/* ==========================================================================
   HADRIAN SYSTEMS — CONVERSATION & WELCOME STYLES (assets/css/book.css)
   Palette (locked):
     Ivory (paper):   #F4EEE2
     Warm Stone:      #D9CFBE
     Sage:            #8E9A84
     Bronze:          #9A6B3F
     Ink:             #1C1A17
   Typography (locked):
     Headings & Wordmark: 'Cinzel', weight 500, letter-spacing 0.04em, upright roman
     Body & UI:           'Inter', weights 400, 500, upright roman
   ========================================================================== */

/* ==========================================================================
   HERO / PAGE LEAD
   ========================================================================== */
.book-hero {
  padding: clamp(48px, 6.5vw, 84px) 0 clamp(36px, 5vw, 56px);
  background-color: var(--ivory);
  border-bottom: 1px solid var(--stone);
}

.book-hero-inner {
  max-width: 720px;
}

.book-eyebrow {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bronze);
  margin-bottom: 14px;
}

.book-title {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.04em;
  font-size: clamp(2.125rem, 4.4vw, 3.375rem);
  line-height: 1.1;
  color: var(--ink);
  margin: 0 0 18px;
}

.book-lead {
  font-family: var(--font-sans);
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.55;
  color: var(--ink);
  max-width: 58ch;
}

.book-hero .rule-bronze,
.book-hero .rule-sage {
  margin-top: clamp(22px, 3vw, 32px);
}

/* ==========================================================================
   PROMINENT PRE-FORM STATUS BANNER (LOCAL PREVIEW / NOT CONNECTED)
   ========================================================================== */
.intake-banner {
  border-top: 1px solid var(--bronze);
  border-bottom: 1px solid var(--stone);
  border-left: 2px solid var(--bronze);
  background-color: var(--sage-wash);
  padding: clamp(18px, 2.5vw, 24px);
  margin-bottom: clamp(28px, 4vw, 36px);
}

.intake-banner-label {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bronze);
  margin-bottom: 8px;
}

.intake-banner-headline {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.04em;
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.3;
  color: var(--ink);
  margin: 0 0 8px;
}

.intake-banner-copy {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.58;
  color: var(--ink);
  max-width: 62ch;
}

/* ==========================================================================
   CONVERSATION LAYOUT & LANE SELECTOR
   ========================================================================== */
.book-main {
  padding: clamp(48px, 6.5vw, 88px) 0;
  background-color: var(--ivory);
  border-bottom: 1px solid var(--stone);
}

.book-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(40px, 5.5vw, 64px);
  align-items: start;
}

@media (min-width: 900px) {
  .book-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(48px, 6vw, 84px);
  }
}

.book-form {
  width: 100%;
  min-width: 0;
}

.form-block {
  padding-bottom: clamp(24px, 3.5vw, 36px);
  margin-bottom: clamp(24px, 3.5vw, 36px);
  border-bottom: 1px solid var(--stone);
}

.form-block-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}

.form-step-num {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--bronze);
  font-variant-numeric: tabular-nums;
}

.form-step-title {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.04em;
  font-size: clamp(1.125rem, 1.6vw, 1.35rem);
  line-height: 1.2;
  color: var(--ink);
  margin: 0;
}

/* Lane selector buttons */
.lane-selector {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

@media (max-width: 520px) {
  .lane-selector {
    grid-template-columns: minmax(0, 1fr);
  }
}

.lane-option {
  appearance: none;
  background-color: transparent;
  border: 1px solid var(--stone);
  padding: 14px 16px;
  text-align: left;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: var(--ink);
  font-family: var(--font-sans);
  transition: border-color 150ms ease, background-color 150ms ease, color 150ms ease;
  min-width: 0;
}

.lane-option:hover {
  border-color: var(--bronze);
}

.lane-option:focus-visible {
  outline: 2px solid var(--bronze);
  outline-offset: 2px;
}

.lane-option[aria-pressed="true"] {
  border-color: var(--ink);
  background-color: var(--ink);
  color: var(--ivory);
}

.lane-option-label {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.04em;
  font-size: 1rem;
  line-height: 1.25;
  color: inherit;
}

.lane-option-route {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--bronze);
}

.lane-option[aria-pressed="true"] .lane-option-route {
  color: var(--stone);
}

/* ==========================================================================
   FORM FIELDS (CLEAN ARCHITECTURAL HAIRLINES + VISIBLE FOCUS RINGS)
   ========================================================================== */
.field-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.field-row-2 {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

@media (min-width: 600px) {
  .field-row-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.field-label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
}

.field-optional {
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--bronze);
}

.field-input,
.field-textarea {
  appearance: none;
  width: 100%;
  max-width: 100%;
  background-color: transparent;
  border: 1px solid var(--stone);
  border-radius: 0;
  padding: 13px 14px;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.45;
  color: var(--ink);
  transition: border-color 150ms ease;
}

.field-input::placeholder,
.field-textarea::placeholder {
  color: var(--ink);
  opacity: 0.48;
}

.field-input:focus,
.field-textarea:focus {
  border-color: var(--bronze);
}

.field-input:focus-visible,
.field-textarea:focus-visible {
  outline: 2px solid var(--bronze);
  outline-offset: 2px;
  border-color: var(--ink);
}

.field-input[aria-invalid="true"],
.field-textarea[aria-invalid="true"] {
  border-color: var(--bronze);
}

.field-textarea {
  min-height: 112px;
  resize: vertical;
}

/* ==========================================================================
   ACTIONS, LOCAL BRIEF DOWNLOAD & PRIVACY NOTE
   ========================================================================== */
.form-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.form-button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
  width: 100%;
}

.form-button-row .btn {
  max-width: 100%;
  white-space: normal;
  text-align: center;
}

.btn[disabled],
.btn:disabled {
  background-color: transparent;
  color: var(--ink);
  border-color: var(--stone);
  opacity: 0.55;
  cursor: not-allowed;
}

.local-action-caption {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.58;
  color: var(--ink);
  max-width: 58ch;
}

.local-action-caption strong {
  font-weight: 500;
  color: var(--bronze);
}

.intake-status-note {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--bronze);
}

.intake-feedback-note {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink);
  border-left: 2px solid var(--sage);
  background-color: var(--sage-wash);
  padding: 10px 14px;
  max-width: 58ch;
}

.intake-error-note {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--ink);
  border-left: 2px solid var(--bronze);
  background-color: rgba(154, 107, 63, 0.1);
  padding: 10px 14px;
  max-width: 58ch;
}

.intake-privacy-note {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.58;
  color: var(--ink);
  opacity: 0.9;
  border-top: 1px solid var(--stone);
  padding-top: 14px;
  width: 100%;
  max-width: 58ch;
}

.intake-error-note[hidden],
.intake-feedback-note[hidden],
.intake-status-note[hidden],
.intake-banner[hidden] {
  display: none;
}

/* ==========================================================================
   ASIDE / PROCESS & WELCOME CHECKLIST
   ========================================================================== */
.book-aside {
  border-top: 1px solid var(--stone);
  padding-top: 24px;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(32px, 4vw, 44px);
}

@media (min-width: 900px) {
  .book-aside {
    position: sticky;
    top: 36px;
  }
}

.book-aside-block {
  min-width: 0;
}

.book-aside-spec {
  border-top: 1px solid var(--stone);
  padding-top: 24px;
  min-width: 0;
}

.book-aside-foot {
  margin-top: 18px;
  padding-top: 4px;
}

.book-aside-title {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.04em;
  font-size: clamp(1.2rem, 1.8vw, 1.45rem);
  line-height: 1.2;
  color: var(--ink);
  margin: 0 0 16px;
}

.book-aside-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--stone);
}

.book-aside-item {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 12px;
  padding: 18px 0;
  border-bottom: 1px solid var(--stone);
  align-items: baseline;
}

.book-aside-item-title {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.04em;
  font-size: 1.0625rem;
  line-height: 1.3;
  color: var(--ink);
  margin: 0 0 4px;
}

.book-aside-item-copy {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.58;
  color: var(--ink);
  margin: 0;
}

/* ==========================================================================
   BOOK ARCH ART BAND — DELIBERATE FRAMING ON DESKTOP & MOBILE
   ========================================================================== */
.book-art-band {
  min-height: clamp(320px, 38vw, 480px);
}

@media (max-width: 760px) {
  .book-art-band {
    min-height: 0;
    flex-direction: column;
    align-items: stretch;
  }

  .book-art-band .art-band-inner {
    padding-top: 36px;
    padding-bottom: 18px;
  }

  .book-art-band .art-band-media {
    position: relative;
    inset: auto;
    width: 100%;
    height: clamp(220px, 58vw, 270px);
    overflow: hidden;
  }

  .book-art-band .art-band-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 86% 46%;
  }
}

/* ==========================================================================
   WELCOME PAGE ACTIONS & STATUS
   ========================================================================== */
.welcome-status-banner {
  margin-top: 22px;
  max-width: 58ch;
}

.welcome-return {
  margin-top: clamp(32px, 4.5vw, 48px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
}

/* ==========================================================================
   PRE-LOADED DIAGNOSTIC TELEMETRY BANNER & LIVE BRIEF PREVIEW (/book/)
   ========================================================================== */
.diagnostic-context-bar {
  background-color: var(--ink);
  color: var(--ivory);
  border: 1px solid var(--ink);
  border-left: 3px solid var(--bronze);
  padding: clamp(18px, 2.4vw, 24px);
  margin-bottom: clamp(24px, 3.2vw, 32px);
}

.diagnostic-context-bar[hidden] {
  display: none !important;
}

.diagnostic-context-kicker {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bronze);
  margin-bottom: 6px;
}

.diagnostic-context-title {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.04em;
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  color: var(--ivory);
  margin: 0 0 6px;
}

.diagnostic-context-summary {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--stone);
  margin: 0;
  font-variant-numeric: tabular-nums;
}

.intake-banner--executive {
  background-color: rgba(217, 207, 190, 0.24);
  border-top: 1px solid var(--stone);
  border-bottom: 1px solid var(--stone);
  border-left: 2px solid var(--bronze);
}