:root {
  /* Tone màu thương hiệu CLB Yêu Ca Hát Thu Hà: Xanh Navy đậm + Tím + Vàng Gold */
  --navy-deep: #091128;
  --navy-main: #101C42;
  --navy-card: #162454;
  --purple-main: #4A195E;
  --purple-gradient: linear-gradient(135deg, #6B1D57 0%, #101C42 52%, #0A148A 100%);
  --gold-main: #F5C542;
  --gold-bright: #FFD700;
  --text-white: #FFFFFF;
  --text-cream: #F8FAFC;

  /* Quy ước màu nút hành động chính theo Brief kỹ thuật */
  --btn-watch-green: #15803D;
  --btn-watch-green-hover: #166534;
  --btn-buy-orange: #EA580C;
  --btn-buy-orange-hover: #C2410C;
  --btn-renew-darkorange: #B91C1C;

  /* Quy chuẩn kích thước chữ tối thiểu cho người lớn tuổi */
  --base-font-size: 18px;
  --lesson-title-size: 24px;
  --btn-font-size: 19px;
  --radius-lg: 16px;
  --radius-md: 12px;
}

body.font-large {
  --base-font-size: 20px;
  --lesson-title-size: 26px;
  --btn-font-size: 21px;
}

body.font-xlarge {
  --base-font-size: 22px;
  --lesson-title-size: 28px;
  --btn-font-size: 23px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Be Vietnam Pro', sans-serif;
  font-size: var(--base-font-size);
  line-height: 1.65;
  background-color: var(--navy-deep);
  color: var(--text-white);
  overflow-x: hidden;
  word-wrap: break-word;
}

a {
  color: inherit;
  text-decoration: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 20px;
}

.text-left {
  text-align: left !important;
}

.btn-full {
  width: 100%;
}

/* =========================================================
   1. THANH TIỆN ÍCH CHỈNH CỠ CHỮ (SENIOR UTILITY BAR)
   ========================================================= */
.senior-utility-bar {
  background: #060B19;
  border-bottom: 2px solid rgba(245, 197, 66, 0.35);
  padding: 10px 0;
}

.utility-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.utility-hotline {
  font-weight: 700;
  color: var(--gold-main);
}

.utility-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.utility-label {
  font-weight: 600;
}

.font-btn {
  background: var(--navy-card);
  color: var(--text-white);
  border: 2px solid var(--gold-main);
  min-height: 44px;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.font-btn.active,
.font-btn:hover {
  background: var(--gold-main);
  color: var(--navy-deep);
}

/* =========================================================
   2. HEADER & MENU LỒNG LOGO CLB YÊU CA HÁT THU HÀ
   ========================================================= */
.site-header {
  background: var(--purple-gradient);
  border-bottom: 3px solid var(--gold-main);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.55);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  gap: 14px;
  position: relative;
}

/* Cụm Logo xếp 2 dòng gọn gàng để không đẩy Menu rớt dòng */
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 14px;
  border-radius: 14px;
  background: rgba(9, 17, 40, 0.55);
  border: 2px solid rgba(245, 197, 66, 0.75);
  flex-shrink: 0;
}

.logo-icons {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: linear-gradient(135deg, #FB565A 0%, #8A3FFC 100%);
  border: 2px solid #FFFFFF;
  flex-shrink: 0;
}

.logo-icons svg {
  width: 30px;
  height: 30px;
  fill: #FFFFFF;
  filter: drop-shadow(0 0 6px rgba(255, 255, 255, 0.9));
}

.logo-text-wrap {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.logo-title-glow {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: 20px;
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  text-shadow: 0 0 8px rgba(255, 255, 255, 0.95), 0 0 16px rgba(245, 197, 66, 0.75);
  line-height: 1.2;
}

.logo-subtitle {
  font-size: 13px;
  font-weight: 700;
  color: var(--gold-main);
  line-height: 1.3;
  margin-top: 2px;
}

/* 1. Khung tổng Header chia thành 2 hàng dọc */
.header-inner {
  display: flex;
  flex-direction: column;
  padding: 12px 0 16px;
  gap: 12px;
}

/* 2. Hàng trên chứa Logo và các nút bên phải */
.header-top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  gap: 12px;
}

/* 3. Hàng dưới: Thanh Menu nằm ở dưới */
.primary-nav-wrapper {
  width: 100%;
  border-top: 1px solid rgba(245, 197, 66, 0.25);
  padding-top: 10px;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  list-style: none;
}

.nav-link,
.main-nav li a {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-white);
  padding: 10px 14px;
  border-radius: 10px;
  border: 2px solid transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active,
.main-nav li.current-menu-item a {
  background: rgba(245, 197, 66, 0.18);
  border-color: var(--gold-main);
  color: var(--gold-main);
}

/* Cụm nút bên phải: TÀI KHOẢN + ☰ DANH MỤC đồng bộ 100% */
.header-right-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.btn-login-header {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  background: var(--gold-main);
  color: var(--navy-deep);
  font-family: inherit;
  font-size: 18px;
  font-weight: 800;
  padding: 10px 22px;
  border-radius: 12px;
  border: 2px solid #FFFFFF;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(245, 197, 66, 0.35);
  transition: all 0.2s ease;
}

.btn-login-header:hover {
  background: var(--gold-bright);
  transform: translateY(-1px);
}

/* Nút ☰ DANH MỤC: Thiết kế đồng bộ chiều cao, bo góc, viền Vàng Gold với nút Tài khoản */
.btn-mobile-menu {
  display: none; /* Ẩn trên màn hình lớn khi menu ngang đã hiển thị */
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  padding: 10px 20px;
  font-family: inherit;
  font-size: 18px;
  font-weight: 800;
  color: var(--gold-main);
  background: rgba(9, 17, 40, 0.85);
  border: 2px solid var(--gold-main);
  border-radius: 12px;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
  transition: all 0.2s ease;
}

.btn-mobile-menu:hover,
.btn-mobile-menu.is-active {
  background: var(--gold-main);
  color: var(--navy-deep);
  border-color: #FFFFFF;
}

.menu-icon-bars {
  font-size: 20px;
  line-height: 1;
}

/* =========================================================
   3. HỆ THỐNG NÚT HÀNH ĐỘNG CHÍNH (CHỮ >= 18PX, VÙNG CHẠM LỚN)
   ========================================================= */
.btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 60px;
  padding: 16px 26px;
  font-size: var(--btn-font-size);
  font-weight: 800;
  border-radius: var(--radius-md);
  border: 2px solid rgba(255, 255, 255, 0.4);
  cursor: pointer;
  text-align: center;
  transition: all 0.2s ease;
  line-height: 1.3;
}

.btn-watch {
  background-color: var(--btn-watch-green);
  color: #FFFFFF;
}
.btn-watch:hover {
  background-color: var(--btn-watch-green-hover);
}

.btn-buy {
  background-color: var(--btn-buy-orange);
  color: #FFFFFF;
}
.btn-buy:hover {
  background-color: var(--btn-buy-orange-hover);
}

.btn-renew {
  background-color: var(--btn-renew-darkorange);
  color: #FFFFFF;
}

.btn-submit-song {
  background: linear-gradient(135deg, #F5C542 0%, #EA580C 100%);
  color: #091128;
  border-color: #FFFFFF;
}

/* =========================================================
   4. HERO SECTION & KHUNG GIẢNG VIÊN THU HÀ
   ========================================================= */
.hero-section {
  background:
    radial-gradient(circle at 85% 20%, rgba(168, 85, 247, 0.28) 0%, transparent 45%),
    linear-gradient(180deg, #121E4A 0%, #091128 100%);
  padding: 52px 0;
  border-bottom: 2px solid rgba(245, 197, 66, 0.3);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.95fr;
  gap: 36px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  background: rgba(245, 197, 66, 0.2);
  border: 2px solid var(--gold-main);
  color: var(--gold-main);
  font-weight: 700;
  padding: 8px 18px;
  border-radius: 99px;
  margin-bottom: 16px;
}

.hero-title {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 18px;
}

.hero-title span {
  color: var(--gold-main);
  text-decoration: underline;
  text-underline-offset: 6px;
}

.hero-desc {
  font-size: calc(var(--base-font-size) + 2px);
  color: var(--text-cream);
  margin-bottom: 24px;
}

.hero-highlights {
  list-style: none;
  margin-bottom: 28px;
  display: grid;
  gap: 12px;
}

.hero-highlights li {
  background: rgba(22, 36, 84, 0.85);
  border-left: 5px solid var(--gold-main);
  padding: 14px 18px;
  border-radius: 10px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.teacher-card {
  background: linear-gradient(160deg, #1E295E 0%, #3B1654 100%);
  border: 3px solid var(--gold-main);
  border-radius: 22px;
  padding: 28px;
  text-align: center;
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.5);
}

.teacher-avatar-box {
  width: 150px;
  height: 150px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, #FB565A 0%, #8A3FFC 100%);
  border: 4px solid var(--gold-main);
  display: flex;
  align-items: center;
  justify-content: center;
}

.teacher-avatar-box svg {
  width: 68px;
  height: 68px;
  fill: #FFFFFF;
}

.teacher-name {
  font-size: 26px;
  font-weight: 800;
  color: var(--gold-main);
  margin-bottom: 6px;
}

.teacher-role {
  font-weight: 700;
  color: var(--text-cream);
  margin-bottom: 14px;
}

.teacher-quote {
  color: var(--text-cream);
  margin-bottom: 18px;
}

.teacher-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.stat-item {
  background: rgba(9, 17, 40, 0.65);
  border: 1px solid rgba(245, 197, 66, 0.45);
  padding: 14px 10px;
  border-radius: 12px;
}

.stat-num {
  font-size: 24px;
  font-weight: 800;
  color: var(--gold-main);
  display: block;
}

.stat-label {
  font-size: 16px;
  color: var(--text-cream);
}

/* =========================================================
   5. THƯ VIỆN BÀI HỌC & BỘ LỌC TÌM KIẾM
   ========================================================= */
.section-block {
  padding: 60px 0;
  border-bottom: 2px solid rgba(245, 197, 66, 0.2);
}

.section-header {
  text-align: center;
  max-width: 860px;
  margin: 0 auto 36px;
}

.section-title {
  font-size: 30px;
  font-weight: 800;
  color: var(--gold-main);
  margin-bottom: 12px;
  line-height: 1.3;
}

.section-subtitle,
.section-desc-text {
  color: var(--text-cream);
}

.subsection-heading {
  font-size: 24px;
  font-weight: 800;
  color: var(--gold-main);
  margin: 28px 0 18px;
  line-height: 1.35;
}

.library-search-box {
  background: var(--navy-card);
  border: 3px solid var(--gold-main);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 30px;
}

.search-row {
  display: grid;
  grid-template-columns: 1.8fr 1fr auto;
  gap: 16px;
  margin-bottom: 18px;
}

.input-large,
.select-large {
  width: 100%;
  min-height: 60px;
  padding: 14px 18px;
  font-size: var(--base-font-size);
  font-family: inherit;
  font-weight: 600;
  color: #091128;
  background: #FFFFFF;
  border: 3px solid transparent;
  border-radius: 12px;
}

.input-large:focus,
.select-large:focus {
  outline: none;
  border-color: var(--gold-main);
}

.genre-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.genre-pill {
  min-height: 50px;
  background: var(--navy-deep);
  color: var(--text-white);
  border: 2px solid rgba(245, 197, 66, 0.55);
  padding: 10px 20px;
  border-radius: 99px;
  font-family: inherit;
  font-size: var(--base-font-size);
  font-weight: 700;
  cursor: pointer;
}

.genre-pill.active,
.genre-pill:hover {
  background: var(--gold-main);
  color: var(--navy-deep);
  border-color: #FFFFFF;
}

.lesson-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.lesson-card {
  background: linear-gradient(180deg, #162454 0%, #0F1A3F 100%);
  border: 2px solid rgba(245, 197, 66, 0.45);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
}

.lesson-top-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.lesson-number {
  background: var(--purple-main);
  border: 2px solid var(--gold-main);
  color: var(--gold-main);
  font-weight: 800;
  padding: 6px 14px;
  border-radius: 8px;
}

.lesson-genre {
  background: rgba(255, 255, 255, 0.12);
  padding: 6px 14px;
  border-radius: 8px;
  font-weight: 600;
}

.lesson-title {
  font-size: var(--lesson-title-size);
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.35;
  margin: 12px 0;
}

.lesson-details {
  list-style: none;
  display: grid;
  gap: 8px;
  color: var(--text-cream);
}

.access-status-badge {
  display: inline-block;
  padding: 10px 14px;
  border-radius: 10px;
  font-weight: 700;
  margin-top: 14px;
  width: 100%;
}

.status-valid {
  background: rgba(21, 128, 61, 0.25);
  border: 2px solid #4ADE80;
  color: #86EFAC;
}

.status-unowned {
  background: rgba(234, 88, 12, 0.2);
  border: 2px solid #FB923C;
  color: #FDBA74;
}

.status-expired {
  background: rgba(185, 28, 28, 0.25);
  border: 2px solid #F87171;
  color: #FCA5A5;
}

.section-bottom-cta {
  text-align: center;
  margin-top: 36px;
}

/* =========================================================
   6. GÓI KHÓA HỌC & KHU VỰC GỬI BÀI SỬA
   ========================================================= */
.packages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.package-card {
  background: var(--navy-card);
  border: 2px solid rgba(245, 197, 66, 0.5);
  border-radius: var(--radius-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
  position: relative;
}

.package-card.popular {
  background: linear-gradient(180deg, #2D1950 0%, #162454 100%);
  border: 3px solid var(--gold-main);
}

.popular-tag {
  position: absolute;
  top: -15px;
  right: 20px;
  background: var(--gold-main);
  color: var(--navy-deep);
  font-weight: 800;
  padding: 5px 14px;
  border-radius: 99px;
  font-size: 15px;
}

.pkg-name {
  font-size: 24px;
  font-weight: 800;
  color: var(--gold-main);
  margin-bottom: 8px;
}

.pkg-price {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 14px;
}

.pkg-features {
  list-style: none;
  display: grid;
  gap: 10px;
}

.submit-song-highlight {
  background: linear-gradient(135deg, #3B1254 0%, #142252 60%, #0D1840 100%);
  border: 3px solid var(--gold-main);
  border-radius: 22px;
  padding: 36px;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 30px;
  align-items: center;
}

.fee-rule-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 18px;
  background: rgba(9, 17, 40, 0.8);
  border-radius: 12px;
  overflow: hidden;
}

.fee-rule-table th,
.fee-rule-table td {
  border: 1px solid rgba(245, 197, 66, 0.45);
  padding: 14px 16px;
  text-align: left;
}

.fee-rule-table th {
  background: rgba(245, 197, 66, 0.22);
  color: var(--gold-main);
  font-weight: 800;
}

.fee-free {
  color: #4ADE80;
  font-weight: 800;
}

.upload-demo-card {
  background: var(--navy-deep);
  border: 3px dashed var(--gold-main);
  border-radius: 18px;
  padding: 28px;
  text-align: center;
}

.upload-card-title {
  font-size: 24px;
  color: var(--gold-main);
  margin-bottom: 12px;
}

.upload-card-desc {
  margin-bottom: 22px;
}

.upload-card-actions {
  display: grid;
  gap: 16px;
}

/* 3 Bước Hướng Dẫn */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step-card {
  background: var(--navy-card);
  border: 2px solid rgba(245, 197, 66, 0.45);
  border-radius: var(--radius-lg);
  padding: 26px;
}

.step-badge {
  display: inline-block;
  background: var(--gold-main);
  color: var(--navy-deep);
  font-weight: 800;
  padding: 6px 16px;
  border-radius: 99px;
  margin-bottom: 14px;
}

.step-title {
  font-size: 23px;
  color: var(--gold-main);
  margin-bottom: 10px;
}

/* =========================================================
   7. FOOTER
   ========================================================= */
.site-footer {
  background: #050A18;
  border-top: 3px solid var(--gold-main);
  padding: 48px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 28px;
}

.footer-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--gold-main);
  margin-bottom: 14px;
}

.footer-links {
  list-style: none;
  display: grid;
  gap: 12px;
}

/* =========================================================
   8. RESPONSIVE CHO LAPTOP NHỎ & MÁY TÍNH BẢNG - TABLET (<= 1180px)
   ========================================================= */
@media (max-width: 1180px) {
  .header-inner {
    flex-wrap: wrap;
  }

  /* Hiển thị nút ☰ DANH MỤC đồng bộ cạnh nút TÀI KHOẢN */
  .btn-mobile-menu {
    display: inline-flex;
  }

  /* Ẩn menu ngang và chuyển thành ngăn kéo xổ xuống khi bấm ☰ DANH MỤC */
  .primary-nav-wrapper {
    display: none;
    width: 100%;
    flex: 0 0 100%;
    order: 3;
    background: rgba(9, 17, 40, 0.98);
    border: 2px solid var(--gold-main);
    border-radius: 14px;
    padding: 16px;
    margin-top: 8px;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.6);
  }

  .primary-nav-wrapper.is-open {
    display: block;
    animation: thuhaSlideDown 0.2s ease-out;
  }

  @keyframes thuhaSlideDown {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .main-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .nav-link,
  .main-nav li a {
    width: 100%;
    min-height: 54px;
    font-size: var(--base-font-size);
    padding: 12px 18px;
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(245, 197, 66, 0.35);
  }

  .hero-grid,
  .submit-song-highlight {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  /* Tablet hiển thị 2 cột cân đối */
  .lesson-grid,
  .packages-grid,
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .search-row {
    grid-template-columns: 1fr 1fr;
  }

  .search-input-wrap {
    grid-column: 1 / -1;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* =========================================================
   9. RESPONSIVE CHO ĐIỆN THOẠI - MOBILE (<= 768px)
   ========================================================= */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
    .header-inner {
        padding: 12px 16px 16px;
    }
  .utility-inner {
    flex-direction: column;
    align-items: stretch;
    text-align: center;
  }

  .utility-controls {
    justify-content: center;
  }

  .font-btn {
    flex: 1 1 auto;
    min-height: 48px;
    font-size: 16px;
    padding: 8px 10px;
  }

  /* Trên điện thoại: Logo dòng 1, Nút TÀI KHOẢN & ☰ DANH MỤC chia đôi dòng 2 rất to và đều nhau */
  .brand-logo {
    width: 100%;
    justify-content: center;
  }

  .header-right-actions {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .header-top-row {
    flex-direction: column;
}
  .btn-login-header,
  .btn-mobile-menu {
    width: 100%;
    min-height: 56px;
    font-size: 16px;
    justify-content: center;
    padding: 0;
  }

  .hero-section {
    padding: 36px 0;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-cta-group {
    flex-direction: column;
    gap: 14px;
  }

  .hero-cta-group .btn-action,
  .section-bottom-cta .btn-action {
    width: 100%;
    min-height: 62px;
  }

  .lesson-grid,
  .packages-grid,
  .steps-grid,
  .footer-grid,
  .search-row {
    grid-template-columns: 1fr;
  }

  .genre-pills {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .genre-pill {
    width: 100%;
    text-align: center;
    padding: 12px 10px;
    border-radius: 12px;
  }

  .genre-pill:first-child {
    grid-column: 1 / -1;
  }

  .section-block {
    padding: 42px 0;
  }

  .section-title {
    font-size: 25px;
  }

  .submit-song-highlight {
    padding: 22px 18px;
  }

  /* Bảng phí sửa bài tự chuyển sang thẻ dọc dễ nhìn trên điện thoại */
  .fee-rule-table thead {
    display: none;
  }

  .fee-rule-table,
  .fee-rule-table tbody,
  .fee-rule-table tr,
  .fee-rule-table td {
    display: block;
    width: 100%;
  }

  .fee-rule-table tr {
    margin-bottom: 14px;
    border: 2px solid var(--gold-main);
    border-radius: 12px;
    overflow: hidden;
  }

  .fee-rule-table td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    text-align: right;
    border: none;
    border-bottom: 1px solid rgba(245, 197, 66, 0.3);
  }

  .fee-rule-table td::before {
    content: attr(data-label);
    font-weight: 700;
    color: var(--gold-main);
    text-align: left;
  }
}

@media (max-width: 480px) {
  .teacher-stats,
  .genre-pills {
    grid-template-columns: 1fr;
  }

  .lesson-card,
  .package-card,
  .teacher-card,
  .library-search-box {
    padding: 20px 16px;
  }
}