/* Reset + nền tảng chung */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, picture, svg, video { display: block; max-width: 100%; height: auto; }
/* <picture> nằm trong khung cắt ảnh phải giãn hết khung để object-fit hoạt động */
:is([class*="__img"], [class*="__media"], [class*="__thumb"], [class*="__cover"], [class*="__photo"], [class*="__bg"]) > picture { width: 100%; height: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
h1, h2, h3, h4 { margin: 0; line-height: 1.12; letter-spacing: -0.005em; font-weight: 800; }
p { margin: 0; }
[hidden] { display: none !important; } /* thuộc tính hidden không tự ẩn phần tử SVG */
:where(ul, ol)[role="list"] { list-style: none; margin: 0; padding: 0; } /* :where để không đè class component */

:focus-visible { outline: 2px solid var(--violet-soft); outline-offset: 3px; border-radius: 8px; }

.screen-reader-text {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.skip-link:focus {
  clip: auto; width: auto; height: auto; margin: 0; z-index: 1000;
  top: 12px; left: 12px; padding: 12px 18px; background: var(--bg-raised); border-radius: var(--r-sm);
}

/* Tiện ích */
.container { width: min(100% - 2 * var(--gutter), var(--container)); margin-inline: auto; }
.text-gradient {
  background: var(--grad-text);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.muted { color: var(--text-secondary); }

/* Nút */
.btn {
  --_pad-x: 26px; --_pad-y: 15px;
  position: relative; isolation: isolate;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: var(--_pad-y) var(--_pad-x);
  border-radius: var(--r-pill);
  font-weight: 700; font-size: 1rem; line-height: 1;
  transition: transform var(--dur-fast) var(--ease-out);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0) scale(.98); }
.btn--primary { color: #fff; background: var(--grad-cta); box-shadow: inset 0 1px 0 rgb(255 255 255 / .35); }
/* Lớp phát sáng riêng: đổi opacity thay vì animate box-shadow (mượt hơn) */
.btn--primary::after {
  content: ""; position: absolute; inset: 0; z-index: -1; border-radius: inherit;
  box-shadow: var(--glow-pink); opacity: .9; transition: opacity var(--dur-fast);
}
.btn--primary:hover::after { opacity: 1; box-shadow: 0 14px 44px rgb(255 79 216 / .75); }
.btn--ghost { background: var(--glass-strong); border: 1px solid rgb(255 255 255 / .18); color: var(--text-primary); }
.btn--light { background: var(--text-primary); color: #140F2E; }
.btn--sm { --_pad-x: 18px; --_pad-y: 11px; font-size: .875rem; }

/* Nhãn nhỏ phía trên tiêu đề section */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: var(--r-pill);
  background: rgb(168 85 247 / .12); border: 1px solid rgb(192 132 252 / .35);
  color: var(--lilac); font-size: var(--fs-xs); font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--grad-text); }

/* Thẻ kính */
.glass {
  background: var(--grad-card);
  border: 1px solid var(--glass-border-soft);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}