:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --surface-2: #243044;
  --text: #e7ecf3;
  --muted: #8b9cb3;
  --accent: #5eead4;
  --accent-2: #38bdf8;
  --danger: #f87171;
  --radius: 14px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 20% 0%, rgba(56, 189, 248, 0.12), transparent 40%),
    radial-gradient(circle at 80% 100%, rgba(94, 234, 212, 0.1), transparent 35%);
  pointer-events: none;
  z-index: -1;
}

.wrap {
  width: min(920px, 92vw);
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

header {
  margin-bottom: 2rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.15rem;
}

.logo span {
  color: var(--accent);
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  line-height: 1.2;
  margin: 1rem 0 0.75rem;
}

.hero p {
  color: var(--muted);
  max-width: 58ch;
  margin: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.card {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: transform 0.15s, border-color 0.15s;
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(94, 234, 212, 0.35);
}

.card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.card p {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.card a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.panel {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.panel h2 {
  margin-top: 0;
}

.form-row {
  display: grid;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

label {
  font-size: 0.9rem;
  color: var(--muted);
}

input,
select {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: var(--surface-2);
  color: var(--text);
  font-size: 1rem;
}

input:focus,
select:focus {
  outline: 2px solid rgba(94, 234, 212, 0.45);
  border-color: transparent;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.2rem;
  border: none;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #042f2e;
  font-weight: 700;
  cursor: pointer;
  font-size: 0.95rem;
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.result {
  margin-top: 1.25rem;
  padding: 1rem 1.1rem;
  border-radius: 12px;
  background: rgba(94, 234, 212, 0.08);
  border: 1px solid rgba(94, 234, 212, 0.25);
}

.result strong {
  color: var(--accent);
  font-size: 1.35rem;
}

.result-grid {
  display: grid;
  gap: 0.6rem;
  margin-top: 0.75rem;
}

.result-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.95rem;
}

.result-row span:last-child {
  font-weight: 600;
}

.note {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 1rem;
}

.seo-block {
  margin-top: 2.5rem;
}

.seo-block h2 {
  font-size: 1.2rem;
}

.seo-block p {
  color: var(--muted);
}

footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--muted);
  font-size: 0.85rem;
}

.donate {
  margin-top: 1.5rem;
  padding: 1rem 1.2rem;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px dashed rgba(94, 234, 212, 0.35);
}

.donate-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.75rem;
  padding: 0.75rem 1.2rem;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  color: #ffffff;
  background: #0f766e;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
  transition: background 0.15s, transform 0.15s;
}

.donate-btn:hover {
  background: #0d9488;
  color: #ffffff;
  transform: translateY(-1px);
}

.donate-btn:active {
  transform: translateY(0);
}

.donate-btn:visited {
  color: #ffffff;
}

.ad-slot {
  margin: 1.5rem 0;
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 0.8rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.ad-slot:empty {
  display: none;
}

.ad-slot:not(:empty) {
  min-height: auto;
  border: none;
  background: transparent;
}

.donate a:not(.donate-btn) {
  color: var(--accent);
}

.feedback {
  margin-top: 2rem;
  padding: 1.25rem 1.4rem;
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
}

.feedback h2 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}

.feedback-form textarea {
  min-height: 110px;
  resize: vertical;
}

.feedback-honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.feedback-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.2rem;
  border: none;
  border-radius: 10px;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.12);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.feedback-submit:hover:not(:disabled) {
  background: #2a3a52;
  border-color: rgba(94, 234, 212, 0.35);
}

.feedback-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.feedback-status {
  margin: 0.75rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
  min-height: 1.25rem;
}

.feedback-status--success {
  color: #5eead4;
}

.feedback-status--error {
  color: #f87171;
}

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

footer a:hover {
  text-decoration: underline;
}

@media print {
  body {
    background: #fff;
    color: #000;
  }

  .no-print {
    display: none !important;
  }

  .panel {
    border: 1px solid #ccc;
    break-inside: avoid;
  }
}