/* ==========================================================
   SCI MEDIA — COMPONENTS
   Reusable building blocks every section will use:
   container, buttons, cards, navigation shell.
   ========================================================== */

/* -----------------------------------------------------------
   CONTAINER
   ----------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

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

/* -----------------------------------------------------------
   BUTTON SYSTEM
   Base .btn + modifiers for intent (primary/secondary/ghost)
   and the two surfaces the site uses (on white, on navy).
   ----------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--fs-body);
  font-weight: var(--fw-semibold);
  line-height: 1;
  border-radius: var(--radius-full);
  border: 1.5px solid transparent;
  white-space: nowrap;
  transition: background-color var(--dur-base) var(--ease-standard),
    border-color var(--dur-base) var(--ease-standard),
    color var(--dur-base) var(--ease-standard),
    transform var(--dur-fast) var(--ease-standard),
    box-shadow var(--dur-base) var(--ease-standard);
}

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

/* Primary — orange, the site's one accent CTA color */
.btn--primary {
  background-color: var(--color-orange-500);
  color: var(--color-white);
}

.btn--primary:hover {
  background-color: var(--color-orange-600);
}

/* Secondary — outline, adapts to whichever surface it sits on */
.btn--secondary {
  background-color: transparent;
  border-color: var(--color-navy-600);
  color: var(--color-navy-900);
}

.btn--secondary:hover {
  border-color: var(--color-navy-900);
  background-color: var(--color-surface);
}

[data-surface='navy'] .btn--secondary {
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--color-white);
}

[data-surface='navy'] .btn--secondary:hover {
  border-color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.08);
}

/* Outline — border berwarna, untuk CTA sekunder di background terang */
.btn--outline {
  background-color: var(--color-white);
  border: 1.5px solid var(--color-blue-500);
  color: var(--color-blue-500);
}

.btn--outline:hover {
  background-color: var(--color-blue-500);
  border-color: var(--color-blue-500);
  color: var(--color-white);
}

/* Ghost — text-only, minimal weight, used for tertiary actions */
.btn--ghost {
  background-color: transparent;
  color: var(--color-navy-900);
  padding-inline: var(--space-2);
}

.btn--ghost:hover {
  color: var(--color-blue-500);
}

[data-surface='navy'] .btn--ghost {
  color: var(--color-on-navy-primary);
}

[data-surface='navy'] .btn--ghost:hover {
  color: var(--color-blue-400);
}

/* Sizes */
.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--fs-body-lg);
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--fs-small);
}

/* -----------------------------------------------------------
   CARD SYSTEM
   Base .card + a navy variant for use on dark section
   backgrounds (e.g. product cards inside a navy section).
   ----------------------------------------------------------- */
.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--dur-base) var(--ease-standard),
    transform var(--dur-base) var(--ease-standard);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.card--navy {
  background-color: var(--color-navy-700);
  border-color: var(--color-navy-600);
  color: var(--color-on-navy-primary);
}

.card--navy :is(h1, h2, h3, h4) {
  color: var(--color-white);
}

.card--navy p:not([class]) {
  color: var(--color-on-navy-secondary);
}

.card--flat {
  box-shadow: none;
}

.card--flat:hover {
  box-shadow: var(--shadow-sm);
  transform: none;
}

/* -----------------------------------------------------------
   NAVIGATION SHELL
   ----------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background-color: var(--color-white); /* ← Putih */
  border-bottom: 1px solid var(--color-border); /* Garis tipis agar terpisah dari hero */
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block: var(--space-4);
}

.site-header__logo {
  display: inline-flex;
  align-items: center;
  font-size: var(--fs-body-lg);
  font-weight: var(--fw-extrabold);
  letter-spacing: -0.01em;
  color: var(--color-white);
}

.site-header__logo span {
  color: var(--color-orange-500);
}

/* Brand logo (image with a text fallback) — shared by the header
   and footer. Shows the real logo image by default; if it fails
   to load, swaps to the text wordmark so the brand mark is never
   a broken-image icon. */
.brand-logo__img {
  display: block;
  height: 40px;
  width: auto;
}

.brand-logo__text {
  display: none;
}

.brand-logo.is-missing .brand-logo__img {
  display: none;
}

.brand-logo.is-missing .brand-logo__text {
  display: inline-flex;
  align-items: center;
}

/* Desktop nav links */
.site-nav {
  display: none;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.site-nav__link {
  position: relative;
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  color: var(--color-ink-600); /* ← Diubah dari on-navy-secondary */
  padding-block: var(--space-1);
  transition: color var(--dur-base) var(--ease-standard);
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background-color: var(--color-orange-500);
  transition: width var(--dur-base) var(--ease-standard);
}

.site-nav__link:hover {
  color: var(--color-navy-900); /* ← Diubah dari white */
}

.site-nav__link:hover::after,
.site-nav__link[aria-current='page']::after {
  width: 100%;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-header__cta {
  display: none;
}

/* Hamburger toggle (mobile) */
.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
}

.nav-toggle__bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-navy-900); /* ← Diubah dari white */
  border-radius: var(--radius-full);
  transition: transform var(--dur-base) var(--ease-standard),
    opacity var(--dur-base) var(--ease-standard);
}

.nav-toggle[aria-expanded='true'] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded='true'] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded='true'] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav drawer — anchored as a dropdown directly below the
   header via `top: 100%`, so it always sits flush against the
   header regardless of the header's actual rendered height
   (avoids relying on a fragile hardcoded pixel offset that could
   drift out of sync whenever the header's own height changes). */
.mobile-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: calc(var(--z-nav) - 1);
  max-height: 80vh;
  overflow-y: auto;
  background-color: var(--color-navy-900);
  padding: var(--space-8) var(--container-pad);
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-base) var(--ease-standard),
    transform var(--dur-base) var(--ease-standard),
    visibility 0s linear var(--dur-base);
}

.mobile-nav[data-open='true'] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity var(--dur-base) var(--ease-standard),
    transform var(--dur-base) var(--ease-standard),
    visibility 0s linear 0s;
}

.mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.mobile-nav__link {
  display: block;
  padding: var(--space-4) 0;
  font-size: var(--fs-h4);
  font-weight: var(--fw-semibold);
  color: var(--color-white);
  border-bottom: 1px solid var(--color-navy-600);
}

.mobile-nav__cta {
  width: 100%;
}

@media (prefers-reduced-motion: reduce) {
  .mobile-nav {
    transition: none;
  }
}


/* ---------- Tombol Outline (untuk halaman produk) ---------- */
.btn--outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  background-color: var(--color-white);
  border: 1.5px solid var(--color-blue-500);
  color: var(--color-blue-500);
  border-radius: var(--radius-full);
  font-weight: var(--fw-semibold);
  transition: background-color var(--dur-base) var(--ease-standard),
              color var(--dur-base) var(--ease-standard),
              border-color var(--dur-base) var(--ease-standard);
}

.btn--outline:hover {
  background-color: var(--color-blue-500);
  color: var(--color-white);
  border-color: var(--color-blue-500);
}

/* -----------------------------------------------------------
   BACK TO TOP
   Tombol floating untuk kembali ke atas halaman.
   Tersembunyi saat di atas, muncul setelah user scroll.
   ----------------------------------------------------------- */
.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 90;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background-color: var(--color-orange-500);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  box-shadow: 0 8px 24px -4px rgba(242, 121, 12, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity var(--dur-base) var(--ease-standard),
              visibility var(--dur-base) var(--ease-standard),
              transform var(--dur-base) var(--ease-standard),
              background-color var(--dur-base) var(--ease-standard),
              box-shadow var(--dur-base) var(--ease-standard);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--color-orange-600);
  box-shadow: 0 12px 32px -4px rgba(242, 121, 12, 0.5);
  transform: translateY(-4px);
}

.back-to-top:active {
  transform: translateY(0);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* Fokus keyboard */
.back-to-top:focus-visible {
  outline: 3px solid var(--color-blue-400);
  outline-offset: 3px;
}

/* Mobile — sedikit lebih kecil & rapat ke tepi */
@media (max-width: 640px) {
  .back-to-top {
    bottom: var(--space-4);
    right: var(--space-4);
    width: 44px;
    height: 44px;
  }

  .back-to-top svg {
    width: 18px;
    height: 18px;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .back-to-top {
    transition: opacity var(--dur-fast) linear,
                visibility var(--dur-fast) linear;
    transform: none;
  }
  .back-to-top.is-visible {
    transform: none;
  }
  .back-to-top:hover {
    transform: none;
  }
}