relative;
  z-index: 1;
}

/* ==============================
   RESPONSIVE — Fluid typography
============================== */
.section-header h1 { font-size: clamp(2rem, 6vw, 3.4rem); }

/* ---- Tablet & smaller (≤1024px) ---- */
@media (max-width: 1024px) {
  header { padding: 0 1.25rem; gap: 1rem; }
  #qui-som { padding: 3rem 1.5rem 4.5rem; }
  .section-header { margin-bottom: 3.5rem; }
}

/* ---- Móvil (≤768px) ---- */
@media (max-width: 768px) {
  header { padding: 0 .9rem; height: 64px; gap: .6rem; }
  .logo svg { width: 32px; height: 32px; }
  .logo-text { font-size: 1.1rem; }
  .logo-sub { display: none; }

  /* Mostrar hamburguesa, convertir nav en dropdown */
  .header-toggle { display: flex; }

  .tab-nav {
    position: absolute;
    top: 100%;
    right: .9rem;
    left: auto;
    min-width: 220px;
    background: var(--white);
    border-radius: var(--r-md);
    flex-direction: column;
    align-items: stretch;
    height: auto;
    gap: .3rem;
    padding: .65rem;
    box-shadow: 0 14px 38px rgba(0,0,0,.18);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px) scale(.96);
    transform-origin: top right;
    transition: opacity .2s ease, transform .25s cubic-bezier(.16,1,.3,1);
    z-index: 280;
  }
  .tab-nav.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(8px) scale(1);
  }

  .tab-btn {
    width: 100%;
    text-align: left;
    padding: .75rem 1rem;
    font-size: .95rem;
    border-radius: 12px;
    bottom: auto;
  }
  .tab-btn:hover { transform: none; }
  .tab-btn[data-tab="qui-som"].active,
  .tab-btn[data-tab="quart"].active,
  .tab-btn[data-tab="sise"].active { transform: none; }

  .tab-panel { min-height: calc(100vh - 64px); }

  /* Decoraciones atenuadas para no saturar */
  .deco { opacity: .55; }
  .deco:nth-of-type(n+7) { display: none; }

  /* Timeline apilada */
  #qui-som { padding: 2.5rem 1.2rem 4rem; }
  .timeline { max-width: 100%; }
  .tl-item { grid-template-columns: 1fr; gap: .8rem; margin-bottom: 3rem; }
  .timeline::before { display: none; }
  .tl-dot { display: none; }
  .tl-item:nth-child(odd)  { transform: translateY(40px); }
  .tl-item:nth-child(even) { transform: translateY(40px); }
  .tl-item:nth-child(even) .tl-photo,
  .tl-item:nth-child(even) .tl-card  { grid-column: 1; grid-row: auto; }
  .tl-photo, .tl-card { justify-content: center !important; }
  .tl-card-inner::before { display: none; }
  .tl-card-inner { max-width: 100%; padding: 1.4rem 1.5rem; text-align: center; }
  .avatar-wrap { width: 140px; height: 140px; }

  .tab-layout { flex-direction: column; }
}

/* ---- Móvil pequeño (≤480px) ---- */
@media (max-width: 480px) {
  header { padding: 0 .7rem; height: 58px; }
  .tab-panel { min-height: calc(100vh - 58px); }

  .logo { gap: .45rem; }
  .logo svg { width: 28px; height: 28px; }
  .logo-text { font-size: .95rem; }

  .header-toggle { width: 38px; height: 38px; }
  .header-toggle span { width: 19px; height: 2.5px; }
  .header-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .header-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .tab-nav { right: .7rem; min-width: 200px; }
  .tab-btn { padding: .65rem .9rem; font-size: .9rem; }

  #qui-som { padding: 2rem .9rem 3.5rem; }
  .section-header { margin-bottom: 2.5rem; }
  .section-header .sub { font-size: 1rem; }

  .tl-card-inner { padding: 1.2rem 1.2rem; }
  .tl-card-inner h2 { font-size: 1.35rem; }
  .tl-card-inner p { font-size: .88rem; line-height: 1.65; }
  .avatar-wrap { width: 115px; height: 115px; border-width: 4px; }

  .deco:nth-of-type(n+5) { display: none; }
}