/* ==========================================================================
   FULLSTACK — Product Studio page
   Shared components live in components.css; this file holds only what is
   unique to /product-studio/.
   ========================================================================== */

/* ==========================================================================
   01. HERO
   ========================================================================== */

/* Measured: "actually use." is the widest line at 7.99em, so the cap is
   100/7.99 ≈ 12.5cqw. 12cqw leaves margin. Four short lines means the column
   can stay close to the homepage split. */
.fs-hero--studio .fs-hero__title { font-size: min(var(--fs-text-d1), 12cqw); }

.fs-pipeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  width: 100%;
  max-width: 22rem;
}

.fs-pipeline__step {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--fs-space-4);
  padding: var(--fs-space-4) var(--fs-space-5);
  border: var(--fs-border-width) solid var(--fs-dark-border);
  font-size: 0.8125rem;
  font-weight: var(--fs-weight-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fs-text-on-dark);
}

/* A downward connector between steps, drawn rather than marked up, anchored
   to the gap with explicit coordinates. */
.fs-pipeline__step { position: relative; }
.fs-pipeline__step + .fs-pipeline__step { margin-top: 1.75rem; }

.fs-pipeline__step + .fs-pipeline__step::before {
  content: '↓';
  position: absolute;
  top: -0.875rem;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.875rem;
  font-weight: var(--fs-weight-regular);
  line-height: 1;
  color: var(--fs-text-on-dark-muted);
}

.fs-pipeline__step--accent {
  background-color: var(--fs-warm-white);
  color: var(--fs-graphite);
  border-color: var(--fs-warm-white);
}

.fs-pipeline__note {
  font-family: var(--fs-font-mono);
  font-size: var(--fs-text-mono);
  font-weight: var(--fs-weight-regular);
  letter-spacing: 0.1em;
  text-transform: none;
  color: var(--fs-text-on-dark-muted);
}

@media (max-width: 1200px) {
  .fs-pipeline { max-width: none; }
}

/* ==========================================================================
   02. THE CHALLENGE
   ========================================================================== */

.fs-risks { margin-top: var(--fs-section-gap); }

.fs-risk {
  display: flex;
  flex-direction: column;
  gap: var(--fs-space-2);
  padding: var(--fs-space-6) var(--fs-space-5) var(--fs-space-8);
}

.fs-risk__number { color: var(--fs-fg-muted); }

.fs-risk__title {
  font-size: var(--fs-text-h4);
  font-weight: var(--fs-weight-extrabold);
  letter-spacing: var(--fs-tracking-tight);
  text-transform: uppercase;
  line-height: 1.25;
}

.fs-risk__text {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--fs-fg-body);
}

/* ==========================================================================
   03. STARTING POINTS
   ========================================================================== */

.fs-starts__grid { margin-top: var(--fs-section-gap); }

.fs-start {
  gap: var(--fs-space-3);
  background-color: transparent;
}

.fs-start__head {
  display: flex;
  flex-direction: column;
  gap: var(--fs-space-4);
}

.fs-start__number { color: var(--fs-fg-muted); }

.fs-start__title {
  font-size: var(--fs-text-h4);
  font-weight: var(--fs-weight-extrabold);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1.2;
}

.fs-start__text {
  font-size: 0.90625rem;
  line-height: 1.6;
  color: var(--fs-fg-body);
}

.fs-start__cta { margin-top: auto; padding-top: var(--fs-space-5); }

/* ==========================================================================
   04. DISCOVERY
   ========================================================================== */

.fs-discovery__title { margin-top: var(--fs-space-6); text-transform: uppercase; }
.fs-discovery__text { margin-top: var(--fs-space-5); }

.fs-deliverables {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--fs-space-6);
  margin-top: var(--fs-space-8);
}

.fs-deliverables__list {
  font-size: 0.9375rem;
  font-weight: var(--fs-weight-semibold);
  line-height: 2;
  color: var(--fs-fg-body);
}

.fs-outcome {
  margin-top: var(--fs-space-8);
  padding-left: var(--fs-space-6);
  border-left: var(--fs-border-emphasis) solid var(--fs-accent);
}

.fs-outcome__title {
  font-size: var(--fs-text-h3);
  font-weight: var(--fs-weight-extrabold);
  letter-spacing: var(--fs-tracking-tight);
  text-transform: uppercase;
}

.fs-outcome__text {
  margin-top: var(--fs-space-2);
  font-size: var(--fs-text-body);
  color: var(--fs-fg-body);
}

.fs-discovery__cta { margin-top: var(--fs-space-8); }

/* The funnel narrows toward the MVP, which is the point of the diagram. */
.fs-funnel {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.fs-funnel__step {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--fs-space-3);
  width: 100%;
  padding: var(--fs-space-4);
  border: var(--fs-border-width) solid var(--fs-border);
  font-size: 0.875rem;
  font-weight: var(--fs-weight-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: center;
}

.fs-funnel__step:nth-child(2) { width: 88%; }
.fs-funnel__step:nth-child(3) { width: 76%; }
.fs-funnel__step:nth-child(4) { width: 64%; }
.fs-funnel__step:nth-child(5) { width: 88%; }

.fs-funnel__step { position: relative; }
.fs-funnel__step + .fs-funnel__step { margin-top: 1.75rem; }

.fs-funnel__step + .fs-funnel__step::before {
  content: '↓';
  position: absolute;
  top: -0.875rem;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.875rem;
  font-weight: var(--fs-weight-regular);
  line-height: 1;
  color: var(--fs-fg-muted);
}

.fs-funnel__step--key {
  background-color: var(--fs-graphite);
  color: var(--fs-warm-white);
  border-color: var(--fs-graphite);
}

.fs-accent-ink { color: var(--fs-accent-text); }

@media (max-width: 560px) {
  .fs-deliverables { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .fs-discovery__cta .fs-btn { width: 100%; }
  .fs-funnel__step,
  .fs-funnel__step:nth-child(n) { width: 100%; }
}

/* ==========================================================================
   05. PRODUCT DESIGN ARTEFACTS
   Abstract design-artefact tiles, drawn from tokens rather than screenshots.
   ========================================================================== */

.fs-artefacts {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--fs-grid-gap);
  margin-top: var(--fs-section-gap);
}

.fs-artefact {
  display: flex;
  flex-direction: column;
  gap: var(--fs-space-4);
  padding: var(--fs-space-5);
  background-color: var(--fs-light-bg);
  border: var(--fs-border-width) solid var(--fs-border);
}

.fs-artefact__label { letter-spacing: 0.14em; color: var(--fs-fg-muted); }

.fs-artefact__body {
  position: relative;
  flex: 1;
  min-height: 7.5rem;
  background-color: var(--fs-light-bg-alt);
  overflow: hidden;
}

/* Each tile hints at its artefact with the design system's own geometry. */
.fs-artefact--flow .fs-artefact__body {
  background-image:
    linear-gradient(var(--fs-light-border) 2px, transparent 2px),
    linear-gradient(90deg, var(--fs-light-border) 2px, transparent 2px);
  background-size: 33% 33%;
}

.fs-artefact--wire .fs-artefact__body {
  background-image:
    linear-gradient(var(--fs-light-border) 0 0),
    linear-gradient(var(--fs-light-border) 0 0),
    linear-gradient(var(--fs-light-border) 0 0);
  background-repeat: no-repeat;
  background-size: 100% 18%, 45% 44%, 45% 44%;
  background-position: 0 0, 0 100%, 100% 100%;
}

.fs-artefact--ui .fs-artefact__body {
  background-image:
    linear-gradient(var(--fs-graphite) 0 0),
    linear-gradient(var(--fs-accent) 0 0);
  background-repeat: no-repeat;
  background-size: 60% 16%, 30% 10%;
  background-position: 8% 14%, 8% 78%;
}

.fs-artefact--system .fs-artefact__body {
  background-image:
    linear-gradient(var(--fs-graphite) 0 0),
    linear-gradient(var(--fs-accent) 0 0),
    linear-gradient(var(--fs-light-border) 0 0);
  background-repeat: no-repeat;
  background-size: 22% 22%, 22% 22%, 22% 22%;
  background-position: 10% 20%, 42% 20%, 74% 20%;
}

.fs-artefact--proto .fs-artefact__body {
  background-image: repeating-linear-gradient(
    90deg,
    var(--fs-light-border) 0 12%,
    transparent 12% 20%
  );
  background-size: 100% 30%;
  background-repeat: no-repeat;
  background-position: 0 60%;
}

.fs-design__note {
  margin-top: var(--fs-section-gap);
  max-width: 52rem;
  letter-spacing: 0.06em;
  color: var(--fs-fg-muted);
}

@media (max-width: 1023px) {
  .fs-artefacts { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .fs-artefacts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ==========================================================================
   06. BUILD LAYERS
   ========================================================================== */

.fs-layers { margin-top: var(--fs-section-gap); }

.fs-layer { padding: var(--fs-space-6) var(--fs-space-5); }

.fs-layer__title {
  font-size: var(--fs-text-h4);
  font-weight: var(--fs-weight-extrabold);
  letter-spacing: var(--fs-tracking-tight);
  text-transform: uppercase;
}

.fs-layer__text {
  margin: var(--fs-space-2) 0 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--fs-fg-body);
}

/* ==========================================================================
   08. AI
   ========================================================================== */

.fs-ai__title { margin-top: var(--fs-space-6); text-transform: uppercase; }
.fs-ai__text { margin-top: var(--fs-space-5); }

.fs-ai__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--fs-divider);
  border: var(--fs-border-width) solid var(--fs-divider);
}

.fs-ai__item {
  padding: var(--fs-space-5);
  background-color: var(--fs-bg);
  font-size: 0.9375rem;
  font-weight: var(--fs-weight-semibold);
}

@media (max-width: 560px) {
  .fs-ai__list { grid-template-columns: minmax(0, 1fr); }
}

/* ==========================================================================
   09. LAUNCH
   ========================================================================== */

.fs-launch { overflow: hidden; }

.fs-launch__flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 0.8fr) auto minmax(0, 1fr);
  gap: var(--fs-space-5);
  align-items: center;
  margin-top: var(--fs-section-gap);
}

.fs-launch__panel {
  padding: var(--fs-space-6);
  border: var(--fs-border-width) solid var(--fs-border);
}

.fs-launch__panel--moment {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--fs-space-4);
  background-color: var(--fs-dark-bg-raised);
  border-color: var(--fs-border-strong);
  text-align: center;
}

.fs-launch__label { letter-spacing: var(--fs-tracking-mono); color: var(--fs-fg-muted); }

.fs-launch__items {
  margin-top: var(--fs-space-4);
  font-size: 0.9375rem;
  font-weight: var(--fs-weight-semibold);
  line-height: 1.9;
  color: var(--fs-fg-body);
}

.fs-launch__moment {
  letter-spacing: var(--fs-tracking-mono);
  color: var(--fs-accent);
}

.fs-launch__arrow { font-size: 1.25rem; color: var(--fs-fg-muted); }

@media (max-width: 1023px) {
  .fs-launch__flow { grid-template-columns: minmax(0, 1fr); }
  .fs-launch__arrow { text-align: center; font-size: 0; line-height: 1; }
  .fs-launch__arrow::before { content: '↓'; font-size: 1.25rem; }
}

/* ==========================================================================
   12. ENGAGEMENT MODELS
   ========================================================================== */

.fs-engagement__grid { margin-top: var(--fs-section-gap); }

.fs-model { gap: var(--fs-space-3); background-color: transparent; }

.fs-model__title {
  margin-top: var(--fs-space-5);
  font-size: var(--fs-text-h3);
  font-weight: var(--fs-weight-extrabold);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.fs-model__text {
  font-size: 0.90625rem;
  line-height: 1.6;
  color: var(--fs-fg-muted);
}

.fs-model__includes {
  margin-top: var(--fs-space-4);
  padding-top: var(--fs-space-4);
  border-top: var(--fs-border-width) solid var(--fs-border);
  font-size: 0.9375rem;
  font-weight: var(--fs-weight-semibold);
  line-height: 1.9;
  color: var(--fs-fg-body);
}

.fs-model__cta { margin-top: auto; padding-top: var(--fs-space-5); }