* {
  box-sizing: border-box;
}

:root {
  --bg: #f2f6fb;
  --surface: #ffffff;
  --text: #142433;
  --muted: #5b6f82;
  --accent: #0d6e6e;
  --accent-2: #1f8a70;
  --danger: #b42318;
  --border: #d6e2ee;
  --radius: 12px;
  --shadow: 0 12px 30px rgba(20, 36, 51, 0.08);
}

body {
  margin: 0;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top left, #e7f5ff, #f5fbff 45%, #f7fafc 100%);
}

a {
  color: var(--accent);
  text-decoration: none;
}

.container {
  width: min(1080px, 94vw);
  margin: 0 auto;
}

.site-header {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(5px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  line-height: 1;
}

.brand-logo {
  width: auto;
  max-width: 230px;
  height: 44px;
}

.header-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.btn,
button,
input[type="submit"] {
  border: 0;
  border-radius: 10px;
  padding: 0.7rem 1rem;
  background: linear-gradient(140deg, var(--accent), var(--accent-2));
  color: #fff;
  font-weight: 700;
  cursor: pointer;
}

.btn.secondary {
  background: #e9f1f8;
  color: var(--text);
}

main {
  padding: 1.2rem 0 2rem;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.tool-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem;
}

.tool-card h3 {
  margin: 0 0 0.5rem;
}

.tool-type {
  display: inline-block;
  margin-bottom: 0.6rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  background: #e9f7f6;
  color: #0e5a5a;
}

.form-grid {
  display: grid;
  gap: 0.8rem;
}

label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

input[type="text"],
input[type="number"],
input[type="file"],
select,
textarea {
  width: 100%;
  border: 1px solid #bfd0df;
  border-radius: 9px;
  padding: 0.6rem;
  background: #fff;
  color: var(--text);
}

textarea {
  min-height: 120px;
}

.alert {
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
  margin: 0.7rem 0;
}

.alert.error {
  background: #fff3f2;
  border: 1px solid #f4c7c3;
  color: var(--danger);
}

.alert.success {
  background: #ecfdf3;
  border: 1px solid #b7ebc6;
  color: #166534;
}

.muted {
  color: var(--muted);
}

.progress-indicator {
  margin-top: 0.5rem;
  font-size: 0.95rem;
  color: #0f4a62;
  display: none;
}

.progress-indicator.visible {
  display: block;
}

.ad-box {
  border: 1px dashed #9eb2c8;
  border-radius: 10px;
  padding: 0.6rem;
  text-align: center;
  background: #f8fbff;
  margin: 0.8rem 0;
}

.preview-image {
  max-width: min(360px, 100%);
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
}

.faq-list {
  margin-top: 1rem;
}

.faq-item {
  margin-bottom: 0.8rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem;
  background: #fefefe;
}

.site-footer {
  margin-top: 2rem;
  border-top: 1px solid var(--border);
  padding: 1rem 0 2rem;
  color: var(--muted);
}

@media (max-width: 700px) {
  .brand-logo {
    max-width: 190px;
    height: 40px;
  }

  .header-row {
    flex-direction: column;
    align-items: stretch;
  }

  .header-actions {
    justify-content: space-between;
  }
}