:root {
  --primary: #4F46E5;
  --primary-dark: #4338CA;
  --primary-light: #EEF2FF;
  --danger: #DC2626;
  --danger-light: #FEF2F2;
  --text: #1E293B;
  --text-muted: #64748B;
  --border: #E2E8F0;
  --bg: #F8FAFC;
  --card: #FFFFFF;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -1px rgba(0,0,0,.06);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
}

/* ── Auth page ── */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.auth-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  padding: 40px 36px;
  width: 100%;
  max-width: 380px;
  text-align: center;
}

.auth-logo { margin-bottom: 16px; }
.auth-title { font-size: 22px; font-weight: 700; }
.auth-subtitle { color: var(--text-muted); font-size: 13px; margin-top: 4px; margin-bottom: 28px; }

.auth-form { text-align: left; }

/* ── Topbar ── */
.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-inner {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
}

/* ── Main ── */
.main {
  max-width: 820px;
  margin: 0 auto;
  padding: 40px 24px 60px;
}

.page-header { margin-bottom: 28px; }
.page-header h1 { font-size: 24px; font-weight: 700; }
.page-header p { color: var(--text-muted); margin-top: 6px; }

/* ── Card ── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  margin-bottom: 24px;
}

/* ── Form ── */
.form-section { margin-bottom: 24px; }

.field-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 8px;
}

.field { margin-bottom: 16px; }
.field label {
  display: block;
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 6px;
}

input[type="text"],
input[type="password"],
.select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  color: var(--text);
  background: var(--card);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
input[type="text"]:focus,
input[type="password"]:focus,
.select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,.12);
}

/* ── Upload zone ── */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 36px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  position: relative;
}
.upload-zone:hover, .upload-zone.has-file {
  border-color: var(--primary);
  background: var(--primary-light);
}
.upload-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}
.upload-icon { margin-bottom: 12px; }
.upload-text { font-size: 15px; color: var(--text); margin-bottom: 4px; }
.upload-hint { font-size: 13px; color: var(--text-muted); }

/* ── Select & desc ── */
.format-desc {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-muted);
  min-height: 20px;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: background .15s, opacity .15s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { opacity: .6; cursor: not-allowed; }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-lg { padding: 12px 28px; font-size: 15px; }
.btn-full { width: 100%; justify-content: center; }

.form-actions { padding-top: 4px; }

/* ── Alert ── */
.alert {
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 14px;
  margin-bottom: 20px;
}
.alert-error { background: var(--danger-light); color: var(--danger); border: 1px solid #FECACA; }

/* ── Badge ── */
.badge {
  background: var(--primary-light);
  color: var(--primary);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 99px;
}

/* ── Info grid ── */
.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 600px) { .info-grid { grid-template-columns: 1fr; } }

.info-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.info-card h3 { font-size: 14px; font-weight: 700; margin-bottom: 12px; }
.info-card ol, .info-card ul { padding-left: 18px; }
.info-card li { font-size: 13px; color: var(--text-muted); margin-bottom: 6px; }
.info-card li strong { color: var(--text); }
.info-card li span { display: block; font-size: 12px; }
.info-card code {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 12px;
}

/* ── Spinner ── */
@keyframes spin { to { transform: rotate(360deg); } }
.spin { animation: spin .8s linear infinite; }