/* =========================================================
   Constants Clone — style.css
   ========================================================= */

/* --- Reset & Base ---------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: #ffffff;
  color: #111111;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
}

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

/* --- Layout ---------------------------------------------- */
.container {
  width: 100%;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* --- Buttons --------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  font-weight: 600;
  border-radius: 9999px;
  cursor: pointer;
  border: none;
  transition: background-color 0.18s ease, transform 0.12s ease, box-shadow 0.18s ease;
  white-space: nowrap;
}

.btn--primary {
  background-color: #111111;
  color: #ffffff;
}

.btn--primary:hover {
  background-color: #2a2a2a;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18);
  transform: translateY(-1px);
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn--sm {
  font-size: 0.875rem;
  padding: 8px 20px;
}

.btn--lg {
  font-size: 1rem;
  padding: 14px 32px;
}

/* --- Logo ------------------------------------------------ */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 9px;
}

.logo__icon {
  flex-shrink: 0;
}

.logo__text {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #111111;
}

/* --- Header --------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.07);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

/* --- Hero ----------------------------------------------- */
.hero {
  padding-top: 88px;
  padding-bottom: 64px;
  text-align: center;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.hero__headline {
  font-size: clamp(2.25rem, 6vw, 3.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: #0a0a0a;
  max-width: 720px;
}

.hero__sub {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 400;
  color: #555555;
  max-width: 520px;
  line-height: 1.55;
}

.br-desktop {
  display: none;
}

@media (min-width: 640px) {
  .br-desktop {
    display: block;
  }
}

/* --- Video Wrapper -------------------------------------- */
.video-wrapper {
  width: 100%;
  max-width: 820px;
  margin-top: 16px;
  border-radius: 18px;
  overflow: hidden;
  box-shadow:
    0 0 0 1px rgba(0,0,0,0.07),
    0 8px 32px rgba(0,0,0,0.08),
    0 32px 72px rgba(0,0,0,0.06);
}

.video-placeholder {
  width: 100%;
  aspect-ratio: 16 / 10;
  background: linear-gradient(145deg, #f3f4f6 0%, #e9eaec 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-placeholder__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.video-placeholder__play {
  opacity: 0.7;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.video-wrapper:hover .video-placeholder__play {
  opacity: 1;
  transform: scale(1.08);
}

.video-placeholder__label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: #888888;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* --- Use Case Tags -------------------------------------- */
.usecases {
  padding-bottom: 80px;
}

.usecases__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 7px 18px;
  border-radius: 9999px;
  background-color: #f3f4f6;
  border: 1px solid rgba(0, 0, 0, 0.08);
  font-size: 0.875rem;
  font-weight: 500;
  color: #444444;
  letter-spacing: 0.01em;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  cursor: default;
}

.tag:hover {
  background-color: #eaedf0;
  border-color: rgba(0, 0, 0, 0.14);
}

/* --- Footer -------------------------------------------- */
.footer {
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  padding: 28px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer__left {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer__copy {
  font-size: 0.8125rem;
  color: #999999;
}

.footer__links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.footer__link {
  font-size: 0.8125rem;
  color: #777777;
  transition: color 0.15s ease;
}

.footer__link:hover {
  color: #111111;
}

/* --- Responsive ---------------------------------------- */
@media (max-width: 540px) {
  .hero {
    padding-top: 60px;
    padding-bottom: 48px;
  }

  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer__links {
    gap: 16px;
  }
}