/* ==========================================================================
   Scanner Sentinel - Components (buttons, nav, cards, chips, accordion)
   ========================================================================== */

/* ---- Icons ---------------------------------------------------------------- */

.icon {
  width: 1.25em;
  height: 1.25em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ---- Buttons --------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition:
    background-color var(--duration-fast) ease,
    border-color var(--duration-fast) ease,
    color var(--duration-fast) ease,
    box-shadow var(--duration-fast) ease,
    transform var(--duration-fast) ease;
}

.btn .icon {
  width: 1.1em;
  height: 1.1em;
  transition: transform var(--duration-fast) ease;
}

.btn:hover .icon--arrow {
  transform: translateX(3px);
}

.btn--primary {
  background: linear-gradient(135deg, var(--green-500), var(--green-600));
  color: var(--navy-950);
  box-shadow: 0 4px 18px rgba(34, 197, 94, 0.28);
}

.btn--primary:hover {
  background: linear-gradient(135deg, var(--green-400), var(--green-500));
  box-shadow: 0 6px 26px rgba(34, 197, 94, 0.42);
  transform: translateY(-1px);
}

.btn--primary:active {
  transform: translateY(0);
}

/* Outline on dark canvases */
.btn--outline {
  color: var(--text-on-dark-primary);
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.02);
}

.btn--outline:hover {
  border-color: var(--green-400);
  color: var(--green-300);
  background: rgba(34, 197, 94, 0.06);
}

/* Outline on light canvases */
.btn--outline-light {
  color: var(--navy-900);
  border: 1px solid var(--paper-200);
  background: var(--white);
}

.btn--outline-light:hover {
  border-color: var(--green-500);
  color: var(--green-600);
}

.btn--lg {
  padding: 0.95rem 2rem;
  font-size: var(--fs-base);
}

/* ---- Text link with arrow --------------------------------------------------- */

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-sm);
  color: var(--green-400);
  transition: color var(--duration-fast) ease, gap var(--duration-fast) ease;
}

.link-arrow:hover {
  color: var(--green-300);
  gap: var(--space-3);
}

/* ==========================================================================
   Scroll progress line (top of viewport, above the sticky header)
   ========================================================================== */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 300;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--green-500), var(--blue-500));
  box-shadow: 0 0 12px rgba(34, 197, 94, 0.55);
}

/* Scroll-driven where supported: zero JS, perfectly smooth */
@supports (animation-timeline: scroll()) {
  .scroll-progress__bar {
    animation: progress-scale linear both;
    animation-timeline: scroll(root block);
  }
}

@keyframes progress-scale {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* ==========================================================================
   Header / Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 22, 40, 0.82);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition:
    border-color var(--duration-base) ease,
    box-shadow var(--duration-base) ease,
    background-color var(--duration-base) ease;
}

.site-header.is-scrolled {
  background: rgba(7, 15, 29, 0.92);
  border-bottom-color: var(--border-on-dark);
  box-shadow: 0 10px 34px rgba(0, 0, 0, 0.35);
}

.site-header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-5);
  min-height: 76px;
}

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--text-on-dark-primary);
}

/* Soft glow disc behind the navy shield so it reads on the navy header */
.brand__badge {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  flex: none;
  border-radius: 50%;
  background: radial-gradient(
    circle at 50% 42%,
    rgba(26, 155, 245, 0.4),
    rgba(26, 155, 245, 0.1) 58%,
    transparent 78%
  );
}

.brand__mark {
  height: 36px;
  width: auto;
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.5)) drop-shadow(0 0 10px rgba(26, 155, 245, 0.45));
}

.brand__text {
  display: flex;
  flex-direction: column;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: var(--fw-bold);
  line-height: 1.05;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.brand__name span {
  color: var(--green-400);
}

.brand__tagline {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-on-dark-muted);
  margin-top: 2px;
}

/* Nav links */
.site-nav {
  justify-self: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-4), 2.5vw, var(--space-6));
}

.site-nav__link {
  position: relative;
  padding: var(--space-2) 0;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  white-space: nowrap;
  color: var(--text-on-dark-secondary);
  transition: color var(--duration-fast) ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--green-400);
  transition: right var(--duration-base) var(--ease-standard);
}

.site-nav__link:hover,
.site-nav__link.is-active {
  color: var(--white);
}

.site-nav__link:hover::after,
.site-nav__link.is-active::after {
  right: 0;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Hamburger */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-on-dark-primary);
}

.nav-toggle .icon {
  width: 26px;
  height: 26px;
}

.nav-toggle__close {
  display: none;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__open {
  display: none;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__close {
  display: block;
}

/* Mobile layout */
@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-header__inner {
    grid-template-columns: auto auto;
    justify-content: space-between;
  }

  .brand {
    grid-row: 1;
    grid-column: 1;
  }

  .site-header__actions {
    grid-row: 1;
    grid-column: 2;
    justify-self: end;
  }

  .site-header__actions .btn--outline {
    display: none;
  }

  .site-nav {
    grid-row: 2;
    grid-column: 1 / -1;
    justify-self: stretch;
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition:
      max-height var(--duration-base) var(--ease-standard),
      opacity var(--duration-base) ease;
  }

  .site-nav.is-open {
    max-height: 420px;
    opacity: 1;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-block: var(--space-3) var(--space-5);
    border-top: 1px solid var(--border-on-dark);
  }

  .site-nav__link {
    display: block;
    padding: var(--space-3) var(--space-2);
    font-size: var(--fs-base);
  }

  .site-nav__link::after {
    display: none;
  }
}

@media (max-width: 560px) {
  /* Brand + CTA + hamburger don't fit side by side; the hero repeats the
     primary CTA immediately below, so the header keeps only the hamburger. */
  .site-header__actions .btn--primary {
    display: none;
  }
}

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

/* ==========================================================================
   Checklist (green check bullet lists)
   ========================================================================== */

.checklist {
  display: grid;
  gap: var(--space-3) var(--space-6);
}

.checklist--two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--fs-sm);
  line-height: var(--lh-snug);
}

.checklist .icon {
  width: 1.15rem;
  height: 1.15rem;
  margin-top: 0.14rem;
  color: var(--green-400);
}

.section--dark .checklist li {
  color: var(--text-on-dark-secondary);
}

@media (max-width: 560px) {
  .checklist--two-col {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Dashboard placeholder atoms (hero + "One Dashboard" panels)
   ========================================================================== */

/* Stat tile */
.stat-tile {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-on-dark);
  min-width: 0;
}

.stat-tile__value {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: var(--fw-semibold);
  line-height: 1.1;
  color: var(--white);
}

.stat-tile__label {
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-on-dark-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.stat-tile--ok .stat-tile__value { color: var(--green-400); }
.stat-tile--critical .stat-tile__value { color: var(--severity-critical); }
.stat-tile--warning .stat-tile__value { color: var(--severity-warning); }

/* Status pill */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.14rem 0.6rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: var(--fw-medium);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.status-pill::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.status-pill--online {
  color: var(--green-400);
  background: var(--severity-normal-soft);
}

.status-pill--warning {
  color: var(--severity-warning);
  background: var(--severity-warning-soft);
}

.status-pill--critical {
  color: var(--severity-critical);
  background: var(--severity-critical-soft);
}

/* Status row (name + pill) */
.status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.78rem;
  color: var(--text-on-dark-secondary);
}

.status-row:last-child {
  border-bottom: 0;
}

.status-row__name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Alert chip */
.alert-chip {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-on-dark);
  background: rgba(255, 255, 255, 0.03);
  border-left-width: 3px;
}

.alert-chip .icon {
  width: 1rem;
  height: 1rem;
  margin-top: 0.1rem;
}

.alert-chip__title {
  font-size: 0.78rem;
  font-weight: var(--fw-semibold);
  color: var(--white);
  line-height: 1.3;
}

.alert-chip__meta {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-on-dark-muted);
  margin-top: 2px;
}

.alert-chip--critical {
  border-left-color: var(--severity-critical);
}
.alert-chip--critical .icon { color: var(--severity-critical); }

.alert-chip--warning {
  border-left-color: var(--severity-warning);
}
.alert-chip--warning .icon { color: var(--severity-warning); }

.alert-chip--normal {
  border-left-color: var(--severity-normal);
}
.alert-chip--normal .icon { color: var(--severity-normal); }

/* Live dot (pulsing) */
.live-dot {
  position: relative;
  width: 8px;
  height: 8px;
  flex: none;
  border-radius: 50%;
  background: var(--green-400);
}

.live-dot::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid var(--green-400);
  opacity: 0;
  animation: live-pulse 2.2s ease-out infinite;
}

@keyframes live-pulse {
  0% { transform: scale(0.4); opacity: 0.8; }
  70% { transform: scale(1.4); opacity: 0; }
  100% { transform: scale(1.4); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .live-dot::after {
    animation: none;
  }
}

/* Mini chart (SVG line drawing) */
.mini-chart {
  width: 100%;
  height: auto;
}

.mini-chart__line {
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  transition: stroke-dashoffset 1600ms var(--ease-standard) 250ms;
}

.is-visible .mini-chart__line,
.is-loaded .mini-chart__line {
  stroke-dashoffset: 0;
}

.mini-chart__area {
  opacity: 0;
  transition: opacity 900ms ease 1000ms;
}

.is-visible .mini-chart__area,
.is-loaded .mini-chart__area {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .mini-chart__line {
    stroke-dashoffset: 0;
    transition: none;
  }
  .mini-chart__area {
    opacity: 1;
    transition: none;
  }
}

/* ==========================================================================
   FAQ accordion
   ========================================================================== */

.faq-item {
  border: 1px solid var(--border-on-light);
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: 0 2px 10px rgba(10, 22, 40, 0.04);
  transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
  align-self: start;
}

.faq-item:hover {
  border-color: var(--green-500);
}

.faq-item.is-open {
  border-color: var(--green-500);
  box-shadow: 0 8px 26px rgba(10, 22, 40, 0.08);
}

.faq-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
  padding: var(--space-4) var(--space-5);
  text-align: left;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--navy-900);
  line-height: var(--lh-snug);
}

.faq-trigger .icon {
  width: 1.1rem;
  height: 1.1rem;
  color: var(--green-600);
  transition: transform var(--duration-base) var(--ease-standard);
}

.faq-trigger[aria-expanded="true"] .icon {
  transform: rotate(45deg);
}

.faq-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration-base) var(--ease-standard);
}

.faq-panel__body {
  padding: 0 var(--space-5) var(--space-5);
  font-size: var(--fs-sm);
  color: var(--text-on-light-secondary);
}

@media (prefers-reduced-motion: reduce) {
  .faq-panel,
  .faq-trigger .icon {
    transition: none;
  }
}