/* ====================================================================
   /prompt/ — Excavation chat page
   Inherits root variables and base styles from ../styles.css.
   ==================================================================== */

.prompt-page {
  background: var(--bg);
  color: var(--text);
  min-height: 100svh;
  min-height: 100vh;
  font-family: var(--font-serif);
}

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

.prompt-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 22px;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}

.prompt-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 4px 6px;
}

.prompt-back:hover { color: var(--text); opacity: 1; }

.prompt-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-strong);
}

.prompt-startover {
  margin-left: auto;
  background: transparent;
  border: 0;
  padding: 4px 6px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-soft);
  cursor: pointer;
  transition: color 160ms ease;
}

.prompt-startover:hover,
.prompt-startover:focus-visible {
  color: var(--text);
  outline: none;
}

/* ---- Resume banner -------------------------------------------- */

.resume-banner {
  background: #0a0a0a;
  border-bottom: 1px solid var(--rule);
  padding: 10px 22px;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--muted);
  text-align: center;
}

.resume-banner #resume-when {
  font-style: normal;
  color: var(--text);
}

/* ---- Main wrapper --------------------------------------------- */

.prompt-main {
  max-width: 38rem;
  margin: 0 auto;
  padding: 56px 22px 96px;
}

/* ---- Pre-start screen ----------------------------------------- */

.prestart {
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.prestart__intro {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.78;
}

.prestart__h {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.4vw, 40px);
  letter-spacing: -0.01em;
  line-height: 1.15;
  color: var(--text-strong);
  margin: 0 0 0.9em;
  text-wrap: balance;
}

.prestart__intro p {
  margin: 0 0 1.2em;
}

.prestart__intro p:last-child { margin-bottom: 0; }

/* Expandable prompt body */

.prestart__prompt {
  border: 1px solid var(--rule);
  background: #0a0a0a;
  padding: 14px 20px;
}

.prestart__prompt summary {
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
  padding: 4px 0;
  list-style: none;
  position: relative;
  padding-right: 28px;
}

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

.prestart__prompt summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 4px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--muted);
  transition: transform 200ms ease;
}

.prestart__prompt[open] summary::after {
  content: "−";
}

.prestart__sumhint {
  display: block;
  margin-top: 4px;
  font-weight: 400;
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--muted);
  font-family: var(--font-serif);
  font-style: italic;
}

.prestart__promptbody {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  font-family: var(--font-serif);
  font-size: 0.98rem;
  line-height: 1.75;
}

.prestart__promptbody p {
  margin: 0 0 1.2em;
}

.prestart__promptbody p:last-child { margin-bottom: 0; }

.prestart__promptbody strong {
  color: var(--text-strong);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95em;
  letter-spacing: 0.02em;
}

.prestart__promptnote {
  font-style: italic;
  color: var(--muted);
  font-size: 0.92rem;
  border-top: 1px dashed var(--rule);
  padding-top: 1.2em;
  margin-top: 1.2em !important;
}

/* Crisis disclosure */

.prestart__crisis {
  border-left: 2px solid #663333;
  padding: 14px 18px;
  background: #0a0606;
  font-family: var(--font-serif);
  font-size: 0.95rem;
  line-height: 1.65;
  color: #c8b0b0;
}

.prestart__crisis p { margin: 0; }
.prestart__crisis a {
  color: var(--text-strong);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* CTA */

.prestart__cta {
  align-self: flex-start;
  padding: 16px 38px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-strong);
  background: transparent;
  border: 1px solid var(--text);
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease, transform 200ms ease;
  font-family: var(--font-display);
}

.prestart__cta:hover,
.prestart__cta:focus-visible {
  background: var(--text-strong);
  color: var(--bg);
  transform: translateY(-1px);
  outline: none;
}

.prestart__cta-note {
  margin: -16px 0 0;
  font-size: 0.85rem;
  font-style: italic;
  color: var(--muted);
  line-height: 1.6;
}

/* ---- Chat screen ---------------------------------------------- */

.chat {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.chat__messages {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.chat__msg {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  line-height: 1.78;
}

.chat__msg--assistant {
  color: var(--text);
  white-space: pre-wrap;
}

.chat__msg--user {
  color: var(--text-strong);
  padding-left: 22px;
  border-left: 2px solid var(--rule);
  white-space: pre-wrap;
}

.chat__msg--user::before {
  content: "YOU";
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--muted);
  margin-bottom: 6px;
}

.chat__msg--assistant::before {
  content: "EXCAVATION";
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--muted-soft);
  margin-bottom: 6px;
}

.chat__msg--streaming::after {
  content: "▍";
  display: inline-block;
  margin-left: 2px;
  animation: cursor-blink 1s step-end infinite;
  color: var(--muted);
}

@keyframes cursor-blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .chat__msg--streaming::after { animation: none; }
}

/* ---- Form ---------------------------------------------------- */

.chat__form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: sticky;
  bottom: 0;
  background: linear-gradient(180deg, transparent 0%, var(--bg) 18%);
  padding-top: 18px;
  margin-top: 8px;
}

#chat-input {
  width: 100%;
  background: #0a0a0a;
  border: 1px solid var(--rule);
  color: var(--text);
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.6;
  padding: 14px 16px;
  resize: vertical;
  min-height: 80px;
  max-height: 280px;
  border-radius: 0;
  outline: none;
  transition: border-color 160ms ease;
}

#chat-input:focus {
  border-color: var(--text);
}

#chat-input:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.chat__formrow {
  display: flex;
  gap: 10px;
  align-items: stretch;
  flex-wrap: wrap;
}

.chat__send,
.chat__finish {
  padding: 12px 26px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  background: transparent;
  color: var(--text-strong);
  border: 1px solid var(--text);
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease, opacity 200ms ease;
}

.chat__send:hover:not(:disabled),
.chat__finish:hover:not(:disabled) {
  background: var(--text-strong);
  color: var(--bg);
}

.chat__send:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.chat__finish {
  margin-left: auto;
}

.chat__hint {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted-soft);
  text-transform: uppercase;
}

/* ---- Consent modal ------------------------------------------- */

.consent[open],
.sent[open] {
  display: flex;
  flex-direction: column;
  width: min(560px, 92vw);
  max-height: 86vh;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--rule);
  padding: 0;
  overflow: hidden;
}

.consent::backdrop,
.sent::backdrop {
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.consent__form {
  display: flex;
  flex-direction: column;
  height: 100%;
  margin: 0;
  padding: 28px;
  overflow-y: auto;
}

.consent__h {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.005em;
  color: var(--text-strong);
}

.consent__body {
  font-family: var(--font-serif);
  font-size: 0.98rem;
  line-height: 1.72;
  color: var(--text);
  flex: 1;
  margin-bottom: 22px;
}

.consent__body p {
  margin: 0 0 1em;
}

.consent__list {
  margin: 0 0 1.2em;
  padding-left: 1.2em;
}

.consent__list li {
  margin-bottom: 0.6em;
}

.consent__list a {
  color: var(--text-strong);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.consent__confirm {
  font-style: italic;
  color: var(--muted);
  font-size: 0.92rem;
}

.consent__actions {
  list-style: none;
  margin: 0;
  padding: 16px 0 0;
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  border-top: 1px solid var(--rule);
}

.consent__cancel,
.consent__confirm-btn {
  padding: 11px 22px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  cursor: pointer;
  border: 1px solid var(--text);
  background: transparent;
  color: var(--text-strong);
}

.consent__cancel {
  border-color: var(--rule);
  color: var(--muted);
}

.consent__cancel:hover {
  border-color: var(--muted);
  color: var(--text);
}

.consent__confirm-btn:hover {
  background: var(--text-strong);
  color: var(--bg);
}

/* ---- Sent confirmation modal --------------------------------- */

.sent__body {
  padding: 32px 28px;
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.72;
}

.sent__h {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 28px;
  letter-spacing: -0.005em;
  color: var(--text-strong);
}

.sent__body p {
  margin: 0 0 1.1em;
}

.sent__close {
  margin-top: 8px;
  padding: 11px 22px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid var(--text);
  color: var(--text-strong);
  cursor: pointer;
}

.sent__close:hover {
  background: var(--text-strong);
  color: var(--bg);
}

/* ---- Visually hidden helper ---------------------------------- */

.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;
}