/* ============================================================
   〔老師姓名〕鋼琴・幼兒音樂教室 — 共用樣式
   視覺系統：編輯式雅緻 — 象牙紙底 · 暖墨黑 · 黃銅單一強調
   ============================================================ */

:root{
  --bg:      oklch(97.6% 0.006 85);
  --surface: oklch(99.4% 0.003 85);
  --fg:      oklch(22% 0.012 60);
  --muted:   oklch(52% 0.012 65);
  --border:  oklch(89% 0.008 85);
  --accent:  oklch(45% 0.075 70);

  --accent-soft: oklch(74% 0.085 78);           /* 深色底上的黃銅 */
  --accent-tint: color-mix(in oklch, var(--accent) 6%, var(--bg));
  --ink-soft:    color-mix(in oklch, var(--fg) 82%, var(--bg));
  --hairline:    color-mix(in oklch, var(--fg) 11%, var(--bg));
  --ink-panel:   oklch(18% 0.012 55);

  --font-display: 'Playfair Display','Noto Serif TC','Songti TC','Iowan Old Style',Georgia,serif;
  --font-body: 'Noto Sans TC',-apple-system,BlinkMacSystemFont,'PingFang TC','Microsoft JhengHei',system-ui,sans-serif;
  --font-label: 'Montserrat','Noto Sans TC',-apple-system,'PingFang TC','Microsoft JhengHei',system-ui,sans-serif;

  --maxw: 1200px;
  --gutter: clamp(1.35rem, 5vw, 4.5rem);
  --section: clamp(5rem, 11vw, 10rem);

  --radius: 0px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; color-scheme:light; }
body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family:var(--font-body);
  font-size:1.0625rem;
  line-height:1.78;
  font-weight:400;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
button{ font:inherit; color:inherit; }
h1,h2,h3,h4,p,ul,ol,figure,blockquote{ margin:0; }
ul,ol{ padding:0; list-style:none; }
::selection{ background:color-mix(in oklch, var(--accent) 18%, var(--bg)); }

:focus-visible{ outline:1.5px solid var(--accent); outline-offset:4px; }

.wrap{ width:100%; max-width:var(--maxw); margin-inline:auto; padding-inline:var(--gutter); }

/* ---------- Typography ---------- */
.display{
  font-family:var(--font-display);
  font-weight:400;
  line-height:1.06;
  letter-spacing:-0.005em;
}
h1.display{ font-size:clamp(2.6rem, 6.2vw, 4.6rem); }
h2.display{ font-size:clamp(2.05rem, 4.3vw, 3.4rem); }
h3{
  font-family:var(--font-display);
  font-size:clamp(1.35rem, 2vw, 1.75rem);
  font-weight:500; line-height:1.28; letter-spacing:-0.002em;
}
.lede{
  font-size:clamp(1.08rem, 1.7vw, 1.36rem);
  font-weight:300;
  color:var(--ink-soft);
  line-height:1.72;
  max-width:52ch;
}
.muted{ color:var(--muted); }
.small{ font-size:.86rem; letter-spacing:.02em; }

.eyebrow{
  font-family:var(--font-label);
  font-size:.7rem;
  font-weight:500;
  text-transform:uppercase;
  letter-spacing:.24em;
  color:var(--accent);
  display:inline-flex;
  align-items:center;
  gap:.85em;
  margin-bottom:1.7rem;
}
.eyebrow::before{
  content:"";
  width:2.2em; height:1px;
  background:currentColor;
  opacity:.7;
}
.eyebrow.center::before{ display:none; }

/* ---------- Buttons ---------- */
.btn-row{ display:flex; flex-wrap:wrap; gap:1rem; align-items:center; }
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:.6rem;
  min-height:52px; padding:.85rem 1.7rem;
  border:1px solid transparent; border-radius:0;
  font-weight:400; font-size:.95rem; letter-spacing:.06em;
  cursor:pointer;
  transition:transform .3s var(--ease), background .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease);
}
.btn svg{ width:17px; height:17px; flex:none; }
.btn-primary{ background:var(--fg); color:var(--bg); }
.btn-primary:hover{ background:var(--accent); transform:translateY(-1px); }
.btn-primary:active{ transform:translateY(0); }
.btn-ghost{ background:transparent; border-color:var(--border); color:var(--fg); }
.btn-ghost:hover{ border-color:var(--fg); background:var(--surface); }
.btn-link{
  display:inline-flex; align-items:center; gap:.5rem;
  font-weight:400; letter-spacing:.05em; color:var(--fg);
  border-bottom:1px solid var(--border);
  padding-bottom:3px; min-height:0;
  transition:color .25s var(--ease), border-color .25s var(--ease);
}
.btn-link:hover{ color:var(--accent); border-color:var(--accent); }
.btn-link svg{ width:15px; height:15px; }

/* ---------- Header ---------- */
.site-header{
  position:sticky; top:0; z-index:60;
  background:color-mix(in oklch, var(--bg) 86%, transparent);
  backdrop-filter:saturate(140%) blur(12px);
  border-bottom:1px solid var(--border);
}
.nav{ display:flex; align-items:center; justify-content:space-between; gap:2rem; min-height:84px; }
.brand{ display:flex; align-items:center; gap:.85rem; }
.brand-mark{ width:34px; height:34px; flex:none; display:block; object-fit:contain; }
.brand-mark svg{ width:100%; height:100%; display:block; }
.site-header .brand-mark{ mix-blend-mode:multiply; }
.site-footer .brand-mark{ filter:invert(1); mix-blend-mode:screen; }
.brand-text{ display:flex; flex-direction:column; line-height:1.1; }
.brand-text.brand-text--plain{ line-height:1.2; }
.brand-name{ font-family:var(--font-display); font-weight:500; font-size:1.32rem; letter-spacing:.02em; }
.brand-sub{ font-family:var(--font-label); font-size:.6rem; letter-spacing:.3em; text-transform:uppercase; color:var(--muted); margin-top:2px; }

.nav-links{ display:flex; align-items:center; gap:2.4rem; }
.nav-link{
  font-size:.9rem; font-weight:400; letter-spacing:.06em; color:var(--ink-soft);
  padding:.35rem 0; position:relative;
}
.nav-link::after{
  content:""; position:absolute; left:0; right:100%; bottom:-2px; height:1px;
  background:var(--accent); transition:right .3s var(--ease);
}
.nav-link:hover{ color:var(--fg); }
.nav-link:hover::after{ right:0; }
.nav-link[aria-current="page"]{ color:var(--fg); }
.nav-link[aria-current="page"]::after{ right:0; }
.nav-cta{ padding:.7rem 1.3rem; min-height:46px; font-size:.86rem; }

.nav-toggle{
  display:none; width:48px; height:48px; border:1px solid var(--border);
  background:transparent; border-radius:0;
  align-items:center; justify-content:center; cursor:pointer;
}
.nav-toggle span{ display:block; width:20px; height:1.4px; background:var(--fg); position:relative; }
.nav-toggle span::before,.nav-toggle span::after{
  content:""; position:absolute; left:0; width:20px; height:1.4px; background:var(--fg);
  transition:transform .25s var(--ease);
}
.nav-toggle span::before{ top:-6px; }
.nav-toggle span::after{ top:6px; }
.nav-toggle[aria-expanded="true"] span{ background:transparent; }
.nav-toggle[aria-expanded="true"] span::before{ transform:translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after{ transform:translateY(-6px) rotate(-45deg); }

/* ---------- Sections ---------- */
.section{ padding-block:var(--section); }
.section--tight{ padding-block:clamp(3.5rem,7vw,6rem); }
.section-head{ max-width:60ch; margin-bottom:clamp(3rem,6vw,5rem); }
.section-head.center{ margin-inline:auto; text-align:center; }
.section-head p{ margin-top:1.4rem; }

.rule{ height:1px; background:var(--border); border:0; }

/* ---------- Hero ---------- */
.hero{ padding-top:clamp(3.5rem,8vw,7rem); padding-bottom:clamp(4rem,8vw,7rem); }
.hero-inner{
  display:grid; grid-template-columns:1.1fr .9fr; gap:clamp(2.5rem,6vw,6rem);
  align-items:center;
}
.hero-copy h1{ margin-bottom:1.9rem; }
.hero-copy .lede{ margin-bottom:2.6rem; }
.hero-media{ position:relative; }

.cred-strip{
  margin-top:clamp(4rem,8vw,6rem);
  border-top:1px solid var(--border);
  display:grid; grid-template-columns:repeat(4,1fr); gap:2rem;
  padding-top:2.2rem;
}
.cred-item{ display:flex; flex-direction:column; gap:.5rem; }
.cred-item .k{ font-family:var(--font-label); font-size:.64rem; letter-spacing:.24em; text-transform:uppercase; color:var(--muted); }
.cred-item .v{ font-family:var(--font-display); font-size:1.15rem; font-weight:500; line-height:1.35; letter-spacing:.01em; }

/* ---------- Photo placeholders ---------- */
.photo-ph{
  position:relative; width:100%; background:color-mix(in oklch, var(--fg) 3.5%, var(--bg));
  border:1px solid var(--border); border-radius:0;
  display:grid; place-items:center; overflow:hidden; color:var(--muted);
}
.photo-ph::after{
  content:""; position:absolute; inset:13px;
  border:1px solid color-mix(in oklch, var(--accent) 26%, var(--border));
  pointer-events:none;
}
.photo-ph .ph-inner{ position:relative; text-align:center; padding:2rem; display:grid; gap:.6rem; justify-items:center; }
.photo-ph .ph-icon{ width:30px; height:30px; color:color-mix(in oklch, var(--accent) 65%, var(--muted)); }
.photo-ph .ph-label{ font-family:var(--font-label); font-size:.66rem; letter-spacing:.26em; text-transform:uppercase; color:var(--ink-soft); }
.photo-ph .ph-note{ font-size:.76rem; color:var(--muted); max-width:24ch; line-height:1.55; }
.photo-portrait{ aspect-ratio:3/4; }
.photo-wide{ aspect-ratio:16/10; }
.photo-square{ aspect-ratio:1/1; }

/* ---------- Quote ---------- */
.quote-block{ background:var(--surface); border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.quote{ max-width:48rem; margin-inline:auto; text-align:center; }
.quote p{
  font-family:var(--font-display); font-weight:400;
  font-size:clamp(1.85rem, 4vw, 3.1rem); line-height:1.34; letter-spacing:-0.005em;
}
.quote cite{ display:block; margin-top:2rem; font-style:normal; font-family:var(--font-label); font-size:.68rem; letter-spacing:.28em; text-transform:uppercase; color:var(--accent); }

/* ---------- Principle / cards ---------- */
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:0; border-top:1px solid var(--border); }
.grid-2{ display:grid; grid-template-columns:repeat(2,1fr); gap:clamp(2.5rem,5vw,5rem); }
.principle{ padding:clamp(2.25rem,4vw,3.25rem) clamp(1.75rem,3.5vw,3rem) clamp(2.25rem,4vw,3.25rem) 0; border-bottom:1px solid var(--border); }
.principle + .principle{ padding-left:clamp(1.75rem,3.5vw,3rem); border-left:1px solid var(--border); }
.principle .p-idx{ font-family:var(--font-display); font-size:1.05rem; color:var(--accent); display:block; margin-bottom:1.4rem; letter-spacing:.04em; }
.principle h3{ margin-bottom:.9rem; }
.principle p{ color:var(--ink-soft); font-size:.95rem; line-height:1.75; }

/* ---------- Course cards ---------- */
.course-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:clamp(1.5rem,3vw,2.5rem); }
.course-card{
  display:flex; flex-direction:column;
  background:transparent; border:0; border-top:1px solid var(--border);
  padding:0 0 1.5rem; transition:border-color .35s var(--ease), transform .35s var(--ease);
}
.course-card:hover{ border-top-color:var(--accent); transform:translateY(-4px); }
.course-card .photo-ph{ margin-top:1.5rem; }
.course-body{ padding:1.6rem 0 0; display:flex; flex-direction:column; gap:.7rem; flex:1; }
.course-tag{ font-family:var(--font-label); font-size:.64rem; letter-spacing:.24em; text-transform:uppercase; color:var(--muted); }
.course-body h3{ font-size:1.45rem; }
.course-body p{ color:var(--ink-soft); font-size:.93rem; flex:1; line-height:1.72; }
.course-meta{ display:flex; gap:1.2rem; font-family:var(--font-label); font-size:.68rem; letter-spacing:.1em; color:var(--accent); margin-top:.5rem; text-transform:uppercase; }

/* ---------- Stats ---------- */
.stats-band{ background:var(--ink-panel); color:var(--bg); border-top:1px solid color-mix(in oklch, var(--accent-soft) 30%, transparent); }
.stats-band .eyebrow{ color:var(--accent-soft); }
.stats-band .stats{ display:grid; grid-template-columns:repeat(3,1fr); border-top:1px solid color-mix(in oklch, var(--bg) 16%, var(--ink-panel)); margin-top:3.5rem; }
.stat{ padding:3rem 2rem 3rem 0; }
.stat + .stat{ padding-left:2.5rem; border-left:1px solid color-mix(in oklch, var(--bg) 16%, var(--ink-panel)); }
.stat-num{ font-family:var(--font-display); font-size:clamp(3rem,6vw,4.4rem); font-weight:400; line-height:.95; letter-spacing:-0.01em; color:var(--accent-soft); font-variant-numeric:tabular-nums; }
.stat-label{ font-size:.9rem; margin-top:1.3rem; color:color-mix(in oklch, var(--bg) 74%, var(--ink-panel)); max-width:22ch; line-height:1.65; }

/* ---------- CTA banner ---------- */
.cta-banner{
  background:var(--ink-panel); color:var(--bg);
  border:0; border-radius:0;
  padding:clamp(3rem,6vw,5rem);
  display:grid; grid-template-columns:1.5fr auto; gap:2.5rem; align-items:center;
}
.cta-banner h2{ font-size:clamp(1.8rem,3.2vw,2.6rem); margin-bottom:1rem; color:var(--bg); }
.cta-banner p{ color:color-mix(in oklch, var(--bg) 72%, var(--ink-panel)); max-width:46ch; }
.cta-banner .btn-primary{ background:var(--bg); color:var(--ink-panel); }
.cta-banner .btn-primary:hover{ background:var(--accent-soft); color:var(--ink-panel); }

/* ---------- Page hero ---------- */
.page-hero{ padding-top:clamp(3.5rem,7vw,6rem); padding-bottom:clamp(3rem,6vw,5rem); border-bottom:1px solid var(--border); }
.page-hero .lede{ margin-top:1.7rem; }

/* ---------- Prose ---------- */
.prose{ max-width:66ch; display:grid; gap:1.5rem; }
.prose p{ color:var(--ink-soft); }
.prose strong{ color:var(--fg); font-weight:500; }

/* ---------- Qualification list ---------- */
.qual-list{ display:grid; gap:0; border-top:1px solid var(--border); }
.qual{ display:grid; grid-template-columns:auto 1fr; gap:2.5rem; padding:2.1rem 0; border-bottom:1px solid var(--border); align-items:baseline; }
.qual .q-no{ font-family:var(--font-display); font-size:1.15rem; color:var(--accent); letter-spacing:.05em; }
.qual h3{ font-size:1.28rem; margin-bottom:.5rem; }
.qual p{ color:var(--muted); font-size:.92rem; line-height:1.72; }

/* ---------- Course detail ---------- */
.course-detail{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(2.5rem,5vw,5rem); align-items:center; padding-block:clamp(3rem,6vw,5rem); border-bottom:1px solid var(--border); }
.course-detail.flip .course-media{ order:2; }
.course-detail h3{ font-size:clamp(1.7rem,3vw,2.35rem); margin-bottom:1.2rem; }
.course-detail .subtag{ font-family:var(--font-label); font-size:.66rem; letter-spacing:.26em; text-transform:uppercase; color:var(--accent); display:block; margin-bottom:1.3rem; }
.course-detail ul.feat{ display:grid; gap:.75rem; margin-top:1.7rem; }
.course-detail ul.feat li{ position:relative; padding-left:1.6rem; color:var(--ink-soft); font-size:.95rem; }
.course-detail ul.feat li::before{ content:""; position:absolute; left:0; top:.72em; width:9px; height:1px; background:var(--accent); }

/* ---------- FAQ ---------- */
.faq{ border-top:1px solid var(--border); }
.faq-item{ border-bottom:1px solid var(--border); }
.faq-q{
  width:100%; background:none; border:0; cursor:pointer; text-align:left;
  display:flex; align-items:center; justify-content:space-between; gap:2rem;
  padding:1.9rem 0; font-family:var(--font-display);
  font-size:clamp(1.15rem,1.9vw,1.4rem); font-weight:500; letter-spacing:.005em;
}
.faq-q .plus{ width:16px; height:16px; flex:none; position:relative; }
.faq-q .plus::before,.faq-q .plus::after{ content:""; position:absolute; background:var(--accent); transition:transform .3s var(--ease); }
.faq-q .plus::before{ left:0; top:7.5px; width:16px; height:1px; }
.faq-q .plus::after{ left:7.5px; top:0; width:1px; height:16px; }
.faq-item.open .faq-q .plus::after{ transform:scaleY(0); }
.faq-a{ overflow:hidden; height:0; transition:height .35s var(--ease); }
.faq-a-inner{ padding:0 3.5rem 2rem 0; color:var(--ink-soft); max-width:64ch; line-height:1.78; }

/* ---------- Contact ---------- */
.contact-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:0 clamp(2rem,4vw,4rem); }
.contact-card{
  display:flex; gap:1.4rem; align-items:flex-start;
  width:100%; font:inherit; color:inherit; text-align:left; cursor:pointer;
  background:transparent; border:0; border-top:1px solid var(--border); border-radius:0;
  padding:2rem 0; transition:border-color .35s var(--ease), transform .35s var(--ease);
}
.contact-card:hover{ border-top-color:var(--accent); }
.contact-card .c-icon{ width:42px; height:42px; flex:none; display:grid; place-items:center; color:var(--accent); }
.contact-card .c-icon svg{ width:22px; height:22px; }
.contact-card h3{ font-size:1.22rem; margin-bottom:.35rem; }
.contact-card p{ font-size:.85rem; color:var(--muted); }
.contact-card .c-val{ font-family:var(--font-display); color:var(--fg); font-size:1.05rem; margin-top:.5rem; word-break:break-word; letter-spacing:.01em; }

/* ---------- Note ---------- */
.form-note{ font-size:.8rem; color:var(--muted); line-height:1.6; }

/* ---------- Info block ---------- */
.info-block{ display:grid; gap:1.9rem; }
.info-row{ display:grid; grid-template-columns:auto 1fr; gap:1.8rem; padding-bottom:1.7rem; border-bottom:1px solid var(--border); }
.info-row .i-k{ font-family:var(--font-label); font-size:.66rem; letter-spacing:.2em; text-transform:uppercase; color:var(--muted); padding-top:.35rem; min-width:6rem; }
.info-row .i-v{ font-size:.98rem; line-height:1.7; }
.info-row .i-v .muted{ font-size:.86rem; display:block; margin-top:.35rem; }

/* ---------- WeChat modal ---------- */
.modal{ position:fixed; inset:0; z-index:100; display:grid; place-items:center; padding:1.5rem; }
.modal[hidden]{ display:none; }
.modal-backdrop{ position:absolute; inset:0; background:color-mix(in oklch, var(--ink-panel) 60%, transparent); -webkit-backdrop-filter:blur(4px); backdrop-filter:blur(4px); }
.modal-panel{
  position:relative; z-index:1; width:min(420px, 100%);
  background:var(--surface); border:1px solid var(--border);
  padding:clamp(2rem,5vw,2.75rem); text-align:center;
  max-height:calc(100vh - 3rem); overflow:auto;
  animation:modal-in .35s var(--ease);
}
@keyframes modal-in{ from{ opacity:0; transform:translateY(14px); } to{ opacity:1; transform:none; } }
@media (prefers-reduced-motion:reduce){ .modal-panel{ animation:none; } }
.modal-panel .eyebrow{ justify-content:center; }
.modal-panel h3{ font-size:1.55rem; margin-bottom:.7rem; }
.modal-panel > p.muted{ max-width:32ch; margin:0 auto 1.9rem; font-size:.9rem; }
.modal-close{
  position:absolute; top:.7rem; right:.7rem; width:42px; height:42px;
  border:0; background:none; cursor:pointer; color:var(--muted);
  font-size:1.6rem; line-height:1; display:grid; place-items:center;
}
.modal-close:hover{ color:var(--fg); }

.qr-frame{
  position:relative; width:min(232px, 62vw); aspect-ratio:1/1; margin:0 auto 1.7rem;
  border:1px solid var(--border); background:#fff; display:grid; place-items:center; overflow:hidden;
}
.qr-frame::before,.qr-frame::after{
  content:""; position:absolute; width:18px; height:18px; border:1px solid var(--accent); pointer-events:none;
}
.qr-frame::before{ top:8px; left:8px; border-right:0; border-bottom:0; }
.qr-frame::after{ bottom:8px; right:8px; border-left:0; border-top:0; }
.qr-frame img{ width:100%; height:100%; object-fit:contain; display:block; }
.qr-placeholder{ display:none; padding:1.5rem; justify-items:center; gap:.6rem; }
.qr-frame.missing .qr-placeholder{ display:grid; }
.qr-frame.missing img{ display:none; }
.qr-placeholder svg{ width:30px; height:30px; color:var(--accent); }
.qr-placeholder .ph-label{ font-family:var(--font-label); font-size:.66rem; letter-spacing:.24em; text-transform:uppercase; color:var(--ink-soft); }
.qr-placeholder .ph-note{ font-size:.74rem; color:var(--muted); line-height:1.55; max-width:24ch; }

.wechat-id{
  display:flex; align-items:center; justify-content:center; gap:.8rem; flex-wrap:wrap;
  border:1px solid var(--border); padding:.75rem 1rem; margin-bottom:1.5rem;
}
.wechat-id .wid-label{ font-family:var(--font-label); font-size:.6rem; letter-spacing:.22em; text-transform:uppercase; color:var(--muted); }
.wechat-id code{ font-family:var(--font-label); font-size:.98rem; color:var(--fg); letter-spacing:.02em; }
.btn-copy{ min-height:40px; padding:.4rem 1rem; font-size:.82rem; letter-spacing:.05em; transition:color .25s var(--ease), border-color .25s var(--ease); }
.btn-copy.copied{ color:var(--accent); border-color:var(--accent); }
.modal-panel .btn-row{ justify-content:center; }
.modal-panel #save-qr.is-disabled{ opacity:.45; pointer-events:none; }
body.no-scroll{ overflow:hidden; }

/* ---------- Footer ---------- */
.site-footer{ background:var(--ink-panel); color:var(--bg); padding-block:clamp(4rem,7vw,6rem) 2.5rem; }
.footer-grid{ display:grid; grid-template-columns:1.7fr 1fr 1fr; gap:3rem; }
.site-footer .brand-mark{ color:var(--accent-soft); }
.site-footer .brand-name{ color:var(--bg); }
.site-footer .brand-sub{ color:color-mix(in oklch, var(--bg) 58%, var(--ink-panel)); }
.footer-tag{ color:color-mix(in oklch, var(--bg) 70%, var(--ink-panel)); font-size:.9rem; max-width:34ch; margin-top:1.7rem; line-height:1.75; }
.footer-col h4{ font-family:var(--font-label); font-size:.64rem; letter-spacing:.24em; text-transform:uppercase; color:color-mix(in oklch, var(--bg) 55%, var(--ink-panel)); margin-bottom:1.4rem; font-weight:500; }
.footer-col a{ display:block; padding:.42rem 0; font-size:.9rem; color:color-mix(in oklch, var(--bg) 86%, var(--ink-panel)); transition:color .25s var(--ease); }
.footer-col a:hover{ color:var(--accent-soft); }
.footer-bottom{
  margin-top:clamp(3rem,6vw,4.5rem); padding-top:1.8rem;
  border-top:1px solid color-mix(in oklch, var(--bg) 14%, var(--ink-panel));
  display:flex; flex-wrap:wrap; gap:1rem; justify-content:space-between;
  font-size:.72rem; color:color-mix(in oklch, var(--bg) 56%, var(--ink-panel));
  font-family:var(--font-label); letter-spacing:.08em;
}

/* ---------- Reveal ---------- */
.reveal{ opacity:0; transform:translateY(16px); transition:opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.is-in{ opacity:1; transform:none; }

/* ---------- Hover micro-interactions ---------- */
@media (hover:hover){
  .contact-card:hover{ transform:translateY(-3px); }
  .contact-card .c-icon{ transition:transform .3s var(--ease); }
  .contact-card:hover .c-icon{ transform:translateY(-2px); }
  .photo-ph img{ transition:transform .6s var(--ease); }
  .course-card:hover .photo-ph img{ transform:scale(1.05); }
  .photo-ph .ph-icon{ transition:transform .4s var(--ease); }
  .course-card:hover .photo-ph .ph-icon{ transform:translateY(-2px) scale(1.06); }
  .course-card .photo-ph{ transition:border-color .4s var(--ease); }
  .course-card:hover .photo-ph{ border-color:color-mix(in oklch, var(--accent) 40%, var(--border)); }
  .btn-link svg{ transition:transform .25s var(--ease); }
  .btn-link:hover svg{ transform:translateX(3px); }
}

/* ---------- Piano keys (CTA decoration) ---------- */
.piano{ grid-column:1 / -1; padding-top:1.5rem; border-top:1px solid color-mix(in oklch, var(--bg) 14%, var(--ink-panel)); }
.piano-keys{ position:relative; display:flex; height:60px; border:1px solid color-mix(in oklch, var(--bg) 18%, var(--ink-panel)); }
.pk{ cursor:pointer; }
.pk-white{ position:relative; flex:1 1 0; background:color-mix(in oklch, var(--bg) 94%, var(--ink-panel)); border-right:1px solid color-mix(in oklch, var(--ink-panel) 28%, var(--bg)); transform-origin:top center; transition:transform .12s var(--ease), background .18s var(--ease); }
.pk-white:last-child{ border-right:0; }
.pk-black{ position:absolute; top:0; width:6.4%; height:62%; transform:translateX(-50%); background:var(--ink-panel); border:1px solid color-mix(in oklch, var(--ink-panel) 60%, black); transform-origin:top center; transition:transform .12s var(--ease), background .18s var(--ease); z-index:2; }
@media (hover:hover){
  .pk-white:hover{ background:color-mix(in oklch, var(--accent-soft) 32%, var(--bg)); }
  .pk-black:hover{ background:color-mix(in oklch, var(--accent-soft) 22%, var(--ink-panel)); }
}
.pk-white.is-down{ transform:scaleY(.95); background:color-mix(in oklch, var(--accent-soft) 45%, var(--bg)); }
.pk-black.is-down{ transform:translateX(-50%) scaleY(.9); background:color-mix(in oklch, var(--accent-soft) 30%, var(--ink-panel)); }
@media (max-width:640px){ .piano-keys{ height:46px; } .pk-black{ width:8%; } }

/* ---------- Page transitions ---------- */
@view-transition{ navigation:auto; }
@keyframes od-vt-in{ from{ opacity:0; transform:translateY(8px); } to{ opacity:1; transform:none; } }
@keyframes od-vt-out{ from{ opacity:1; transform:none; } to{ opacity:0; transform:translateY(-6px); } }
::view-transition-old(root){ animation:od-vt-out .3s var(--ease) both; }
::view-transition-new(root){ animation:od-vt-in .34s var(--ease) both; }
@media (prefers-reduced-motion:reduce){
  ::view-transition-old(root),::view-transition-new(root){ animation:none; }
}

/* ---------- Responsive ---------- */
@media (max-width:920px){
  .hero-inner{ grid-template-columns:1fr; }
  .hero-media{ max-width:420px; }
  .cred-strip{ grid-template-columns:repeat(2,1fr); gap:2rem 1.25rem; }
  .grid-3{ grid-template-columns:1fr; }
  .principle, .principle + .principle{ padding-left:0; border-left:0; }
  .course-grid{ grid-template-columns:1fr; }
  .stats-band .stats{ grid-template-columns:1fr; }
  .stat, .stat + .stat{ padding-left:0; border-left:0; border-top:1px solid color-mix(in oklch, var(--bg) 16%, var(--ink-panel)); padding-block:2.25rem; }
  .stat:first-child{ border-top:0; }
  .course-detail{ grid-template-columns:1fr; }
  .course-detail.flip .course-media{ order:0; }
  .course-detail .course-media{ max-width:520px; }
  .cta-banner{ grid-template-columns:1fr; }
  .contact-grid{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr 1fr; }
}
@media (max-width:640px){
  .nav-links{
    position:fixed; inset:84px 0 auto 0; flex-direction:column; align-items:stretch; gap:0;
    background:var(--bg); border-bottom:1px solid var(--border);
    padding:1.25rem var(--gutter) 1.75rem;
    transform:translateY(-120%); transition:transform .35s var(--ease);
    box-shadow:0 22px 40px -26px color-mix(in oklch, var(--fg) 65%, transparent);
  }
  .nav-links.open{ transform:translateY(0); }
  .nav-link{ padding:1.15rem 0; border-bottom:1px solid var(--border); font-size:1rem; }
  .nav-link::after{ display:none; }
  .nav-cta{ margin-top:1.4rem; width:100%; }
  .nav-toggle{ display:flex; }
  .grid-2{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr; gap:2.5rem; }
  .cta-banner{ padding:2.25rem 1.75rem; }
}
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration:.001ms !important; transition-duration:.001ms !important; }
  .reveal{ opacity:1; transform:none; }
}