/* Shared public marketing primitives for the homepage and diagnostic route.
   Keep application/workspace styles in course-shell.css and route behavior in JS. */

.marketing-page {
  --marketing-ink: var(--bc-text, var(--diagnostic-ink, #111827));
  --marketing-ink-soft: var(--bc-text-soft, #23304d);
  --marketing-muted: var(--bc-muted, var(--diagnostic-muted, #66728a));
  --marketing-blue: var(--bc-primary, var(--diagnostic-blue, #0759d9));
  --marketing-blue-dark: var(--bc-primary-strong, var(--diagnostic-blue-dark, #0849ad));
  --marketing-blue-soft: var(--bc-primary-soft, #e9efff);
  --marketing-canvas: var(--bc-bg, var(--diagnostic-wash, #f5f8ff));
  --marketing-surface: var(--bc-surface, var(--diagnostic-paper, #ffffff));
  --marketing-border: var(--bc-border-strong, var(--diagnostic-line, #cbd8ef));
  --marketing-border-soft: var(--bc-border, #e2e9f5);
  --marketing-success: var(--bc-success, var(--diagnostic-teal, #16845b));
  --marketing-warning: var(--bc-warning, var(--diagnostic-yellow, #b86f00));
  --marketing-danger: var(--bc-danger, var(--diagnostic-pink, #cc4652));
  --marketing-radius: 16px;
  --marketing-radius-small: 11px;
  --marketing-shadow: 0 18px 42px rgba(27, 52, 96, .09);
  --marketing-shadow-strong: 0 26px 64px rgba(27, 52, 96, .13);
  --marketing-container: 1240px;
  --marketing-section-space: clamp(72px, 9vw, 118px);
  color: var(--marketing-ink);
}

.marketing-container {
  width: min(var(--marketing-container), calc(100% - 64px));
  margin-inline: auto;
}

.marketing-section {
  padding-block: var(--marketing-section-space);
}

.marketing-section--compact {
  padding-block: clamp(44px, 6vw, 76px);
}

.marketing-section-header {
  max-width: 760px;
  margin-bottom: clamp(28px, 4vw, 46px);
}

.marketing-eyebrow {
  margin: 0 0 12px;
  color: var(--marketing-blue);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .11em;
  line-height: 1.35;
  text-transform: uppercase;
}

.marketing-heading {
  max-width: 18ch;
  margin: 0;
  color: var(--marketing-ink);
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -.038em;
  line-height: 1.04;
  text-wrap: balance;
}

.marketing-copy {
  max-width: 66ch;
  margin: 18px 0 0;
  color: var(--marketing-muted);
  font-size: clamp(1rem, 1.4vw, 1.12rem);
  line-height: 1.62;
}

.marketing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.marketing-button {
  min-height: 52px;
  padding: 12px 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid var(--marketing-blue);
  border-radius: var(--marketing-radius-small);
  color: var(--marketing-blue);
  font: inherit;
  font-weight: 800;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.marketing-button--primary {
  background: var(--marketing-blue);
  color: #fff;
  box-shadow: 0 10px 22px rgba(7, 89, 217, .19);
}

.marketing-button--primary:hover:not(:disabled) {
  border-color: var(--marketing-blue-dark);
  background: var(--marketing-blue-dark);
  transform: translateY(-1px);
  box-shadow: 0 14px 26px rgba(7, 89, 217, .24);
}

.marketing-button--secondary {
  background: var(--marketing-surface);
}

.marketing-button--secondary:hover:not(:disabled) {
  background: var(--marketing-blue-soft);
}

.marketing-button:focus-visible {
  outline: 3px solid rgba(7, 89, 217, .24);
  outline-offset: 3px;
}

.marketing-button:disabled,
.marketing-button[aria-disabled="true"] {
  opacity: .52;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.marketing-card {
  min-width: 0;
  border: 1px solid var(--marketing-border-soft);
  border-radius: var(--marketing-radius);
  background: var(--marketing-surface);
}

.marketing-card--padded {
  padding: clamp(22px, 3vw, 32px);
}

.marketing-card--elevated {
  border-color: var(--marketing-border);
  box-shadow: var(--marketing-shadow);
}

.marketing-card.is-interactive {
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.marketing-card.is-interactive:hover,
.marketing-card.is-interactive:focus-within {
  border-color: var(--marketing-blue);
  transform: translateY(-2px);
  box-shadow: var(--marketing-shadow-strong);
}

.marketing-proof-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.marketing-proof-card {
  min-height: 100%;
  display: grid;
  align-content: start;
  gap: 18px;
}

.marketing-proof-card h3 {
  margin: 0;
  color: var(--marketing-ink);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  line-height: 1.2;
}

.marketing-proof-card p {
  margin: 0;
  color: var(--marketing-muted);
  line-height: 1.58;
}

.marketing-icon {
  width: 48px;
  height: 48px;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--marketing-border-soft);
  border-radius: 13px;
  background: var(--marketing-blue-soft);
  color: var(--marketing-blue);
}

.marketing-icon svg {
  width: 27px;
  height: 27px;
  display: block;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.marketing-icon--flaticon {
  overflow: hidden;
}

.marketing-icon--flaticon img {
  width: 29px;
  height: 29px;
  display: block;
  object-fit: contain;
  filter: invert(29%) sepia(91%) saturate(2290%) hue-rotate(210deg) brightness(86%) contrast(101%);
}

.marketing-icon--blue { background: #edf4ff; }
.marketing-icon--coral { background: #fff1f0; }
.marketing-icon--yellow { background: #fff8e8; }

.marketing-signal-preview {
  padding: clamp(20px, 3vw, 28px);
  display: grid;
  gap: 14px;
}

.marketing-signal-preview__header,
.marketing-signal-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.marketing-signal-preview__header h2,
.marketing-signal-preview__header h3 {
  margin: 0;
  color: var(--marketing-ink);
  font-size: 1rem;
  line-height: 1.3;
}

.marketing-signal-list {
  display: grid;
  gap: 8px;
}

.marketing-signal-row {
  min-height: 62px;
  padding: 10px 12px;
  border: 1px solid var(--marketing-border-soft);
  border-radius: var(--marketing-radius-small);
  background: #fbfcff;
}

.marketing-signal-row__main {
  min-width: 0;
  flex: 1;
  display: grid;
  gap: 7px;
}

.marketing-signal-row__label {
  color: var(--marketing-ink);
  font-size: .84rem;
  font-weight: 800;
  line-height: 1.25;
}

.marketing-signal-bar {
  width: min(150px, 100%);
  height: 6px;
  overflow: hidden;
  border-radius: 999px;
  background: #e5ebf5;
}

.marketing-signal-bar span {
  width: var(--signal-width, 50%);
  height: 100%;
  display: block;
  border-radius: inherit;
  background: var(--signal-color, var(--marketing-blue));
}

.marketing-status {
  flex: 0 0 auto;
  padding: 5px 8px;
  border: 1px solid var(--marketing-border-soft);
  border-radius: 8px;
  background: var(--marketing-blue-soft);
  color: var(--marketing-blue-dark);
  font-size: .7rem;
  font-weight: 800;
  line-height: 1.2;
  white-space: nowrap;
}

.marketing-status--review {
  border-color: #f0c6c9;
  background: #fff2f3;
  color: #b32f40;
}

.marketing-status--building {
  border-color: #efd9a6;
  background: #fff8e8;
  color: #8a5a00;
}

.marketing-status--promising {
  border-color: #b8ddce;
  background: #edf9f4;
  color: #126c4a;
}

.marketing-recommendation {
  padding: 16px;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  border: 1px solid var(--marketing-blue);
  border-radius: var(--marketing-radius-small);
  background: #f8faff;
}

.marketing-recommendation strong,
.marketing-recommendation small {
  display: block;
}

.marketing-recommendation strong {
  color: var(--marketing-ink);
  font-size: .88rem;
  line-height: 1.3;
}

.marketing-recommendation small {
  margin-top: 3px;
  color: var(--marketing-muted);
  font-size: .74rem;
  line-height: 1.35;
}

.marketing-step-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  overflow: hidden;
}

.marketing-step {
  min-width: 0;
  padding: clamp(20px, 3vw, 28px);
  display: grid;
  grid-template-columns: 38px 48px minmax(0, 1fr);
  gap: 13px;
  align-items: start;
}

.marketing-step__icon {
  margin-top: -7px;
}

.marketing-step + .marketing-step {
  border-left: 1px solid var(--marketing-border-soft);
}

.marketing-step__number {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--marketing-blue);
  color: #fff;
  font-size: .8rem;
  font-weight: 800;
}

.marketing-step h3,
.marketing-step p {
  margin: 0;
}

.marketing-step h3 {
  color: var(--marketing-ink);
  font-size: .95rem;
  line-height: 1.3;
}

.marketing-step p {
  margin-top: 5px;
  color: var(--marketing-muted);
  font-size: .84rem;
  line-height: 1.48;
}

.marketing-trust-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  overflow: hidden;
}

.marketing-trust-item {
  min-width: 0;
  padding: 18px 22px;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
}

.marketing-trust-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  background: transparent;
  border: 0;
  box-shadow: none;
}

.marketing-trust-icon img {
  width: 38px;
  height: 38px;
  display: block;
  object-fit: contain;
  filter: invert(29%) sepia(91%) saturate(2290%) hue-rotate(210deg) brightness(86%) contrast(101%);
  transform-origin: 50% 70%;
}

.marketing-trust-item + .marketing-trust-item {
  border-left: 1px solid var(--marketing-border-soft);
}

.marketing-trust-item strong,
.marketing-trust-item small {
  display: block;
}

@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .marketing-trust-item:hover .marketing-trust-icon img {
    animation: marketing-trust-icon-hover .58s cubic-bezier(.22, .8, .3, 1);
  }
}

@keyframes marketing-trust-icon-hover {
  0%, 100% { transform: translateY(0) rotate(0deg) scale(1); }
  38% { transform: translateY(-5px) rotate(-4deg) scale(1.07); }
  68% { transform: translateY(-1px) rotate(3deg) scale(1.03); }
}

.marketing-trust-item strong {
  color: var(--marketing-ink);
  font-size: .86rem;
  line-height: 1.3;
}

.marketing-trust-item small {
  margin-top: 3px;
  color: var(--marketing-muted);
  font-size: .75rem;
  line-height: 1.4;
}

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

@media (max-width: 900px) {
  .marketing-proof-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .marketing-proof-grid > :last-child:nth-child(odd) {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  .marketing-page {
    --marketing-section-space: clamp(54px, 14vw, 76px);
  }

  .marketing-container {
    width: min(var(--marketing-container), calc(100% - 40px));
  }

  .marketing-heading {
    font-size: clamp(2rem, 11vw, 3rem);
  }

  .marketing-actions,
  .marketing-proof-grid,
  .marketing-step-strip,
  .marketing-trust-strip {
    grid-template-columns: minmax(0, 1fr);
  }

  .marketing-actions {
    display: grid;
  }

  .marketing-button {
    width: 100%;
  }

  .marketing-proof-grid > :last-child:nth-child(odd) {
    grid-column: auto;
  }

  .marketing-step + .marketing-step,
  .marketing-trust-item + .marketing-trust-item {
    border-top: 1px solid var(--marketing-border-soft);
    border-left: 0;
  }

  .marketing-recommendation {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .marketing-recommendation > :last-child {
    grid-column: 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .marketing-page .marketing-button,
  .marketing-page .marketing-card.is-interactive {
    transition: none;
  }
}