@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("/fonts/inter-var.woff2") format("woff2");
}

:root {
  --bg-0: #05070c;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-hover: rgba(255, 255, 255, 0.06);
  --line: rgba(255, 255, 255, 0.09);
  --line-soft: rgba(255, 255, 255, 0.06);
  --text: #f2f4f8;
  --text-dim: rgba(242, 244, 248, 0.62);
  --text-faint: rgba(242, 244, 248, 0.4);
  --accent: #5b8def;
  --accent-2: #8b7bf0;
  --green: #4ade80;
  --red: #f87171;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial;
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 44px;
  background: rgba(6, 9, 15, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-soft);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
}

.logo svg {
  width: 24px;
  height: 24px;
}

button {
  cursor: pointer;
  border: none;
  font-family: inherit;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

input,
textarea {
  padding: 13px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 14.5px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s ease, background 0.15s ease;
}

input:focus,
textarea:focus {
  border-color: var(--accent);
  background: rgba(91, 141, 239, 0.06);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-faint);
}

.btn-primary {
  padding: 13px 14px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  font-weight: 600;
  font-size: 14.5px;
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.btn-primary:hover {
  opacity: 0.92;
}

.btn-primary:active {
  transform: scale(0.98);
}

@media (max-width: 640px) {
  header {
    padding: 16px 20px;
  }
}