:root {
  --paper: #f4ede0;
  --paper-deep: #ebe1cd;
  --ink: #1a1612;
  --ink-soft: #4a3f33;
  --ink-faded: #7a6a55;
  --rule: #b8a888;
  --accent: #2c4a5e;        /* deeper blue for the "hidden depth" feel */
  --accent-soft: #c9a48f;
  --highlight: #e8d4a8;
  --green-go: #3d5a2c;
  --serif: 'Cormorant Garamond', Georgia, serif;
  --mono: 'JetBrains Mono', 'Courier New', monospace;
  --type: 'Special Elite', 'Courier New', monospace;
}

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

body {
  font-family: var(--serif);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  min-height: 100vh;
  background-image:
    radial-gradient(circle at 25% 25%, rgba(44, 74, 94, 0.05) 0%, transparent 45%),
    radial-gradient(circle at 75% 75%, rgba(140, 100, 60, 0.06) 0%, transparent 50%),
    repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,0,0,0.005) 2px, rgba(0,0,0,0.005) 4px);
}

.masthead {
  border-bottom: 4px double var(--ink);
  padding: 2.5rem 1.5rem 2rem;
  text-align: center;
}
.masthead-inner { max-width: 1100px; margin: 0 auto; }
.dateline {
  display: flex;
  justify-content: space-between;
  font-family: var(--type);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 0.5rem 0;
  margin-bottom: 1.5rem;
}
.title {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 6.5vw, 4.6rem);
  font-weight: 700;
  font-style: italic;
  line-height: 1;
  margin-bottom: 0.5rem;
}
.subtitle {
  font-family: var(--type);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
  max-width: 60ch;
  margin: 0 auto;
}

.mode-switch {
  display: flex;
  justify-content: center;
  gap: 0;
  padding: 1.5rem;
  border-bottom: 1px solid var(--rule);
  background: var(--paper-deep);
  flex-wrap: wrap;
}
.mode {
  background: transparent;
  border: none;
  font-family: var(--type);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 0.6rem 1.4rem;
  cursor: pointer;
  position: relative;
}
.mode::after {
  content: "·";
  position: absolute;
  right: -2px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--rule);
}
.mode:last-child::after { display: none; }
.mode:hover { color: var(--accent); }
.mode.active { color: var(--ink); font-weight: 700; }
.mode.active::before {
  content: "❦";
  display: block;
  position: absolute;
  top: -0.4rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.8rem;
  color: var(--accent);
}

.bench {
  max-width: 900px;
  margin: 3rem auto;
  padding: 0 1.5rem;
}
.panel { display: none; animation: fadeIn 0.4s ease; }
.panel.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

.panel h2 {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 600;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.75rem;
  margin-bottom: 1.25rem;
}
.lede {
  font-family: var(--serif);
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--ink-soft);
  font-style: italic;
  margin-bottom: 2rem;
  max-width: 60ch;
}

.dropzone {
  border: 2px dashed var(--rule);
  background: var(--paper-deep);
  padding: 2.5rem 1.5rem;
  text-align: center;
  margin-bottom: 1.5rem;
  transition: all 0.2s;
  cursor: pointer;
}
.dropzone:hover, .dropzone.drag {
  border-color: var(--accent);
  background: var(--highlight);
}
.dropzone-inner { pointer-events: none; }
.dropzone-inner > * { pointer-events: auto; }
.seal-mark { font-size: 2.5rem; display: block; margin-bottom: 0.5rem; }
.drop-prompt { font-family: var(--serif); font-size: 1.2rem; font-style: italic; }
.drop-hint { font-family: var(--type); font-size: 0.8rem; color: var(--ink-faded); margin-top: 0.5rem; letter-spacing: 0.05em; }
.link-btn {
  background: none; border: none; font-family: inherit; font-size: inherit;
  color: var(--accent); text-decoration: underline; text-decoration-style: dotted;
  cursor: pointer; padding: 0; font-style: italic;
}

.image-preview {
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  padding: 1rem;
  margin-bottom: 1.5rem;
  text-align: center;
}
.image-preview canvas {
  max-width: 100%;
  max-height: 360px;
  border: 1px solid var(--ink);
  background: #fff;
  display: inline-block;
}
.preview-meta {
  font-family: var(--type);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--ink-faded);
  margin-top: 0.75rem;
}

.message-area { margin-bottom: 1.5rem; }
.message-area label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--type);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.5rem;
}
.counter {
  font-family: var(--mono);
  text-transform: none;
  color: var(--ink-faded);
  font-size: 0.75rem;
}

textarea {
  font-family: var(--mono);
  font-size: 0.95rem;
  line-height: 1.7;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--ink);
  padding: 1.25rem 1.5rem;
  color: var(--ink);
  resize: vertical;
  min-height: 120px;
  width: 100%;
}
textarea:focus { outline: none; border-color: var(--accent); border-left-color: var(--accent); }
textarea[readonly] { background: var(--paper-deep); border-left-color: var(--accent-soft); }

.control-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  margin-bottom: 1.5rem;
}
.control-row label {
  font-family: var(--type);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
  min-width: 220px;
}
.control-row input[type="text"], .control-row input[type="password"] {
  font-family: var(--mono);
  font-size: 0.95rem;
  background: var(--paper);
  border: 1px solid var(--ink);
  padding: 0.5rem 0.7rem;
  color: var(--ink);
  flex: 1;
}
.control-row input:focus { outline: none; border-color: var(--accent); background: var(--highlight); }

.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.btn-primary, .btn-secondary, .btn-ghost {
  font-family: var(--type);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.6rem 1.2rem;
  border: 1px solid var(--ink);
  cursor: pointer;
  transition: all 0.18s;
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover:not(:disabled) { background: var(--accent); border-color: var(--accent); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-secondary { background: var(--paper); color: var(--ink); }
.btn-secondary:hover { background: var(--ink); color: var(--paper); }
.btn-ghost { background: transparent; border-color: var(--ink-faded); color: var(--ink-soft); }
.btn-ghost:hover { border-color: var(--ink); color: var(--ink); }

.result-panel {
  margin-top: 1rem;
  padding: 2rem 1.75rem;
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--green-go);
}
.result-panel h3 {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.6rem;
  margin-bottom: 0.75rem;
  color: var(--green-go);
}
.result-panel textarea { margin-bottom: 1rem; }
.result-line { font-family: var(--serif); font-size: 1.05rem; margin-bottom: 1.25rem; }

.error-panel {
  margin-top: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--paper-deep);
  border-left: 4px solid #8b1a1a;
  font-family: var(--serif);
  font-style: italic;
  color: #8b1a1a;
}

.lesson-card {
  background: var(--paper-deep);
  border-left: 3px solid var(--accent);
  padding: 1.5rem 1.75rem;
  margin-bottom: 1.5rem;
}
.lesson-card h3 {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}
.lesson-card p { font-family: var(--serif); font-size: 1.05rem; line-height: 1.7; color: var(--ink-soft); }

.footer {
  border-top: 4px double var(--ink);
  padding: 2rem 1.5rem;
  text-align: center;
  font-family: var(--type);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  margin-top: 4rem;
}

@media (max-width: 700px) {
  .dateline { font-size: 0.65rem; gap: 0.5rem; }
  .control-row { flex-direction: column; align-items: stretch; }
  .control-row label { min-width: 0; }
  .actions { justify-content: stretch; }
  .actions button { flex: 1; }
}