/* =================================================================
   BuildFlow — main stylesheet
   Design tokens are derived from assets/logo/buildflow-logo.png:
   ink black, construction red, warm paper neutrals.
   Layout is mobile-first; breakpoints at 640 / 768 / 1024 / 1280px.
   ================================================================= */

:root {
  /* Colour tokens (from logo) */
  --color-ink: #161616;
  --color-ink-soft: #5c5752;
  --color-red: #cc1b1b;
  --color-red-dark: #9e1414;
  --color-red-light: #ff6b6b; /* AA-safe red for small text on dark/red backgrounds */
  --color-red-tint: #fbeaea;
  --color-paper: #faf8f5;
  --color-white: #ffffff;
  --color-line: #e7e2dd;
  --color-mist: rgba(250, 248, 245, 0.78); /* secondary text on dark/brand sections */

  /* Typography */
  --font-display: "Big Shoulders Display", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;

  /* Type scale */
  --text-xs: 0.8125rem;
  --text-sm: 0.9375rem;
  --text-base: 1rem;
  --text-md: 1.125rem;
  --text-lg: 1.375rem;
  --text-xl: clamp(1.75rem, 1.55rem + 1vw, 2.5rem);
  --text-2xl: clamp(2.5rem, 1.6rem + 4.5vw, 4.75rem);

  /* Spacing scale (4px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;

  /* Layout */
  --container-max: 75rem;
  --container-pad: clamp(1.25rem, 4vw, 3rem);

  /* Radii & shadows */
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 20px;
  --radius-full: 999px;
  --shadow-card: 0 24px 48px -24px rgba(22, 16, 12, 0.4), 0 4px 16px -4px rgba(22, 16, 12, 0.12);
  --shadow-soft: 0 2px 10px rgba(22, 16, 12, 0.06);

  /* Motion */
  --ease-stamp: cubic-bezier(0.18, 1.6, 0.4, 1);
  --transition-base: 180ms ease;
}

/* -----------------------------------------------------------------
   Base
   ----------------------------------------------------------------- */

html {
  scroll-behavior: smooth;
  scroll-padding-top: 4.5rem;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-ink);
  background-color: var(--color-white);
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.05;
  color: var(--color-ink);
}

h1 {
  font-size: var(--text-2xl);
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

h2 {
  font-size: var(--text-xl);
}

h3 {
  font-size: var(--text-md);
  font-weight: 700;
}

p {
  color: var(--color-ink-soft);
  max-width: 60ch;
}

p + p {
  margin-top: var(--space-4);
}

strong {
  color: var(--color-ink);
}

a {
  color: var(--color-red);
}

a:hover {
  color: var(--color-red-dark);
}

:focus-visible {
  outline: 3px solid var(--color-red);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* -----------------------------------------------------------------
   Layout utilities
   ----------------------------------------------------------------- */

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

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

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -120%;
  z-index: 100;
  background-color: var(--color-ink);
  color: var(--color-white);
  font-weight: 600;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  transition: top var(--transition-base);
}

.skip-link:focus {
  top: var(--space-4);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-red);
  margin-bottom: var(--space-3);
}

.eyebrow--light {
  color: var(--color-white);
}

.section {
  padding-block: var(--space-9);
}

.section--paper {
  background-color: var(--color-paper);
}

.section--ink {
  background-color: var(--color-ink);
}

.section--ink h2,
.section--ink h3 {
  color: var(--color-white);
}

.section--ink p {
  color: var(--color-mist);
}

.section--brand {
  background-color: var(--color-red);
}

.section--brand h2 {
  color: var(--color-white);
}

.section--brand p {
  color: var(--color-mist);
}

.section-head {
  max-width: 40rem;
  margin-bottom: var(--space-7);
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.section-head--center p {
  margin-inline: auto;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.95rem 1.85rem;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  transition: transform var(--transition-base), background-color var(--transition-base),
    color var(--transition-base), border-color var(--transition-base);
}

.btn--primary {
  background-color: var(--color-red);
  color: var(--color-white);
}

.btn--primary:hover {
  background-color: var(--color-red-dark);
  color: var(--color-white);
}

.btn--on-light {
  background-color: var(--color-ink);
  color: var(--color-white);
}

.btn--on-light:hover {
  background-color: var(--color-red);
}

.btn--block {
  width: 100%;
}

.btn:active {
  transform: translateY(1px);
}

/* -----------------------------------------------------------------
   Header / nav
   ----------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--color-paper);
  border-bottom: 2px solid var(--color-ink);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-4);
  padding-block: var(--space-3);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.site-header__brand img {
  width: 40px;
  height: 40px;
}

.site-header__wordmark {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.site-header__wordmark .build {
  color: var(--color-ink);
}

.site-header__wordmark .flow {
  color: var(--color-red);
}

.site-header__cta {
  order: 2;
}

.nav-toggle {
  order: 3;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 2px solid var(--color-ink);
  border-radius: var(--radius-sm);
}

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle__bars span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-ink);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.site-nav {
  order: 4;
  flex-basis: 100%;
  border-top: 1px solid var(--color-line);
  padding-top: var(--space-4);
}

.site-nav[hidden] {
  display: none;
}

.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  font-weight: 600;
}

.site-nav__list a {
  display: inline-block;
  padding: var(--space-1) 0;
  color: var(--color-ink);
}

.site-nav__list a:hover {
  color: var(--color-red);
}

@media (min-width: 768px) {
  .site-header__inner {
    flex-wrap: nowrap;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    order: 2;
    flex-basis: auto;
    border-top: none;
    padding-top: 0;
    margin-right: auto;
    margin-left: var(--space-5);
  }

  .site-nav[hidden] {
    display: block;
  }

  .site-nav__list {
    flex-direction: row;
    gap: var(--space-4);
  }

  .site-nav__list a {
    white-space: nowrap;
  }

  .site-header__cta {
    order: 3;
  }
}

@media (min-width: 1024px) {
  .site-nav {
    margin-left: var(--space-7);
  }

  .site-nav__list {
    gap: var(--space-6);
  }
}

/* -----------------------------------------------------------------
   Hero
   ----------------------------------------------------------------- */

.hero {
  position: relative;
  background-color: var(--color-ink);
  padding-block: var(--space-8) var(--space-9);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 85%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.9), transparent 85%);
}

.hero__inner {
  position: relative;
  display: grid;
  gap: var(--space-8);
  align-items: center;
}

.hero h1,
.hero h2 {
  color: var(--color-white);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  margin-bottom: var(--space-4);
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  border-radius: 50%;
  background-color: var(--color-red);
  animation: badge-pulse 2s ease-in-out infinite;
}

@keyframes badge-pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.4;
    transform: scale(0.7);
  }
}

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

.hero__title {
  margin-bottom: var(--space-5);
}

.hero__title-accent {
  display: block;
  color: var(--color-red);
}

.hero__lead {
  color: var(--color-mist);
  font-size: var(--text-md);
  max-width: 38ch;
}

.hero__actions {
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
}

.hero__microcopy {
  color: var(--color-mist);
  font-size: var(--text-sm);
  margin: 0;
}

.hero__visual {
  display: flex;
  justify-content: center;
}

@media (min-width: 1024px) {
  .hero__inner {
    grid-template-columns: 1.05fr 0.95fr;
    gap: var(--space-9);
  }

  .hero__visual {
    justify-content: flex-end;
  }
}

/* Signature element: tilted invoice card with a stamping "PAID" mark */

.invoice-card {
  position: relative;
  width: min(100%, 380px);
  background-color: var(--color-white);
  color: var(--color-ink);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: var(--space-6);
  transform: rotate(-3deg);
  animation: card-in 700ms var(--ease-stamp) both;
  animation-delay: 150ms;
}

.invoice-card__header {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-4);
  border-bottom: 2px solid var(--color-ink);
}

.invoice-card__id {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.invoice-card__job {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.invoice-card__lines {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.invoice-card__lines li {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.invoice-card__total {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  padding-top: var(--space-3);
  border-top: 2px solid var(--color-ink);
}

.invoice-card__stamp {
  position: absolute;
  top: 62%;
  right: 0;
  transform: translate(20%, -50%) rotate(-15deg);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-red);
  background-color: rgba(255, 255, 255, 0.9);
  border: 4px solid var(--color-red);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  animation: stamp-in 650ms var(--ease-stamp) both;
  animation-delay: 750ms;
}

@keyframes card-in {
  from {
    opacity: 0;
    transform: rotate(-3deg) translateY(32px);
  }
  to {
    opacity: 1;
    transform: rotate(-3deg) translateY(0);
  }
}

@keyframes stamp-in {
  0% {
    opacity: 0;
    transform: translate(20%, -50%) rotate(-34deg) scale(2.4);
  }
  55% {
    opacity: 1;
    transform: translate(20%, -50%) rotate(-12deg) scale(0.9);
  }
  75% {
    transform: translate(20%, -50%) rotate(-18deg) scale(1.05);
  }
  100% {
    opacity: 1;
    transform: translate(20%, -50%) rotate(-15deg) scale(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .invoice-card,
  .invoice-card__stamp {
    animation: fade-in 400ms ease both;
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* -----------------------------------------------------------------
   The problem
   ----------------------------------------------------------------- */

.problem__grid {
  display: grid;
  gap: var(--space-7);
}

@media (min-width: 768px) {
  .problem__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-5);
  }
}

.note-card {
  position: relative;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-soft);
  padding: var(--space-6) var(--space-5) var(--space-5);
}

.note-card::before {
  content: "";
  position: absolute;
  top: -10px;
  left: var(--space-5);
  width: 18px;
  height: 18px;
  background-color: var(--color-red);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-soft);
}

.note-card--rotate-1 {
  transform: rotate(-1.25deg);
}

.note-card--rotate-2 {
  transform: rotate(1deg);
}

.note-card--rotate-3 {
  transform: rotate(-0.5deg);
}

.note-card h3 {
  margin-bottom: var(--space-3);
}

/* -----------------------------------------------------------------
   How it works
   ----------------------------------------------------------------- */

.steps {
  display: grid;
  gap: var(--space-7);
}

@media (min-width: 768px) {
  .steps {
    position: relative;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }

  .steps::before {
    content: "";
    position: absolute;
    top: 28px;
    left: 14%;
    right: 14%;
    border-top: 2px dashed var(--color-line);
  }
}

.steps__item {
  position: relative;
  text-align: center;
}

.steps__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: var(--space-4);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  color: var(--color-red);
  background-color: var(--color-white);
  border: 3px solid var(--color-red);
  border-radius: var(--radius-full);
  transform: rotate(-6deg);
}

.steps__item h3 {
  margin-bottom: var(--space-2);
}

/* -----------------------------------------------------------------
   Features
   ----------------------------------------------------------------- */

.features__grid {
  display: grid;
  gap: var(--space-5);
}

@media (min-width: 640px) {
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.feature-card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  padding: var(--space-6) var(--space-5);
}

.feature-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-4);
  background-color: var(--color-red-tint);
  border-radius: var(--radius-sm);
  color: var(--color-red);
}

.feature-card__icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-card h3 {
  margin-bottom: var(--space-2);
}

/* -----------------------------------------------------------------
   Product preview
   ----------------------------------------------------------------- */

.preview__inner {
  display: grid;
  gap: var(--space-8);
  align-items: center;
}

.preview__content p {
  margin-top: var(--space-4);
}

.preview__visual {
  position: relative;
  width: min(100%, 320px);
  margin-inline: auto;
  padding-block: var(--space-4);
}

.app-preview {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transform: rotate(2deg);
}

.app-preview__tag {
  position: absolute;
  top: var(--space-5);
  right: -10px;
  max-width: 9rem;
  background-color: var(--color-red);
  color: var(--color-white);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-sm);
  text-transform: uppercase;
  line-height: 1.15;
  letter-spacing: 0.02em;
  text-align: center;
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  transform: rotate(-7deg);
}

@media (min-width: 1024px) {
  .preview__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-9);
  }

  .preview__visual {
    order: -1;
  }
}

/* -----------------------------------------------------------------
   Why BuildFlow
   ----------------------------------------------------------------- */

.why {
  display: grid;
  gap: var(--space-6);
  align-items: start;
}

@media (min-width: 1024px) {
  .why {
    grid-template-columns: 1.4fr 1fr;
    gap: var(--space-8);
  }
}

.why__content h2 {
  margin-bottom: var(--space-4);
}

.trust-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  background-color: var(--color-paper);
  border: 2px solid var(--color-ink);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}

.trust-list li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 600;
  color: var(--color-ink);
}

.trust-list .check {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  padding: 3px;
  border: 2px solid var(--color-red);
  border-radius: var(--radius-sm);
  fill: none;
  stroke: var(--color-red);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* -----------------------------------------------------------------
   Waitlist (final CTA)
   ----------------------------------------------------------------- */

.waitlist__inner {
  display: grid;
  gap: var(--space-7);
  align-items: center;
}

@media (min-width: 1024px) {
  .waitlist__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-9);
  }
}

.waitlist-progress {
  margin-top: var(--space-6);
}

.waitlist-progress__track {
  height: 10px;
  background-color: rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.waitlist-progress__fill {
  width: 74%;
  height: 100%;
  background-color: var(--color-white);
  border-radius: var(--radius-full);
}

.waitlist-progress__label {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
}

.waitlist-progress__label strong {
  font-family: var(--font-display);
  letter-spacing: 0.02em;
  color: var(--color-white);
}

.waitlist-form {
  background-color: var(--color-white);
  color: var(--color-ink);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--space-6);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.form-field label {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-ink);
}

.form-field input,
.form-field select {
  padding: 0.85rem 1rem;
  font-size: var(--text-base);
  color: var(--color-ink);
  background-color: var(--color-white);
  border: 2px solid var(--color-line);
  border-radius: var(--radius-sm);
}

.form-field select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='9' viewBox='0 0 14 9'%3E%3Cpath fill='none' stroke='%23161616' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' d='M1 1l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.form-field input:focus-visible,
.form-field select:focus-visible {
  border-color: var(--color-red);
}

.section--brand .waitlist-form__privacy {
  margin-top: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
  max-width: none;
}

.waitlist-form__status {
  margin-top: var(--space-3);
  font-weight: 600;
  font-size: var(--text-sm);
  min-height: 1.2em;
}

.section--brand .waitlist-form__status {
  color: var(--color-ink-soft);
}

.waitlist-form__status[data-state="success"] {
  color: var(--color-red);
}

.waitlist-form__status[data-state="error"] {
  color: var(--color-red);
}

.waitlist-form__noscript {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background-color: var(--color-red-tint);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  max-width: none;
}

.section--brand .waitlist-form__noscript {
  color: var(--color-ink);
}

.waitlist-form[hidden] {
  display: none;
}

.waitlist-form__success {
  background-color: var(--color-white);
  color: var(--color-ink);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--space-7) var(--space-6);
  text-align: center;
}

.waitlist-form__success[hidden] {
  display: none;
}

.section--brand .waitlist-form__success p {
  color: var(--color-ink-soft);
}

.waitlist-form__success-stamp {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-red);
  border: 4px solid var(--color-red);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-5);
  transform: rotate(-4deg);
  margin-bottom: var(--space-4);
}

/* -----------------------------------------------------------------
   FAQ
   ----------------------------------------------------------------- */

.faq-list {
  max-width: 44rem;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  font-weight: 700;
  font-size: var(--text-md);
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1;
  color: var(--color-red);
  border: 2px solid var(--color-red);
  border-radius: var(--radius-sm);
}

.faq-item[open] summary::after {
  content: "\2013";
}

.faq-item p {
  margin-top: var(--space-4);
  max-width: none;
}

/* -----------------------------------------------------------------
   Footer
   ----------------------------------------------------------------- */

.site-footer {
  background-color: var(--color-paper);
  border-top: 2px solid var(--color-ink);
  padding-block: var(--space-7);
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

@media (min-width: 768px) {
  .site-footer__inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }
}

.site-footer__wordmark {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-2);
}

.site-footer__wordmark .build {
  color: var(--color-ink);
}

.site-footer__wordmark .flow {
  color: var(--color-red);
}

.site-footer__tagline {
  font-size: var(--text-sm);
  margin: 0;
}

.site-footer__meta {
  font-size: var(--text-sm);
}

.site-footer__meta p {
  margin: 0;
}

.site-footer__meta p + p {
  margin-top: var(--space-1);
}

@media (min-width: 768px) {
  .site-footer__meta {
    text-align: right;
  }
}

/* -----------------------------------------------------------------
   Scroll reveal (progressive enhancement via IntersectionObserver)
   ----------------------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms ease, transform 600ms ease;
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}