:root {
  --color-primary: #2563eb;
  --color-primary-soft: #3b82f6;
  --color-primary-dark: #1e40af;
  --color-accent: #10b981;
  --color-bg: #f9fafb;
  --color-bg-section: #ffffff;
  --color-text: #111827;
  --color-text-soft: #6b7280;
  --color-border: #e5e7eb;
  --color-success: #10b981;
  --color-error: #ef4444;
  --font: 'Heebo', sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(37, 99, 235, 0.08);
  --shadow-hover: 0 8px 32px rgba(37, 99, 235, 0.12);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100vh;
}

.admin-wrap {
  max-width: 680px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}
@media (min-width: 768px) {
  .admin-wrap { padding: 2rem 2rem 4rem; }
}

.admin-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}
.admin-header h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.admin-header h1 i {
  font-size: 1.2rem;
}
.header-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.back-link {
  font-size: 0.95rem;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.back-link:hover { text-decoration: underline; }
.back-link i {
  font-size: 0.85rem;
}

.screen { display: block; }
.screen.hidden { display: none !important; }

.login-box {
  background: var(--color-bg-section);
  padding: 2.5rem;
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.1);
  border: 1px solid var(--color-border);
  max-width: 400px;
  margin: 2rem auto;
}
.login-box h2 {
  margin: 0 0 1.25rem;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
}
.login-box label {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
}
.login-box input {
  width: 100%;
  padding: 0.875rem 1.125rem;
  margin-bottom: 1rem;
  font-family: var(--font);
  font-size: 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.login-box input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
.login-box .btn { width: 100%; padding: 0.75rem; margin-top: 0.25rem; }
.login-box .hint,
.form-section .hint {
  margin: 0.5rem 0 0;
  font-size: 0.85rem;
  color: var(--color-text-soft);
  line-height: 1.5;
}
.login-box code {
  background: var(--color-bg);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: monospace;
  font-size: 0.9em;
}

.admin-form label {
  display: block;
  margin: 1rem 0 0.35rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
}
.admin-form label:first-of-type { margin-top: 0; }
.admin-form input,
.admin-form textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font);
  font-size: 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.admin-form input:focus,
.admin-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}
.admin-form textarea { resize: vertical; min-height: 120px; }

.form-section {
  background: var(--color-bg-section);
  padding: 2rem;
  margin-bottom: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  transition: box-shadow 0.2s ease;
}
.form-section:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}
.form-section h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}
.btn {
  padding: 0.75rem 1.5rem;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: none;
  transition: background 0.2s, color 0.2s;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  font-weight: 500;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
  transition: all 0.2s ease;
}
.btn-primary:hover {
  background: var(--color-primary-soft);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}
.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.btn-secondary {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover {
  background: var(--color-border);
  border-color: var(--color-text-soft);
}
.btn-secondary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.status {
  margin-top: 1rem;
  font-size: 0.95rem;
  color: var(--color-text-soft);
}
.status.success {
  color: var(--color-success);
  background: rgba(16, 185, 129, 0.1);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(16, 185, 129, 0.2);
}
.status.error {
  color: var(--color-error);
  background: rgba(239, 68, 68, 0.1);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(239, 68, 68, 0.2);
}