:root {
  --bg:        #1a1a1a;
  --surface:   #232323;
  --border:    #2e2e2e;
  --cream:     #e8dcc8;
  --cream-dim: #8a7f70;
  --accent:    #c8a87a;
  --error:     #b06060;
}

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

body {
  background: var(--bg);
  color: var(--cream);
  font-family: 'Courier New', Courier, monospace;
  font-size: 1.15rem;
  min-height: 100vh;
  padding: 3rem 2rem;
  max-width: 760px;
  margin: 0 auto;
}

h1 {
  font-size: 2.6rem;
  font-weight: normal;
  letter-spacing: .25em;
  color: var(--accent);
}

.tagline {
  font-size: 1.05rem;
  color: var(--cream-dim);
  margin-top: .35rem;
  margin-bottom: 2.5rem;
  letter-spacing: .05em;
}

/* ── about ── */
.about {
  border-top: 1px solid var(--border);
  color: var(--cream-dim);
  font-size: 1rem;
  line-height: 1.8;
  margin-top: 1rem;
  padding-top: 1.5rem;
}

.about p + p { margin-top: .75rem; }
.byline { margin-top: 1.25rem; font-size: .9rem; }
.heart { color: var(--accent); }
.about a { color: var(--accent); text-decoration: none; border-bottom: 0.5px solid var(--accent); }
.about a:hover { opacity: .75; }

/* ── tabs ── */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

.tab {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--cream-dim);
  cursor: pointer;
  font-family: inherit;
  font-size: 1.05rem;
  letter-spacing: .12em;
  padding: .5rem 1.4rem;
  margin-bottom: -1px;
  transition: color .15s;
}

.tab:hover { color: var(--cream); }
.tab.active { color: var(--cream); border-bottom-color: var(--accent); }

/* Stack panels in the same grid cell — switching visibility never shifts layout */
.panels {
  display: grid;
}

.panel {
  grid-area: 1 / 1;
  visibility: hidden;
  pointer-events: none;
}

.panel.active {
  visibility: visible;
  pointer-events: auto;
}

/* ── fields ── */
.field { margin-bottom: 1.4rem; }

label.field-label {
  display: block;
  font-size: .9rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cream-dim);
  margin-bottom: .45rem;
}

input[type="file"] { display: none; }

.file-btn {
  display: inline-block;
  border: 1px solid var(--border);
  color: var(--cream-dim);
  cursor: pointer;
  font-family: inherit;
  font-size: 1.05rem;
  padding: .5rem 1.1rem;
  transition: border-color .15s, color .15s;
}

.file-btn:hover { border-color: var(--cream-dim); color: var(--cream); }

.file-name {
  display: inline-block;
  font-size: 1rem;
  color: var(--cream-dim);
  margin-left: .75rem;
  vertical-align: middle;
}

textarea {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--cream);
  font-family: inherit;
  font-size: 1.05rem;
  line-height: 1.55;
  outline: none;
  padding: .8rem;
  resize: vertical;
  transition: border-color .15s;
}

textarea:focus { border-color: var(--cream-dim); }
textarea::placeholder { color: var(--cream-dim); opacity: .5; }

.output-box {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--cream-dim);
  font-size: 1.05rem;
  line-height: 1.6;
  padding: .8rem;
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 3rem;
}

/* ── toggle ── */
.toggle-row {
  align-items: center;
  display: flex;
  gap: .7rem;
  margin-bottom: 1.4rem;
}

.toggle {
  background: var(--border);
  border: none;
  border-radius: 1rem;
  cursor: pointer;
  height: 1.1rem;
  position: relative;
  transition: background .2s;
  width: 2.2rem;
  flex-shrink: 0;
}

.toggle.on { background: var(--accent); }

.toggle::after {
  background: var(--cream);
  border-radius: 50%;
  content: '';
  height: .8rem;
  left: .15rem;
  position: absolute;
  top: .15rem;
  transition: left .2s;
  width: .8rem;
}

.toggle.on::after { left: 1.25rem; }
.toggle-label { color: var(--cream-dim); font-size: 1.05rem; }

/* ── buttons ── */
.btn {
  background: none;
  border: 1px solid var(--accent);
  color: var(--accent);
  cursor: pointer;
  font-family: inherit;
  font-size: 1.05rem;
  letter-spacing: .1em;
  padding: .5rem 1.5rem;
  transition: background .15s, color .15s;
}

.btn:hover { background: var(--accent); color: var(--bg); }
.btn:disabled { opacity: .35; cursor: default; }
.btn:disabled:hover { background: none; color: var(--accent); }

.btn-row { display: flex; gap: .75rem; align-items: center; flex-wrap: wrap; }

/* ── status ── */
.status {
  color: var(--cream-dim);
  font-size: .95rem;
  letter-spacing: .05em;
  margin-top: .6rem;
  min-height: 1rem;
}

.status.error { color: var(--error); }

/* ── meta ── */
.meta {
  color: var(--cream-dim);
  font-size: .95rem;
  margin-top: .8rem;
}

.meta span { color: var(--cream); }

/* ── result sections ── */
.result { margin-top: 1.75rem; }