/* ───────────────────────────────────────────────────────────
   PAGES-FX
   Reusable AI/futuristic polish for interior pages (features,
   pricing, about, contact, signin, skills, ai).
   Applied via .reveal data-reveal, .page-halo, .ai-card.
   Builds on top of variables.css + ai-futuristic.css.
   ─────────────────────────────────────────────────────────── */

/* ─── Hero halo: ambient gradient wash + ring behind page heroes ─── */
.page-halo {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.page-halo::before {
  content: "";
  position: absolute;
  top: -30%;
  left: 50%;
  width: 1100px;
  height: 1100px;
  transform: translateX(-50%);
  background: radial-gradient(circle at center,
    color-mix(in srgb, var(--accent) 26%, transparent) 0%,
    color-mix(in srgb, var(--ai-cyan) 14%, transparent) 28%,
    transparent 55%);
  filter: blur(40px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.85;
  animation: page-halo-pulse 12s ease-in-out infinite;
}

.page-halo::after {
  content: "";
  position: absolute;
  top: 60px;
  left: 50%;
  width: 760px;
  height: 760px;
  transform: translateX(-50%);
  border: 1px dashed color-mix(in srgb, var(--accent) 30%, transparent);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.55;
  animation: page-halo-spin 40s linear infinite;
  -webkit-mask: radial-gradient(circle, transparent 38%, #000 39%);
          mask: radial-gradient(circle, transparent 38%, #000 39%);
}

.page-halo > * {
  position: relative;
  z-index: 1;
}

@keyframes page-halo-pulse {
  0%, 100% { opacity: 0.7; transform: translateX(-50%) scale(1); }
  50% { opacity: 1; transform: translateX(-50%) scale(1.08); }
}

@keyframes page-halo-spin {
  to { transform: translateX(-50%) rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .page-halo::before,
  .page-halo::after { animation: none; }
}

/* ─── Page hero badge (the "● live" eyebrow chip used on inner pages) ─── */
.page-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--border));
  background: color-mix(in srgb, var(--accent) 8%, var(--bg-elevated));
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.page-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ai-mint);
  box-shadow: 0 0 8px var(--ai-mint);
  animation: page-badge-pulse 1.8s ease-in-out infinite;
}

@keyframes page-badge-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

/* ─── Hero title size bump on inner pages ─── */
.page-hero-nn__title,
main h1 {
  letter-spacing: -0.04em;
}

main h1 {
  background: linear-gradient(115deg,
    var(--text) 0%,
    var(--text) 45%,
    color-mix(in srgb, var(--accent) 55%, var(--text)) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Don't gradient-clip on the signin page logo etc., just headings within main */
main h1.no-gradient {
  background: none;
  -webkit-text-fill-color: currentColor;
}

/* ─── AI-styled card (reuse on inner pages where .card is generic) ─── */
.card,
.diagram-card,
.visual-tile,
.stat-bubble {
  position: relative;
  transition:
    transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
    border-color 0.3s ease,
    box-shadow 0.3s ease;
}

.card:hover,
.visual-tile:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
  box-shadow: 0 12px 32px -16px color-mix(in srgb, var(--accent) 35%, transparent);
}

.diagram-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.diagram-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%,
    color-mix(in srgb, var(--accent) 22%, transparent) 0%,
    transparent 55%);
  pointer-events: none;
}

.diagram-card svg {
  position: relative;
  z-index: 1;
}

.diagram-card svg circle {
  transform-origin: center;
  animation: diagram-node-pulse 2.6s ease-in-out infinite;
}

.diagram-card svg circle:nth-child(odd) { animation-delay: 0.4s; }
.diagram-card svg circle:nth-child(3n) { animation-delay: 0.8s; }

@keyframes diagram-node-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.18); }
}

@media (prefers-reduced-motion: reduce) {
  .diagram-card svg circle { animation: none; }
}

/* ─── Stat bubbles: animated AI accent ─── */
.stat-bubble {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  background: var(--bg-elevated);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.stat-bubble::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--ai-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.stat-bubble:hover::before {
  transform: scaleX(1);
}

.stat-bubble strong {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--ai-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-bubble span {
  display: block;
  margin-top: 4px;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ─── Timeline tiles: futuristic vertical accent rail ─── */
.timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  position: relative;
}

@media (max-width: 720px) {
  .timeline { grid-template-columns: 1fr; }
}

.timeline__item {
  padding: var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  position: relative;
  overflow: hidden;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--ai-gradient);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.timeline__item:hover::before {
  transform: scaleY(1);
}

.timeline__item strong {
  font-size: 1.0625rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--ai-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ─── Signin card: ambient AI gradient backdrop ─── */
.signin-card {
  max-width: 420px;
  margin: 0 auto;
  padding: var(--space-7) !important;
  background: color-mix(in srgb, var(--bg-elevated) 92%, var(--accent)) !important;
  border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--border)) !important;
  box-shadow:
    0 30px 60px -20px color-mix(in srgb, var(--accent) 25%, transparent),
    inset 0 0 0 1px color-mix(in srgb, var(--ai-cyan) 8%, transparent) !important;
  position: relative;
  isolation: isolate;
}

.signin-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: conic-gradient(
    from var(--holo-angle, 0deg),
    transparent 0deg,
    color-mix(in srgb, var(--accent) 70%, transparent) 60deg,
    color-mix(in srgb, var(--ai-cyan) 70%, transparent) 120deg,
    transparent 180deg,
    transparent 360deg
  );
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: holo-rotate 10s linear infinite;
  pointer-events: none;
}

.signin-card .input {
  background: color-mix(in srgb, var(--bg) 92%, var(--accent));
  border-color: color-mix(in srgb, var(--accent) 18%, var(--border));
}

.signin-card .input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft), 0 0 24px -4px color-mix(in srgb, var(--accent) 45%, transparent);
}

.signin-main {
  position: relative;
  padding: clamp(var(--space-6), 8vw, var(--space-8)) 0;
  min-height: 80vh;
  display: flex;
  align-items: center;
}

/* ─── Contact form polish ─── */
.contact-form .field {
  margin-bottom: var(--space-3);
}

.contact-form .input:focus,
.contact-form .select:focus {
  box-shadow: 0 0 0 3px var(--accent-soft), 0 0 24px -6px color-mix(in srgb, var(--accent) 45%, transparent);
}

/* ─── Pricing card upgrades on pricing.html ─── */
.pricing-card {
  position: relative;
}

.pricing-card__price {
  background: linear-gradient(115deg, var(--text), color-mix(in srgb, var(--accent) 45%, var(--text)));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ─── Feature card hover glow on features.html ─── */
.feature-card {
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--accent) 22%, transparent),
    transparent 60%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
  z-index: 0;
}

.feature-card:hover::after {
  opacity: 1;
}

.feature-card > * {
  position: relative;
  z-index: 1;
}

/* ─── Section staggered reveal (extends motion.css reveal) ─── */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0s; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 0.08s; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 0.16s; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 0.24s; }
.reveal-stagger.is-visible > *:nth-child(5) { transition-delay: 0.32s; }
.reveal-stagger.is-visible > *:nth-child(6) { transition-delay: 0.4s; }

.reveal-stagger.is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Section header underline already in ai-futuristic.css, but ensure inner pages get it too ─── */
main h2 {
  position: relative;
}

/* ─── Neural canvas page hero: stronger gradient overlay ─── */
.page-hero-nn {
  position: relative;
  overflow: hidden;
  /* Override neural.css: keep hero compact so content is visible above the fold */
  min-height: 0 !important;
  padding: clamp(var(--space-5), 6vw, var(--space-6)) 0 var(--space-5) !important;
}

.page-hero-nn::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 30%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 60%),
    radial-gradient(ellipse at 80% 80%, color-mix(in srgb, var(--ai-cyan) 14%, transparent), transparent 55%);
  pointer-events: none;
  z-index: 0;
}

.page-hero-nn__content {
  position: relative;
  z-index: 1;
}

/* Cap the neural canvas inside compact heroes — canvas overlays as background only,
   never contributes to section height */
.page-hero-nn .nn-stage {
  position: absolute !important;
  inset: 0 !important;
  min-height: 0 !important;
  height: auto !important;
  z-index: 0;
}

.page-hero-nn #neural-canvas {
  position: absolute !important;
  inset: 0 !important;
  width: 100% !important;
  height: 100% !important;
  min-height: 0 !important;
}

/* Tighten lead/title spacing inside compact hero */
.page-hero-nn .page-hero-nn__title {
  margin-top: var(--space-2);
}

.page-hero-nn .page-hero-nn__lead {
  margin-top: var(--space-3);
}

/* ─── Diagram cards: subtle inner accent ring ─── */
.split-panel .diagram-card {
  background: linear-gradient(160deg,
    var(--bg-elevated) 0%,
    color-mix(in srgb, var(--bg-elevated) 92%, var(--accent)) 100%) !important;
  border: 1px solid color-mix(in srgb, var(--accent) 22%, var(--border)) !important;
}

/* ─── Subtle floating animation on diagrams / illustrations ─── */
.diagram-card svg {
  animation: diagram-float 6s ease-in-out infinite;
  transform-origin: center;
}

@keyframes diagram-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@media (prefers-reduced-motion: reduce) {
  .diagram-card svg { animation: none; }
}

/* ─── Site footer: subtle AI gradient top border ─── */
.site-footer {
  position: relative;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
    transparent 0%,
    color-mix(in srgb, var(--accent) 40%, transparent) 20%,
    color-mix(in srgb, var(--ai-cyan) 40%, transparent) 50%,
    color-mix(in srgb, var(--accent) 40%, transparent) 80%,
    transparent 100%);
}

/* ─── Split panel responsive grid (used by about/contact) ─── */
.split-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: stretch;
}

@media (max-width: 860px) {
  .split-panel { grid-template-columns: 1fr; }
}

/* ─── Stat row: tighter polished grid ─── */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-3);
  margin: var(--space-5) 0;
}

/* ─── Page-features filter pills (existing pattern hint) ─── */
.page-features main .filter,
.page-features main .filter-pill {
  transition: transform 0.2s ease, border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.page-features main .filter:hover,
.page-features main .filter-pill:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  color: var(--accent);
}

/* ─── Skills page: course-card extras (category chip, footer row, jobs) ─── */
.course-card {
  position: relative;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.3s ease, box-shadow 0.3s ease !important;
}

.course-card:hover {
  transform: translateY(-4px) !important;
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border)) !important;
  box-shadow: 0 14px 40px -16px color-mix(in srgb, var(--accent) 30%, transparent);
}

.course-card__media {
  position: relative;
  overflow: hidden;
}

.course-card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(15, 23, 42, 0.55) 100%);
  pointer-events: none;
}

.course-card__cat-chip {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 1;
  padding: 5px 10px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 80%, rgba(15, 23, 42, 0.5));
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid color-mix(in srgb, #fff 25%, transparent);
}

.course-card__badge {
  border: 1px solid var(--border) !important;
  background: color-mix(in srgb, var(--bg-muted) 80%, transparent) !important;
  color: var(--text) !important;
  font-size: 0.7rem !important;
}

.course-card__footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px dashed var(--border);
  font-size: 0.75rem;
}

.course-card__ref {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color: var(--text-muted);
  font-weight: 600;
}

.course-card__fund {
  font-weight: 700;
  background: var(--ai-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-variant-numeric: tabular-nums;
}

.course-card__actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.course-card__actions .btn {
  flex: 1;
  min-width: 120px;
  justify-content: center;
}

/* ─── Skills modal: job titles + Skills England link styling ─── */
.modal-jobs {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px dashed var(--border);
}

.modal-jobs__label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
}

.modal-jobs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.modal-job-chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text);
  background: color-mix(in srgb, var(--accent) 8%, var(--bg-muted));
  border: 1px solid color-mix(in srgb, var(--accent) 18%, var(--border));
  white-space: nowrap;
}

.modal-job-chip--more {
  font-style: italic;
  color: var(--text-muted);
  background: transparent;
}

/* Modal footer: ensure Skills England link is visually prominent */
.modal-footer-actions .btn--primary {
  background: var(--ai-gradient);
  border-color: transparent;
  box-shadow: 0 10px 32px -10px color-mix(in srgb, var(--accent) 55%, transparent);
}

.modal-footer-actions .btn--primary:hover {
  filter: brightness(1.06);
}

/* Modal info card icon: themed background by default */
.modal-info-card-icon {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
  margin-bottom: var(--space-2);
}

/* Category pill tweak — make AI-themed */
.category-pill {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-muted);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s, transform 0.2s;
}

.category-pill:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  color: var(--accent);
  transform: translateY(-1px);
}

.category-pill.is-active {
  background: var(--ai-gradient);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 6px 16px -8px color-mix(in srgb, var(--accent) 55%, transparent);
}

.category-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.skills-results {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin: 0 0 var(--space-4);
}

.skills-no-results {
  text-align: center;
  padding: var(--space-7) var(--space-4);
  color: var(--text-muted);
}

/* ─── Generic .ai-card decorator (use on cards that want extra polish) ─── */
.ai-card {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.ai-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right,
    color-mix(in srgb, var(--accent) 14%, transparent),
    transparent 60%);
  pointer-events: none;
  z-index: 0;
}

.ai-card > * { position: relative; z-index: 1; }