/* =========================================================
   Sophia Yoga Kids – giao diện chính
   Muốn đổi màu cả trang: sửa các biến trong :root bên dưới.
   ========================================================= */
:root {
  --pink: #ff4f9a;
  --blue: #1e88e5;
  --teal: #4ecdc4;
  --yellow: #ffd93d;
  --green: #7ac74f;
  --orange: #ff8c42;
  --purple: #9b6dff;
  --ink: #2d2a4a;
  --muted: #6b6889;
  --cream: #fff9f0;
  --dark: #2b2d42;
  --radius: 24px;
  --shadow: 0 10px 30px rgba(45, 42, 74, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
  margin: 0;
  font-family: "Nunito", system-ui, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.6;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3, h4 { font-family: "Baloo 2", "Nunito", sans-serif; line-height: 1.15; margin: 0 0 .5em; }
.container { width: min(1160px, 100% - 32px); margin-inline: auto; }

/* ---------- Nút bấm ---------- */
.btn {
  display: inline-block;
  font-family: "Baloo 2", sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  padding: .75em 1.8em;
  border-radius: 999px;
  text-decoration: none;
  border: 3px solid transparent;
  cursor: pointer;
  transition: transform .15s, box-shadow .15s;
  box-shadow: 0 5px 0 rgba(0,0,0,.15);
}
.btn:hover { transform: translateY(-3px); box-shadow: 0 8px 0 rgba(0,0,0,.15); }
.btn:active { transform: translateY(2px); box-shadow: 0 2px 0 rgba(0,0,0,.15); }
.btn-blue { background: var(--blue); color: #fff; }
.btn-pink { background: var(--pink); color: #fff; }
.btn-light { background: #8fdcf0; color: #fff; }
.btn-yellow { background: var(--yellow); color: var(--ink); }
.btn-outline { background: #fff; border-color: var(--blue); color: var(--blue); }
.btn-small { font-size: 1rem; padding: .45em 1.2em; }
.btn-full { width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #eee;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-text { font-family: "Baloo 2", sans-serif; font-size: 1.45rem; font-weight: 700; color: var(--purple); }
.logo-text b { color: var(--pink); }
.main-nav { display: flex; align-items: center; gap: 26px; }
.main-nav a { font-family: "Baloo 2", sans-serif; font-weight: 700; font-size: 1.05rem; text-decoration: none; }
.main-nav a:not(.btn):hover { color: var(--pink); }
.menu-toggle { display: none; background: none; border: 0; font-size: 1.8rem; cursor: pointer; color: var(--ink); }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 70px 0 60px; background: var(--cream); overflow: hidden; }
.blob { position: absolute; border-radius: 50%; z-index: 0; }
.blob-yellow { width: 320px; height: 320px; background: var(--yellow); top: -140px; left: -120px; }
.blob-teal { width: 200px; height: 240px; background: var(--teal); top: 260px; right: -60px; border-radius: 60% 40% 50% 50%; }
.blob-pink { width: 260px; height: 260px; background: var(--pink); bottom: -150px; left: -90px; opacity: .85; }
.hero-inner { position: relative; z-index: 1; text-align: center; }
.hero-kicker {
  display: inline-block;
  font-family: "Baloo 2", sans-serif; font-weight: 700;
  color: var(--purple); background: #f0e8ff;
  padding: .3em 1em; border-radius: 999px; margin: 0 0 1rem;
}
.hero h1 { font-size: clamp(2.2rem, 5.5vw, 4.2rem); font-weight: 800; }
.rainbow {
  background: linear-gradient(90deg, var(--pink), var(--orange), #f5b700, var(--green), var(--teal), var(--blue), var(--purple));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { max-width: 640px; margin: 0 auto 2rem; font-size: 1.15rem; color: var(--muted); }
.hero-buttons { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }

.cards-row {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
  margin-top: 56px;
}
.video-card {
  position: relative; aspect-ratio: 4/3; border-radius: var(--radius);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-decoration: none; color: #fff; overflow: hidden;
  box-shadow: var(--shadow); border: 5px solid #fff;
  transition: transform .2s;
}
.video-card:hover { transform: translateY(-6px) rotate(-1deg); }
.card-emoji { font-size: 4rem; }
.play {
  position: absolute; top: 14px; right: 14px;
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(255,255,255,.3); border: 3px solid #fff;
  display: grid; place-items: center; font-size: 1rem;
}
.card-label {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 10px 14px; background: rgba(0,0,0,.18);
  font-family: "Baloo 2", sans-serif; font-weight: 800; font-size: 1.15rem; text-transform: uppercase;
}
.c-purple { background: linear-gradient(135deg, #b794ff, #7b5cff); }
.c-green  { background: linear-gradient(135deg, #a3e06b, #4caf50); }
.c-orange { background: linear-gradient(135deg, #ffb36b, #ff7043); }
.c-blue   { background: linear-gradient(135deg, #6fd3f7, #1e88e5); }
.c-pink   { background: linear-gradient(135deg, #ff9ac6, #ff4f9a); }
.c-yellow { background: linear-gradient(135deg, #ffe680, #ffc107); }

/* ---------- Tiêu đề section ---------- */
section { padding: 90px 0; }
.section-title { text-align: center; font-size: clamp(1.9rem, 4vw, 2.8rem); font-weight: 800; }
.section-title.light { color: #fff; }
.section-sub { text-align: center; color: var(--muted); font-size: 1.1rem; max-width: 620px; margin: 0 auto 2.5rem; }
.hl-pink { color: var(--pink); }
.hl-blue { color: var(--blue); }
.hl-green { color: var(--green); }
.hl-yellow { color: var(--yellow); }
.bg-yellow { background: var(--yellow); }
.bg-teal { background: var(--teal); }
.bg-pink { background: #ffb3d4; }
.bg-purple { background: #d7c4ff; }

/* ---------- Lợi ích ---------- */
.benefit-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; margin-top: 40px; }
.benefit { text-align: center; }
.benefit-icon {
  width: 110px; height: 110px; margin: 0 auto 16px;
  border-radius: 40% 60% 55% 45% / 50% 45% 55% 50%;
  display: grid; place-items: center; font-size: 3rem;
}
.benefit h3 { font-size: 1.5rem; }
.benefit p { color: var(--muted); margin: 0; }

/* ---------- Lớp học / bảng giá ---------- */
.classes { background: #eef8ff; }
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; align-items: center; }
.price-card {
  position: relative; background: #fff; border-radius: var(--radius);
  padding: 34px 28px; text-align: center; box-shadow: var(--shadow);
}
.price-card.featured { border: 4px solid var(--pink); transform: scale(1.04); }
.badge {
  position: absolute; top: -16px; left: 50%; transform: translateX(-50%);
  background: var(--pink); color: #fff; font-weight: 700; font-size: .9rem;
  padding: .3em 1em; border-radius: 999px; white-space: nowrap;
}
.price-head { width: 80px; height: 80px; border-radius: 50%; margin: 0 auto 14px; display: grid; place-items: center; font-size: 2.4rem; }
.price-card h3 { font-size: 1.8rem; margin-bottom: 0; }
.age { color: var(--muted); margin: 0 0 10px; font-weight: 700; }
.price { font-family: "Baloo 2", sans-serif; font-size: 2rem; font-weight: 800; color: var(--blue); margin: 0 0 14px; }
.price small { font-size: 1rem; color: var(--muted); font-weight: 600; }
.price-card ul { list-style: none; padding: 0; margin: 0 0 24px; text-align: left; }
.price-card li { padding: 8px 0 8px 30px; position: relative; border-bottom: 1px dashed #e4e4ee; }
.price-card li::before { content: "✓"; position: absolute; left: 4px; color: var(--green); font-weight: 800; }
.note { text-align: center; color: var(--muted); font-size: .9rem; margin-top: 30px; }

/* ---------- Cảm nhận ---------- */
.testimonial { background: linear-gradient(135deg, var(--teal), #6fd3f7); }
.quote-card {
  max-width: 820px; margin: 0 auto; background: #fff; border-radius: var(--radius);
  padding: 44px; text-align: center; box-shadow: var(--shadow);
}
.stars { color: #f5b700; font-size: 1.6rem; letter-spacing: 4px; }
.quote-card blockquote { font-size: 1.3rem; font-style: italic; margin: 16px 0; }
.quote-author { font-family: "Baloo 2", sans-serif; font-weight: 700; color: var(--pink); margin: 0; }

/* ---------- Giới thiệu ---------- */
.about-inner { display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px; align-items: center; }
.about-photo img { border-radius: 45% 55% 50% 50% / 55% 45% 55% 45%; box-shadow: var(--shadow); border: 8px solid var(--yellow); }
.about-text h2 { font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 800; }
.about-text p { color: var(--muted); font-size: 1.08rem; }

/* ---------- Blog ---------- */
.blog { background: var(--cream); }
.filters { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 36px; }
.filter {
  font-family: "Baloo 2", sans-serif; font-weight: 700; font-size: 1rem;
  border: 2px solid #e1dcef; background: #fff; color: var(--ink);
  padding: .4em 1.1em; border-radius: 999px; cursor: pointer;
}
.filter:hover { border-color: var(--green); }
.filter.active { background: var(--green); border-color: var(--green); color: #fff; }
.post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.post { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: transform .2s; }
.post:hover { transform: translateY(-5px); }
.post.hide { display: none; }
.post-img { height: 170px; display: grid; place-items: center; font-size: 4.5rem; }
.post-body { padding: 22px 24px 26px; }
.tag { display: inline-block; font-size: .8rem; font-weight: 700; color: var(--green); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 6px; }
.post h3 { font-size: 1.3rem; }
.post h3 a { text-decoration: none; }
.post h3 a:hover { color: var(--pink); }
.post p { color: var(--muted); margin: 0; }

/* ---------- Tài liệu ---------- */
.downloads { background: var(--purple); background: linear-gradient(135deg, #7b5cff, #9b6dff); }
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 40px; }
.dl-card {
  background: rgba(255,255,255,.12); border: 2px dashed rgba(255,255,255,.5);
  border-radius: var(--radius); padding: 34px 26px; text-align: center; color: #fff;
}
.dl-icon { font-size: 3.4rem; }
.dl-card h3 { font-size: 1.4rem; }
.dl-card p { opacity: .9; }

/* ---------- Liên hệ ---------- */
.contact-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.contact-text h2 { font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 800; }
.contact-text p { color: var(--muted); font-size: 1.1rem; }
.contact-list { list-style: none; padding: 0; font-size: 1.1rem; }
.contact-list li { margin: 10px 0; }
.contact-list a { text-decoration: none; font-weight: 700; color: var(--blue); }
.contact-form { background: #fff; border-radius: var(--radius); padding: 34px; box-shadow: var(--shadow); border-top: 8px solid var(--pink); }
.contact-form label { display: block; font-weight: 700; margin-bottom: 16px; }
.contact-form input, .contact-form select, .contact-form textarea {
  display: block; width: 100%; margin-top: 6px;
  font: inherit; font-weight: 400; padding: 12px 16px;
  border: 2px solid #e1dcef; border-radius: 14px; background: #fcfbff;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { outline: none; border-color: var(--teal); }
.form-msg { text-align: center; font-weight: 700; color: var(--green); margin: 14px 0 0; }

/* ---------- Footer ---------- */
.site-footer { position: relative; background: var(--dark); color: #c9cbe0; padding: 70px 0 24px; margin-top: 40px; }
.wave {
  position: absolute; top: -28px; left: 0; right: 0; height: 30px;
  background: radial-gradient(circle at 20px -10px, transparent 26px, var(--dark) 27px) repeat-x;
  background-size: 40px 30px;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 50px; }
.footer-logo .logo-text { color: #fff; }
.site-footer h4 { color: #fff; font-size: 1.4rem; position: relative; padding-bottom: 8px; }
.site-footer h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 40px; height: 4px; border-radius: 4px; background: var(--yellow); }
.site-footer a:not(.logo) { display: block; text-decoration: none; margin: 8px 0; }
.site-footer a:hover { color: var(--yellow); }
.socials { display: flex; gap: 10px; margin-top: 16px; }
.socials a {
  display: grid !important; place-items: center; margin: 0 !important;
  width: 42px; height: 42px; border-radius: 50%;
  background: rgba(255,255,255,.1); color: #fff; font-weight: 800;
}
.socials a:hover { background: var(--pink); color: #fff !important; }
.copyright { text-align: center; border-top: 1px solid rgba(255,255,255,.1); margin: 0 auto; padding-top: 20px; font-size: .9rem; width: min(1160px, 100% - 32px); }

.to-top {
  position: fixed; right: 20px; bottom: 20px; z-index: 40;
  width: 50px; height: 50px; border-radius: 50%;
  background: var(--pink); color: #fff; text-decoration: none;
  display: grid; place-items: center; font-size: 1.5rem; font-weight: 800;
  box-shadow: var(--shadow); opacity: 0; pointer-events: none; transition: opacity .2s;
}
.to-top.show { opacity: 1; pointer-events: auto; }

/* ---------- Trang bài viết ---------- */
.article { max-width: 760px; margin: 0 auto; padding: 60px 0 80px; }
.article h1 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; }
.article-photo { width: 100%; max-height: 520px; object-fit: cover; border-radius: var(--radius); margin: 24px 0; box-shadow: var(--shadow); }
.article .post-img { border-radius: var(--radius); height: 260px; margin: 24px 0; font-size: 7rem; }
.article h2 { font-size: 1.7rem; margin-top: 1.6em; color: var(--blue); }
.article p, .article li { font-size: 1.1rem; }
.article ol li { margin-bottom: 10px; }
.back-link { font-weight: 700; color: var(--pink); text-decoration: none; }

/* ---------- Điện thoại / máy tính bảng ---------- */
@media (max-width: 960px) {
  .cards-row, .benefit-grid { grid-template-columns: repeat(2, 1fr); }
  .price-grid, .post-grid, .dl-grid { grid-template-columns: 1fr 1fr; }
  .price-card.featured { transform: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .menu-toggle { display: block; }
  .main-nav {
    position: absolute; top: 76px; left: 0; right: 0;
    flex-direction: column; gap: 16px; padding: 24px;
    background: #fff; border-bottom: 1px solid #eee; box-shadow: var(--shadow);
    display: none;
  }
  .main-nav.open { display: flex; }
  section { padding: 64px 0; }
  .price-grid, .post-grid, .dl-grid, .about-inner, .contact-inner { grid-template-columns: 1fr; }
  .about-inner, .contact-inner { gap: 36px; }
  .about-photo { max-width: 320px; margin: 0 auto; }
  .quote-card { padding: 30px 22px; }
}
@media (max-width: 480px) {
  .cards-row { gap: 14px; }
  .card-emoji { font-size: 2.8rem; }
  .card-label { font-size: .9rem; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- Khoảnh khắc lớp học (ảnh) ---------- */
/* Ảnh tự xếp thành 3 cột so le, giữ đúng tỉ lệ ảnh */
.gallery-grid { columns: 3 260px; column-gap: 22px; }
.gallery figure {
  margin: 0 0 22px; position: relative; break-inside: avoid;
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 6px solid #fff;
}
.gallery img { width: 100%; height: auto; transition: transform .4s; }
.gallery figure:hover img { transform: scale(1.04); }
.gallery figcaption {
  position: absolute; left: 14px; bottom: 14px;
  background: rgba(255,255,255,.92); color: var(--ink);
  font-family: "Baloo 2", sans-serif; font-weight: 700;
  padding: .3em 1em; border-radius: 999px;
}
.footer-addr { display: block; margin: 8px 0; }

/* ---------- Ảnh đầu trang chủ ---------- */
.hero-inner { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; text-align: left; }
.hero-inner .hero-sub { margin-left: 0; }
.hero-inner .hero-buttons { justify-content: flex-start; }
.hero-photo { position: relative; max-width: 440px; justify-self: center; width: 100%; }
.hero-photo img {
  width: 100%; aspect-ratio: 4/5; object-fit: cover; object-position: center 30%;
  border-radius: 999px 999px 36px 36px;
  border: 8px solid #fff; box-shadow: var(--shadow);
}
.hero-sticker {
  position: absolute; left: -10px; bottom: 28px;
  background: var(--yellow); color: var(--ink);
  font-family: "Baloo 2", sans-serif; font-weight: 700;
  padding: .45em 1.1em; border-radius: 999px; box-shadow: var(--shadow);
  transform: rotate(-4deg);
}

/* ---------- Ảnh thẻ lớp học ---------- */
.price-photo { margin: -34px -28px 18px; aspect-ratio: 4/3; overflow: hidden; border-radius: var(--radius) var(--radius) 0 0; }
.price-photo img { width: 100%; height: 100%; object-fit: cover; }
.price-card.featured .price-photo { margin-top: -34px; }

/* ---------- Về Sophia ---------- */
.about { padding-top: 0; }
.about-banner {
  height: 320px; margin-bottom: 70px;
  background: linear-gradient(90deg, rgba(45,42,74,.55), rgba(45,42,74,0) 60%), url("../images/sophia-tu-the-vu-cong.jpg") center 35% / cover;
  display: flex; align-items: flex-end;
}
.about-banner p {
  width: min(1160px, 100% - 32px); margin: 0 auto 36px;
  color: #fff; font-family: "Baloo 2", sans-serif; font-weight: 700;
  font-size: clamp(1.3rem, 3vw, 2rem); max-width: 1160px; text-shadow: 0 2px 10px rgba(0,0,0,.35);
}
.about-photo { position: relative; }
.about-photo-small {
  position: absolute; right: -14px; bottom: -24px; width: 46%;
  border-radius: 20px !important; border: 6px solid #fff !important;
  transform: rotate(4deg);
}

/* ---------- Đào tạo giáo viên ---------- */
.training { background: #f3efff; }
.training-inner { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: center; margin-top: 36px; }
.training-main { margin: 0; }
.training-main img { width: 100%; border-radius: var(--radius); border: 6px solid #fff; box-shadow: var(--shadow); }
.training-badge { background: #fff; border-left: 6px solid var(--purple); padding: 14px 18px; border-radius: 14px; font-size: 1.08rem; }
.training-list { list-style: none; padding: 0; margin: 0 0 26px; }
.training-list li { padding: 8px 0 8px 30px; position: relative; color: var(--muted); }
.training-list li::before { content: "✓"; position: absolute; left: 4px; color: var(--purple); font-weight: 800; }
.training-thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 36px; }
.training-thumbs img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 18px; border: 5px solid #fff; box-shadow: var(--shadow); }

/* ---------- Bài viết có ảnh ---------- */
.post-photo { width: 100%; height: 170px; object-fit: cover; object-position: center 25%; }

/* ---------- Ảnh liên hệ ---------- */
.contact-photo { position: relative; margin: 24px 0 0; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 6px solid #fff; }
.contact-photo img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.contact-photo figcaption {
  position: absolute; left: 12px; bottom: 12px; background: rgba(255,255,255,.92);
  font-family: "Baloo 2", sans-serif; font-weight: 700; padding: .25em .9em; border-radius: 999px; font-size: .95rem;
}

@media (max-width: 960px) {
  .training-thumbs { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .hero-inner, .training-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero-inner { text-align: center; }
  .hero-inner .hero-sub { margin-left: auto; }
  .hero-inner .hero-buttons { justify-content: center; }
  .hero-photo { max-width: 360px; margin: 0 auto; }
  .about-banner { height: 220px; margin-bottom: 48px; }
  .about-photo-small { right: -8px; bottom: -18px; }
}

/* ---------- Khóa học & học phí ---------- */
.bg-blue { background: #b9dcff; }
.bg-green { background: #c8ecb0; }
.bg-orange { background: #ffd0a8; }
.courses { background: linear-gradient(160deg, #ffe3ef 0%, #ffd0e4 55%, #ffc2dc 100%); }
.course-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.course-card {
  position: relative; background: #fff; border-radius: var(--radius);
  padding: 28px 22px; text-align: center; box-shadow: var(--shadow);
  display: flex; flex-direction: column; align-items: center;
}
.course-card.featured { box-shadow: 0 0 0 4px var(--pink), var(--shadow); }
.course-wide { grid-column: span 2; }
.course-icon { width: 68px; height: 68px; border-radius: 50%; display: grid; place-items: center; font-size: 2rem; margin-bottom: 12px; }
.course-card h3 { font-size: 1.45rem; margin: 0 0 6px; }
.course-desc { color: var(--muted); margin: 0 0 14px; flex: 1; }
.course-price { font-family: "Baloo 2", sans-serif; font-size: 1.7rem; font-weight: 800; color: var(--pink); margin: 0 0 16px; }
.course-price small { font-size: 1rem; color: var(--muted); font-weight: 600; }
.course-price.course-ask { font-size: 1.15rem; color: var(--purple); }
.btn-zalo { background: #0068ff; color: #fff; }
.courses .note a { color: #0068ff; }
@media (max-width: 960px) {
  .course-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .course-grid { grid-template-columns: 1fr; }
  .course-wide { grid-column: auto; }
}

/* Logo mới trên nền tối của chân trang */
.footer-logo img { background: #fff; border-radius: 50%; padding: 3px; }