:root {
      --primary: #6c47ff;
      --primary-2: #8f5cff;
      --primary-dark: #241946;
      --accent: #ffc700;
      --bg-dark: #1b1929;
      --white: #fff;
      --grey: #f8f8fa;
      --text: #232323;
      --radius: 1.6rem;
      --shadow-sm: 0 6px 18px rgba(60,40,140,0.10);
      --shadow: 0 8px 32px 0 rgba(60,40,140,0.14);
      --ease-snappy: cubic-bezier(.47,1.64,.41,.8);
      --transition: .18s cubic-bezier(.47,1.64,.41,.8);
      --t-fast: .18s var(--ease-snappy);
      --t-med: .28s var(--ease-snappy);
      --s-1: clamp(6px,.6vw,12px);
      --s-2: clamp(10px,1.1vw,18px);
      --s-3: clamp(16px,1.6vw,28px);
      --nav-height: 72px;
    }
    * { box-sizing: border-box; }
    body {
      background: linear-gradient(-45deg, #1b1929, #2d1e5f, #191730, #332c5e);
      background-size: 400% 400%;
      animation: gradientBG 3s ease infinite;
      margin: 0;
      font-family: 'Montserrat', Arial, sans-serif;
      color: var(--text);
      overflow-x: hidden;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }
    .container {
  width: 100%;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

@keyframes gradientBG {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
    /* Navbar - đồng bộ với global */
    nav{
      position: sticky; top: 0; z-index: 120; display: flex; align-items: center; justify-content: space-between; isolation: isolate;
      width: 100%; min-height: var(--nav-height);
      padding: 0 var(--s-3); background: linear-gradient(135deg,rgba(27,22,58,.9),rgba(12,10,26,.82));
      -webkit-backdrop-filter: saturate(10%) blur(14px); backdrop-filter: saturate(10%) blur(14px);
      transition: background var(--t-med), transform var(--t-fast);
    }
    .nav-left{ display: flex; align-items: center; gap: .9rem; z-index: 2; }
    .logo{ display: flex; align-items: center; gap: .45rem; font-weight: 800; letter-spacing: .4px; color: #f5f3ff; font-size: 1.2rem; }
    .logo a{ display: flex; align-items: center; filter: drop-shadow(0 10px 22px rgba(108,71,255,.2)); transition: transform var(--t-fast), filter var(--t-fast); }
    .logo a:hover{ transform: translateY(-1px); filter: drop-shadow(0 16px 28px rgba(108,71,255,.3)); }
    .logo img{ width: 88px; height: auto; display: block; filter: drop-shadow(0 12px 28px rgba(0,0,0,.35)); }
    .logo span{ position: relative; display: inline-flex; width: 56px; height: 12px; border-radius: 999px; background: linear-gradient(120deg,rgba(108,71,255,.75),rgba(143,92,255,.9),rgba(255,199,0,.85)); box-shadow: 0 10px 22px rgba(108,71,255,.38); overflow: hidden; }
    .logo span::before{ content: ""; position: absolute; inset: -30% -40%; background: radial-gradient(circle at 30% 40%,rgba(255,255,255,.85),transparent 70%); opacity: .9; }
    .nav-links{ display: flex; align-items: center; gap: var(--s-3); margin-left: 1.2rem; transition: var(--t-med); z-index: 2; }
    .nav-links a{ position: relative; text-decoration: none; color: rgba(236,234,255,.78); font-weight: 600; padding: 6px 0; letter-spacing: .01em; transition: color var(--t-fast), text-shadow var(--t-fast); }
    .nav-links a::after{
      content:"";
      position: absolute;
      left: 0;
      right: 0;
      bottom: -2px;
      height: 2px;
      border-radius: 999px;
      background: linear-gradient(90deg,rgba(108,71,255,.95),rgba(143,92,255,.85),rgba(255,199,0,.75));
      opacity: 0;
      transform: translateY(4px);
      transition: opacity var(--t-fast), transform var(--t-fast);
    }
    .nav-links a:hover,
    .nav-links a:focus-visible{ color: #fff; text-shadow: 0 0 18px rgba(108,71,255,.55); outline: none; }
    .nav-links a:hover::after,
    .nav-links a:focus-visible::after{ opacity: 1; transform: translateY(0); }
    .nav-links a[aria-current="page"]{ color: #fff; text-shadow: 0 0 16px rgba(108,71,255,.45); }
    .nav-links a[aria-current="page"]::after{ opacity: 1; transform: translateY(0); }
    .nav-right{ display: flex; align-items: center; gap: .7rem; z-index: 2; }
    .nav-btn{
      border: none;
      outline: none;
      cursor: pointer;
      padding: .55rem 1.4rem;
      border-radius: 999px;
      font-weight: 800;
      letter-spacing: .22em;
      transition: var(--t-fast);
      position: relative;
      overflow: hidden;
      color: #fdfbff;
      background: linear-gradient(140deg,rgba(108,71,255,.65),rgba(143,92,255,.82));
      box-shadow: 0 14px 34px rgba(18,8,60,.45);
      border: 1px solid rgba(158,140,255,.28);
    }
    .nav-btn::after{ content:""; position: absolute; inset: 0; border-radius: inherit; background: linear-gradient(120deg,rgba(255,255,255,.3),rgba(255,255,255,.05)); opacity: 0; transform: translateX(-18%); transition: opacity var(--t-fast), transform var(--t-fast); pointer-events: none; }
    .nav-btn:hover{ transform: translateY(-2px); }
    .nav-btn:hover::after{ opacity: .9; transform: translateX(0); }
    .nav-btn:focus-visible{ outline: none; box-shadow: 0 0 0 3px rgba(108,71,255,.45),0 16px 40px rgba(12,6,40,.48); }
    .nav-btn.login{ background: linear-gradient(135deg,#7151ff 0%,#9a6bfd 60%,#ffc700 120%); text-shadow: 0 10px 18px rgba(32,18,78,.4); }
    .nav-btn.register{ background: linear-gradient(135deg,rgba(14,12,32,.95),rgba(39,30,76,.9)); border: 1px solid rgba(132,112,255,.35); box-shadow: 0 12px 30px rgba(9,4,32,.5); }
    .nav-btn.register:hover{ box-shadow: 0 18px 36px rgba(9,4,32,.55); }
    .hamburger{
      display: none;
      width: 40px;
      height: 40px;
      justify-content: center;
      align-items: center;
      flex-direction: column;
      gap: 6px;
      border: none;
      background: transparent;
      cursor: pointer;
      position: relative;
      z-index: 130;
    }
    .hamburger span{ width: 26px; height: 3px; border-radius: 2px; background: linear-gradient(90deg,var(--primary),var(--primary-2)); box-shadow: 0 2px 8px rgba(108,71,255,.22); transition: transform var(--t-fast), opacity var(--t-fast), background var(--t-fast), box-shadow var(--t-fast); }
    .hamburger:hover span,
    .hamburger:focus-visible span{ background: linear-gradient(90deg,var(--primary-2),var(--accent)); box-shadow: 0 4px 10px rgba(108,71,255,.32); }
    .hamburger:focus-visible{ outline: none; box-shadow: 0 0 0 3px rgba(108,71,255,.4); border-radius: 14px; }
    .hamburger[aria-expanded="true"] span:nth-child(1){ transform: translateY(9px) rotate(45deg); }
    .hamburger[aria-expanded="true"] span:nth-child(2){ opacity: 0; transform: scaleX(.4); }
    .hamburger[aria-expanded="true"] span:nth-child(3){ transform: translateY(-9px) rotate(-45deg); }
    .nav-links-btns{ display: none; }
    a{ text-decoration: none; }
    @media (max-width:1000px){
      .hamburger{ display: flex; }
      .nav-right{ display: none; }
      nav{ flex-wrap: wrap; min-height: var(--nav-height); padding: var(--s-1) var(--s-2); }
      .nav-links{
        position: absolute;
        top: 0%;
        right: 0%;
        width: 100%;
        background: linear-gradient(190deg,rgba(26,22,60,.96),rgba(14,12,34,.94));
        flex-direction: column;
        align-items: flex-start;
        gap: var(--s-2);
        padding: calc(var(--s-2)) var(--s-3) var(--s-2);
        box-shadow: 0 32px 48px rgba(6,3,24,.6),0 0 0 1px rgba(138,122,255,.35) inset;
        -webkit-backdrop-filter: blur(18px); backdrop-filter: blur(18px);
        opacity: 0;
        pointer-events: none;
        transform: translateY(-18px);
      }
      .nav-links.open{ opacity: 1; pointer-events: auto; transform: translateY(0); }
      .nav-links-btns{ display: flex; flex-direction: column; gap: .7rem; width: 100%; margin-top: .6rem; }
      .nav-links-btns .nav-btn{ width: 100%; }
    }
    /* Header của trang cards */
    .card-header-section {
      margin: 2.5rem auto 1.2rem auto;
      max-width: 880px;
      padding: 0 1.2rem;
      text-align: center;
    }
 .card-header-section h1 {
  font-size: 2.8rem;
  font-weight: 900;
  letter-spacing: 1.3px;
  background: linear-gradient(
    90deg,
    #ffc700 0%,
    #ffe073 25%,
    #6c47ff 50%,
    #ffb347 75%,
    #ffc700 100%
  );
  background-size: 200% auto;
  background-position: 0% 50%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
  animation: gradientTextMove 2.5s ease-in-out infinite;
  text-shadow: 0 1px 14px #332c5e44;
}

@keyframes gradientTextMove {
  0% { background-position: 0% 50%;}
  100% { background-position: 100% 50%;}
}
    .card-header-section p {
      color: var(--grey);
      margin-bottom: 1.2rem;
    }
    /* Search & filter */
    .card-filter-row {
      display: flex;
      gap: 0.6rem;
      flex-wrap: wrap;
      justify-content: center;
      margin-bottom: 1.5rem;
    }
    .view-toggle {
      flex: 0 0 auto;
      border: none;
      background: none;
      padding: 0;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      position: relative;
    }
    .view-toggle:focus-visible {
      outline: 3px solid rgba(108, 71, 255, 0.35);
      outline-offset: 4px;
      border-radius: 999px;
    }
    .view-toggle .toggle-track {
      position: relative;
      width: 74px;
      height: 36px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.88);
      box-shadow: 0 8px 20px rgba(108, 71, 255, 0.22);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 10px;
      transition: background var(--t-fast), box-shadow var(--t-fast);
    }
    .view-toggle:hover .toggle-track {
      box-shadow: 0 12px 28px rgba(108, 71, 255, 0.3);
    }
    .view-toggle .toggle-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      color: rgba(36, 25, 70, 0.45);
      transition: color var(--t-fast);
    }
    .view-toggle .toggle-icon svg {
      width: 18px;
      height: 18px;
      fill: currentColor;
    }
    .view-toggle .toggle-thumb {
      position: absolute;
      top: 4px;
      left: 4px;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
      box-shadow: 0 6px 18px rgba(108, 71, 255, 0.35);
      transform: translateX(0);
      transition: transform var(--t-fast), background var(--t-fast), box-shadow var(--t-fast);
    }
    .view-toggle[data-view="presentation"] .toggle-icon-presentation {
      color: var(--primary);
    }
    .view-toggle[data-view="grid"] .toggle-icon-grid {
      color: #ff8c33;
    }
    .view-toggle[data-view="grid"] .toggle-track {
      background: rgba(255, 247, 230, 0.96);
      box-shadow: 0 10px 24px rgba(255, 140, 51, 0.25);
    }
    .view-toggle[data-view="grid"] .toggle-thumb {
      background: linear-gradient(135deg, #ff9d4d 0%, #ffc700 100%);
      box-shadow: 0 8px 20px rgba(255, 140, 51, 0.3);
      transform: translateX(38px);
    }
    @media (max-width: 600px) {
      .view-toggle {
        transform: scale(0.92);
      }
    }
    .card-search {
      flex: 1 1 240px;
      padding: 0.7rem 1.2rem;
      border: 1.7px solid var(--primary);
      border-radius: 2rem;
      font-size: 1.1rem;
      outline: none;
      transition: box-shadow 0.2s;
      box-shadow: 0 2px 8px #8856ff13;
      max-width: 320px;
    }
    .filter-btn {
      background: var(--white);
      border: 2px solid var(--primary);
      color: var(--primary-dark);
      border-radius: 2rem;
      font-size: 1.06rem;
      padding: 0.6rem 1.2rem;
      font-weight: 700;
      margin: 0 0.2rem;
      cursor: pointer;
      transition: background 0.2s, color 0.2s, box-shadow 0.2s;
    }
    .filter-btn.active, .filter-btn:hover {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 3px 18px #8856ff29;
    }

    /* Card grid */
.card-list {
  margin-left: 0.5rem ;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(170px, 19vw);  /* Tự co card theo màn hình, min 110px, max ~20% viewport */
  gap: 1.1rem;
  overflow-x: auto;
  overflow-y: visible;
  padding-bottom: 3.5rem;
  max-width: 100vw;
  scrollbar-width: thin;
  
    scrollbar-color: #6c47ff #f3e6ff00;   /* thumb - track */
}
.card-list.grid-view {
  grid-auto-flow: row;
  grid-auto-columns: unset;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  overflow-x: hidden;
  padding-bottom: 2rem;
  max-width: min(1120px, 100vw);
  margin: 0 auto 2rem auto;
}
.card-list.grid-view::-webkit-scrollbar {
  width: 0;
  height: 0;
}
.card-list.grid-view .card-box {
  scroll-snap-align: unset;
}
@media (max-width: 380px) {
  .card-list.grid-view {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.7rem;
    padding: 0 0.4rem 1.6rem;
    margin: 0 0 1.6rem 0;
  }
  .card-list.grid-view .card-box {
    margin-top: 0.9rem;
  }
}
/* Chrome, Edge, Safari */
.card-list::-webkit-scrollbar {
  height: 10px;
  background: #f3e6ff;
  border-radius: 12px;
}
.card-list::-webkit-scrollbar-thumb {
  background: linear-gradient(90deg,#6c47ff 60%,#ffc700 100%);
  border-radius: 999px;
  box-shadow: 0 2px 8px #8856ff33;
}
.card-list::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(90deg,#8856ff 80%,#ffc700 100%);
}
.card-list::-webkit-scrollbar-track {
  background: #f3e6ff;
  border-radius: 999px;
}

.card-load-more{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 1.5rem auto 2.5rem;
  padding: 0.8rem 2.4rem;
  border-radius: 999px;
  border: none;
  font-weight: 800;
  letter-spacing: .4px;
  background: linear-gradient(90deg,var(--primary) 0%,var(--primary-2) 100%);
  color: #fff;
  cursor: pointer;
  box-shadow: 0 12px 28px rgba(108,71,255,.26);
  transition: var(--t-fast);
}
.card-load-more:hover{
  transform: translateY(-2px);
  box-shadow: 0 18px 36px rgba(108,71,255,.32);
}
.card-load-more:disabled{
  opacity: .55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}
.card-load-more[hidden]{ display:none; }

.card-box {
  margin-top: 1.5rem;
  aspect-ratio: 2/3;
  border-radius: 1.1rem;
  overflow: hidden;
  box-shadow: 0 6px 24px #6c47ff29, 0 1px 8px #ffc70013;
  border: 2.5px solid #f3e6ff;
  cursor: pointer;
  background: none;
  display: flex;
  align-items: stretch;
  justify-content: stretch;
  margin-bottom: 0;
  scroll-snap-align: start;
  transition:
    box-shadow .18s cubic-bezier(.5,1.5,.38,.99),
    transform .17s cubic-bezier(.7,2.1,.21,.79),
    border-color .22s;
}
.card-box:hover {
  box-shadow: 0 18px 44px #6c47ff3a, 0 3px 22px #ffc70033;
  border-color: #ffc700;
  transform: translateY(-7px) scale(1.07) rotate(-2deg);
  z-index: 2;
}

.card-box img,
.card-art img {
  width: 100%;
  height: 100%;
  object-fit: cover;  /* QUAN TRỌNG: ảnh sẽ phủ toàn bộ box, cắt nếu lệch tỉ lệ */
  box-shadow: none;
  display: block;
  background: #f3e6ff;
  transition: filter .22s;
}
.card-box:hover img,
.card-art img:hover {
  filter: brightness(1.09) saturate(1.15);
}

    .card-icon {
      margin-bottom: 0.8rem;
      height: 60px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .card-icon img {
      height: 50px;
      max-width: 100%;
      object-fit: contain;
      filter: drop-shadow(0 3px 6px #a89cff22);
      transition: transform 0.2s ease;
    }
    .card-box h4 {
      font-size: 1.12rem;
      font-weight: 700;
      margin: 0.35rem 0 0.09rem 0;
      color: #1e0a47;
    }
    .card-box p {
      font-size: 1rem;
      color: #333;
      margin: 0 0 0.4rem 0;
    }
    .card-box a {
      display: inline-block;
      font-size: 0.95rem;
      color: var(--primary);
      text-decoration: underline;
      font-weight: 600;
      transition: color .17s;
      margin-top: 0.5rem;
    }
    .card-box a:hover { color: #ffc700; }

    /* Modal */
   .modal-bg {
      position: fixed;
      z-index: 1001;
      left: 0; top: 0; right: 0; bottom: 0;
      background: rgba(41,21,74,0.32);
      backdrop-filter: blur(3px) saturate(1.2);
      display: flex;
      justify-content: center;
      align-items: center;
      opacity: 0;
      pointer-events: none;
      transition: opacity .17s;
    }
    .modal-bg.active {
      opacity: 1;
            animation: fadeIn 0.25s;

      pointer-events: auto;
    }
    @keyframes fadeIn { from{opacity:0;} to{opacity:1;} }

    .card-modal {
      background: rgba(255, 255, 255, 0.842);
      max-width: 540px;
      min-width: 320px;
        max-height: 80vh;

      width: 97vw;
      box-shadow:
        0 16px 64px #6c47ff55,
        0 4px 32px #ffc70022;
      border: 2.5px solid;
      border-image: linear-gradient(120deg,#ffc700 40%,#6c47ff 90%) 1;
      padding: 2.7rem 2.2rem 2.2rem 2.2rem;
      position: relative;
      animation: scaleIn 0.18s;
      display: flex;
      flex-direction: column;
      align-items: center;
      font-size: 1.15rem;
      line-height: 1.55;
        overflow-y: auto;         /* Nội dung dài sẽ cuộn dọc */

    }
    @media (max-width: 600px) {
      .card-modal {
        padding: 1.5rem 0.3rem 1.1rem 0.3rem;
        max-width: 99vw;
        min-width: 0;
      }
    }
    @keyframes scaleIn { from{transform:scale(0.92); opacity: 0.7;} to{transform:scale(1); opacity: 1;} }
    .modal-close {
      position: absolute;
      top: 14px; right: 18px;
      background: rgba(255,255,255,0.95);
      border: none;
      font-size: 2.5rem;
      color: #6c47ff;
      font-weight: bold;
      cursor: pointer;
      border-radius: 50%;
      width: 48px; height: 48px;
      display: flex; align-items: center; justify-content: center;
      box-shadow: 0 4px 16px #8856ff22;
      transition: background .18s, color .16s, transform .13s;
    }
    .modal-close:hover {
      background: #ffc700;
      color: #241946;
      transform: scale(1.10) rotate(-8deg);
    }
    .modal-img {
      width: 40%; height: 40%;
      object-fit: contain;
      display: block;
      margin: 0 auto 1.5rem auto;
      border-radius: 1.5rem;
      background: #f8f8fa77;
      box-shadow: 0 2px 12px #ffc70033;
    }
    .modal-title {
      font-size: 2.1rem;
      font-weight: 900;
      color: #6c47ff;
      margin-bottom: 0.6rem;
      text-align: center;
      letter-spacing: 0.8px;
      text-shadow: 0 2px 12px #ffc70022;
    }
    .modal-desc {
      font-size: 1.16rem;
      color: #241946;
      margin-bottom: 1.1rem;
      text-align: center;
      font-weight: 600;
      padding: 0 0.2rem;
      line-height: 1.7;
    }
    .modal-extra {
      font-size: 1.13rem;
      color: #444;
      margin-bottom: 0.95rem;
      text-align: left;
      background: #f8f8fa77;
      border-radius: 1.2rem;
      padding: 1rem 1.1rem;
      box-shadow: 0 1px 8px #8856ff16;
      width: 100%;
      box-sizing: border-box;
      font-style: italic;
    }
    .modal-audio {
      text-align: center;
      width: 100%;
    }
    .modal-qr {
      text-align: center;
      margin: 1rem 0 0 0;
    }
    .modal-qr img {
      width: 70px; height: 70px;
      border-radius: 12px;
      background: #fff9;
      box-shadow: 0 2px 8px #ffc70019;
      margin-bottom: 0.2rem;
    }
    .modal-qr div {
      font-size: 1rem;
      margin-top: 0.3em;
      color: #241946;
    }
    .card-modal .modal-example{
        margin-bottom: 10px;
    }

    /* Footer giữ nguyên cho trang cards */
    footer{
      background: var(--white);
      color: #3d2476;
      text-align: center;
      padding: 1.3rem 0 1.1rem;
      font-size: 1.06rem;
      margin-top: auto;
      border-top-left-radius: 1.3rem;
      border-top-right-radius: 1.3rem;
      box-shadow: 0 -2px 12px #a494e919;
    }

    /* Responsive */
    .card-box { flex: 1 1 calc(25% - 1rem);}
    @media (max-width: 1200px) {.card-box {flex: 1 1 calc(33.33% - 1rem);}}
    @media (max-width: 900px)  {.card-box {flex: 1 1 calc(50% - 1rem);}}
    @media (max-width: 600px)  {.card-box {flex: 1 1 100%;max-width: 100%;}}
    @media (max-width: 600px) {
      .card-header-section h1 { font-size: 1.25rem;}
      .card-header-section {margin:1.5rem auto 0.8rem auto;}
      .card-list {gap:0.7rem;}
    }
.pronounce-btn {
display: inline-flex; align-items: center; gap: .5rem;
background: var(--primary); color: #fff; border: 0; cursor: pointer;
padding: .55rem 1.1rem; border-radius: 999px; font-weight: 800;
box-shadow: 0 4px 18px #8856ff3a; transition: transform .12s, box-shadow .18s;
}
.pronounce-btn:hover { transform: translateY(-2px) scale(1.03); box-shadow: 0 6px 26px #8856ff55; }
.pronounce-btn[disabled] { opacity: .55; cursor: not-allowed; }
.pronounce-btn svg { width: 18px; height: 18px; }
#modal-audio audio {
  display: none !important;
}