/* ============================================================
   Eventus Production — Public Theme (light editorial)
   Pure CSS. No framework dependency.
   ============================================================ */

/* ---------- Design tokens ---------- */
:root {
  /* Colors */
  --bg:          #ffffff;
  --bg-soft:     #f6f6f4;   /* warm ivory */
  --bg-dark:     #141414;   /* footer / lightbox */
  --text:        #141414;
  --text-soft:   #6b6b6b;
  --text-invert: #ffffff;
  --border:      #ececec;
  --accent:      #fa981c;   /* Eventus orange — used sparingly */
  --accent-dark: #e08714;

  /* Typography */
  --font-head: "Space Grotesk", "Be Vietnam Pro", system-ui, sans-serif;
  --font-body: "Be Vietnam Pro", "Inter", system-ui, -apple-system, sans-serif;

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 128px;

  /* Radius / shadow */
  --radius:    14px;
  --radius-sm: 10px;
  --shadow:    0 8px 30px rgba(20, 20, 20, 0.08);
  --shadow-lg: 0 18px 50px rgba(20, 20, 20, 0.14);

  /* Layout */
  --container: 1200px;
  --nav-h: 72px;

  --transition: 0.25s ease;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-3);
}
h1 { font-size: clamp(2.2rem, 5vw, 4rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: 1.25rem; }
p  { margin: 0 0 var(--space-3); }

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-4);
}
.section { padding: var(--space-7) 0; }
.section--soft { background: var(--bg-soft); }
.section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}
.eyebrow {
  font-family: var(--font-head);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-2);
}
.text-soft { color: var(--text-soft); }
.center { text-align: center; }

/* Accent rule under headings */
.rule {
  width: 56px;
  height: 3px;
  background: var(--accent);
  border: 0;
  margin: var(--space-3) 0 0;
}
.center .rule { margin-left: auto; margin-right: auto; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.85em 1.6em;
  border: 1px solid var(--text);
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  background: transparent;
  color: var(--text);
}
.btn:hover { background: var(--text); color: var(--text-invert); }
.btn--accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn--accent:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; }
.btn--ghost-invert { border-color: rgba(255,255,255,.5); color: #fff; }
.btn--ghost-invert:hover { background: #fff; color: var(--text); }

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  z-index: 100;
  background: transparent;
  transition: var(--transition);
}
.nav.is-stuck {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}
.nav__brand {
  display: inline-flex;
  align-items: center;
}
.nav__logo {
  height: 54px;
  width: auto;
  display: block;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.nav__links a {
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: var(--space-1) 0;
  transition: var(--transition);
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav__links a:hover::after,
.nav__links a.is-active::after { width: 100%; }
.nav__actions { display: flex; align-items: center; gap: var(--space-3); }
.nav__icon-btn {
  background: none; border: 0; padding: var(--space-1);
  display: inline-flex; color: var(--text);
}
.nav__toggle { display: none; background: none; border: 0; }
.nav__toggle span {
  display: block; width: 24px; height: 2px; background: var(--text);
  margin: 5px 0; transition: var(--transition);
}

/* Search field in nav */
.nav__search {
  display: none;
  position: absolute;
  top: var(--nav-h); right: var(--space-4);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  padding: var(--space-2);
}
.nav__search.is-open { display: block; }
.nav__search input {
  border: 0; outline: none; padding: var(--space-2) var(--space-3);
  font-size: 0.95rem; width: 240px;
}

/* ---------- Hero ---------- */
.hero {
  padding: calc(var(--nav-h) + var(--space-7)) 0 var(--space-7);
  background: var(--bg-soft);
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-6);
  align-items: center;
}
.hero__title { margin-bottom: var(--space-3); }
.hero__sub { font-size: 1.1rem; color: var(--text-soft); max-width: 32ch; }
.hero__actions { display: flex; gap: var(--space-3); margin-top: var(--space-5); flex-wrap: wrap; }
.hero__media {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  box-shadow: var(--shadow-lg);
}
.hero__media img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- Services strip ---------- */
.services {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
}
.services__item {
  font-family: var(--font-head);
  font-weight: 600;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
}

/* ---------- Intro / about ---------- */
.intro__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}
.intro__text { font-size: 1.05rem; color: var(--text-soft); }
.intro__text strong, .intro__lead { color: var(--text); font-weight: 600; }

/* ---------- Category block + video/album grid ---------- */
.cat-block { margin-bottom: var(--space-7); }
.cat-block__title {
  display: flex; align-items: center; gap: var(--space-3);
  margin-bottom: var(--space-5);
}
.cat-block__title h2 { margin: 0; }
.cat-block__title::after {
  content: ""; flex: 1; height: 1px; background: var(--border);
}
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
.grid--albums { grid-template-columns: repeat(3, 1fr); }
.is-hidden { display: none; }

/* Video / album card */
.card { display: flex; flex-direction: column; }
.card__media {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--bg-soft);
  box-shadow: var(--shadow);
}
.card--album .card__media { aspect-ratio: 3 / 2; }
.card__media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s ease;
}
.card:hover .card__media img { transform: scale(1.06); }
.card__media::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0) 25%, rgba(0,0,0,0.45) 60%, rgba(0,0,0,0.85));
  opacity: 0; transition: var(--transition);
}
.card:hover .card__media::after { opacity: 1; }
.card__play {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  width: 58px; height: 58px;
  background: rgba(255,255,255,0.92);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: var(--transition);
  z-index: 2;
}
.card:hover .card__play { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.card__play svg { width: 22px; height: 22px; fill: var(--text); margin-left: 3px; }

/* Hover overlay info (đáy thumbnail) */
.card__overlay {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: var(--space-3);
  z-index: 2;
  color: #fff;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--transition), transform var(--transition);
  pointer-events: none;
}
.card:hover .card__overlay { opacity: 1; transform: translateY(0); }
.card__overlay-title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.3;
  margin-bottom: 4px;
}
.card__overlay-meta {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.85);
  line-height: 1.4;
}
.card__name {
  margin-top: var(--space-3);
  font-weight: 500;
  font-size: 0.98rem;
  cursor: pointer;
}
.card--album .card__name { text-align: center; }

.loadmore { text-align: center; margin-top: var(--space-5); }

/* ---------- Category nav (pills) ---------- */
.cat-nav {
  display: flex; flex-wrap: wrap; gap: var(--space-2);
  justify-content: center;
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-6);
}
.cat-nav__item { position: relative; }
.cat-nav__item > a {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  font-weight: 500;
  border-radius: 999px;
  transition: var(--transition);
}
.cat-nav__item > a:hover,
.cat-nav__item > a.is-active { background: var(--text); color: #fff; }
.cat-nav__sub {
  position: absolute; top: 100%; left: 0;
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius-sm); box-shadow: var(--shadow);
  padding: var(--space-2); min-width: 180px;
  display: none; z-index: 20;
}
.cat-nav__item:hover .cat-nav__sub { display: block; }
.cat-nav__sub a { display: block; padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); }
.cat-nav__sub a:hover { background: var(--bg-soft); }

/* ---------- Clients strip ---------- */
.clients { background: var(--bg-soft); }
.clients__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-4);
  align-items: center;
}
.clients__grid img {
  width: 100%; height: auto;
  filter: grayscale(1); opacity: 0.6;
  transition: var(--transition);
}
.clients__grid img:hover { filter: grayscale(0); opacity: 1; }

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-dark);
  color: var(--text-invert);
  padding: var(--space-6) 0 var(--space-5);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--space-5);
  align-items: start;
  margin-bottom: var(--space-6);
}
.footer__brand { display: inline-block; margin-bottom: var(--space-1); line-height: 1.2; }
.footer__brand img { height: 48px; width: auto; display: block; }
.footer__tagsub { color: #888; font-size: 0.82rem; max-width: 36ch; margin-top: var(--space-2); }
.footer h4 { font-size: 0.85rem; letter-spacing: 0.12em; text-transform: uppercase; color: #999; }
.footer a { color: #ccc; transition: var(--transition); }
.footer a:hover { color: var(--accent); }
.footer__contact li { margin-bottom: var(--space-2); }
.footer__social { display: flex; gap: var(--space-3); margin-top: var(--space-3); }
.footer__social img { width: 28px; height: 28px; border-radius: 6px; }
.footer__grid > div:last-child { justify-self: end; }
.footer__company {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 0.82rem;
  line-height: 1.5;
  color: #999;
}
.footer__company strong { color: #aaa; font-weight: 600; }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-4);
  color: #888; font-size: 0.85rem; text-align: left;
}

/* ---------- FAB contact (single Zalo button) ---------- */
.fab--single {
  position: fixed;
  right: 20px; bottom: 28px;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 18px 7px 7px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: var(--shadow-lg);
  color: var(--text);
  transition: transform var(--transition), box-shadow var(--transition);
}
.fab--single:hover { transform: translateY(-2px); box-shadow: 0 22px 55px rgba(20,20,20,0.20); }
.fab__avatar {
  position: relative;
  width: 42px; height: 42px;
  border-radius: 50%;
  flex-shrink: 0;
}
/* green online dot */
.fab--single::after {
  content: "";
  position: absolute;
  left: 38px; top: 8px;
  width: 11px; height: 11px;
  background: #22c55e;
  border: 2px solid #fff;
  border-radius: 50%;
}
.fab__label { display: flex; flex-direction: column; line-height: 1.25; }
.fab__label small { font-size: 0.7rem; color: var(--text-soft); }
.fab__label strong { font-size: 0.92rem; font-family: var(--font-head); }
@media (max-width: 560px) {
  .fab--single { padding: 7px; }
  .fab__label { display: none; }
  .fab--single::after { left: 34px; top: 5px; }
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(10, 10, 10, 0.92);
  display: none; align-items: center; justify-content: center;
  padding: var(--space-4);
}
.lightbox.is-open { display: flex; }
.lightbox__close {
  position: absolute; top: 20px; right: 24px;
  background: none; border: 0; color: #fff; font-size: 2rem; line-height: 1;
}
.lightbox__body { width: min(900px, 100%); }
.lightbox__title { color: #fff; text-align: center; margin-bottom: var(--space-3); font-family: var(--font-head); }
.lightbox__frame {
  position: relative; width: 100%; aspect-ratio: 16 / 9;
  border-radius: var(--radius-sm); overflow: hidden;
}
.lightbox__frame iframe { width: 100%; height: 100%; border: 0; }
.lightbox__img { max-width: 100%; max-height: 85vh; margin: 0 auto; border-radius: var(--radius-sm); }

/* ---------- Album gallery ---------- */
.gallery {
  columns: 3;
  column-gap: var(--space-4);
}
.gallery img {
  width: 100%; margin-bottom: var(--space-4);
  border-radius: var(--radius-sm); cursor: pointer;
  break-inside: avoid;
  transition: var(--transition);
}
.gallery img:hover { opacity: 0.9; }
.page-head {
  padding: calc(var(--nav-h) + var(--space-6)) 0 var(--space-5);
  text-align: center;
}

/* ---------- Tabs (Video / Ảnh) ---------- */
.tabs {
  position: sticky;
  top: var(--nav-h);
  z-index: 80;
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.tab {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.6em 1.6em;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  color: var(--text-soft);
  transition: var(--transition);
}
.tab:hover { color: var(--text); }
.tab.is-active { background: var(--text); color: #fff; border-color: var(--text); }
.tab-panel { display: none; }
.tab-panel.is-active { display: block; }
.tab-panel { padding-top: var(--space-6); }

/* ---------- About strip (compact, end of page) ---------- */
.about-strip { background: var(--bg-soft); padding: var(--space-6) 0; }
.about-strip__grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--space-6);
  align-items: start;
}
.about-strip__text { color: var(--text-soft); font-size: 0.98rem; }
.about-strip__text h2 { color: var(--text); font-size: 1.5rem; margin-bottom: var(--space-2); }
.about-strip__clients {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-3);
  align-items: center;
}
.about-strip__clients img {
  width: 100%; height: auto;
  max-height: 40px; object-fit: contain;
  filter: grayscale(1); opacity: 0.55;
  transition: var(--transition);
}
.about-strip__clients img:hover { filter: grayscale(0); opacity: 1; }

/* ---------- Masthead (home) ---------- */
.masthead {
  padding: calc(var(--nav-h) + var(--space-4)) 0 var(--space-5);
  background: var(--bg-soft);
}
.masthead__title {
  font-size: clamp(1.6rem, 3.6vw, 3rem);
  white-space: nowrap;
}
.masthead__sub {
  font-size: 1.05rem;
  color: var(--text-soft);
  white-space: nowrap;
  margin-top: calc(-1 * var(--space-2));
}
.masthead__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
  margin-top: var(--space-4);
}
.masthead__stats li {
  font-size: 0.95rem;
  color: var(--text-soft);
}
.masthead__stats strong {
  font-family: var(--font-head);
  font-size: 1.35rem;
  color: var(--text);
  margin-right: var(--space-1);
}

/* ---------- Category filter menu ---------- */
.catmenu {
  position: sticky;
  top: var(--nav-h);
  z-index: 80;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.catmenu__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3) var(--space-2);
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}
.catmenu__item { position: relative; }
.catmenu__btn {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.55em 1.1em;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  color: var(--text-soft);
  transition: var(--transition);
}
.catmenu__btn:hover { color: var(--text); border-color: var(--text); }
.catmenu__btn.is-active { background: var(--text); color: #fff; border-color: var(--text); }
.catmenu__sub {
  position: absolute; top: calc(100% + 6px); left: 0;
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius-sm); box-shadow: var(--shadow);
  padding: var(--space-2); min-width: 190px;
  display: none; z-index: 20;
}
.catmenu__item:hover .catmenu__sub { display: block; }
.catmenu__sub a { display: block; padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); font-size: 0.92rem; }
.catmenu__sub a:hover { background: var(--bg-soft); }

/* Static variant (photos page): not sticky, transparent */
.catmenu--static {
  position: static;
  background: transparent;
  backdrop-filter: none;
  border-bottom: 0;
  margin-bottom: var(--space-5);
}
.catmenu--static .catmenu__inner { padding-top: 0; padding-bottom: 0; }

/* ---------- Category panel + pager ---------- */
.section--tight { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.cat-panel.is-hidden { display: none; }
.pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-5);
}
.pager--top { margin-top: 0; margin-bottom: var(--space-5); }
.pager__btn {
  width: 44px; height: 44px;
  border: 1px solid var(--text);
  border-radius: 50%;
  background: transparent;
  color: var(--text);
  font-size: 1.1rem; line-height: 1;
  display: inline-flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.pager__btn:hover:not(:disabled) { background: var(--text); color: #fff; }
.pager__btn:disabled { opacity: 0.3; cursor: not-allowed; }
.pager__status {
  font-family: var(--font-head);
  font-weight: 600;
  min-width: 56px;
  text-align: center;
}

/* ---------- Responsive ---------- */
@media (max-width: 992px) {
  .hero__grid, .intro__grid { grid-template-columns: 1fr; }
  .about-strip__grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .about-strip__clients { grid-template-columns: repeat(4, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .clients__grid { grid-template-columns: repeat(4, 1fr); }
  .grid, .grid--albums { grid-template-columns: repeat(2, 1fr); }
  .gallery { columns: 2; }
}
@media (max-width: 768px) {
  .nav__links {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; align-items: flex-start;
    background: #fff; border-bottom: 1px solid var(--border);
    padding: var(--space-4); gap: var(--space-3);
    display: none;
  }
  .nav__links.is-open { display: flex; }
  .nav__toggle { display: block; }
  .section { padding: var(--space-6) 0; }
  .clients__grid { grid-template-columns: repeat(3, 1fr); }
  .masthead__title, .masthead__sub { white-space: normal; }
  /* mobile: không có hover → overlay luôn hiện */
  .card__overlay { opacity: 1; transform: none; }
  .card__media::after { opacity: 1; }
}
@media (max-width: 560px) {
  .grid, .grid--albums { grid-template-columns: 1fr; }
  .gallery { columns: 1; }
  .clients__grid { grid-template-columns: repeat(2, 1fr); }
  .about-strip__clients { grid-template-columns: repeat(3, 1fr); }
  .footer__grid { grid-template-columns: 1fr; gap: var(--space-4); }
}