/* ============================================================
   GTK Attendance — Redesigned
   Aesthetic: Architectural minimalism (Peterson Rich Office)
   Font: Inter (Mini Motorways / Helvetica family)
   ============================================================ */

:root {
  --white: #ffffff;
  --off-white: #fafaf8;
  --black: #0d1b2a;
  --primary: #11557b;
  --primary-dark: #0a3d5c;
  --primary-light: #1a6d9e;
  --accent: #f29c12;
  --light-bg: #f4f3f0;
  --border: #e0ddd8;
  --muted: #5a6978;
  --muted-light: #9ab7c2;
  --font: 'Inter', Helvetica, Arial, sans-serif;
  --ease: cubic-bezier(0.165, 0.84, 0.44, 1);
  --transition: 0.6s var(--ease);
  --transition-fast: 0.3s var(--ease);
  --container: 1320px;
  --gutter: clamp(1.5rem, 5vw, 5rem);
  --section-pad: clamp(5rem, 12vw, 10rem);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
  -ms-overflow-style: none;
  scrollbar-width: none;
}
html::-webkit-scrollbar { display: none; }

body {
  font-family: var(--font);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--black);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { border: none; background: none; cursor: pointer; font-family: inherit; color: inherit; }

::selection { background: var(--primary); color: var(--white); }
*:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

h1, h2, h3, h4, h5, h6 {
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--black);
}
h1 { font-size: clamp(3rem, 7vw, 5.5rem); }
h2 { font-size: clamp(2rem, 4.5vw, 3.25rem); }
h3 { font-size: clamp(1.3rem, 2vw, 1.625rem); font-weight: 400; }
p { color: var(--muted); line-height: 1.7; }

.label {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  display: block;
  margin-bottom: 1.25rem;
}
.label--accent { color: var(--accent); }
.accent { color: var(--accent); }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}
.section { padding-top: clamp(4rem, 10vw, 8rem); padding-bottom: clamp(4rem, 10vw, 8rem); }
.section--dark { background: var(--primary); color: var(--white); }
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--white); }
.section--dark .label { color: var(--muted-light); }
.section--light { background: var(--light-bg); }
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 6vw, 6rem);
  align-items: center;
}

/* Header */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.25rem 0;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition-fast), padding var(--transition-fast), box-shadow var(--transition-fast);
}
.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 0.875rem 0;
  box-shadow: 0 1px 0 rgba(0,0,0,0.06);
}
.header__inner { display: flex; align-items: center; justify-content: space-between; }
.header__menu-trigger {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--black);
  transition: color var(--transition-fast);
  position: relative;
}
.header__menu-trigger::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--black);
  transition: width var(--transition-fast);
}
.header__menu-trigger:hover::after { width: 100%; }

.header__logo img {
  height: 2.25rem;
  width: auto;
}
.header__cta {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--black);
  transition: color var(--transition-fast);
  position: relative;
}
.header__cta::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--black);
  transition: width var(--transition-fast);
}
.header__cta:hover::after { width: 100%; }

/* Nav Overlay */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}
.nav-overlay.is-open { opacity: 1; visibility: visible; }
.nav-overlay__close {
  position: absolute;
  top: 1.75rem;
  right: var(--gutter);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
  opacity: 0.5;
  transition: opacity var(--transition-fast);
}
.nav-overlay__close:hover { opacity: 1; }
.nav-overlay__links { display: flex; flex-direction: column; align-items: center; gap: 0.25rem; }
.nav-overlay__link {
  font-size: clamp(2.25rem, 6vw, 4rem);
  font-weight: 300;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--white);
  opacity: 0.45;
  transition: opacity var(--transition-fast);
  line-height: 1.35;
}
.nav-overlay__link:hover { opacity: 1; }
.nav-overlay__footer {
  position: absolute;
  bottom: 2rem;
  font-size: 0.6875rem;
  color: var(--white);
  opacity: 0.25;
  letter-spacing: 0.08em;
}

/* Hero */
.hero {
  position: relative;
  padding-top: clamp(6rem, 12vw, 10rem);
  padding-bottom: clamp(4rem, 8vw, 6rem);
  min-height: 80vh;
  display: flex;
  align-items: center;
  background: var(--white);
}
.hero__content { max-width: 580px; text-align: left; }
.hero__headline { margin-bottom: 0.75rem; }
.hero__sub {
  font-size: clamp(1rem, 1.3vw, 1.125rem);
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 0.5rem;
  max-width: 460px;
}
.hero__actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 1rem; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 1rem 2.25rem;
  transition: all var(--transition-fast);
  cursor: pointer;
  position: relative;
}
.btn::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  transition: width var(--transition-fast);
}
.btn--primary { background: var(--primary); color: var(--white); border: 1px solid var(--primary); }
.btn--primary::after { background: var(--white); }
.btn--primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn--primary:hover::after { width: 100%; }
.btn--ghost { background: transparent; color: var(--black); border: 1px solid var(--border); }
.btn--ghost::after { background: var(--black); }
.btn--ghost:hover { border-color: var(--black); }
.btn--ghost:hover::after { width: 100%; }
.btn--ghost-light { background: transparent; color: var(--white); border: 1px solid rgba(255,255,255,0.3); }
.btn--ghost-light::after { background: var(--white); }
.btn--ghost-light:hover { border-color: var(--white); }
.btn--ghost-light:hover::after { width: 100%; }
.btn--white { background: var(--white); color: var(--primary); border: 1px solid var(--white); }
.btn--white::after { background: var(--primary); }
.btn--white:hover { background: transparent; color: var(--white); }
.btn--white:hover::after { width: 100%; }
.btn--white-outline { background: transparent; color: var(--white); border: 1px solid rgba(255,255,255,0.25); }
.btn--white-outline::after { background: var(--white); }
.btn--white-outline:hover { border-color: var(--white); }
.btn--white-outline:hover::after { width: 100%; }

/* Promise Image */
.promise-image { position: relative; overflow: hidden; aspect-ratio: 4/3; }
.promise-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 50%, var(--primary) 100%);
  opacity: 0.06;
  pointer-events: none;
}
.promise-image img { width: 100%; height: 100%; object-fit: cover; }

/* Editions */
.editions { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.edition-card {
  background: var(--white);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow var(--transition-fast);
  display: flex;
  flex-direction: column;
}
.edition-card:hover { box-shadow: 0 8px 40px rgba(13,27,42,0.06); }
.edition-card__image { width: 100%; aspect-ratio: 16/9; object-fit: cover; flex-shrink: 0; }
.edition-card__body { padding: 2rem 2rem 2.5rem; display: flex; flex-direction: column; flex: 1; }
.edition-card__tag {
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.edition-card__title { font-size: 1.75rem; font-weight: 300; margin-bottom: 0.25rem; }
.edition-card__subtitle { font-size: 0.8125rem; color: var(--muted); margin-bottom: 1.5rem; }
.edition-card__desc {
  font-size: 0.9375rem;
  color: var(--muted);
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
  line-height: 1.7;
}
.edition-card__desc strong { color: var(--primary); font-weight: 500; }
.edition-card__section-label {
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
}
.capability { display: flex; gap: 1rem; margin-bottom: 1.25rem; }
.capability__num { font-size: 1rem; font-weight: 300; color: var(--accent); flex-shrink: 0; line-height: 1.5; }
.capability__text { font-size: 0.8125rem; color: var(--muted); line-height: 1.6; }
.capability__text strong { display: block; color: var(--black); font-weight: 500; font-size: 0.875rem; margin-bottom: 0.15rem; }
.edition-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.tag {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  padding: 0.375rem 0.875rem;
  border: 1px solid var(--border);
  color: var(--muted);
}
.edition-card__footer { margin-top: auto; }
.edition-card__body .btn { margin-top: 0; }

/* Comparison */
.comparison { display: flex; flex-direction: column; gap: 1.5rem; }
.comparison-block { border: 1px solid var(--border); overflow: hidden; }
.comparison-block--muted { opacity: 0.55; }
.comparison-block__header { padding: 1rem 2rem; border-bottom: 1px solid var(--border); background: var(--light-bg); }
.comparison-block--highlight .comparison-block__header { background: var(--primary); border-color: var(--primary); }
.comparison-block__title {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
}
.comparison-block--highlight .comparison-block__title { color: var(--white); }
.comparison-block__body { padding: 1.5rem 2rem; display: flex; flex-direction: column; gap: 0.75rem; }
.comparison-item { display: flex; align-items: flex-start; gap: 0.75rem; }
.comparison-item__icon { flex-shrink: 0; width: 1rem; height: 1rem; margin-top: 0.2rem; }
.comparison-item__icon--x { color: var(--muted-light); }
.comparison-item__icon--check { color: var(--accent); }
.comparison-item__text { font-size: 0.875rem; color: var(--muted); line-height: 1.5; }
.comparison-item__text strong { color: var(--primary); font-weight: 500; }

/* CTA */
.cta { text-align: center; }
.cta__headline { margin-bottom: 1rem; }
.cta__sub {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  color: rgba(255,255,255,0.6);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}
.cta__actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* Footer */
.footer { padding: 3rem 0; border-top: 1px solid var(--border); background: var(--white); }
.footer__inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.footer__logo {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--black);
}
.footer__links { display: flex; gap: 2rem; }
.footer__link { font-size: 0.8125rem; color: var(--muted); transition: color var(--transition-fast); }
.footer__link:hover { color: var(--primary); }
.footer__copy { font-size: 0.75rem; color: var(--muted); opacity: 0.6; }

/* Fade In */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* Edition Card Objective */
.edition-card__objective {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}
.edition-card__objective-label {
  display: block;
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.edition-card__objective-text {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--primary);
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}
.edition-card__objective-sub {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
}

/* Tabs */
.tabs {
  display: flex;
  justify-content: center;
  gap: 0;
  margin-bottom: 3rem;
  border-bottom: 2px solid var(--border);
}
.tabs__btn {
  padding: 1rem 2rem;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}
.tabs__btn:hover { color: var(--black); }
.tabs__btn--active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.tabs__btn-sub {
  font-weight: 300;
  text-transform: none;
  letter-spacing: 0;
  color: var(--muted);
}
.tabs__btn--active .tabs__btn-sub { color: var(--muted); }
.tabs__panel { display: none; }
.tabs__panel--active { display: block; }

/* Detail Pages */
.detail-page { background: var(--white); }
.detail-hero {
  padding-top: clamp(8rem, 14vw, 12rem);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}
.detail-hero--mtas { background: var(--primary); color: var(--white); }
.detail-hero--mtas h1, .detail-hero--mtas .label { color: var(--white); }
.detail-hero--mrso { background: #b71c1c; color: var(--white); }
.detail-hero--mrso h1, .detail-hero--mrso .label { color: var(--white); }
.detail-hero__title { margin-bottom: 1rem; }
.detail-hero__sub {
  font-size: clamp(1rem, 1.3vw, 1.125rem);
  color: rgba(255,255,255,0.7);
  max-width: 600px;
  line-height: 1.75;
}
.detail-hero__sub strong { color: var(--white); font-weight: 500; }
.detail-back {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  margin-bottom: 2rem;
  transition: color var(--transition-fast);
}
.detail-back:hover { color: var(--white); }

/* Detail Objective */
.detail-objective {
  background: var(--light-bg);
  border: 1px solid var(--border);
  padding: 2rem 2.5rem;
  text-align: center;
  margin-bottom: 4rem;
}
.detail-objective__label {
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.75rem;
}
.detail-objective__flow {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--primary);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}
.detail-objective__sub {
  font-size: 0.875rem;
  color: var(--muted);
}

/* Detail Capabilities */
.detail-capabilities {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.detail-cap {
  background: var(--white);
  border: 1px solid var(--border);
  overflow: hidden;
}
.detail-cap__num {
  font-size: 2rem;
  font-weight: 300;
  color: var(--accent);
  padding: 1.5rem 2rem 0;
}
.detail-cap__header {
  padding: 0.5rem 2rem 1.5rem;
}
.detail-cap__header h3 {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 1rem;
  color: var(--black);
}
.detail-cap__header img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}
.detail-cap__list {
  padding: 0 2rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.detail-cap__list li {
  font-size: 0.8125rem;
  color: var(--muted);
  line-height: 1.5;
  padding-left: 1.25rem;
  position: relative;
}
.detail-cap__list li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 500;
}

/* Shared Banner */
.shared-banner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
  background: var(--white);
  border: 1px solid var(--border);
  padding: 2.5rem;
}
.shared-banner__left h3 { font-size: 1.25rem; font-weight: 300; margin-bottom: 0.75rem; }
.shared-banner__left p { font-size: 0.9375rem; color: var(--muted); line-height: 1.65; }
.shared-banner__right { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.shared-feature {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.5;
}
.shared-feature__icon { color: var(--primary); font-size: 1.125rem; flex-shrink: 0; line-height: 1.3; }

/* Application Grid */
.app-grid { display: grid; gap: 1.5rem; }
.app-grid--3 { grid-template-columns: repeat(3, 1fr); }
.app-grid--4 { grid-template-columns: repeat(4, 1fr); }
.app-card { background: var(--white); border: 1px solid var(--border); overflow: hidden; }
.app-card__header {
  padding: 1rem 1.5rem;
  color: var(--white);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.app-card__body { padding: 1.5rem; display: flex; flex-direction: column; gap: 0.5rem; }
.app-card__bullet {
  font-size: 0.8125rem;
  color: var(--muted);
  line-height: 1.5;
}

/* Delivers Bar */
/* Delivers */
.delivers {
  padding-top: 2rem;
}
.delivers__header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}
.delivers__rule {
  flex: 1;
  height: 1px;
  background: var(--border);
}
.delivers__label {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}
.delivers__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem 3rem;
}
.delivers__item {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--black);
  letter-spacing: 0.01em;
}
.delivers__marker {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  flex-shrink: 0;
}

/* Responsive */
@media (max-width: 1024px) {
  .grid-2 { grid-template-columns: 1fr; gap: 3rem; }
  .editions { grid-template-columns: 1fr; }
  .header__cta { display: none; }
}

@media (max-width: 768px) {
  .hero { min-height: auto; padding-top: 7rem; padding-bottom: 4rem; }
  .hero__actions { flex-direction: column; }
  .btn { width: 100%; text-align: center; }
  .footer__inner { flex-direction: column; align-items: flex-start; }
  .footer__links { flex-direction: column; gap: 0.75rem; }
  .comparison-block__body { padding: 1.25rem 1.5rem; }
  .cta__actions { flex-direction: column; align-items: center; }
  .shared-banner { grid-template-columns: 1fr; }
  .shared-banner__right { grid-template-columns: 1fr; }
  .app-grid--3, .app-grid--4 { grid-template-columns: 1fr; }
  .delivers__grid { grid-template-columns: 1fr; gap: 1.25rem; }
}