/* ── Reset & base ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --brand:       #1a5fb4;
  --brand-dark:  #144ea3;
  --brand-light: #e8f0fd;
  --success:     #2d9e6b;
  --danger:      #c0392b;
  --warning-bg:  #fff8e1;
  --warning-border: #f9ca24;
  --info-bg:     #e8f4fd;
  --info-border: #3498db;
  --text:        #1a1a2e;
  --text-muted:  #6b7280;
  --border:      #e2e8f0;
  --bg:          #f8fafc;
  --sidebar-bg:  #ffffff;
  --card-bg:     #ffffff;
  --radius:      10px;
  --shadow:      0 1px 4px rgba(0,0,0,.08);
  --shadow-md:   0 4px 12px rgba(0,0,0,.1);
  --font:        'Inter', system-ui, sans-serif;
}

html { font-size: 15px; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }

/* ── Login page ────────────────────────────────────────────── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--brand-light) 0%, #f0f4ff 100%);
}

.login-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 380px;
  text-align: center;
}

.login-logo { margin-bottom: 1.25rem; }
.login-logo img { max-width: 180px; }

.login-card h1 { font-size: 1.6rem; font-weight: 700; margin-bottom: .25rem; }
.login-subtitle { color: var(--text-muted); font-size: .875rem; margin-bottom: 1.5rem; }

/* ── Layout ────────────────────────────────────────────────── */
.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  min-width: 260px;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-logo { text-align: center; margin-bottom: 1.5rem; }
.sidebar-logo img { max-width: 150px; }

.sidebar-section h3 { font-size: .8rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: .06em; color: var(--text-muted); margin-bottom: .75rem; }

.sidebar-footer { margin-top: auto; padding-top: 1rem; border-top: 1px solid var(--border); }

.main {
  flex: 1;
  padding: 1.5rem 2rem;
  max-width: 900px;
  overflow-y: auto;
}

/* ── Cards ─────────────────────────────────────────────────── */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.card h2 { font-size: 1.1rem; font-weight: 600; margin-bottom: .4rem; }
.card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 1rem; }

/* ── Forms ─────────────────────────────────────────────────── */
.form-group { margin-bottom: .875rem; }
.form-group label { display: block; font-size: .8rem; font-weight: 500; margin-bottom: .3rem; color: var(--text-muted); }
.form-group.inline { display: flex; align-items: center; gap: .5rem; margin-top: .4rem; }
.form-group.inline label { margin: 0; white-space: nowrap; }

input[type="text"],
input[type="password"],
input[type="number"],
select {
  width: 100%;
  padding: .5rem .75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: var(--font);
  font-size: .875rem;
  background: #fff;
  color: var(--text);
  transition: border-color .15s;
}
input:focus, select:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-light); }
input:disabled { background: var(--bg); cursor: not-allowed; }

.count-input { width: 80px; }

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .55rem 1.1rem;
  border-radius: 6px;
  font-family: var(--font);
  font-size: .875rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: background .15s, opacity .15s;
  text-decoration: none;
}
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary   { background: var(--brand); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--brand-dark); }
.btn-success   { background: var(--success); color: #fff; }
.btn-success:hover { filter: brightness(1.1); }
.btn-danger    { background: var(--danger); color: #fff; }
.btn-outline   { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: var(--bg); }
.btn-full  { width: 100%; justify-content: center; }
.btn-sm    { padding: .35rem .75rem; font-size: .8rem; }

/* ── Alerts ─────────────────────────────────────────────────── */
.alert {
  padding: .75rem 1rem;
  border-radius: 6px;
  margin-bottom: 1rem;
  font-size: .875rem;
}
.alert-error   { background: #fde8e8; border-left: 3px solid var(--danger); color: #7b2020; }
.alert-info    { background: var(--info-bg); border-left: 3px solid var(--info-border); }
.alert-info ol { padding-left: 1.2rem; margin-top: .4rem; }
.alert-info li { margin-bottom: .25rem; }
.alert-warning { background: var(--warning-bg); border-left: 3px solid var(--warning-border); }

/* ── Upload area ────────────────────────────────────────────── */
.upload-section h2 { margin-bottom: .25rem; }
.hint { color: var(--text-muted); font-size: .8rem; margin-bottom: .75rem; }

.upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  margin-bottom: .75rem;
}
.upload-area:hover, .upload-area.dragover {
  border-color: var(--brand);
  background: var(--brand-light);
}
.upload-area input[type="file"] { display: none; }
.upload-area label { cursor: pointer; display: flex; flex-direction: column; align-items: center; gap: .5rem; }
.upload-icon { font-size: 2rem; }
#upload-text { font-size: .9rem; color: var(--text-muted); }

/* Logo settings */
.logo-settings { margin-top: .5rem; }
.logo-settings h4 { font-size: .85rem; color: var(--text-muted); margin: 0 0 .25rem; font-weight: 500; }
.logo-inner { padding: .75rem 0 0; }
.logo-inner .hint { margin-bottom: .5rem; }

#logo-preview { display: flex; align-items: center; gap: .75rem; margin-top: .5rem; }
#logo-preview img { max-height: 50px; max-width: 150px; border-radius: 4px; border: 1px solid var(--border); }

/* ── Jargon pre-scan ───────────────────────────────────────── */
#jargon-scan-section h3 { margin-bottom: .5rem; }
#jargon-scan-section .hint { font-size: .85rem; color: var(--text-muted); margin-bottom: .75rem; }
#jargon-scan-section .hint.error { color: var(--danger, #c0392b); }

.jargon-columns { display: flex; gap: 1.5rem; }
.jargon-col { flex: 1; min-width: 0; }
.jargon-col h4 { font-size: .85rem; font-weight: 600; margin: 0 0 .5rem; }

.jargon-checklist {
  max-height: 200px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: .5rem;
  background: var(--bg, #fff);
}

.jargon-item {
  display: flex;
  align-items: center;
  gap: .35rem;
  padding: .2rem 0;
  font-size: .85rem;
  cursor: pointer;
}
.jargon-item:hover { background: var(--bg-hover, #f5f5f5); border-radius: 3px; }
.jargon-item input[type="checkbox"] { margin: 0; flex-shrink: 0; }

.jargon-add-row {
  display: flex;
  gap: .35rem;
  margin-top: .5rem;
}
.jargon-add-row input[type="text"] {
  flex: 1;
  padding: .3rem .5rem;
  font-size: .8rem;
  border: 1px solid var(--border);
  border-radius: 4px;
}

/* ── Metrics grid ───────────────────────────────────────────── */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .75rem;
}
.metric {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .875rem;
  text-align: center;
}
.metric-label { font-size: .75rem; color: var(--text-muted); margin-bottom: .25rem; }
.metric-value { font-size: 1.1rem; font-weight: 600; }

/* ── Settings row ───────────────────────────────────────────── */
.settings-inline {
  display: flex;
  gap: 1.5rem;
}
.settings-inline .form-group { flex: 1; margin-bottom: 0; }

/* ── Tabs (main) ────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: .25rem;
  border-bottom: 2px solid var(--border);
  margin-bottom: 0;
}
.tab-btn {
  padding: .6rem 1rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-family: var(--font);
  font-size: .875rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--text-muted);
  transition: color .15s, border-color .15s;
}
.tab-btn:hover { color: var(--brand); }
.tab-btn.active { color: var(--brand); border-bottom-color: var(--brand); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── Exercise sub-tabs ──────────────────────────────────────── */
.exercise-tabs {
  display: flex;
  gap: .25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}
.ex-tab-btn {
  padding: .4rem .9rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  font-family: var(--font);
  font-size: .8rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--text-muted);
  transition: color .15s, border-color .15s;
}
.ex-tab-btn:hover { color: var(--brand); }
.ex-tab-btn.active { color: var(--brand); border-bottom-color: var(--brand); }
.ex-tab-panel { display: none; }
.ex-tab-panel.active { display: block; }

/* ── Options grid ───────────────────────────────────────────── */
.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: .75rem;
  margin-bottom: 1rem;
}
.options-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.checkbox-label {
  display: flex;
  flex-direction: column;
  gap: .2rem;
  padding: .75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.checkbox-label:hover { border-color: var(--brand); background: var(--brand-light); }
.checkbox-label input[type="checkbox"] { margin-bottom: .1rem; }
.checkbox-label span { font-size: .875rem; font-weight: 500; }
.checkbox-label small { color: var(--text-muted); font-size: .75rem; line-height: 1.4; }

.info-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .75rem;
  font-size: .8rem;
}
.info-box ul { padding-left: 1rem; margin-top: .25rem; }
.info-box li { margin-bottom: .2rem; }

/* ── Action row ─────────────────────────────────────────────── */
.action-row { margin-top: .5rem; margin-bottom: 1rem; }

/* ── Progress ───────────────────────────────────────────────── */
.progress-section { margin: .75rem 0; }
.progress-bar-wrap {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: .4rem;
}
.progress-bar {
  height: 100%;
  background: var(--brand);
  border-radius: 4px;
  width: 0%;
  transition: width .3s ease;
}
.progress-status { font-size: .8rem; color: var(--text-muted); }

/* ── Download area ──────────────────────────────────────────── */
.download-area { margin-top: .75rem; }
.download-ready { display: flex; flex-direction: column; gap: .5rem; }
.download-ready .btn { align-self: flex-start; }
.usage-stats { font-size: .75rem; color: var(--text-muted); }

/* ── Jargon uploads ─────────────────────────────────────────── */
.jargon-uploads {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1rem 0;
}
.file-status { font-size: .8rem; margin-top: .3rem; }
.file-status.ok    { color: var(--success); }
.file-status.error { color: var(--danger); }

/* ── Utilities ──────────────────────────────────────────────── */
.hidden { display: none !important; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; min-width: unset; height: auto; position: static; border-right: none; border-bottom: 1px solid var(--border); }
  .main { padding: 1rem; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .settings-inline { flex-direction: column; gap: .75rem; }
  .options-grid-2 { grid-template-columns: 1fr; }
  .jargon-uploads { grid-template-columns: 1fr; }
}