:root {
  --bg: #f6f7f8;
  --fg: #111;
  --muted: #666;
  --accent: #e2001a;
  --border: #d8d8d8;
  --card-bg: #fff;
  --success-bg: #e6f6e6;
  --success-fg: #1f5d1f;
  --error-bg: #fdecea;
  --error-fg: #8a1a1a;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.topbar h1 {
  font-size: 24px;
  margin: 0;
  font-weight: 600;
}

.topbar .logo {
  max-height: 44px;
  width: auto;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}

.field {
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
}

.field label {
  font-size: 14px;
  margin-bottom: 6px;
  color: var(--muted);
}

.field input[type="text"],
.field input[type="email"],
.field input[type="file"] {
  font-size: 16px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  width: 100%;
}

.field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(226, 0, 26, 0.15);
}

.field small {
  color: var(--muted);
  margin-top: 4px;
  font-size: 12px;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border: 0;
  padding: 12px 18px;
  font-size: 16px;
  border-radius: 6px;
  cursor: pointer;
  width: 100%;
  font-weight: 600;
}

.btn-primary:hover { filter: brightness(0.95); }

.btn-secondary {
  display: inline-block;
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  text-decoration: none;
  color: var(--fg);
  background: #fff;
}

.alert {
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 20px;
  font-size: 15px;
}

.alert.success { background: var(--success-bg); color: var(--success-fg); }
.alert.error { background: var(--error-bg); color: var(--error-fg); }

footer {
  margin-top: 24px;
  text-align: center;
  color: var(--muted);
}

code {
  background: #eee;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.95em;
}