/* ===== Nền tảng ===== */
:root {
  --accent: #ff9f1c;
  --bg: #07070b;
  --surface: rgba(255, 255, 255, 0.04);
  --line: rgba(255, 255, 255, 0.1);
  --text: #f4f4f6;
  --muted: #a3a3ad;
  --dim: #6f6f7a;
  --text-2: #d0d0d6;          /* chữ phụ */
  --line-strong: rgba(255, 255, 255, 0.35);
  --card-bg: #15151c;
  --header-bg: color-mix(in srgb, var(--bg) 82%, transparent);
  --title-shadow: 0 4px 30px rgba(0, 0, 0, .55);
  --eyebrow-shadow: 0 0 1px rgba(255, 255, 255, 0.3);
  --star-off: #3a3a44;
  --scrollbar: #2a2a33;
  --bubble-opacity: .55;
  --radius: 4px;
  --font-heading: 'Montserrat', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --container: 1120px;
  --gutter: 24px;  /* khoảng cách 2 bên mép, dùng chung để mọi khối thẳng hàng */
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.65 var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
section { padding: 72px 0; scroll-margin-top: 72px; }

.h2 {
  font: 700 clamp(28px, 3.6vw, 40px)/1.15 var(--font-heading);
  margin: 0 0 18px;
  letter-spacing: -0.01em;
}
.eyebrow {
  margin: 0 0 6px;
  font: 600 14px/1.3 var(--font-heading);
  color: var(--dim);
  text-shadow: var(--eyebrow-shadow);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 40px; padding: 0 24px;
  border-radius: 999px;
  font: 500 13px/1 var(--font-body);
  white-space: nowrap;
  transition: transform .2s, box-shadow .2s, background .2s, border-color .2s;
}
.btn--accent { background: var(--accent); color: #111; box-shadow: 0 8px 28px -8px var(--accent); }
.btn--accent:hover { transform: translateY(-2px); box-shadow: 0 12px 32px -6px var(--accent); }
.btn--outline { border: 1.5px solid var(--line-strong); }
.btn--outline:hover { border-color: var(--accent); color: var(--accent); }
.btn--lg { height: 52px; padding: 0 36px; font-size: 15px; }

/* ===== Header ===== */
.header {
  position: sticky; top: 0; z-index: 50;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
.header.is-scrolled { border-bottom-color: var(--line); }
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.logo { display: inline-flex; align-items: center; gap: 8px; }
.logo img { max-height: 40px; width: auto; }
.logo__mark {
  display: grid; place-items: center;
  width: 34px; height: 34px;
  background: var(--text); color: var(--bg); border-radius: 3px;
}
.logo__text { display: flex; flex-direction: column; line-height: 1; }
.logo__text b { font: 800 15px/1 var(--font-heading); letter-spacing: .02em; }
.logo__text small { font-size: 8px; letter-spacing: .35em; color: var(--muted); margin-top: 3px; }

.nav { display: flex; align-items: center; gap: 36px; font-size: 13px; }
.nav > a:not(.btn) { color: var(--text-2); transition: color .2s; white-space: nowrap; }
.nav > a:not(.btn):hover { color: var(--accent); }
.nav-toggle { display: none; }

/* ===== Hero ===== */
.hero { padding: 24px 0 56px; }
.hero__inner { position: relative; display: grid; grid-template-columns: 1fr 1fr; align-items: center; min-height: 480px; }
.hero__text { position: relative; z-index: 2; grid-row: 1; grid-column: 1 / span 2; pointer-events: none; }
.hero__text a, .hero__text button { pointer-events: auto; }
.hero__title {
  margin: 0 0 32px;
  font: 600 clamp(38px, 5.6vw, 66px)/1.12 var(--font-heading);
  letter-spacing: -0.01em;
  text-shadow: var(--title-shadow);
}
.hero__line { display: block; overflow-wrap: anywhere; }
.hero__text { min-width: 0; }
.hero__line--0 { padding-left: 1.05em; }
.hero__line--2 { padding-left: 1.2em; }
.hero__actions { display: flex; align-items: center; gap: 16px; padding-left: 1.2em; font-size: clamp(38px, 5.6vw, 66px); }
.hero__actions > * { font-size: 13px; }
.hero__media { grid-row: 1; grid-column: 2; align-self: stretch; margin-left: -12%; max-height: 520px; }
.hero__media img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius); }
.hero--img-left .hero__text { text-align: right; }
.hero--img-left .hero__media { grid-column: 1; margin: 0 -12% 0 0; }
.hero--img-left .hero__line { padding-left: 0; }
.hero--img-left .hero__line--0 { padding-right: 1.05em; }
.hero--img-left .hero__line--2 { padding-right: 1.2em; }
.hero--img-left .hero__actions { justify-content: flex-end; padding: 0 1.2em 0 0; }

.play-btn {
  display: grid; place-items: center;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: transparent;
  border: 1.5px solid var(--line-strong);
  transition: background .2s, color .2s, border-color .2s, transform .2s;
}
.play-btn svg { margin-left: 2px; }
.play-btn:hover { background: var(--text); color: var(--bg); transform: scale(1.06); }

/* ===== Services ===== */
.services { padding: 32px 0 56px; }
.services__inner { display: flex; align-items: center; gap: 40px; }
.services__intro { margin: 0; flex: 0 0 auto; max-width: 200px; font-size: 12px; line-height: 1.55; color: var(--text-2); }
.services__list {
  flex: 1; display: grid; grid-template-columns: repeat(var(--count), minmax(0, 1fr));
  list-style: none; margin: 0; padding: 0; gap: 24px;
}
.service { display: flex; flex-direction: column; align-items: center; gap: 14px; text-align: center; font-size: 14px; font-weight: 500; }
.service svg { transition: color .25s, transform .25s; }
.service:hover svg { color: var(--accent); transform: translateY(-3px); }

/* ===== About ===== */
.about__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about__media img { width: 100%; aspect-ratio: 4 / 3.3; object-fit: cover; border-radius: var(--radius); }
.about--img-right .about__media { order: 2; }
.about--noimg .about__inner { grid-template-columns: 1fr; max-width: 720px; text-align: center; }
.about__body { margin: 0 0 28px; color: var(--text-2); font-size: 13.5px; line-height: 1.75; }

/* ===== Portfolio ===== */
.section-head { text-align: center; margin-bottom: 36px; }
.section-head .h2 { margin: 0; }
.filters { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin: -12px 0 32px; }
.filter {
  height: 34px; padding: 0 18px;
  border-radius: 999px; border: 1px solid var(--line); background: transparent;
  font-size: 13px; color: var(--muted);
  transition: all .2s;
}
.filter:hover { color: var(--text); border-color: var(--line-strong); }
.filter.is-active { background: var(--accent); border-color: var(--accent); color: #111; }

.grid { display: grid; grid-template-columns: repeat(var(--cols, 3), minmax(0, 1fr)); gap: 16px; }
.card.is-hidden { display: none; }
.card.is-filter-in { animation: filterIn .45s cubic-bezier(.2, .7, .2, 1) both; }
@keyframes filterIn { from { opacity: 0; transform: translateY(14px) scale(.97); } }
.card__btn {
  position: relative; display: block; width: 100%; padding: 0;
  border: 0; border-radius: var(--radius); overflow: hidden;
  background: var(--card-bg); text-align: center; color: #fff;
}
.card__btn img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .6s cubic-bezier(.2, .7, .2, 1); }
.card__ph { position: absolute; inset: 0; display: grid; place-items: center; color: var(--dim); background: var(--card-bg); }
.card__shade { position: absolute; inset: 0; background: linear-gradient(to top, rgba(0, 0, 0, .78) 0%, rgba(0, 0, 0, .15) 45%, rgba(0, 0, 0, .1) 100%); transition: background .3s; }
.card__play {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  display: grid; place-items: center;
  width: 46px; height: 46px; border-radius: 50%;
  background: rgba(255, 255, 255, .22); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  transition: transform .3s, background .3s, color .3s;
}
.card__play svg { margin-left: 2px; }
.card__meta { position: absolute; left: 12px; right: 12px; bottom: 16px; display: flex; flex-direction: column; gap: 2px; }
.card__meta strong { font: 600 14px/1.3 var(--font-heading); }
.card__meta small { font-size: 11.5px; color: #d2d2d8; }
.card__btn img.lb { transform: scale(1.34); }
.card__btn:hover img { transform: scale(1.06); }
.card__btn:hover img.lb { transform: scale(1.42); }
.card__btn:hover .card__play { background: var(--accent); color: #111; transform: translate(-50%, -50%) scale(1.1); }
.empty { grid-column: 1 / -1; text-align: center; color: var(--dim); }

/* ===== Reviews ===== */
.reviews { padding-bottom: 40px; }
.reviews__stage { position: relative; height: 380px; max-width: 760px; margin: 0 auto; }
.bubble {
  position: absolute; transform: translate(-50%, -50%);
  border-radius: 50%; object-fit: cover;
  opacity: var(--bubble-opacity); filter: grayscale(.2);
  animation: float 7s ease-in-out infinite;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .5);
}
@keyframes float { 50% { transform: translate(-50%, calc(-50% - 12px)); } }
.reviews__head { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; z-index: 2; }
.reviews__head .h2 { max-width: 420px; margin: 0 auto 10px; text-shadow: var(--title-shadow); }
.stars { display: flex; justify-content: center; gap: 3px; color: var(--accent); font-size: 14px; letter-spacing: 1px; }
.stars .off { color: var(--star-off); }
.reviews__track {
  display: grid; grid-auto-flow: column; grid-auto-columns: minmax(280px, 340px); gap: 16px;
  overflow-x: auto; scroll-snap-type: x mandatory;
  --track-pad: max(var(--gutter), calc((100vw - var(--container)) / 2 + var(--gutter)));
  padding: 8px var(--track-pad) 24px;
  scroll-padding-inline: var(--track-pad);
  scrollbar-width: none;
}
.reviews__track::-webkit-scrollbar { display: none; }
.reviews__nav { display: flex; justify-content: flex-end; gap: 8px; margin-top: -4px; }
.reviews__nav[hidden] { display: none; }
.reviews__arrow {
  display: grid; place-items: center; width: 40px; height: 40px; padding: 0;
  border-radius: 50%; border: 1px solid var(--line); background: transparent; color: var(--text-2);
  transition: color .2s, border-color .2s, opacity .2s;
}
.reviews__arrow svg { display: block; }
.reviews__arrow:hover:not(:disabled) { color: var(--accent); border-color: var(--accent); }
.reviews__arrow:disabled { opacity: .3; cursor: default; }
.review {
  margin: 0; padding: 22px; scroll-snap-align: start;
  background: var(--surface); border: 1px solid var(--line); border-radius: 10px;
  display: flex; flex-direction: column; gap: 14px;
}
.review .stars { justify-content: flex-start; font-size: 12px; }
.review blockquote { margin: 0; color: var(--text-2); font-size: 13.5px; flex: 1; }
.review figcaption { display: flex; align-items: center; gap: 10px; }
.review figcaption img, .review__initial { width: 38px; height: 38px; border-radius: 50%; object-fit: cover; }
.review__initial { display: grid; place-items: center; background: var(--accent); color: #111; font-weight: 700; }
.review figcaption strong { display: block; font-size: 13.5px; }
.review figcaption small { color: var(--dim); font-size: 12px; }

/* ===== Contact ===== */
.contact__inner { text-align: center; max-width: 720px; }
.contact__text { color: var(--muted); margin: 0 0 28px; }
.contact__info { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 28px; list-style: none; padding: 0; margin: 32px 0 20px; font-size: 14px; color: var(--text-2); }
.contact__info li { display: flex; align-items: center; gap: 8px; }
.contact__info svg { color: var(--accent); }
.contact__info a:hover { color: var(--accent); }
.socials { display: flex; justify-content: center; gap: 10px; }
.socials a {
  display: grid; place-items: center; width: 40px; height: 40px;
  border-radius: 50%; border: 1px solid var(--line); color: var(--text-2);
  transition: all .2s;
}
.socials a:hover { color: #111; background: var(--accent); border-color: var(--accent); }

/* ===== Footer ===== */
.footer { border-top: 1px solid var(--line); padding: 28px 0; }
.footer__inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer p { margin: 0; color: var(--dim); font-size: 13px; }
.footer .socials a { width: 34px; height: 34px; }
.footer .socials svg { width: 16px; height: 16px; }

/* ===== Lightbox ===== */
.lightbox { color: #fff; position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; padding: 24px var(--gutter); }
.lightbox[hidden] { display: none; }
.lightbox__backdrop { position: absolute; inset: 0; background: rgba(0, 0, 0, .88); backdrop-filter: blur(6px); animation: fade .25s; }
.lightbox__box { position: relative; width: min(1100px, 100%, (100vh - 140px) * 16 / 9); animation: pop .3s cubic-bezier(.2, .8, .2, 1); }
.lightbox__box.is-vertical { width: min(420px, 100%); }
.lightbox__frame { position: relative; aspect-ratio: 16 / 9; background: #000; border-radius: 8px; overflow: hidden; box-shadow: 0 30px 80px rgba(0, 0, 0, .6); }
.lightbox__box.is-vertical .lightbox__frame { aspect-ratio: 9 / 16; max-height: 85vh; margin: 0 auto; }
.lightbox__frame iframe, .lightbox__frame video { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.lightbox__close {
  position: absolute; top: -48px; right: 0;
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .3); background: transparent;
  font-size: 26px; line-height: 1;
}
.lightbox__close:hover { background: #fff; color: #000; }
@keyframes fade { from { opacity: 0; } }
@keyframes pop { from { opacity: 0; transform: scale(.94); } }


/* ===== Theme sáng ===== */
:root[data-theme='light'] {
  color-scheme: light;
  --surface: #ffffff;
  --line: rgba(15, 15, 25, 0.1);
  --text: #15151c;
  --muted: #5d5d6a;
  --dim: #8a8a96;
  --text-2: #3d3d48;
  --line-strong: rgba(15, 15, 25, 0.3);
  --card-bg: #e6e5e1;
  --title-shadow: 0 2px 24px rgba(255, 255, 255, .7);
  --eyebrow-shadow: none;
  --star-off: #d4d3cf;
  --scrollbar: #cfcfcf;
  --bubble-opacity: .9;
}
:root[data-theme='light'] .review { box-shadow: 0 6px 24px -12px rgba(0, 0, 0, .18); }
:root[data-theme='light'] .bubble { box-shadow: 0 10px 30px rgba(0, 0, 0, .18); }
:root[data-theme='light'] .hero__media img { box-shadow: 0 30px 60px -30px rgba(0, 0, 0, .45); }
/* Chữ tối không đè lên ảnh tối */
:root[data-theme='light'] .hero__media { margin-left: 0; }
:root[data-theme='light'] .hero--img-left .hero__media { margin-right: 0; }
@media (min-width: 761px) {
  :root[data-theme='light'] .hero__inner { grid-template-columns: 1.2fr 1fr; column-gap: 0; }
  :root[data-theme='light'] .hero--img-left .hero__inner { grid-template-columns: 1fr 1.2fr; }
}
:root[data-theme='dark'] { color-scheme: dark; }

.theme-toggle {
  display: grid; place-items: center;
  width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--line); background: transparent; color: var(--text-2);
  transition: color .2s, border-color .2s, transform .3s;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); transform: rotate(20deg); }
/* Khi đổi theme: mọi phần chuyển màu cùng lúc (không có khoảnh khắc lệch màu) */
.theme-switching, .theme-switching *, .theme-switching *::before, .theme-switching *::after {
  transition: background-color .35s ease, color .35s ease, border-color .35s ease, fill .35s ease !important;
}
/* svg dạng block để không bị chừa khoảng trống baseline (icon lệch lên) */
.theme-toggle span { display: grid; place-items: center; }
.theme-toggle svg { display: block; }
.theme-toggle .i-sun { display: none; }
:root[data-theme='dark'] .theme-toggle .i-sun { display: grid; }
:root[data-theme='dark'] .theme-toggle .i-moon { display: none; }
.header__tools { display: flex; align-items: center; gap: 10px; order: 2; margin-left: 16px; }
.nav { margin-left: auto; }

/* ===== Hiệu ứng xuất hiện khi cuộn ===== */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s ease, transform .8s cubic-bezier(.2, .7, .2, 1); }
.js .reveal.is-in { opacity: 1; transform: none; }
.is-preview .reveal { opacity: 1 !important; transform: none !important; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .bubble, .card.is-filter-in { animation: none; }
}

/* ===== Responsive ===== */
@media (max-width: 1100px) {
  .nav { gap: 26px; }
}

/* Menu dạng nút ☰ cho tablet & điện thoại */
@media (max-width: 960px) {
  .nav-toggle {
    display: grid; gap: 6px; place-content: center;
    width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 50%; background: transparent;
  }
  .nav-toggle span { display: block; width: 18px; height: 1.5px; background: var(--text); transition: transform .25s; }
  .nav-toggle[aria-expanded='true'] span:first-child { transform: translateY(3.75px) rotate(45deg); }
  .nav-toggle[aria-expanded='true'] span:last-child { transform: translateY(-3.75px) rotate(-45deg); }
  .nav {
    position: fixed; inset: 72px 0 auto; flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px var(--gutter) 20px; background: var(--bg); border-bottom: 1px solid var(--line);
    transform: translateY(-8px); opacity: 0; visibility: hidden; transition: all .25s;
  }
  .nav.is-open { transform: none; opacity: 1; visibility: visible; }
  .nav > a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
  .nav .btn { margin-top: 16px; height: 46px; }
}

@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(min(var(--cols, 3), 2), minmax(0, 1fr)); }
  .services__inner { flex-direction: column; align-items: stretch; text-align: center; }
  .services__intro { max-width: none; }
  .services__list { grid-template-columns: repeat(min(var(--count), 4), minmax(0, 1fr)); }
  .about__inner { gap: 36px; }
}

@media (max-width: 760px) {
  section { padding: 56px 0; }
  :root { --gutter: 16px; }


  .hero { padding-top: 8px; }
  .hero__inner { grid-template-columns: 1fr; min-height: 0; }
  .hero__media, .hero--img-left .hero__media { grid-column: 1; grid-row: 1; margin: 0; height: 380px; opacity: .55; }
  .hero__text, .hero--img-left .hero__text { grid-column: 1; grid-row: 1; text-align: left; padding: 0 8px; }
  .hero--img-left .hero__line, .hero--img-left .hero__actions { padding-right: 0; }
  .hero--img-left .hero__line--0 { padding-left: 1.05em; }
  .hero--img-left .hero__line--2 { padding-left: 1.2em; }
  .hero--img-left .hero__actions { justify-content: flex-start; padding-left: 1.2em; }

  /* Giao diện sáng: ảnh nằm dưới chữ thay vì làm nền mờ phía sau */
  :root[data-theme='light'] .hero__media { grid-row: 2; opacity: 1; height: 280px; margin-top: 28px; }
  :root[data-theme='light'] .hero__text { padding: 0; }

  .services__list { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 28px; }

  .about__inner { grid-template-columns: 1fr; }
  .about--img-right .about__media { order: 0; }

  .grid { grid-template-columns: repeat(min(var(--cols, 3), 2), minmax(0, 1fr)); gap: 10px; }
  .card__meta strong { font-size: 13px; }
  .card__meta small { display: none; }

  .reviews__stage { height: 320px; }
  .bubble { scale: .75; }

  .footer__inner { flex-direction: column; text-align: center; }
}

@media (max-width: 440px) {
  .hero__title, .hero__actions { font-size: 10vw; }
  .grid { grid-template-columns: 1fr; }
  .card__meta small { display: block; }
}

/* In trang: hiện toàn bộ nội dung */
@media print {
  .reveal { opacity: 1 !important; transform: none !important; }
  .header, .lightbox, .theme-toggle { display: none !important; }
}