/* =========================================================
   AIKI CENTER ETS — design system
   Palette: ai-iro (indigo tradizionale) + washi + hanko rosso
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Shippori+Mincho:wght@400;500;600;700;800&family=Zen+Kaku+Gothic+New:wght@400;500;700&display=swap');

:root{
  /* colore */
  --ai-900: #0f2438;   /* indigo profondo, quasi notte */
  --ai-800: #16334f;
  --ai-700: #204a6e;
  --ai-500: #3d6f95;
  --ai-200: #b9cddc;
  --washi:  #ece6d8;   /* carta washi, non crema-cliché: più grigio-sabbia */
  --washi-2:#f5f1e7;
  --sumi:   #1b1912;   /* inchiostro sumi, nero caldo */
  --hanko:  #a13c2e;   /* rosso sigillo vermiglio */
  --hanko-dark:#7e2e22;
  --tatami: #7c8452;   /* verde igusa, tocco discreto */

  --font-display: "Shippori Mincho", serif;
  --font-body: "Zen Kaku Gothic New", "Noto Sans", sans-serif;

  /* scala tipografica fluida: stessa formula (rem + vw) per tutti i testi,
     così crescono in proporzione tra loro su qualunque schermo */
  --fs-h1: clamp(1.9rem, 1.35rem + 2.6vw, 3.6rem);
  --fs-h2: clamp(1.4rem, 1.15rem + 1.3vw, 2.2rem);
  --fs-h3: clamp(1.05rem, 0.95rem + 0.55vw, 1.4rem);
  --fs-body: clamp(0.95rem, 0.91rem + 0.2vw, 1.05rem);
  --fs-lede: clamp(1rem, 0.92rem + 0.45vw, 1.15rem);
  --fs-small: clamp(0.78rem, 0.75rem + 0.15vw, 0.9rem);
  --fs-eyebrow: clamp(0.72rem, 0.69rem + 0.15vw, 0.8rem);
  --fs-tategaki: clamp(0.85rem, 0.65rem + 1vw, 1.4rem);
  --fs-glyph: clamp(1.9rem, 1.4rem + 2.6vw, 3rem);
  --fs-brand: clamp(0.95rem, 0.85rem + 0.5vw, 1.15rem);
  --fs-nav: clamp(0.95rem, 0.86rem + 0.5vw, 1.3rem);

  --container: 1180px;
  --radius: 2px;
}

/* schermi molto grandi (4K senza scaling OS): oltre 1920 i tetti sopra
   restavano "congelati" alla stessa dimensione — qui li alziamo */
@media (min-width: 2200px){
  :root{
    --fs-h1: clamp(3.6rem, 2.4rem + 2.2vw, 5.2rem);
    --fs-h2: clamp(2.3rem, 1.8rem + 1.1vw, 3.1rem);
    --fs-h3: clamp(1.5rem, 1.3rem + 0.5vw, 1.9rem);
    --fs-body: clamp(1.1rem, 1.02rem + 0.2vw, 1.3rem);
    --fs-lede: clamp(1.25rem, 1.1rem + 0.4vw, 1.55rem);
    --fs-small: clamp(0.95rem, 0.9rem + 0.12vw, 1.05rem);
    --fs-eyebrow: clamp(0.85rem, 0.8rem + 0.12vw, 0.95rem);
    --fs-tategaki: clamp(1.5rem, 1.2rem + 0.8vw, 1.9rem);
    --fs-glyph: clamp(3.2rem, 2.6rem + 2.2vw, 4.4rem);
    --fs-brand: clamp(1.2rem, 1.05rem + 0.4vw, 1.5rem);
    --fs-nav: clamp(1.35rem, 1.15rem + 0.4vw, 1.6rem);
    --container: 1500px;
  }
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--washi);
  color: var(--sumi);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration: none; }
h1,h2,h3,h4{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 .5em;
  color: var(--ai-900);
}
h1{ font-size: var(--fs-h1); font-weight: 700; }
h2{ font-size: var(--fs-h2); }
h3{ font-size: var(--fs-h3); }
p{ margin: 0 0 1.1em; }
strong{ color: var(--ai-900); }
.container{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
@media (prefers-reduced-motion: reduce){
  *{ animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* focus visibile ovunque */
a:focus-visible, button:focus-visible{
  outline: 2px solid var(--hanko);
  outline-offset: 3px;
}

/* =============== eyebrow / hanko marker =============== */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.6em;
  font-family: var(--font-body);
  font-size: var(--fs-eyebrow);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--hanko-dark);
  font-weight: 700;
  margin-bottom: .9em;
}
.hanko-mark{
  width: 30px; height: 30px;
  border: 2px solid var(--hanko);
  border-radius: 4px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color: var(--hanko);
  font-family: var(--font-display);
  font-size: 1rem;
  flex: none;
  transform: rotate(-3deg);
}

/* =============== banner annunci =============== */
.announce-bar{
  background: var(--hanko);
  color: var(--washi-2);
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .02em;
  text-align: center;
}
.announce-bar .container{ padding: 9px 24px; }
.announce-bar-inline{
  padding: 12px 20px;
  margin-bottom: 32px;
  border-radius: 2px;
}

/* =============== orari corso (pillole) =============== */
.schedule{
  list-style:none; margin: 10px 0 4px; padding:0;
  display:flex; flex-wrap:wrap; gap:8px;
}
.schedule li{
  background: var(--washi);
  border: 1px solid rgba(15,36,56,.16);
  color: var(--ai-800);
  font-size: .8rem; font-weight:700;
  padding: 6px 12px;
  border-radius: 2px;
}
.schedule-empty{ font-size:.85rem; color: var(--ai-500); font-style:italic; }

/* =============== griglia staff (Uchideshi / Yudansha) =============== */
.staff-grid{
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 20px;
}
.staff-card{
  background: var(--washi-2);
  border: 1px solid rgba(15,36,56,.12);
  padding: 26px 20px;
  text-align:center;
}
.staff-card img.avatar-photo{
  width: 108px; height: 108px; object-fit:cover; object-position: center 3%; border-radius:50%;
  margin: 0 auto 14px;
  border: 3px solid var(--washi-2);
  box-shadow: 0 10px 22px rgba(15,36,56,.2);
}
.avatar-fallback{
  width: 108px; height:108px; border-radius:50%;
  margin: 0 auto 14px;
  background: var(--ai-900); color: var(--washi-2);
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-display); font-size: 1.7rem;
}
.staff-card h4{
  font-family: var(--font-display); color: var(--ai-900);
  margin: 0 0 2px; font-size: 1.1rem;
}
.staff-card .role{
  color: var(--hanko-dark); font-size: .78rem; font-weight:700;
  text-transform:uppercase; letter-spacing:.06em; margin-bottom: 8px;
}
.staff-card ul.grades{
  list-style:none; padding:0; margin: 8px 0 0;
  font-size: .82rem; color: var(--ai-800);
}
.staff-card ul.grades li{ margin-bottom: 3px; }
.staff-card .qualifica{
  display:inline-block; margin-top:8px;
  font-size:.72rem; letter-spacing:.06em; text-transform:uppercase;
  color: var(--tatami); font-weight:700;
}

/* =============== header (mobile-first) =============== */
.site-header{
  position: sticky; top:0; z-index: 200;
  background: rgba(236,230,216,.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(15,36,56,.12);
}
.site-header .bar{
  display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between;
  padding: clamp(10px, 1.8vw, 16px) 24px;
  max-width: var(--container);
  margin: 0 auto;
}

/* --- brand: logo testo sempre visibile, logo simbolo solo da tablet/desktop --- */
.brand{
  order:1;
  display:flex; align-items:center; gap:10px;
  font-family: var(--font-display);
  font-weight:700; font-size: var(--fs-brand);
  color: var(--ai-900);
}
.brand .logo-mark{ display:none; }
.brand .logo-mark, .brand .logo-text{ height: clamp(30px, 6.5vw, 40px); width:auto; }

/* --- hamburger: visibile di default (mobile) --- */
.nav-toggle{
  order:2;
  display:block;
  background:none; border:none; cursor:pointer;
  width:42px; height:42px;
  position:relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:""; position:absolute; left:9px; right:9px; height:2px; background: var(--ai-900);
  transition: transform .25s ease, opacity .25s ease;
}
.nav-toggle span{ top:20px; }
.nav-toggle span::before{ top:-8px; }
.nav-toggle span::after{ top:8px; }
.nav-toggle.open span{ background: transparent; }
.nav-toggle.open span::before{ left:6px; right:6px; transform: translateY(8px) rotate(45deg); }
.nav-toggle.open span::after{ left:6px; right:6px; transform: translateY(-8px) rotate(-45deg); }

/* --- nav: accordion verticale sotto la barra, chiuso di default --- */
nav.main-nav{
  order:3;
  flex-basis: 100%;
  max-height: 0;
  overflow:hidden;
  transition: max-height .3s ease;
}
nav.main-nav.open{ max-height: 70vh; overflow-y:auto; }
nav.main-nav > ul{
  list-style:none; display:flex; flex-direction:column; gap:2px;
  margin:0; padding: 6px 2px 22px;
}
nav.main-nav a{
  display:block;
  padding: 12px 8px;
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--ai-800);
  position:relative;
}

/* --- dropdown "Corsi": su mobile è una lista che si apre a tap, sotto la voce --- */
.has-dropdown{ position:relative; }
.dropdown{
  list-style:none; margin:0; padding:2px 0 6px 14px;
  display:none;
}
.has-dropdown.open .dropdown{ display:block; }
.dropdown a{ padding: 10px 8px; font-size:.95rem; }
.dropdown a:hover{ color: var(--hanko-dark); }

/* =============== da tablet/desktop in su =============== */
@media (min-width: 881px){
  .brand .logo-mark{ display:block; height: clamp(34px, 3.4vw, 46px); width:auto; }

  .site-header .bar{ flex-wrap:nowrap; }
  .nav-toggle{ display:none; }

  nav.main-nav{
    order:2; flex-basis:auto;
    max-height:none; overflow:visible;
  }
  nav.main-nav > ul{ flex-direction:row; gap:2px; padding:0; }
  nav.main-nav a{
    font-size: var(--fs-nav); padding: 10px 16px;
  }
  nav.main-nav a::after{
    content:"";
    position:absolute; left:16px; right:16px; bottom:6px; height:2px;
    background: var(--hanko);
    transform: scaleX(0); transform-origin: left;
    transition: transform .25s ease;
  }
  nav.main-nav a:hover::after, nav.main-nav a.active::after{ transform: scaleX(1); }

  .dropdown{
    padding:8px 0;
    position:absolute; top:100%; left:0;
    min-width:200px;
    background: var(--washi-2);
    border:1px solid rgba(15,36,56,.14);
    box-shadow: 0 12px 28px rgba(15,36,56,.14);
    opacity:0; visibility:hidden; transform: translateY(6px);
    transition: all .2s ease;
    display:block;
  }
  .has-dropdown:hover .dropdown,
  .has-dropdown:focus-within .dropdown{
    opacity:1; visibility:visible; transform: translateY(0);
  }
  .dropdown a::after{ display:none; }
  .dropdown a{ padding: 10px 18px; font-size: var(--fs-nav); }
  .dropdown a:hover{ background: rgba(161,60,46,.08); color: var(--hanko-dark); }
}


@media (min-width: 2200px){
  .brand .logo-mark, .brand .logo-text{ height: clamp(46px, 2.6vw, 58px); }
  .master-photo{ max-width: 420px; }
  .school-mark{ max-width: clamp(194px, 10.6vw, 246px); }
}

/* =============== bottoni =============== */
.btn{
  display:inline-flex; align-items:center; gap:.5em;
  padding: 14px 30px;
  font-family: var(--font-body);
  font-weight:700; font-size:.95rem;
  letter-spacing:.02em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor:pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn-primary{
  background: var(--hanko); color: var(--washi-2);
  box-shadow: 0 6px 0 var(--hanko-dark);
}
.btn-primary:hover{ transform: translateY(2px); box-shadow: 0 4px 0 var(--hanko-dark); }
.btn-ghost{
  background: transparent; color: var(--ai-900); border-color: var(--ai-900);
}
.btn-ghost:hover{ background: var(--ai-900); color: var(--washi-2); }

/* stamp-in animation per elementi con data-stamp */
.stamp{ opacity:0; transform: scale(1.4) rotate(-8deg); }
.stamp.is-in{
  animation: stampIn .5s cubic-bezier(.2,1.4,.4,1) forwards;
}
@keyframes stampIn{
  0%{ opacity:0; transform: scale(1.6) rotate(-10deg); }
  60%{ opacity:1; transform: scale(.94) rotate(2deg); }
  100%{ opacity:1; transform: scale(1) rotate(0); }
}
.reveal{ opacity:0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-in{ opacity:1; transform:none; }

/* =============== hero =============== */
.hero{
  position:relative;
  min-height: 92vh;
  display:flex; align-items:flex-end;
  overflow:hidden;
  color: var(--washi-2);
  background: var(--ai-900);
}
.hero video, .hero .hero-fallback{
  position:absolute; inset:0; width:100%; height:100%; object-fit:cover;
  filter: saturate(0.75) brightness(.55);
}
.hero::before{
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(15,36,56,.35) 0%, rgba(15,36,56,.35) 40%, rgba(15,36,56,.92) 100%);
}
.hero-inner{
  position:relative; z-index:2;
  padding: 60px 24px 72px;
  max-width: var(--container);
  margin: 0 auto;
  width:100%;
}
.hero-tategaki{
  position:absolute; top: clamp(70px, 11vh, 130px); right: clamp(14px, 4vw, 40px); z-index:2;
  writing-mode: vertical-rl;
  font-family: var(--font-display);
  font-size: var(--fs-tategaki); letter-spacing:.3em;
  color: rgba(245,241,231,.55);
  pointer-events:none;
}
.hero h1{ color: var(--washi-2); max-width: 16ch; }
.hero .lede{ font-size: var(--fs-lede); max-width:46ch; color: var(--washi); opacity:.9; }
.hero-cta{ display:flex; gap:14px; flex-wrap:wrap; margin-top: 28px; }

@media (max-width: 640px){
  .hero{ min-height: 82vh; align-items:flex-end; }
}

/* =============== sezioni generiche =============== */
section{ padding: 88px 0; }
section.tight{ padding: 56px 0; }
.section-head{ max-width: 60ch; margin-bottom: 44px; }
.section-alt{ background: var(--washi-2); }

.school-intro-text{ max-width: 60ch; }
.school-mark{ display:none; }
@media (min-width: 881px){
  .school-intro{
    display:grid; grid-template-columns: 2fr 1fr;
    gap: 48px; align-items:center;
  }
  .school-mark{
    display:block;
    width: 100%;
    max-width: clamp(119px, 11.9vw, 187px);
    height:auto;
    margin: 0 auto;
    opacity:.92;
  }
}
.section-dark{ background: var(--ai-900); color: var(--washi); }
.section-dark h2, .section-dark h3{ color: var(--washi-2); }
.section-dark .eyebrow{ color: var(--tatami); }

/* divisore a listello (ispirato ai listelli dello shoji) */
.slats{ display:flex; gap:6px; margin: 40px 0; }
.slats span{ height:2px; flex:1; background: rgba(15,36,56,.18); }
.slats span:nth-child(3n){ background: var(--hanko); flex:.4; }

/* =============== griglia corsi tipo tatami =============== */
.tatami-grid{
  display:grid;
  gap: 18px;
  grid-template-columns: repeat(6, 1fr);
}
.tatami-grid .card{ grid-column: span 3; }
.tatami-grid .card:nth-child(3n+1){ grid-column: span 4; }
.tatami-grid .card:nth-child(3n+2){ grid-column: span 2; }
.tatami-grid .card:nth-child(3n){ grid-column: span 6; }
@media (max-width: 780px){
  .tatami-grid{ grid-template-columns: 1fr; }
  .tatami-grid .card{ grid-column: auto !important; }
}

.card{
  background: var(--washi-2);
  border: 1px solid rgba(15,36,56,.12);
  padding: 30px;
  display:flex; flex-direction:column; gap:10px;
}
.card .btn{ align-self: flex-start; }
.card .age{
  font-family: var(--font-display); color: var(--hanko);
  font-size: var(--fs-nav); font-weight:600;
}
.card ul{ margin:.4em 0 0; padding-left: 1.1em; font-size:.92rem; color: var(--ai-800); }
.card li{ margin-bottom:.35em; }

/* =============== staff / maestro =============== */
.master{
  display:grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items:center;
}
.lineage-img{
  border: 6px solid var(--washi-2);
  box-shadow: 0 18px 40px rgba(15,36,56,.2);
  width: 100%;
}
.master-photo{ max-width: 320px; margin: 0 auto; }
.master-photo img, img.maestro-photo{
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center 15%;
  border: 6px solid var(--washi-2);
  box-shadow: 0 18px 40px rgba(15,36,56,.25);
}
img.maestro-photo{ max-width: 320px; margin: 0 auto; }
@media (max-width: 880px){
  .master{ grid-template-columns: 1fr; }
  .master-photo{ margin-bottom: 20px; }
  .lineage-img{ margin-top: 8px; }
}
@media (max-width: 480px){
  .master-photo, img.maestro-photo{ max-width: 220px; }
}

/* =============== kanji triade =============== */
.kanji-row{
  display:grid; grid-template-columns: repeat(3,1fr); gap: 20px;
}
.kanji-card{ text-align:center; padding: 26px 14px; border:1px solid rgba(245,241,231,.18); }
.kanji-card .glyph{ font-family: var(--font-display); font-size: var(--fs-glyph); color: var(--hanko); }
.kanji-card .romaji{ font-weight:700; margin-top:.3em; }
@media (max-width: 640px){ .kanji-row{ grid-template-columns: 1fr; } }

/* =============== footer =============== */
.site-footer{ background: var(--sumi); color: var(--washi); padding: 56px 0 26px; }
.footer-grid{
  display:grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 36px;
  padding-bottom: 32px; border-bottom: 1px solid rgba(245,241,231,.14);
}
.footer-grid h4{ color: var(--washi-2); font-size:.85rem; letter-spacing:.1em; text-transform:uppercase; font-family: var(--font-body); }
.footer-grid a{ display:block; color: rgba(245,241,231,.75); padding: 5px 0; font-size:.95rem; }
.footer-grid a:hover{ color: var(--hanko); }
.footer-bottom{
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
  padding-top: 22px; font-size:.8rem; color: rgba(245,241,231,.5);
}
@media (min-width: 781px){
  .footer-grid > div:nth-child(2){ text-align:center; }
  .footer-grid > div:nth-child(3){ text-align:right; }
}
@media (max-width: 780px){ .footer-grid{ grid-template-columns: 1fr; } }

/* =============== quote / filosofia =============== */
.pull-quote{
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 1rem + 1vw, 1.7rem);
  color: var(--ai-900);
  border-left: 3px solid var(--hanko);
  padding-left: 24px;
  max-width: 62ch;
}

/* =============== contenuto legale (Termini e Condizioni) =============== */
.legal-content{
  max-width: 70ch;
}
.legal-content h2{
  margin-top: 1.6em;
  font-size: var(--fs-h3);
}
.legal-content ul, .legal-content ol{
  padding-left: 1.3em;
}
.legal-content li{ margin-bottom: .5em; }
.legal-content a{ text-decoration: underline; }
.legal-content a:hover{ color: var(--hanko); }

/* =============== form preiscrizione (Google Form incorporato) =============== */
.form-frame{
  max-width: 720px;
  margin: 0 auto;
  background: var(--washi-2);
  border: 1px solid rgba(15,36,56,.12);
  box-shadow: 0 18px 40px rgba(15,36,56,.12);
  padding: 4px;
}
.form-frame iframe{
  display:block;
  width: 100%;
  height: 1300px;
  border: none;
}
@media (max-width: 640px){
  .form-frame iframe{ height: 1900px; }
}

/* pagina interna: banner titolo */
.page-banner{
  background: var(--ai-900); color: var(--washi-2);
  padding: 64px 0 48px;
}
.page-banner h1{ color: var(--washi-2); }
.breadcrumb{ font-size:.85rem; color: var(--ai-200); margin-bottom: 12px; }