:root {
  --cream: #FAF6EE;
  --navy: #1A2F5C;
  --card-navy: #243A6B;
  --gold: #C9A84C;
  --gold-light: #E0BC6A;
  --ink-faint: rgba(250, 246, 238, 0.55);
  --line: rgba(250, 246, 238, 0.12);
  --radius: 6px;
  --pad: clamp(1.25rem, 3vw, 1.75rem);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  font-family: 'DM Sans', system-ui, sans-serif;
  background: var(--cream);
  color: var(--navy);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

h1, h2, h3 {
  font-family: 'Playfair Display', serif;
  font-weight: 600;
  letter-spacing: .01em;
}

button { font-family: inherit; cursor: pointer; }

.app-header {
  padding: clamp(1.5rem, 5vw, 3rem) clamp(1.25rem, 5vw, 4rem) 0.5rem;
  border-bottom: 4px solid var(--gold);
}
.app-header h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--navy);
}
.app-header h1 span { color: var(--gold); }
.app-header .eyebrow {
  margin-top: .35rem;
  font-size: .72rem;
  color: var(--navy);
  opacity: .55;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.app-main {
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(1.25rem, 5vw, 2.5rem) clamp(1rem, 4vw, 2rem) 4rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.card {
  background: var(--card-navy);
  color: var(--cream);
  border-top: 3px solid var(--gold);
  border-radius: var(--radius);
  padding: var(--pad);
}
.card[hidden] { display: none; }

.card h2 {
  font-size: 1.35rem;
  color: var(--cream);
  margin-bottom: .25rem;
}
.card-sub {
  font-size: .85rem;
  color: var(--ink-faint);
  margin-bottom: 1.25rem;
}

.stack { display: flex; flex-direction: column; gap: 1rem; }
.stack label { display: flex; flex-direction: column; gap: .35rem; font-size: .85rem; }
.stack label span { color: var(--ink-faint); letter-spacing: .04em; }

input[type="text"],
input[type="datetime-local"],
textarea {
  font-family: inherit;
  font-size: .95rem;
  color: var(--cream);
  background: rgba(0, 0, 0, .25);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .7rem .85rem;
  outline: none;
  transition: border-color .15s;
}
input:focus, textarea:focus { border-color: var(--gold); }
textarea { resize: vertical; min-height: 5rem; }

.btn-primary,
.btn-secondary {
  font-weight: 600;
  font-size: .9rem;
  letter-spacing: .04em;
  padding: .7rem 1.4rem;
  border-radius: var(--radius);
  border: none;
  transition: background .15s, transform .12s, opacity .15s;
}
.btn-primary { background: var(--gold); color: var(--navy); }
.btn-primary:hover:not(:disabled) { background: var(--gold-light); }
.btn-secondary {
  background: transparent; color: var(--gold);
  border: 1px solid var(--gold);
}
.btn-secondary:hover:not(:disabled) { background: rgba(201, 168, 76, .12); }
.btn-primary:disabled, .btn-secondary:disabled { opacity: .45; cursor: not-allowed; }

.tone-row { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.tone-btn {
  flex: 1 1 auto;
  min-width: 9rem;
  background: transparent;
  color: var(--cream);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .55rem .9rem;
  font-size: .85rem;
}
.tone-btn[aria-pressed="true"] {
  background: var(--gold);
  color: var(--navy);
  border-color: var(--gold);
}

.image-source {
  margin: 1rem 0;
  padding: 1rem;
  background: rgba(0, 0, 0, .2);
  border-radius: var(--radius);
  border: 1px solid var(--line);
}
.src-row { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: .75rem; }
.src-btn {
  flex: 1 1 auto;
  min-width: 11rem;
  background: transparent;
  color: var(--cream);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .55rem .9rem;
  font-size: .85rem;
}
.src-btn[aria-pressed="true"] {
  background: var(--gold);
  color: var(--navy);
  border-color: var(--gold);
}
.quota-line { font-size: .8rem; color: var(--gold-light); margin-bottom: .5rem; }
.quota-line.quota-exhausted { color: #EB5757; }

.upload-row { display: flex; gap: .65rem; align-items: center; flex-wrap: wrap; margin-top: .5rem; }
.upload-info { font-size: .8rem; color: var(--ink-faint); }
.upload-info.error { color: #EB5757; }

.subjects { list-style: none; display: flex; flex-direction: column; gap: .4rem; margin-top: 1rem; }
.subjects li {
  background: rgba(0, 0, 0, .2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .65rem .85rem;
  font-size: .9rem;
  cursor: pointer;
}
.subjects li:hover { border-color: var(--gold); }

.post-image {
  margin: 1rem 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(0, 0, 0, .3);
  aspect-ratio: 1 / 1;
}
.post-image img { display: block; width: 100%; height: 100%; object-fit: cover; }

.caption { font-size: .95rem; line-height: 1.55; margin-bottom: .75rem; }
.hashtags { font-size: .85rem; color: var(--gold); }

.chat {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}
.chat-log {
  font-size: .85rem;
  color: var(--ink-faint);
  display: flex;
  flex-direction: column;
  gap: .5rem;
  margin-bottom: .75rem;
  max-height: 12rem;
  overflow-y: auto;
}
.chat-log .msg { padding: .4rem .65rem; border-radius: var(--radius); background: rgba(0,0,0,.2); }
.chat-log .msg.you { color: var(--cream); }
.chat-log .msg.ai  { color: var(--gold-light); }
.chat-form { display: flex; gap: .5rem; }
.chat-form input { flex: 1; }

.publish-row { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; margin-bottom: 1rem; }
.publish-row input { flex: 1 1 12rem; }

.platform-row { display: flex; flex-wrap: wrap; gap: .5rem; }
.platform-btn {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--cream);
  border-radius: var(--radius);
  padding: .5rem .85rem;
  font-size: .8rem;
}
.platform-btn.active { border-color: var(--gold); color: var(--gold); }
.platform-btn.disabled { opacity: .4; cursor: not-allowed; }

.history { list-style: none; display: flex; flex-direction: column; gap: .5rem; }
.history li {
  background: rgba(0, 0, 0, .2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: .7rem .9rem;
  font-size: .85rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: .25rem .75rem;
}
.history .h-caption { grid-column: 1 / -1; opacity: .9; }
.history .h-meta { font-size: .75rem; color: var(--ink-faint); }
.history .h-status { font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; }
.history .status-draft     { color: var(--ink-faint); }
.history .status-scheduled { color: var(--gold-light); }
.history .status-posted    { color: #6FCF97; }
.history .status-failed    { color: #EB5757; }

.status { font-size: .8rem; color: var(--gold-light); margin-top: .5rem; min-height: 1em; }
.status.error { color: #EB5757; }

.app-footer {
  text-align: center;
  padding: 2rem 1rem 3rem;
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--navy);
  opacity: .45;
}

@media (min-width: 900px) {
  .app-main { max-width: 880px; }
}