/* ============================================================
   HOME — Obsidian Gateway Homepage
   Covers: Decision Matrix (202), Trust Ribbon (203),
           Bento Grid (204), SVG Diagram + Response Scale (205),
           Neon Pulse CTAs + Scroll Reveal (206)
   All values use --tk-* or Obsidian palette tokens.
   ============================================================ */

/* ── Scroll reveal base (206) ─────────────────────────────── */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity var(--tk-duration-slow) var(--tk-ease-standard),
    transform var(--tk-duration-slow) var(--tk-ease-standard);
}
[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ── Neon Pulse CTA (206) ─────────────────────────────────── */
.tk-btn-neon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--tk-space-2);
  padding: var(--tk-space-3) var(--tk-space-6);
  font-family: var(--tk-font-body);
  font-size: var(--tk-font-size-sm);
  font-weight: var(--tk-weight-semibold);
  letter-spacing: var(--tk-tracking-wide);
  color: var(--tk-ink-100);
  background: var(--electric-pink);
  border: none;
  border-radius: var(--tk-radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition:
    box-shadow var(--tk-duration-md) var(--tk-ease-out),
    background var(--tk-duration-md) var(--tk-ease-out),
    transform var(--tk-duration-fast) var(--tk-ease-out);
}
@media (hover: hover) {
  .tk-btn-neon:hover {
    background: hsl(335, 100%, 65%);
    box-shadow: var(--tk-glow-pink), 0 4px 16px rgba(var(--electric-pink-rgb), 0.35);
    transform: translateY(-1px);
  }
}
.tk-btn-neon:active {
  transform: translateY(0);
  box-shadow: none;
}
.tk-btn-neon:focus-visible {
  outline: 2px solid var(--electric-pink);
  outline-offset: 3px;
}

.tk-btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--tk-space-2);
  padding: var(--tk-space-3) var(--tk-space-5);
  font-family: var(--tk-font-body);
  font-size: var(--tk-font-size-sm);
  font-weight: var(--tk-weight-medium);
  color: var(--tk-ink-300);
  background: transparent;
  border: 1px solid var(--tk-obsidian-600);
  border-radius: var(--tk-radius-sm);
  text-decoration: none;
  transition:
    border-color var(--tk-duration-md) var(--tk-ease-out),
    color var(--tk-duration-md) var(--tk-ease-out),
    box-shadow var(--tk-duration-md) var(--tk-ease-out);
}
@media (hover: hover) {
  .tk-btn-ghost:hover {
    border-color: rgba(var(--electric-pink-rgb), 0.5);
    color: var(--tk-ink-100);
    box-shadow: 0 0 12px rgba(var(--electric-pink-rgb), 0.15);
  }
}
.tk-btn-ghost:focus-visible {
  outline: 2px solid var(--electric-pink);
  outline-offset: 3px;
}

/* ── Homepage shell ───────────────────────────────────────── */
.tk-home {
  background: var(--tk-obsidian-900);
  min-height: 100vh;
  color: var(--tk-ink-100);
}

/* ============================================================
   GATEWAY HERO (202)
   ============================================================ */
.tk-gateway__hero {
  position: relative;
  padding: calc(var(--tk-header-height) + var(--tk-space-9)) var(--tk-space-5) var(--tk-space-8);
  background:
    var(--tk-bg-radial-core),
    var(--tk-bg-linear-depth),
    var(--tk-obsidian-900);
  overflow: hidden;
}

@media (max-width: 768px) {
  .tk-gateway__hero {
    padding: var(--tk-space-6) var(--tk-space-4) var(--tk-space-7);
  }
}

.tk-gateway__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse 80% 50% at 50% 0%,
    rgba(var(--electric-pink-rgb), 0.06) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.tk-gateway__hero-inner {
  max-width: var(--tk-max-w-layout);
  margin: 0 auto;
}

.tk-gateway__eyebrow {
  font-family: var(--tk-font-mono);
  font-size: var(--tk-font-size-xs);
  font-weight: var(--tk-weight-medium);
  letter-spacing: var(--tk-tracking-widest);
  color: var(--electric-pink);
  text-transform: uppercase;
  margin-bottom: var(--tk-space-4);
}

.tk-gateway__title {
  font-family: var(--tk-font-display);
  font-size: var(--tk-fluid-4xl);
  font-weight: var(--tk-weight-bold);
  line-height: var(--tk-leading-tight);
  letter-spacing: var(--tk-tracking-tight);
  color: var(--tk-ink-100);
  max-width: 18ch;
  margin-bottom: var(--tk-space-4);
}

.tk-gateway__lead {
  font-size: var(--tk-fluid-lg);
  color: var(--tk-ink-300);
  max-width: 52ch;
  line-height: var(--tk-leading-snug);
  margin-bottom: var(--tk-space-3);
}

.tk-gateway__support {
  font-size: var(--tk-font-size-sm);
  color: var(--tk-mute-700);
  max-width: 55ch;
  margin-bottom: var(--tk-space-7);
}

/* ── Decision Matrix grid (202) ───────────────────────────── */
.tk-decision-matrix {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--tk-space-5);
  align-items: start;
}

@media (max-width: 900px) {
  .tk-decision-matrix {
    grid-template-columns: 1fr;
    max-width: 480px;
  }
}

/* ── Decision Card (202) ──────────────────────────────────── */
.tk-decision-card {
  --tk-dc-accent: var(--electric-pink);

  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--tk-space-4);
  padding: var(--tk-space-6);
  background: var(--tk-frosted-bg);
  backdrop-filter: blur(var(--tk-frosted-blur));
  -webkit-backdrop-filter: blur(var(--tk-frosted-blur));
  border: 1px solid rgba(var(--electric-pink-rgb), 0.18);
  border-radius: var(--tk-radius-md);
  transition:
    border-color var(--tk-duration-md) var(--tk-ease-out),
    box-shadow var(--tk-duration-md) var(--tk-ease-out),
    transform var(--tk-duration-slow) var(--tk-ease-standard);
}

.tk-decision-card--architect {
  --tk-dc-accent: var(--tk-gold-400);
  border-color: rgba(198, 161, 91, 0.18);
}

.tk-decision-card--union {
  --tk-dc-accent: var(--muted-teal);
  border-color: rgba(var(--muted-teal-rgb), 0.18);
}

@media (hover: hover) {
  .tk-decision-card:hover {
    border-color: var(--tk-dc-accent);
    box-shadow:
      0 0 0 1px var(--tk-dc-accent),
      0 0 32px rgba(var(--electric-pink-rgb), 0.2),
      var(--tk-shadow-deep);
    transform: translateY(-3px);
  }
  .tk-decision-card--architect:hover {
    box-shadow:
      0 0 0 1px var(--tk-gold-400),
      0 0 28px rgba(198, 161, 91, 0.2),
      var(--tk-shadow-deep);
  }
  .tk-decision-card--union:hover {
    box-shadow:
      0 0 0 1px var(--muted-teal),
      0 0 28px rgba(var(--muted-teal-rgb), 0.2),
      var(--tk-shadow-deep);
  }
}

.tk-decision-card:focus-within {
  border-color: var(--tk-dc-accent);
  outline: none;
}

/* Badge */
.tk-decision-card__badge {
  display: inline-block;
  font-family: var(--tk-font-mono);
  font-size: var(--tk-font-size-xs);
  font-weight: var(--tk-weight-medium);
  letter-spacing: var(--tk-tracking-wider);
  text-transform: uppercase;
  color: var(--tk-dc-accent);
  padding: 2px var(--tk-space-2);
  border: 1px solid var(--tk-dc-accent);
  border-radius: var(--tk-radius-xs);
  width: fit-content;
}

/* Title */
.tk-decision-card__title {
  font-family: var(--tk-font-display);
  font-size: var(--tk-fluid-xl);
  font-weight: var(--tk-weight-semibold);
  line-height: var(--tk-leading-snug);
  color: var(--tk-ink-100);
  margin: 0;
}

/* Body */
.tk-decision-card__body {
  font-size: var(--tk-font-size-sm);
  color: var(--tk-ink-500);
  line-height: var(--tk-leading-normal);
  flex-grow: 1;
}

/* CTA */
.tk-decision-card__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--tk-space-3) var(--tk-space-5);
  font-family: var(--tk-font-body);
  font-size: var(--tk-font-size-sm);
  font-weight: var(--tk-weight-semibold);
  letter-spacing: var(--tk-tracking-wide);
  color: var(--tk-obsidian-900);
  background: var(--tk-dc-accent);
  border: none;
  border-radius: var(--tk-radius-sm);
  text-decoration: none;
  margin-top: auto;
  transition:
    filter var(--tk-duration-md) var(--tk-ease-out),
    box-shadow var(--tk-duration-md) var(--tk-ease-out),
    transform var(--tk-duration-fast) var(--tk-ease-out);
}
@media (hover: hover) {
  .tk-decision-card__cta:hover {
    filter: brightness(1.12);
    transform: translateY(-1px);
  }
}
.tk-decision-card__cta:focus-visible {
  outline: 2px solid var(--tk-dc-accent);
  outline-offset: 3px;
}

/* Unavailable state */
.tk-decision-card[aria-disabled="true"] {
  opacity: 0.45;
  pointer-events: none;
}
.tk-decision-card__cta[href="#"] {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ============================================================
   TRUST RIBBON (203)
   ============================================================ */
.tk-trust-ribbon {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--tk-space-7);
  padding: var(--tk-space-5) var(--tk-space-6);
  background: var(--tk-elev-1);
  border-top: 1px solid var(--tk-obsidian-600);
  border-bottom: 1px solid var(--tk-obsidian-600);
}

@media (max-width: 700px) {
  .tk-trust-ribbon {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--tk-space-5);
    padding: var(--tk-space-6) var(--tk-space-5);
  }
}

.tk-trust-item {
  display: flex;
  align-items: center;
  gap: var(--tk-space-3);
  min-width: 0;
}

.tk-trust-item__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: var(--precision-silver);
  opacity: 0.75;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.tk-trust-item__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tk-trust-item__label {
  font-family: var(--tk-font-mono);
  font-size: var(--tk-font-size-xs);
  font-weight: var(--tk-weight-medium);
  letter-spacing: var(--tk-tracking-wide);
  color: var(--tk-ink-300);
  white-space: nowrap;
}

.tk-trust-item__support {
  font-family: var(--tk-font-body);
  font-size: var(--tk-font-size-xs);
  color: var(--tk-mute-700);
  white-space: nowrap;
}

/* divider between items */
.tk-trust-ribbon__divider {
  width: 1px;
  height: 28px;
  background: var(--tk-obsidian-600);
  flex-shrink: 0;
}
@media (max-width: 700px) {
  .tk-trust-ribbon__divider {
    display: none;
  }
}

/* ============================================================
   BENTO GRID (204)
   ============================================================ */
.tk-bento-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  grid-template-rows: auto;
  gap: var(--tk-space-4);
  max-width: var(--tk-max-w-layout);
  margin: 0 auto;
  padding: var(--tk-space-8) var(--tk-space-5);
}

@media (max-width: 768px) {
  .tk-bento-grid {
    grid-template-columns: 1fr;
    padding: var(--tk-space-6) var(--tk-space-5);
  }
}

/* ── Bento Card base (204) ─────────────────────────────────── */
.tk-bento-card {
  position: relative;
  padding: var(--tk-space-6);
  background: var(--tk-elev-1);
  border: 1px solid var(--tk-obsidian-600);
  border-radius: var(--tk-radius-2);
  display: flex;
  flex-direction: column;
  gap: var(--tk-space-4);
  overflow: hidden;
}

.tk-bento-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.015) 0%,
    transparent 60%
  );
  pointer-events: none;
}

/* Grid placement variants */
.tk-bento-card--why {
  grid-column: 1 / 2;
  grid-row: 1;
}
.tk-bento-card--diagram {
  grid-column: 2 / 3;
  grid-row: 1 / 3;
}
.tk-bento-card--what {
  grid-column: 1 / 2;
  grid-row: 2;
}
.tk-bento-card--scoring {
  grid-column: 1 / 3;
  grid-row: 3;
}

@media (max-width: 768px) {
  .tk-bento-card--why,
  .tk-bento-card--diagram,
  .tk-bento-card--what,
  .tk-bento-card--scoring {
    grid-column: 1 / 2;
    grid-row: auto;
  }
}

/* Card typography */
.tk-bento-card__title {
  font-family: var(--tk-font-display);
  font-size: var(--tk-fluid-xl);
  font-weight: var(--tk-weight-semibold);
  color: var(--tk-ink-100);
  line-height: var(--tk-leading-snug);
  margin: 0;
}

.tk-bento-card__body {
  font-size: var(--tk-font-size-sm);
  color: var(--tk-ink-500);
  line-height: var(--tk-leading-normal);
}

.tk-bento-card__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--tk-space-3);
}

.tk-bento-card__list li {
  font-size: var(--tk-font-size-sm);
  color: var(--tk-ink-500);
  padding-left: var(--tk-space-5);
  position: relative;
  line-height: var(--tk-leading-normal);
}

.tk-bento-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--electric-pink);
  opacity: 0.6;
}

.tk-bento-card__footer {
  margin-top: auto;
}

.tk-bento-card__link {
  font-family: var(--tk-font-mono);
  font-size: var(--tk-font-size-xs);
  font-weight: var(--tk-weight-medium);
  letter-spacing: var(--tk-tracking-wide);
  color: var(--electric-pink);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--tk-space-2);
  transition: color var(--tk-duration-md) var(--tk-ease-out);
}

.tk-bento-card__link::after {
  content: "→";
}

@media (hover: hover) {
  .tk-bento-card__link:hover {
    color: hsl(335, 100%, 72%);
  }
}

.tk-bento-card__link:focus-visible {
  outline: 2px solid var(--electric-pink);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ============================================================
   SVG CONCEPT DIAGRAM (205)
   ============================================================ */
.tk-concept-diagram {
  display: flex;
  flex-direction: column;
  gap: var(--tk-space-4);
  height: 100%;
}

.tk-concept-diagram__svg {
  width: 100%;
  height: auto;
  max-width: 280px;
  margin: auto;
  display: block;
  overflow: visible;
}

/* SVG element theming via CSS */
.tk-concept-diagram__svg .cd-hub-ring {
  fill: var(--tk-elev-3);
  stroke: var(--electric-pink);
  stroke-width: 1.5;
}

.tk-concept-diagram__svg .cd-hub-label {
  fill: var(--tk-ink-100);
  font-family: var(--tk-font-display);
  font-size: 9px;
  font-weight: 600;
  text-anchor: middle;
  dominant-baseline: middle;
}

.tk-concept-diagram__svg .cd-spoke {
  stroke: var(--tk-obsidian-600);
  stroke-width: 1;
  stroke-dasharray: 3 3;
}

.tk-concept-diagram__svg .cd-node-ring {
  fill: var(--tk-elev-2);
  stroke: var(--precision-silver);
  stroke-width: 1;
  opacity: 0.8;
}

.tk-concept-diagram__svg .cd-node-label {
  fill: var(--precision-silver);
  font-family: var(--tk-font-mono);
  font-size: 7px;
  text-anchor: middle;
  dominant-baseline: middle;
}

.tk-concept-diagram__svg .cd-arch-connector {
  stroke: var(--electric-pink);
  stroke-width: 1;
  fill: none;
  opacity: 0.4;
}

.tk-concept-diagram__svg .cd-arch-ring {
  fill: var(--tk-elev-1);
  stroke: var(--electric-pink);
  stroke-width: 1.5;
  opacity: 0.9;
}

.tk-concept-diagram__svg .cd-arch-label {
  fill: var(--electric-pink);
  font-family: var(--tk-font-mono);
  font-size: 7px;
  font-weight: 600;
  text-anchor: middle;
  dominant-baseline: middle;
}

.tk-concept-diagram__caption {
  font-family: var(--tk-font-body);
  font-size: var(--tk-font-size-xs);
  color: var(--tk-mute-700);
  line-height: var(--tk-leading-normal);
  text-align: center;
}

/* ============================================================
   RESPONSE SCALE (205)
   ============================================================ */
.tk-response-scale {
  display: flex;
  flex-direction: column;
  gap: var(--tk-space-2);
  width: 100%;
  min-width: 240px;
}

.tk-response-scale__track {
  display: flex;
  align-items: center;
  gap: 0;
  width: 100%;
  position: relative;
}

.tk-response-scale__dot {
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--tk-obsidian-600);
  border: 1.5px solid var(--electric-pink);
  opacity: 0.4;
  transition: opacity var(--tk-duration-md) var(--tk-ease-out);
  position: relative;
  z-index: 1;
}

.tk-response-scale__dot[data-pos="1"],
.tk-response-scale__dot[data-pos="5"] {
  opacity: 0.75;
  border-color: var(--electric-pink);
  background: rgba(var(--electric-pink-rgb), 0.2);
}

.tk-response-scale__connector {
  flex: 1;
  height: 1px;
  background: var(--tk-obsidian-600);
}

.tk-response-scale__labels {
  display: flex;
  justify-content: space-between;
  width: 100%;
}

.tk-response-scale__label-start,
.tk-response-scale__label-end {
  font-family: var(--tk-font-mono);
  font-size: var(--tk-font-size-xs);
  color: var(--tk-mute-700);
  letter-spacing: var(--tk-tracking-wide);
}

/* ============================================================
   RETURNING USER SECTION
   ============================================================ */
.tk-home__returning {
  max-width: var(--tk-max-w-layout);
  margin: 0 auto;
  padding: var(--tk-space-7) var(--tk-space-5);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--tk-space-5);
  border-top: 1px solid var(--tk-obsidian-600);
}

.tk-home__returning-text {
  display: flex;
  flex-direction: column;
  gap: var(--tk-space-2);
}

.tk-home__returning-label {
  font-family: var(--tk-font-mono);
  font-size: var(--tk-font-size-xs);
  letter-spacing: var(--tk-tracking-wider);
  text-transform: uppercase;
  color: var(--tk-mute-700);
}

.tk-home__returning-title {
  font-family: var(--tk-font-display);
  font-size: var(--tk-fluid-xl);
  font-weight: var(--tk-weight-semibold);
  color: var(--tk-ink-100);
  margin: 0;
}

.tk-home__returning-actions {
  display: flex;
  align-items: center;
  gap: var(--tk-space-4);
  flex-wrap: wrap;
}

.tk-home__register-link {
  font-size: var(--tk-font-size-sm);
  color: var(--tk-ink-500);
  text-decoration: none;
  transition: color var(--tk-duration-md) var(--tk-ease-out);
}

@media (hover: hover) {
  .tk-home__register-link:hover {
    color: var(--tk-ink-100);
  }
}

/* ============================================================
   BOTTOM CTA BLOCK
   ============================================================ */
.tk-home__cta-block {
  text-align: center;
  padding: var(--tk-space-9) var(--tk-space-5);
  max-width: var(--tk-max-w-layout);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--tk-space-5);
  border-top: 1px solid var(--tk-obsidian-600);
}

.tk-home__cta-title {
  font-family: var(--tk-font-display);
  font-size: var(--tk-fluid-3xl);
  font-weight: var(--tk-weight-bold);
  color: var(--tk-ink-100);
  max-width: 24ch;
  line-height: var(--tk-leading-snug);
  margin: 0;
}

.tk-home__cta-body {
  font-size: var(--tk-font-size-sm);
  color: var(--tk-ink-500);
  max-width: 48ch;
  line-height: var(--tk-leading-normal);
}

/* ── Utility ──────────────────────────────────────────────── */
.tk-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}