/* ==========================================================================
   THE BRIEF — four-step request form on /contact
   01 what you need · 02 which package · 03 the project · 04 contact
   No price is shown anywhere in the form — step 02 links out to the chosen
   package's own section on the service page instead. Markup:
   scripts/fragments/brief-*.html · logic: brief.js
   ========================================================================== */

.brief {
  padding-block: clamp(50px, 8vh, 90px) clamp(90px, 14vh, 170px);
}

.brief__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.62fr) minmax(0, 1.38fr);
  gap: clamp(32px, 5vw, 90px);
  align-items: start;
}

/* --------------------------------------------------------------------------
   RAIL — where you are in the flow
   -------------------------------------------------------------------------- */
.brief__rail {
  position: sticky;
  top: clamp(100px, 15vh, 150px);
}

.brief__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(28px, 3.2vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.brief__counter {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-wide);
  color: var(--signal);
}

.brief__steps {
  margin-top: var(--space-md);
  display: flex;
  flex-direction: column;
}

/* Two columns: number + label on the left, the chosen answer on the right. */
.brief__steps li {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 14px;
  padding-block: 13px;
  border-top: 1px solid var(--color-border);
  font-size: var(--text-small);
  color: var(--color-text-muted);
  transition: color var(--dur-fast) var(--ease-smooth),
              padding-left var(--dur-fast) var(--ease-out-quart);
}

.brief__step-num {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  color: var(--color-text-muted);
  transition: color var(--dur-fast) var(--ease-smooth);
}

/* The answer carried over from the service page. Empty until something is
   chosen, so the rail stays quiet on a cold start. */
.brief__step-value {
  grid-column: 3;
  font-style: normal;
  font-family: var(--font-display);
  font-size: var(--text-small);
  font-weight: 500;
  text-align: right;
  color: var(--signal);
  opacity: 0;
  transform: translate3d(0, 3px, 0);
  transition: opacity var(--dur-fast) var(--ease-smooth),
              transform var(--dur-fast) var(--ease-out-quart);
}

.brief__step-value.is-set { opacity: 1; transform: none; }

.brief__steps li.is-done { color: var(--color-text-secondary); }
.brief__steps li.is-done .brief__step-num { color: var(--signal); }

.brief__steps li.is-active {
  color: var(--color-text-primary);
  padding-left: 8px;
}

.brief__steps li.is-active .brief__step-num { color: var(--signal); }

.brief__promise {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.brief__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--signal);
  animation: brief-alive 2.8s var(--ease-smooth) infinite;
}

@keyframes brief-alive {
  0%   { box-shadow: 0 0 0 0 var(--color-glow); opacity: 1; }
  70%  { box-shadow: 0 0 0 9px rgba(250, 250, 250, 0); opacity: 0.75; }
  100% { box-shadow: 0 0 0 0 rgba(250, 250, 250, 0); opacity: 1; }
}

/* --------------------------------------------------------------------------
   STEPS
   -------------------------------------------------------------------------- */
.brief__form { position: relative; }

.brief__step {
  border: 0;
  padding: 0;
  margin: 0;
  animation: brief-step-in 0.55s var(--ease-out-expo) both;
}

@keyframes brief-step-in {
  from { opacity: 0; transform: translate3d(0, 14px, 0); }
  to   { opacity: 1; transform: none; }
}

.brief__q {
  padding: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(24px, 2.8vw, 42px);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.brief__q--sm {
  display: block;
  font-size: var(--text-subhead);
  letter-spacing: -0.02em;
}

.brief__hint {
  margin-top: 10px;
  max-width: 58ch;
  font-size: var(--text-small);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   CHIPS — services and budget bands
   -------------------------------------------------------------------------- */
.brief__chips {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 12px;
  margin-top: var(--space-md);
}

.brief-chip {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 17px 20px;
  text-align: left;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--dur-fast) var(--ease-smooth),
              background var(--dur-fast) var(--ease-smooth),
              transform var(--dur-fast) var(--ease-out-quart);
}

.brief-chip:hover { border-color: var(--color-border-strong); transform: translate3d(0, -2px, 0); }
.brief-chip:active { transform: scale(0.985); }

.brief-chip.is-active {
  border-color: var(--signal);
  background: var(--signal-veil);
}

/* "Not sure yet" is a real answer, so it gets a real chip — dashed, not hidden
   in a dropdown at the bottom. */
.brief-chip--soft {
  border-style: dashed;
  grid-column: 1 / -1;
}

.brief-chip__name {
  font-family: var(--font-display);
  font-size: var(--text-body);
  font-weight: 500;
}

.brief-chip__hint {
  font-size: var(--text-caption);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   TIERS
   -------------------------------------------------------------------------- */
.brief__tiers {
  display: grid;
  /* Fixed 3 columns, not auto-fit: there are always exactly 3 tiers, and the
     dashed "unknown" chip below them spans grid-column: 1 / -1. With auto-fit,
     that spanning chip touches every auto-computed track, so none of them are
     ever fully empty and the grid can't collapse the extra ones it floats at
     wide containers — it silently sizes for more columns than are visible,
     starving the 3 real ones until a long tier name overran its card. */
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: var(--space-md);
}

.brief-tier {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px;
  text-align: left;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--dur-fast) var(--ease-smooth),
              background var(--dur-fast) var(--ease-smooth),
              transform var(--dur-fast) var(--ease-out-quart);
}

.brief-tier:hover { border-color: var(--color-border-strong); transform: translate3d(0, -2px, 0); }
.brief-tier:active { transform: scale(0.99); }

.brief-tier.is-active {
  border-color: var(--signal);
  background: var(--signal-veil);
}

.brief-tier__name {
  font-family: var(--font-display);
  /* Deliberately its own (smaller, less viewport-aggressive) scale rather than
     --text-subhead: at wide viewports that clamp hits its 36px ceiling, which
     left "Професійний" / "Максимальний" with only ~2px of clearance inside a
     220px-min column and let it visually overrun the next card. */
  font-size: clamp(17px, 1.6vw, 23px);
  font-weight: 500;
  letter-spacing: -0.02em;
  overflow-wrap: anywhere;
}

.brief-tier__term {
  margin-top: auto;
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-wide);
  color: var(--signal);
}

/* --------------------------------------------------------------------------
   DETAIL CARD — replaces the old price estimate. Links out to the chosen
   package's own section on the service page instead of stating a figure.
   -------------------------------------------------------------------------- */
.brief__detail-card {
  display: block;
  margin-top: var(--space-md);
  padding: clamp(20px, 2.2vw, 30px);
  border: 1px solid var(--signal);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(250, 250, 250, 0.056), rgba(250, 250, 250, 0.02));
  color: inherit;
  text-decoration: none;
  animation: brief-step-in 0.5s var(--ease-out-expo) both;
  transition: border-color var(--dur-fast) var(--ease-smooth),
              transform var(--dur-fast) var(--ease-out-quart);
}

.brief__detail-card:hover {
  border-color: var(--color-text-primary);
  transform: translate3d(0, -2px, 0);
}

.brief__detail-card-eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.brief__detail-card-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(20px, 2.2vw, 28px);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.brief__detail-card-title i {
  flex-shrink: 0;
  font-style: normal;
  color: var(--signal);
  transition: transform var(--dur-fast) var(--ease-out-quart);
}

.brief__detail-card:hover .brief__detail-card-title i { transform: translate3d(4px, 0, 0); }

.brief__detail-card-note {
  margin-top: 12px;
  max-width: 52ch;
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.brief__budget {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  animation: brief-step-in 0.5s var(--ease-out-expo) both;
}

/* --------------------------------------------------------------------------
   FIELDS
   -------------------------------------------------------------------------- */
.brief__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.brief__field { margin-top: var(--space-md); }

.brief__field label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.brief__field label em {
  font-style: normal;
  text-transform: none;
  letter-spacing: 0;
  color: var(--color-text-muted);
  opacity: 0.7;
}

.brief__field input,
.brief__field textarea {
  width: 100%;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-body);
  transition: border-color var(--dur-fast) var(--ease-smooth);
}

.brief__field textarea { resize: vertical; min-height: 130px; }

.brief__field input::placeholder,
.brief__field textarea::placeholder { color: var(--color-text-muted); }

.brief__field input:focus,
.brief__field textarea:focus { border-color: var(--signal); }

/* Error state is on the field itself, not only in the status line — a message
   at the bottom of a long form is a message nobody reads.
   With no red available, the error has to be carried by weight and motion
   instead of hue: the rule under the field goes to full-strength signal and
   doubles in thickness, and the field knocks twice. Colour was never the
   accessible channel here anyway — it failed for anyone colour-blind long
   before it failed for being monochrome. */
.brief__field input.is-invalid,
.brief__field textarea.is-invalid {
  border-color: var(--signal);
  border-bottom-width: 2px;
  animation: brief-knock 420ms var(--ease-out-quart);
}

@keyframes brief-knock {
  0%, 100% { transform: translateX(0); }
  22%      { transform: translateX(-5px); }
  58%      { transform: translateX(4px); }
  82%      { transform: translateX(-2px); }
}

@media (prefers-reduced-motion: reduce) {
  .brief__field input.is-invalid,
  .brief__field textarea.is-invalid { animation: none; }
}

/* --------------------------------------------------------------------------
   NAV + STATUS
   -------------------------------------------------------------------------- */
.brief__status {
  min-height: 1.5em;
  margin-top: var(--space-md);
  font-size: var(--text-small);
  color: var(--color-text-muted);
}

/* The status line says which way it went in words; all it needs from styling
   is to stop being quiet. A leading rule marks it as an interruption. */
.brief__status.is-error {
  color: var(--signal);
  font-weight: 500;
  padding-left: 0.85em;
  border-left: 2px solid var(--signal);
}

.brief__nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.brief__back {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--dur-fast) var(--ease-smooth);
}

.brief__back:hover { color: var(--color-text-primary); }

.brief__nav .btn { margin-left: auto; }

/* --------------------------------------------------------------------------
   THANK-YOU
   -------------------------------------------------------------------------- */
.brief__done {
  padding: clamp(30px, 4vw, 60px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(250, 250, 250, 0.035), rgba(250, 250, 250, 0.02));
  text-align: center;
  animation: brief-step-in 0.6s var(--ease-out-expo) both;
}

.brief__done:focus-visible { outline: 2px solid var(--signal); outline-offset: 4px; }

.brief__done-mark {
  display: inline-grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--signal);
  color: var(--signal-invert);
  font-size: 24px;
  line-height: 1;
}

.brief__done-title {
  margin-top: var(--space-sm);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(26px, 3.2vw, 46px);
  letter-spacing: -0.03em;
}

.brief__done-text {
  margin: 12px auto var(--space-md);
  max-width: 46ch;
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

/* --------------------------------------------------------------------------
   RESPONSIVE
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .brief__grid { grid-template-columns: 1fr; }
  .brief__rail { position: static; }
  .brief__steps { display: none; }
}

@media (max-width: 640px) {
  .brief__row { grid-template-columns: 1fr; gap: 0; }
  .brief__chips,
  .brief__tiers { grid-template-columns: 1fr; }
  .brief__nav .btn { margin-left: 0; width: 100%; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  .brief__step,
  .brief__detail-card,
  .brief__budget,
  .brief__done { animation: none; }
  .brief__dot { animation: none; }
  .brief__step-value { transform: none; transition: none; }
  .brief-chip:hover,
  .brief-tier:hover,
  .brief__detail-card:hover,
  .brief__detail-card:hover .brief__detail-card-title i { transform: none; }
}