:root {
  --bg-0: #07111d;
  --bg-1: #0f2742;
  --ink: #ecf4ff;
  --ink-muted: #b8d1ef;
  --line: rgba(189, 224, 255, 0.25);
  --btn-main: #3ef2d8;
  --btn-main-ink: #06251f;
  --btn-alt: #1f3f63;
  --danger: #ff7575;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Space Grotesk", sans-serif;
  color: var(--ink);
  background: radial-gradient(120% 160% at 15% 10%, #123a67 0%, var(--bg-0) 42%, #040811 100%);
  overflow-x: hidden;
}

body {
  display: grid;
  place-items: center;
  padding: 24px;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at center, black, transparent 78%);
  z-index: 0;
  pointer-events: none;
}

.bg-orb {
  position: fixed;
  border-radius: 999px;
  filter: blur(55px);
  opacity: 0.8;
  z-index: 0;
  pointer-events: none;
}

.orb-1 {
  width: 320px;
  height: 320px;
  left: -90px;
  top: -70px;
  background: #2cb9ff;
  animation: driftA 9s ease-in-out infinite;
}

.orb-2 {
  width: 420px;
  height: 420px;
  right: -130px;
  bottom: -140px;
  background: #36f2b0;
  animation: driftB 12s ease-in-out infinite;
}

.card {
  width: min(720px, 100%);
  position: relative;
  z-index: 1;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 30px;
  backdrop-filter: blur(14px);
  background: linear-gradient(135deg, rgba(11, 26, 43, 0.86), rgba(9, 19, 33, 0.6));
  box-shadow: 0 28px 80px rgba(4, 15, 33, 0.55);
  animation: riseIn 700ms ease-out;
}

.label {
  margin: 0;
  color: var(--ink-muted);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 12px;
}

h1 {
  margin: 12px 0 10px;
  font-size: clamp(30px, 6vw, 56px);
  line-height: 1.02;
  text-wrap: balance;
}

.usage {
  margin: 0 0 26px;
  font-size: clamp(18px, 3.2vw, 28px);
  color: var(--ink-muted);
}

.primary-btn,
.copy-btn,
.go-btn,
.close-btn {
  border: 0;
  border-radius: 14px;
  font-family: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
}

.primary-btn {
  width: 100%;
  padding: 15px 18px;
  font-size: 18px;
  color: var(--btn-main-ink);
  background: linear-gradient(135deg, #66ffe6 0%, var(--btn-main) 55%, #23c4aa 100%);
  box-shadow: 0 12px 36px rgba(56, 242, 212, 0.35);
}

.primary-btn:hover,
.copy-btn:hover,
.go-btn:hover,
.close-btn:hover {
  transform: translateY(-1px);
}

.primary-btn:active,
.copy-btn:active,
.go-btn:active,
.close-btn:active {
  transform: translateY(1px) scale(0.99);
}

.result-area {
  margin-top: 22px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.result-label {
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.result-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

#linkOutput {
  width: 100%;
  min-height: 48px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 12px;
  background: rgba(3, 10, 19, 0.56);
  color: var(--ink);
  padding: 0 12px;
  font-family: inherit;
  font-size: 14px;
}

.copy-btn {
  min-width: 92px;
  padding: 0 14px;
  color: var(--ink);
  background: var(--btn-alt);
}

.copy-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.status {
  min-height: 22px;
  margin: 8px 0 0;
  color: var(--ink-muted);
}

.status.error {
  color: var(--danger);
}

.promo-modal {
  width: min(460px, calc(100% - 24px));
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(145deg, #10283f, #0d1e32);
  color: var(--ink);
  padding: 0;
}

.promo-modal::backdrop {
  background: rgba(3, 6, 11, 0.7);
  backdrop-filter: blur(3px);
}

.modal-content {
  margin: 0;
  padding: 24px;
}

.modal-content h2 {
  margin: 0;
  font-size: clamp(18px, 4vw, 24px);
  line-height: 1.35;
}

.modal-actions {
  display: flex;
  gap: 10px;
  margin-top: 22px;
}

.go-btn {
  background: linear-gradient(135deg, #4f8dff, #2f64cc);
  color: #f8fbff;
  flex: 1;
  min-height: 44px;
}

.close-btn {
  background: #1d324e;
  color: #d9e6f7;
  flex: 1;
  min-height: 44px;
}

@keyframes driftA {
  0%,
  100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(36px, 30px);
  }
}

@keyframes driftB {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(-32px, -22px) scale(1.08);
  }
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 640px) {
  body {
    padding: 14px;
  }

  .card {
    padding: 20px;
    border-radius: 18px;
  }

  .result-row {
    grid-template-columns: 1fr;
  }

  .copy-btn {
    min-height: 44px;
  }
}