/* ============================================================
   ARIA — Vocal Studio · Landing page
   Theme theo brand.md mục 8.2 (Mực Đêm & Bạch Kim)
   ============================================================ */

:root {
  /* Core */
  --ink:            #14213D; /* Mực Đêm */
  --platinum:       #C7CCD2; /* Bạch Kim - the glow */
  --pearl:          #F1F0EC; /* Ngọc Trai */
  --amethyst:       #7E6A93; /* Thạch Anh - điểm nhấn */

  /* Extended */
  --ink-deep:       #0E1729;
  --ink-hero:       #071632; /* nền đúng màu file logo — hero liền mạch */
  --steel:          #33405A;
  --platinum-light: #E5E8EC;
  --pewter:         #9AA1AA; /* khói bạc - chữ phụ trên nền tối */
  --amethyst-light: #C7B7D6; /* accent trên nền tối */
  --amethyst-deep:  #4B3D5E; /* CTA / link trên nền sáng */
  --graphite:       #2B2E33; /* body text */
  --slate:          #5C636C; /* chữ phụ trên nền sáng */
  --offwhite:       #FBFBF9;
  --mist:           #E4E1DA;

  /* Type */
  --font-wordmark: "Allura", cursive;
  --font-display:  "Fraunces", Georgia, serif;
  --font-body:     "Inter", system-ui, sans-serif;

  --radius: 14px;
  --container: 1080px;
  --pad-section: clamp(64px, 10vw, 112px);
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}
body {
  margin: 0;
  background: var(--pearl);
  color: var(--graphite);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
h1, h2, h3 { font-family: var(--font-display); color: var(--ink); font-weight: 500; line-height: 1.25; margin: 0 0 .5em; }
p { margin: 0 0 1em; }
a { color: var(--amethyst-deep); }
:focus-visible { outline: 3px solid var(--amethyst); outline-offset: 2px; }

.container { max-width: var(--container); margin-inline: auto; padding-inline: 20px; }
.section { padding-block: var(--pad-section); }

/* Nền tối */
.section--dark, .section--hero, .section--deep { color: var(--pearl); }
.section--dark  { background: var(--ink); }
.section--hero  { background: var(--ink-hero); }
.section--deep  { background: var(--ink-deep); }
.section--dark h2, .section--hero h1, .section--hero h2, .section--deep h2,
.section--dark h3, .section--deep h3 { color: var(--platinum-light); }
.section--dark .muted, .section--hero .muted, .section--deep .muted { color: var(--pewter); }
.muted { color: var(--slate); }

/* Nhãn nhỏ IN HOA */
.eyebrow {
  font-family: var(--font-body);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--slate);
  margin-bottom: 14px;
}
.section--dark .eyebrow, .section--hero .eyebrow, .section--deep .eyebrow { color: var(--pewter); }

.h2 { font-size: clamp(26px, 4.6vw, 38px); }
.lead { font-size: clamp(17px, 2.4vw, 19px); }

/* ---------- Nút ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-body); font-size: 15px; font-weight: 600;
  padding: 14px 26px; border-radius: var(--radius);
  border: 1px solid transparent; cursor: pointer; text-decoration: none;
  transition: transform .15s ease, background .2s ease, opacity .2s ease;
  min-height: 48px;
}
.btn:active { transform: translateY(1px); }
/* Trên nền sáng: nút Mực Đêm */
.btn--ink { background: var(--ink); color: var(--pearl); }
.btn--ink:hover { background: var(--ink-deep); }
/* Trên nền tối: nút "glow" bạch kim */
.btn--glow { background: var(--platinum-light); color: var(--ink); }
.btn--glow:hover { background: var(--platinum-light); }
/* Outline trên nền tối */
.btn--ghost { background: transparent; color: var(--platinum-light); border-color: var(--steel); }
.btn--ghost:hover { border-color: var(--pewter); }
/* Outline trên nền sáng */
.btn--line { background: transparent; color: var(--amethyst-deep); border-color: var(--amethyst-deep); }
.btn--line:hover { background: rgba(75, 61, 94, .07); }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 60;
  transition: background .25s ease, box-shadow .25s ease;
}
.site-header.scrolled {
  background: rgba(7, 22, 50, .92);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(199, 204, 210, .12);
}
.site-header .container { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand-lockup { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-lockup .brand-mark { width: 46px; height: 46px; }
.brand-lockup .descriptor {
  font-size: 11px; font-weight: 600; letter-spacing: .18em; text-transform: uppercase;
  color: var(--pewter); border-left: 1px solid var(--steel); padding-left: 12px;
}
.site-nav { margin-left: auto; display: none; gap: 26px; }
.site-nav a { color: var(--platinum-light); text-decoration: none; font-size: 14.5px; font-weight: 500; }
.site-nav a:hover { color: var(--platinum-light); }
.header-cta { display: none; margin-left: 8px; padding: 10px 18px; min-height: 40px; font-size: 14px; }
@media (min-width: 900px) {
  .site-nav { display: flex; }
  .header-cta { display: inline-flex; }
}

/* ---------- Hero ---------- */
.hero { padding-top: clamp(96px, 16vw, 150px); padding-bottom: clamp(56px, 9vw, 96px); text-align: center; }
.hero-logo { width: min(420px, 76vw); height: auto; margin-inline: auto; }
.hero h1 {
  font-size: clamp(30px, 5.6vw, 52px);
  max-width: 21ch; margin-inline: auto; margin-top: 10px;
}
.hero h1 em { font-style: italic; color: var(--platinum); }
.hero .lead { max-width: 56ch; margin-inline: auto; color: var(--platinum-light); }
.hero-cta { margin-top: 30px; display: flex; flex-direction: column; align-items: center; gap: 14px; }
.hero-cta .note { font-size: 13.5px; color: var(--pewter); margin: 0; }
.hero-route {
  margin-top: 26px; font-size: 15px; color: var(--amethyst-light);
  text-decoration: none; border-bottom: 1px solid rgba(199, 183, 214, .4); padding-bottom: 2px;
}
.hero-route:hover { color: var(--platinum-light); border-color: var(--platinum); }

/* Trust strip */
.trust { padding-bottom: clamp(48px, 7vw, 72px); text-align: center; }
.trust .eyebrow { margin-bottom: 18px; }
.trust-names {
  display: flex; flex-wrap: wrap; justify-content: center; column-gap: 10px; row-gap: 6px;
  max-width: 760px; margin-inline: auto; padding: 0; list-style: none;
  font-family: var(--font-display); font-size: clamp(15px, 2.4vw, 18px); color: var(--platinum);
}
.trust-names li + li::before { content: "·"; margin-right: 10px; color: var(--steel); }

/* ---------- Đường flow ---------- */
.flow-divider { display: block; width: min(420px, 70%); margin: 0 auto; opacity: .55; }
.section--dark .flow-divider, .section--deep .flow-divider { opacity: .4; }

/* ---------- 3 trụ ---------- */
.pillars { display: grid; gap: 18px; margin-top: 38px; }
@media (min-width: 768px) { .pillars { grid-template-columns: repeat(3, 1fr); } }
.pillar {
  background: var(--offwhite); border: 1px solid var(--mist); border-radius: var(--radius);
  padding: 28px 24px;
}
.pillar h3 { font-size: 20px; margin-bottom: 10px; }
.pillar p { margin: 0; font-size: 15.5px; color: var(--slate); }
.chain {
  margin-top: 40px; text-align: center;
}
.chain .chain-line {
  font-family: var(--font-display); font-size: clamp(20px, 3.6vw, 28px); color: var(--ink);
}
.chain .chain-sub { color: var(--slate); font-size: 15.5px; max-width: 52ch; margin: 8px auto 0; }

/* ---------- Tuấn Linh ---------- */
.instructor { display: grid; gap: 32px; align-items: center; }
@media (min-width: 820px) { .instructor { grid-template-columns: 5fr 7fr; gap: 56px; } }
.img-slot {
  position: relative; border-radius: var(--radius); overflow: hidden; margin: 0;
  aspect-ratio: 4 / 5; background: linear-gradient(160deg, var(--steel), var(--ink) 70%);
}
.img-slot img { width: 100%; height: 100%; object-fit: cover; object-position: center 32%; }
.img-slot .img-caption {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 2;
  padding: 42px 18px 15px;
  background: linear-gradient(to top, rgba(7, 22, 50, .92), rgba(7, 22, 50, .55) 55%, transparent);
  color: var(--platinum-light); font-size: 13px; line-height: 1.45;
}
.img-slot .img-caption strong { color: #fff; font-weight: 600; }
.img-slot.pending .img-caption { display: none; }
.img-slot .img-placeholder {
  position: absolute; inset: 0; display: none; flex-direction: column; gap: 8px;
  align-items: center; justify-content: center; text-align: center; padding: 24px;
  color: var(--pewter); font-size: 12.5px; letter-spacing: .12em; text-transform: uppercase;
}
.img-slot.pending .img-placeholder { display: flex; }
.img-slot.pending img { visibility: hidden; }
.img-placeholder .ph-mark { font-family: var(--font-wordmark); font-size: 44px; color: var(--platinum); text-transform: none; letter-spacing: 0; }
.instructor blockquote {
  margin: 22px 0 0; padding-left: 18px; border-left: 2px solid var(--amethyst);
  font-family: var(--font-display); font-style: italic; font-size: 19px; color: var(--ink);
}
.instructor .credit { font-size: 14px; color: var(--slate); margin-top: 10px; }

/* ---------- Gallery nghệ sĩ ---------- */
.artist-grid { display: grid; gap: 14px; margin-top: 36px; grid-template-columns: repeat(2, 1fr); }
@media (min-width: 820px) { .artist-grid { grid-template-columns: repeat(4, 1fr); } }
.artist-card {
  position: relative; margin: 0; overflow: hidden; border-radius: var(--radius);
  aspect-ratio: 3 / 2; background: linear-gradient(160deg, var(--steel), var(--ink) 70%);
  border: 1px solid var(--mist);
}
.artist-card img { width: 100%; height: 100%; object-fit: cover; display: block; }
.artist-card figcaption {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 2;
  padding: 30px 14px 11px;
  background: linear-gradient(to top, rgba(7, 22, 50, .92), transparent);
  color: var(--platinum-light); font-size: 13px; letter-spacing: .01em;
}
.artist-card figcaption strong { color: #fff; font-weight: 600; }

/* ---------- Bản thu ---------- */
.audio-grid { display: grid; gap: 16px; margin-top: 36px; }
@media (min-width: 820px) { .audio-grid { grid-template-columns: repeat(3, 1fr); } }
.audio-card {
  background: linear-gradient(170deg, #263350, #16223F);
  border: 1px solid rgba(199, 204, 210, .16);
  border-radius: var(--radius); padding: 22px;
}
.audio-card h3 { font-size: 17px; color: var(--platinum-light); margin-bottom: 4px; }
.audio-card .story { font-size: 14px; color: var(--pewter); margin-bottom: 14px; min-height: 42px; }
.audio-card audio { width: 100%; }
.audio-card .pending-note {
  display: none; font-size: 14px; color: var(--amethyst-light);
  border: 1px dashed rgba(199, 183, 214, .4); border-radius: 10px; padding: 12px 14px; text-align: center;
}
.audio-card.pending audio { display: none; }
.audio-card.pending .pending-note { display: block; }

/* ---------- Aria Pro / Thu bản hit ---------- */
.pro-grid { display: grid; gap: 36px; align-items: start; margin-top: 8px; }
@media (min-width: 860px) { .pro-grid { grid-template-columns: 7fr 5fr; gap: 60px; } }
.pro-steps { list-style: none; margin: 26px 0 0; padding: 0; display: grid; gap: 14px; }
.pro-steps li { display: flex; gap: 14px; align-items: baseline; font-size: 16px; color: var(--platinum-light); }
.pro-steps .tick { color: var(--platinum); font-family: var(--font-display); font-style: italic; }
.pro-price {
  background: rgba(199, 204, 210, .07); border: 1px solid rgba(199, 204, 210, .2);
  border-radius: var(--radius); padding: 28px 26px;
}
.pro-price .amount { font-family: var(--font-display); font-size: 34px; color: var(--platinum-light); }
.pro-price .unit { font-size: 14px; color: var(--pewter); }
/* Ưu đãi phòng thu mở khoá theo gói học */
.rec-offers { margin-top: 18px; border-top: 1px solid rgba(199, 204, 210, .16); padding-top: 14px; font-size: 14px; }
.rec-offers > strong { display: block; color: var(--platinum-light); font-weight: 600; margin-bottom: 8px; }
.rec-offers .ro { display: flex; justify-content: space-between; gap: 12px; color: var(--pewter); padding: 3px 0; }
.rec-offers .ro .p { color: var(--platinum-light); font-weight: 600; white-space: nowrap; }
.rec-offers .ro-note { margin-top: 10px; font-size: 13px; color: var(--pewter); }
.pro-usecases { display: grid; gap: 12px; margin-top: 18px; }
.pro-usecases .uc { border-top: 1px solid rgba(199, 204, 210, .16); padding-top: 12px; font-size: 14.5px; color: var(--pewter); }
.pro-usecases .uc strong { color: var(--platinum-light); font-weight: 600; display: block; margin-bottom: 2px; }
.pro-price .btn { width: 100%; margin-top: 20px; }

/* ---------- Học phí ---------- */
.pricing-grid { display: grid; gap: 18px; margin-top: 38px; }
@media (min-width: 860px) { .pricing-grid { grid-template-columns: repeat(3, 1fr); align-items: stretch; } }
.price-card {
  background: var(--offwhite); border: 1px solid var(--mist); border-radius: var(--radius);
  padding: 30px 26px; display: flex; flex-direction: column; position: relative;
}
.price-card.featured { border-color: var(--amethyst); box-shadow: 0 10px 30px rgba(20, 33, 61, .08); }
.price-card .badge {
  position: absolute; top: -12px; left: 24px;
  background: var(--amethyst-deep); color: var(--pearl);
  font-size: 11.5px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase;
  padding: 4px 12px; border-radius: 999px;
}
.price-card .badge--save { background: var(--ink); }
.price-card h3 { font-size: 21px; margin-bottom: 2px; }
.price-card .tagline { font-size: 14px; color: var(--slate); margin-bottom: 18px; }
/* Giá 1:1 và cặp 1:2 ngang hàng — hai ô đều nhau, không dòng phụ chú */
.price-duo { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 16px; }
.price-opt {
  border: 1px solid var(--mist); border-radius: 10px; padding: 10px 12px;
  display: flex; flex-direction: column; gap: 2px; background: #fff;
}
.price-opt .mode { font-size: 12px; color: var(--slate); letter-spacing: .02em; }
.price-opt .val { font-family: var(--font-display); font-size: 21px; color: var(--ink); white-space: nowrap; }
.price-card ul { list-style: none; margin: 0 0 18px; padding: 0; display: grid; gap: 9px; font-size: 14.5px; color: var(--graphite); }
.price-card ul strong { color: var(--amethyst-deep); font-weight: 600; }
.price-card .spacer { flex: 1; }
.pricing-note {
  margin-top: 34px; text-align: center;
  background: var(--offwhite); border: 1px solid var(--mist); border-radius: var(--radius);
  padding: 26px 22px;
}
.pricing-note p { max-width: 62ch; margin-inline: auto; }
/* Điều khoản gói học — chữ nhỏ dưới bảng giá */
.terms { max-width: 860px; margin: 28px auto 0; }
.terms h4 { font-size: 12.5px; letter-spacing: .08em; text-transform: uppercase; color: var(--slate); margin-bottom: 8px; }
.terms ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: 12.5px; color: var(--slate); line-height: 1.6; }
.terms strong { color: var(--graphite); font-weight: 600; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 780px; margin: 34px auto 0; display: grid; gap: 10px; }
.faq-list details {
  background: var(--offwhite); border: 1px solid var(--mist); border-radius: var(--radius);
  padding: 4px 22px;
}
.faq-list summary {
  cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 16px; align-items: center;
  font-family: var(--font-display); font-size: 17.5px; color: var(--ink); padding: 16px 0;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; font-family: var(--font-body); color: var(--amethyst-deep); font-size: 22px; transition: transform .2s ease; }
.faq-list details[open] summary::after { transform: rotate(45deg); }
.faq-list .answer { padding: 0 0 18px; font-size: 15.5px; color: var(--slate); }
.faq-list .answer p { margin-bottom: .6em; }

/* ---------- Form đăng ký ---------- */
.signup-card {
  background: var(--offwhite); border: 1px solid var(--mist); border-radius: var(--radius);
  box-shadow: 0 18px 50px rgba(20, 33, 61, .1);
  max-width: 720px; margin: 38px auto 0; padding: clamp(26px, 5vw, 44px);
  color: var(--graphite); /* nền thẻ sáng → chữ tối, không thừa hưởng màu trắng của section tối */
}
.field { margin-bottom: 18px; }
fieldset.field { border: 0; padding: 0; margin-inline: 0; min-width: 0; }
.field > label, .field > legend { display: block; font-size: 14px; font-weight: 600; color: var(--ink); margin-bottom: 7px; padding: 0; }
.field input[type="text"], .field input[type="tel"], .field input[type="email"], .field select {
  width: 100%; font: inherit; font-size: 16px; color: var(--graphite);
  background: #fff; border: 1px solid var(--mist); border-radius: 10px;
  padding: 13px 14px; min-height: 48px;
}
.field input:focus, .field select:focus { outline: none; border-color: var(--amethyst); box-shadow: 0 0 0 3px rgba(126, 106, 147, .18); }
.radio-row { display: grid; gap: 9px; }
@media (min-width: 620px) { .radio-row { grid-template-columns: 1fr 1fr; } }
.radio-row label {
  display: flex; align-items: center; gap: 10px; font-size: 15px; color: var(--graphite);
  background: #fff; border: 1px solid var(--mist); border-radius: 10px; padding: 12px 14px; cursor: pointer;
}
.radio-row label:has(input:checked) { border-color: var(--amethyst-deep); box-shadow: 0 0 0 1px var(--amethyst-deep); }
.radio-row input { accent-color: var(--amethyst-deep); }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-actions { margin-top: 24px; }
.form-actions .btn { width: 100%; font-size: 16px; }
.form-privacy { font-size: 13px; color: var(--slate); text-align: center; margin: 12px 0 0; }
.form-status { display: none; margin-top: 16px; border-radius: 10px; padding: 14px 16px; font-size: 15px; }
.form-status.error { display: block; background: #EFEBF2; border: 1px solid var(--amethyst); color: var(--amethyst-deep); }
.field .opt { font-weight: 400; color: var(--slate); }
.form-success { display: none; text-align: center; padding: 20px 6px; }
.form-success h3 { font-size: 24px; color: var(--ink); }
.signup-card.done form { display: none; }
.signup-card.done .form-success { display: block; }

/* Bước QR chuyển khoản */
.qr-box {
  display: flex; gap: 22px; align-items: center; flex-wrap: wrap; justify-content: center;
  margin: 22px auto 14px; padding: 20px; max-width: 480px;
  background: var(--pearl); border: 1px solid var(--mist); border-radius: var(--radius);
}
.qr-frame { background: #fff; padding: 10px; border-radius: 12px; border: 1px solid var(--mist); flex: 0 0 auto; }
.qr-frame img { display: block; width: 200px; height: 200px; }
.qr-info { text-align: left; min-width: 190px; }
.qr-amount { font-family: var(--font-display); font-size: 36px; color: var(--ink); line-height: 1; }
.qr-amount span { font-size: 18px; }
.qr-meta { margin: 14px 0 0; display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; font-size: 13.5px; }
.qr-meta dt { color: var(--slate); }
.qr-meta dd { margin: 0; color: var(--graphite); font-weight: 500; }
.qr-meta dd strong { color: var(--amethyst-deep); }
.qr-confirm { font-size: 13.5px; color: var(--slate); max-width: 480px; margin: 4px auto 0; }


/* ---------- Địa điểm ---------- */
.location-grid { display: grid; gap: 30px; align-items: center; margin-top: 12px; }
@media (min-width: 860px) { .location-grid { grid-template-columns: 5fr 7fr; gap: 54px; } }
.map-facade {
  position: relative; border-radius: var(--radius); overflow: hidden;
  aspect-ratio: 16 / 10; background: linear-gradient(150deg, var(--pearl), var(--mist));
  border: 1px solid var(--mist);
  display: flex; align-items: center; justify-content: center;
}
.map-facade iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.map-facade .map-load { z-index: 2; }
.map-facade.loaded .map-load { display: none; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink-deep); color: var(--pewter); padding-block: 56px 90px; }
.site-footer .footer-mark { width: 96px; height: auto; }
.site-footer .tagline { font-family: var(--font-display); font-style: italic; color: var(--platinum-light); font-size: 16px; margin-top: 6px; }
.footer-cols { display: grid; gap: 28px; margin-top: 30px; }
@media (min-width: 720px) { .footer-cols { grid-template-columns: repeat(3, 1fr); } }
.footer-cols h4 { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--pewter); margin: 0 0 10px; font-weight: 600; }
.footer-cols ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 7px; font-size: 14.5px; }
.footer-cols a { color: var(--platinum-light); text-decoration: none; }
.footer-cols a:hover { color: var(--platinum-light); }
.copyright { margin-top: 40px; font-size: 13px; }
.site-footer .copyright { color: var(--pewter); }

/* ---------- Sticky CTA (mobile) ---------- */
.sticky-cta {
  position: fixed; z-index: 70; inset: auto 0 0 0;
  display: flex; gap: 10px; padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  background: rgba(7, 22, 50, .94);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  border-top: 1px solid rgba(199, 204, 210, .15);
  transform: translateY(0); transition: transform .25s ease;
}
.sticky-cta.hidden { transform: translateY(110%); }
.sticky-cta .btn { flex: 1; padding: 12px 10px; font-size: 14.5px; }
.sticky-cta .btn--icon { flex: 0 0 auto; min-width: 52px; padding: 12px; }
@media (min-width: 900px) { .sticky-cta { display: none; } }

/* ---------- Nút liên hệ nổi (Zalo + Gọi) — cố định bên phải ---------- */
.float-contact {
  position: fixed; right: 18px; bottom: 26px; z-index: 80;
  display: flex; flex-direction: column; gap: 12px;
}
.float-btn {
  width: 52px; height: 52px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; text-decoration: none;
  box-shadow: 0 6px 18px rgba(4, 12, 30, .35);
  transition: transform .2s ease, box-shadow .2s ease;
}
.float-btn:hover { transform: translateY(-2px) scale(1.06); box-shadow: 0 10px 26px rgba(4, 12, 30, .5); }
.float-btn--zalo { background: #0068ff; font-weight: 700; font-size: 14.5px; letter-spacing: .2px; }
.float-btn--zalo:hover { color: #fff; }
.float-btn--tel { background: var(--pearl); color: var(--ink); position: relative; }
.float-btn--tel:hover { color: var(--ink); }
.float-btn--tel::before {
  content: ""; position: absolute; inset: -4px; border-radius: 50%;
  border: 2px solid rgba(241, 240, 236, .65);
  animation: float-pulse 2s ease-out infinite; pointer-events: none;
}
@keyframes float-pulse {
  0% { transform: scale(.85); opacity: .9; }
  70% { transform: scale(1.35); opacity: 0; }
  100% { transform: scale(1.35); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) { .float-btn--tel::before { animation: none; } }
@media (max-width: 899px) {
  /* nằm ngay trên thanh CTA đáy; thanh đáy ẩn 2 nút chữ Zalo/Gọi cho khỏi trùng */
  .float-contact { right: 12px; bottom: calc(80px + env(safe-area-inset-bottom)); }
  .float-btn { width: 48px; height: 48px; }
  .sticky-cta .btn--icon { display: none; }
}

/* ---------- Ảnh phóng to & modal chuyển khoản gói ---------- */
[data-zoom] { cursor: zoom-in; transition: transform .3s ease; }
.artist-card:hover [data-zoom], .img-slot:hover [data-zoom] { transform: scale(1.03); }
body.no-scroll { overflow: hidden; }

.overlay { position: fixed; inset: 0; z-index: 200; display: none; align-items: center; justify-content: center; padding: 24px; }
.overlay:not([hidden]) { display: flex; }
.overlay-backdrop { position: absolute; inset: 0; background: rgba(7, 22, 50, .88); -webkit-backdrop-filter: blur(5px); backdrop-filter: blur(5px); }
.overlay-close {
  position: absolute; top: 12px; right: 16px; z-index: 3;
  width: 46px; height: 46px; padding: 0; line-height: 1;
  background: transparent; border: 0; color: var(--platinum-light);
  font-size: 34px; cursor: pointer;
}
.overlay-close:hover { color: #fff; }
.overlay-panel { position: relative; z-index: 2; max-width: 94vw; max-height: 90vh; }
.overlay-panel--img { display: flex; }
.overlay-img {
  max-width: 94vw; max-height: 90vh; width: auto; height: auto;
  border-radius: 12px; box-shadow: 0 24px 70px rgba(0, 0, 0, .55);
}

/* Panel QR gói học */
.overlay-panel--pay {
  width: min(560px, 94vw); max-height: 90vh; overflow-y: auto;
  background: var(--offwhite); border: 1px solid var(--mist); border-radius: var(--radius);
  padding: clamp(24px, 4vw, 36px); text-align: center;
}
.overlay-panel--pay .pay-eyebrow {
  font-family: var(--font-body); font-size: 12.5px; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase; color: var(--amethyst-deep); margin: 0 0 6px;
}
.overlay-panel--pay .pay-sub { font-size: 14.5px; color: var(--slate); max-width: 42ch; margin: 0 auto 18px; }
.overlay-panel--pay .qr-box { margin-inline: auto; }
.overlay-panel--pay .qr-confirm { margin-top: 14px; }
.pay-options { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 18px; }
.pay-chip {
  font: inherit; font-size: 13.5px; font-weight: 600; cursor: pointer;
  padding: 9px 14px; border-radius: 999px; border: 1px solid var(--mist);
  background: #fff; color: var(--slate);
  transition: border-color .15s ease, color .15s ease, background .15s ease;
}
.pay-chip:hover { border-color: var(--amethyst); }
.pay-chip.is-active { border-color: var(--amethyst-deep); color: var(--amethyst-deep); background: rgba(75, 61, 94, .06); }

/* Link mở modal chuyển khoản trong thẻ giá */
.pay-link {
  align-self: center; margin-top: 10px; padding: 4px 0;
  background: transparent; border: 0; cursor: pointer;
  font: inherit; font-size: 13.5px; font-weight: 600; color: var(--amethyst-deep);
  border-bottom: 1px solid transparent;
}
.pay-link:hover { border-bottom-color: currentColor; }
.pay-link--light { color: var(--amethyst-light); display: block; width: 100%; text-align: center; margin-top: 12px; }

/* Ẩn phần tử khi thiếu thông tin liên hệ (JS gỡ class khi có config) */
.needs-config { display: none !important; }