/* ==========================================================================
   HaY Systems — design tokens & component styles
   Buildless, no framework: CSS custom properties + modern Grid/Flexbox.
   ========================================================================== */

:root {
  /* Color tokens */
  --color-ink: #0f172a;
  --color-ink-soft: #475569;
  --color-paper: #ffffff;
  --color-mist: #f4f6fb;
  --color-mist-border: #e2e8f0;

  --color-brand: #2454ff;
  --color-brand-dark: #101a3d;
  --color-brand-darker: #0b1330;

  --color-success: #0da96b;
  --color-success-dark: #087a4d;
  --color-info: #0ea5e9;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;

  --color-on-dark: #f8fafc;
  --color-on-dark-soft: #a8b3cc;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --space-6: 4rem;
  --space-7: 6rem;

  /* Type scale (fluid) */
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --text-sm: clamp(0.875rem, 0.85rem + 0.1vw, 0.95rem);
  --text-base: clamp(1rem, 0.97rem + 0.15vw, 1.125rem);
  --text-lead: clamp(1.1rem, 1.05rem + 0.3vw, 1.3rem);
  --text-h2: clamp(1.6rem, 1.4rem + 1.2vw, 2.5rem);
  --text-h1: clamp(2.1rem, 1.7rem + 2.2vw, 3.5rem);

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.12);
  --shadow-lg: 0 20px 48px rgba(15, 23, 42, 0.18);

  --container-max: 1140px;
  --container-max-wide: 1320px;
  --header-height: 72px;
}

/* ---------------------------------------------------------------- reset */

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-ink);
  background: var(--color-paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, video { max-width: 100%; height: auto; display: block; }

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4, h5, h6 { margin: 0 0 var(--space-3); font-weight: 700; line-height: 1.15; }

p { margin: 0 0 var(--space-3); }

ul { padding-left: 0; list-style: none; margin: 0; }

button { font: inherit; cursor: pointer; }

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.container--wide { max-width: var(--container-max-wide); }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ------------------------------------------------------------ typography */

.display-1 { font-size: var(--text-h1); }
.display-2 { font-size: var(--text-h2); }

.lead {
  font-size: var(--text-lead);
  color: inherit;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.85;
  margin-bottom: var(--space-2);
}

.text-center { text-align: center; }
.text-success { color: var(--color-success); }
.text-info { color: var(--color-info); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }
.text-brand { color: var(--color-brand); }

/* ---------------------------------------------------------------- button */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  font-weight: 700;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--color-brand);
  color: var(--color-on-dark);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { box-shadow: var(--shadow-md); }

.btn-outline {
  background: transparent;
  border-color: currentColor;
  color: inherit;
}

.btn-success {
  background: var(--color-success-dark);
  color: var(--color-on-dark);
  box-shadow: var(--shadow-sm);
}
.btn-success:hover { box-shadow: var(--shadow-md); }

.btn-icon {
  flex: 0 0 auto;
  width: 3rem;
  padding-left: 0;
  padding-right: 0;
  background: var(--color-success);
  color: var(--color-on-dark);
  font-size: 1.2rem;
  box-shadow: var(--shadow-sm);
}
.btn-icon:hover { box-shadow: var(--shadow-md); }

.btn-block { display: flex; width: 100%; }

/* ----------------------------------------------------------------- header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(11, 19, 48, 0.92);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header__bar {
  min-height: var(--header-height);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0 var(--space-3);
}

.site-header__brand { order: 1; }
.site-header__brand img { height: 36px; width: auto; }

.site-header__icons {
  order: 2;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: auto;
}

.site-header__icons a {
  color: var(--color-on-dark-soft);
  font-size: 1.15rem;
  transition: color 0.15s ease;
}
.site-header__icons a:hover { color: var(--color-on-dark); }

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  color: var(--color-on-dark);
  margin-left: var(--space-2);
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  position: relative;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle__bars::before { position: absolute; top: -6px; }
.nav-toggle__bars::after { position: absolute; top: 6px; }

.site-nav {
  order: 3;
  flex: 1 1 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
  width: 100%;
}

.site-nav.is-open { max-height: 720px; }

.site-nav__group { border-top: 1px solid rgba(255, 255, 255, 0.08); }

.site-nav__toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  border: none;
  color: var(--color-on-dark);
  padding: var(--space-3) 0;
  font-weight: 600;
  font-size: var(--text-base);
}

.site-nav__toggle .chevron { transition: transform 0.2s ease; }
.site-nav__group.is-open .chevron { transform: rotate(180deg); }

.site-nav__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.2s ease;
}
.site-nav__group.is-open .site-nav__panel { grid-template-rows: 1fr; }
.site-nav__panel > ul { overflow: hidden; }

.site-nav__panel a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) 0 var(--space-2) var(--space-3);
  color: var(--color-on-dark-soft);
  font-size: var(--text-sm);
}
.site-nav__panel a:hover { color: var(--color-on-dark); }

.site-nav__link {
  display: block;
  padding: var(--space-3) 0;
  color: var(--color-on-dark);
  font-weight: 600;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

@media (min-width: 992px) {
  .nav-toggle { display: none; }

  .site-nav {
    order: 2;
    flex: 1 1 auto;
    flex-direction: row;
    align-items: center;
    max-height: none;
    overflow: visible;
    gap: var(--space-5);
    width: auto;
  }

  .site-header__icons { order: 3; }

  .site-nav__group { position: relative; border-top: none; }

  .site-nav__toggle { width: auto; padding: 0; gap: var(--space-1); }

  .site-nav__panel {
    display: block;
    position: absolute;
    top: calc(100% + var(--space-3));
    left: 50%;
    transform: translateX(-50%);
    min-width: 260px;
    background: var(--color-brand-darker);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--space-2);
    grid-template-rows: 1fr;
    height: 0;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease;
  }

  .site-nav__group.is-open .site-nav__panel {
    height: auto;
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav__panel a { padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); }
  .site-nav__panel a:hover { background: rgba(255, 255, 255, 0.06); }

  .site-nav__link { border-top: none; padding: 0; }
}

/* ----------------------------------------------------------------- hero */

.hero {
  position: relative;
  overflow: hidden;
  background: var(--color-mist);
  padding: var(--space-6) var(--space-4);
  text-align: center;
}

.hero__inner { max-width: 720px; margin-inline: auto; position: relative; z-index: 1; }

.hero__logo { max-width: 260px; margin: 0 auto var(--space-4); }

.hero__devices {
  position: absolute;
  inset: 0;
  pointer-events: none;
  display: none;
}

@media (min-width: 768px) {
  .hero__devices { display: block; }

  .hero__device {
    position: absolute;
    width: 280px;
    height: 500px;
    border-radius: var(--radius-lg);
    background: var(--color-brand-darker);
    box-shadow: var(--shadow-lg);
    transform: rotate(24deg);
    opacity: 0.12;
  }
  .hero__device--1 { right: 6%; bottom: -28%; }
  .hero__device--2 { left: 4%; top: -22%; background: var(--color-mist-border); }
}

/* ------------------------------------------------------------ feature panel */

.panels { display: grid; gap: var(--space-2); }

.panel-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
}

@media (min-width: 768px) {
  .panel-row { grid-template-columns: 1fr 1fr; }
}

.feature-panel {
  position: relative;
  overflow: hidden;
  padding: var(--space-6) var(--space-4);
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
  min-height: 320px;
}

.feature-panel__body { max-width: 600px; margin-inline: auto; position: relative; z-index: 1; }

.feature-panel__icon { font-size: 1.6rem; margin-right: var(--space-2); }

.feature-panel__media {
  margin-top: var(--space-4);
  max-width: 80%;
  margin-inline: auto;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  box-shadow: var(--shadow-md);
  background: var(--color-paper);
  overflow: hidden;
}

.feature-panel__media img { width: 100%; }

.feature-panel--light { background: var(--color-mist); color: var(--color-ink); }
.feature-panel--dark { background: var(--color-brand-darker); color: var(--color-on-dark); }
.feature-panel--brand { background: var(--color-brand); color: var(--color-on-dark); }
.feature-panel--success { background: var(--color-success-dark); color: var(--color-on-dark); }

/* ------------------------------------------------------------------- list */

.check-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-1) 0;
  text-align: left;
}
.check-list i { color: var(--color-success); margin-top: 0.3em; }

.feature-list li {
  padding: var(--space-2) 0;
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}
.feature-list li:last-child { border-bottom: none; }

/* --------------------------------------------------------------- pricing */

.pricing { padding: var(--space-6) 0; }

.pricing__header { text-align: center; margin-bottom: var(--space-5); }

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(var(--tier-count, 4), 1fr);
  gap: var(--space-3);
}

@media (max-width: 991px) {
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 599px) {
  .pricing-grid { grid-template-columns: 1fr; }
}

.pricing-card {
  position: relative;
  overflow: hidden;
  background: var(--color-mist);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.pricing-card--highlight {
  background: var(--color-brand);
  color: var(--color-on-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-8px);
}

.pricing-card__name {
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: var(--text-sm);
  font-weight: 700;
  opacity: 0.75;
}

.pricing-card__price { text-align: center; font-size: 1.5rem; font-weight: 700; margin-bottom: var(--space-3); }
.pricing-card__price .period { font-size: var(--text-sm); font-weight: 400; opacity: 0.7; }

.pricing-card > .pricing-card__features { flex: 1; margin-bottom: var(--space-3); }
.pricing-card__features li {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-1) 0;
  font-size: var(--text-sm);
}
.pricing-card__features i { color: var(--color-success); margin-top: 0.2em; }
.pricing-card--highlight .pricing-card__features i { color: var(--color-on-dark); }

.pricing-card__extra {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.25s ease;
}
.pricing-card__extra > ul { overflow: hidden; }
.pricing-card.is-expanded .pricing-card__extra { grid-template-rows: 1fr; }

.pricing-card__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  background: transparent;
  border: none;
  color: inherit;
  opacity: 0.75;
  font-size: var(--text-sm);
  font-weight: 700;
  padding: var(--space-2) 0;
  margin-bottom: var(--space-2);
}
.pricing-card__toggle:hover { opacity: 1; }
.pricing-card__toggle i { transition: transform 0.2s ease; }
.pricing-card.is-expanded .pricing-card__toggle i { transform: rotate(180deg); }

.pricing-card__actions { display: flex; gap: var(--space-2); }
.pricing-card__actions .btn-success { flex: 1; }

.ribbon {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 5.5rem;
  height: 5.5rem;
  overflow: hidden;
  z-index: 2;
}

.ribbon span {
  position: absolute;
  top: 1.15rem;
  right: -2.35rem;
  display: block;
  width: 8rem;
  padding: 0.3rem 0;
  background: var(--color-success-dark);
  color: var(--color-on-dark);
  font-size: calc(var(--text-sm) * 0.7);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-align: center;
  transform: rotate(45deg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

/* -------------------------------------------------------------- carousel */

.carousel {
  position: relative;
  margin-top: var(--space-4);
}

.carousel__track {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  gap: var(--space-2);
  border-radius: var(--radius-md);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.carousel__track::-webkit-scrollbar { display: none; }

.carousel__slide {
  flex: 0 0 100%;
  scroll-snap-align: center;
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
}

.carousel__caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: var(--space-3);
  background: linear-gradient(0deg, rgba(0,0,0,0.75), transparent);
  color: var(--color-on-dark);
  text-align: left;
}
.carousel__caption h5 { margin-bottom: var(--space-1); }
.carousel__caption p { margin: 0; font-size: var(--text-sm); }

.carousel__controls {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.carousel__btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.06);
  color: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

/* ---------------------------------------------------------------- video */

.video-embed {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
  margin-top: var(--space-4);
}
.video-embed video, .video-embed iframe { width: 100%; height: 100%; object-fit: cover; border: 0; }

/* --------------------------------------------------------------- footer */

.site-footer {
  background: var(--color-brand-darker);
  color: var(--color-on-dark-soft);
  padding: var(--space-6) 0 var(--space-4);
}

.footer-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 1.4fr repeat(4, 1fr); }
}

.footer-grid h5 {
  color: var(--color-on-dark);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-3);
}

.footer-grid a,
.footer-grid span { font-size: var(--text-sm); display: block; padding: var(--space-1) 0; }
.footer-grid a:hover { color: var(--color-on-dark); }

.footer-brand img { height: 32px; margin-bottom: var(--space-2); }
.footer-brand small { display: block; opacity: 0.7; }

/* ------------------------------------------------------------------ misc */

.section-py { padding: var(--space-6) 0; }

@media (max-width: 767px) {
  .feature-panel__media { max-width: 100%; }
}

/* ---------------------------------------------------------------- policy */

.policy { max-width: 760px; margin-inline: auto; }
.policy h2 { margin-top: var(--space-5); font-size: 1.3rem; }
.policy ul { list-style: disc; padding-left: 1.25rem; margin-bottom: var(--space-3); }
.policy li { margin-bottom: var(--space-2); }

/* ------------------------------------------------------------------ apps */

.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-3);
}

.app-card {
  background: var(--color-mist);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  text-align: center;
}

.app-card--brand { background: var(--color-brand); color: var(--color-on-dark); }
.app-card--info { background: var(--color-info); color: var(--color-on-dark); }

.app-card__title { text-transform: uppercase; font-weight: 700; font-size: var(--text-sm); letter-spacing: 0.03em; }
.app-card__desc { min-height: 4.5rem; opacity: 0.9; }
.app-card__image { border-radius: var(--radius-sm); margin: var(--space-3) 0; }
.app-card__image--muted { opacity: 0.5; }