* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font-sans); line-height: 1.7; }
button, input, textarea { font: inherit; }
button { cursor: pointer; color: var(--ink-soft); background: var(--card); border: 1px solid var(--line-deep); border-radius: 8px; padding: 9px 15px; }
button:hover:not(:disabled) { border-color: var(--gam); background: var(--gam-soft); }
button.primary { color: #fffdf8; background: #a94d22; border-color: #a94d22; }
button.primary:hover:not(:disabled) { background: #913f18; }
button:disabled { cursor: default; opacity: .48; }
button.quiet { background: transparent; }
:focus-visible { outline: 3px solid var(--gam); outline-offset: 3px; }
input, textarea { width: 100%; color: var(--ink); background: var(--card); border: 1px solid var(--line-deep); border-radius: 8px; padding: 11px 13px; }
textarea { resize: vertical; min-height: 85px; max-height: 240px; }
input:disabled, textarea:disabled { background: var(--paper); }
h1, h2 { font-family: var(--font-serif); font-weight: 600; line-height: 1.45; }
p { margin: 0 0 12px; }
.eyebrow { color: #785537; font-size: 12px; letter-spacing: .1em; margin-bottom: 12px; }
.hint { color: #746650; font-size: 12px; }
.error { color: var(--warn); min-height: 1.7em; margin-top: 12px; }
.gate { min-height: 100dvh; display: flex; justify-content: center; align-items: center; padding: 32px 20px; gap: 20px; }
.login-card { width: min(100%, 460px); padding: 35px; border: 1px solid var(--line-deep); border-radius: var(--radius); background: var(--card); box-shadow: var(--shadow); }
.login-card h1 { font-size: 34px; margin: 20px 0; }
.intro { color: #746650; font-size: 14px; margin-bottom: 30px; }
.login-card label { display: block; margin: 16px 0 6px; font-size: 13px; }
.login-card form .primary { width: 100%; display: flex; justify-content: space-between; }
.login-card > .hint { margin-top: 22px; margin-bottom: 0; }
.workspace { height: 100dvh; display: grid; grid-template-columns: 260px minmax(0, 1fr); }
.sidebar { padding: 28px 20px 20px; border-right: 1px solid var(--line-deep); display: flex; flex-direction: column; min-height: 0; background: #efe5d5; }
.brand { text-decoration: none; color: var(--ink); font: 700 30px var(--font-serif); margin: 0 0 28px 8px; }
.brand span { display: block; font: 12px var(--font-sans); color: #746650; margin-top: 5px; }
#conversation-list { margin-top: 25px; overflow-y: auto; flex: 1; }
.date-group { font-size: 11px; color: #746650; margin: 18px 10px 5px; }
.conversation-link { display: block; width: 100%; text-align: left; border: 1px solid transparent; background: transparent; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 14px; padding: 10px; }
.conversation-link[aria-current="page"] { background: var(--card); border-color: var(--line-deep); }
.sidebar-bottom { border-top: 1px solid var(--line-deep); padding-top: 18px; margin-top: 20px; }
.sidebar-bottom p { margin: 0 8px 2px; }
.sidebar-bottom button { margin-top: 10px; }
.chat-main { min-width: 0; min-height: 0; display: flex; flex-direction: column; }
.chat-header { padding: 22px 36px; border-bottom: 1px solid var(--line); display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.chat-header > div { flex: 1; min-width: 0; }
.chat-header .eyebrow { margin-bottom: 2px; }
.chat-header h1 { margin: 0; font-size: 21px; overflow-wrap: anywhere; }
#title-form { display: flex; align-items: center; gap: 8px; flex-basis: 100%; }
#title-form button { white-space: nowrap; }
.chat-scroll { flex: 1; min-height: 0; overflow-y: auto; padding: 32px max(28px, calc((100% - 780px) / 2)); }
.empty-chat { padding: 7vh 0 30px; max-width: 590px; margin: auto; }
.empty-chat h2 { font-size: clamp(27px, 3.1vw, 42px); margin: 14px 0 24px; }
.empty-chat > p:not(.eyebrow) { color: #746650; font-size: 14px; }
.empty-chat button { margin-top: 15px; }
.message { margin-bottom: 24px; overflow-wrap: anywhere; }
.message-meta { display: flex; gap: 16px; align-items: center; margin-bottom: 8px; font-size: 12px; color: #746650; }
.message-meta button { padding: 3px 10px; font-size: 11px; }
.message-text { white-space: pre-wrap; padding: 19px 22px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); font-size: 15px; }
.message[data-role="user"] .message-text { background: var(--gam-soft); border-color: transparent; }
.message-status { font-size: 12px; color: var(--warn); margin-top: 8px; }
.image-placeholder { border: 1px dashed #b6b0a6; background: #e9e6df; color: #635f58; border-radius: var(--radius); padding: 54px 20px; text-align: center; margin: 15px 0; }
.image-card { background: var(--card); border: 1px solid var(--line-deep); border-radius: var(--radius); padding: 18px; margin-top: 12px; }
.image-card .image-placeholder { margin-top: 0; }
details { font-size: 13px; }
summary { cursor: pointer; color: #85532d; padding: 5px 0; }
details dt { margin-top: 14px; font-weight: 600; }
details dd { margin: 5px 0 10px; white-space: pre-wrap; }
.composer-area { padding: 0 max(28px, calc((100% - 780px) / 2)) 18px; }
.composer { background: var(--card); border: 1px solid var(--line-deep); padding: 12px 16px; border-radius: var(--radius); box-shadow: var(--shadow); }
.composer:focus-within { border-color: var(--gam); }
.composer textarea { border: 0; padding: 2px; background: transparent; }
.composer textarea:focus-visible { outline-offset: 4px; outline-width: 2px; }
.composer-footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 7px; }
.input-help { text-align: center; margin: 10px 0 0; }
.notice { color: var(--warn); font-size: 13px; margin: 6px 0; min-height: 1.7em; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.records-nav { margin-top: 10px; }
.records-nav[aria-pressed="true"] { background: var(--card); border-color: var(--gam); }
.records-main { display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.records-scroll { overflow-y: auto; padding: 24px 32px; }
.image-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); gap: 18px; }
.image-grid .image-card { margin: 0; }
.image-card { min-width: 0; overflow-wrap: anywhere; }
.image-card img { display: block; width: 100%; max-height: 440px; object-fit: contain; border-radius: 8px; background: #e9e6df; }
.image-select { display: block; width: 100%; padding: 0; border: 0; background: transparent; }
.image-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; margin: 12px 0; font-size: 13px; }
.image-actions a { color: #85532d; text-underline-offset: 3px; }
.image-actions button { padding: 5px 10px; font-size: 13px; }
.prompt-text { white-space: pre-wrap; }
.lineage-tree { max-width: 900px; margin: auto; }
.lineage-node { border-left: 3px solid var(--line-deep); }
.lineage-node h2 { font: 600 14px var(--font-sans); margin: 4px 0 14px; }
.lineage-node[data-depth="1"] { margin-left: 24px; }
.lineage-node[data-depth="2"] { margin-left: 48px; }
.lineage-node[data-depth="3"] { margin-left: 72px; }
.lineage-node.selected { border-color: #a94d22; box-shadow: 0 0 0 1px #a94d22; }
.revision { padding: 5px 0 10px; color: #85532d; font-size: 13px; }
.revision button { margin-left: 8px; padding: 3px 10px; }
.revision .hint { margin: 5px 0 0; }
#more-images { margin-top: 20px; }
.writing-layout { display: grid; grid-template-columns: minmax(140px, 210px) minmax(0, 1fr); gap: 24px; }
.writing-layout > *, .writing-editor { min-width: 0; }
.writing-list { margin: 16px 0; }
.writing-editor label, #image-submission-form label { display: block; margin: 12px 0 5px; }
.writing-editor textarea { min-height: 300px; max-height: none; }
.writing-editor .image-actions { align-items: stretch; }
.gallery-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr)); gap: 20px; margin: 20px 0; }
.gallery-card, .finished-card { padding: 24px; border: 1px solid var(--line-deep); border-radius: var(--radius); background: var(--card); min-width: 0; overflow-wrap: anywhere; }
.gallery-card h2, .finished-card h2 { margin: 4px 0 10px; }
.gallery-card img, .finished-card img, .submission-preview { display: block; width: 100%; max-height: 480px; object-fit: contain; margin: 14px 0; border-radius: 8px; }
.gallery-card button { margin: 8px 8px 0 0; }
.finished-card, #image-submission-form { max-width: 850px; margin: 16px auto; }
.finished-text, .gallery-excerpt { white-space: pre-wrap; }
.finished-text { line-height: 1.9; }
.submission-status { color: #85532d; font-size: 13px; }
@media (max-width: 1000px) { .writing-layout { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 480px) { .gallery-card, .finished-card { padding: 14px; } .writing-editor textarea { min-height: 240px; } }
@media (max-width: 720px) {
  .workspace { grid-template-columns: 170px minmax(0, 1fr); }
  .sidebar { padding: 20px 10px; }
  .brand { font-size: 25px; }
  .chat-header { padding: 18px; }
  .chat-scroll { padding: 20px 16px; }
  .composer-area { padding: 0 16px 14px; }
  .composer-footer { align-items: flex-end; }
  .composer-footer button { white-space: nowrap; }
}
@media (max-width: 480px) {
  .records-scroll { padding: 16px 10px; }
  .image-card { padding: 12px; }
  .lineage-node[data-depth] { margin-left: 0; }
  .workspace { grid-template-columns: 125px minmax(0, 1fr); }
  .sidebar { padding: 18px 7px; }
  .brand { margin-left: 3px; }
  .brand span { font-size: 10px; }
  .sidebar .primary { padding: 8px 4px; font-size: 13px; }
  .chat-header, .chat-scroll { padding: 16px 12px; }
  .chat-header > div { flex-basis: 100%; }
  .chat-header { gap: 8px; }
  .chat-header h1 { font-size: 18px; }
  .chat-header > button { padding: 4px 10px; font-size: 12px; }
  .composer-area { padding: 0 10px 10px; }
  .composer { padding: 10px; }
  .composer-footer { flex-wrap: wrap; }
  .message-text { padding: 14px; }
  .login-card { padding: 25px; }
}