*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0a0a0a;
  --surface: #111111;
  --border: #222222;
  --accent: #c8f060;
  --accent-dim: #9ab840;
  --text: #f0f0f0;
  --muted: #555;
  --error: #ff5f5f;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Syne', sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  overflow-x: hidden;
}

/* Background grid */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.4;
  pointer-events: none;
  z-index: 0;
}

.container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 600px;
}

header {
  margin-bottom: 3rem;
}

.logo {
  font-size: 3.5rem;
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1;
  color: var(--text);
}

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

.tagline {
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.5rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2rem;
}

.input-row {
  display: flex;
  gap: 0.75rem;
  align-items: stretch;
}

input[type="text"] {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-family: 'DM Mono', monospace;
  font-size: 0.875rem;
  padding: 0.85rem 1rem;
  outline: none;
  transition: border-color 0.2s;
}

input[type="text"]::placeholder {
  color: var(--muted);
}

input[type="text"]:focus {
  border-color: var(--accent);
}

button {
  background: var(--accent);
  border: none;
  border-radius: 4px;
  color: #0a0a0a;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 0.875rem;
  padding: 0.85rem 1.5rem;
  cursor: pointer;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: background 0.2s, transform 0.1s;
  white-space: nowrap;
}

button:hover { background: #d8ff6a; }
button:active { transform: scale(0.97); }
button:disabled {
  background: var(--muted);
  cursor: not-allowed;
  transform: none;
}

/* Result area */
.result {
  margin-top: 1.5rem;
  display: none;
  animation: slideUp 0.3s ease;
}

.result.visible { display: block; }

@keyframes slideUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.result-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.6rem;
}

.result-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 0.85rem 1rem;
  gap: 1rem;
}

.short-link {
  font-family: 'DM Mono', monospace;
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.02em;
  word-break: break-all;
}

.short-link:hover {
  text-decoration: underline;
}

.copy-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--muted);
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  padding: 0.4rem 0.75rem;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: all 0.2s;
  white-space: nowrap;
  flex-shrink: 0;
}

.copy-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: transparent;
  transform: none;
}

.copy-btn.copied {
  border-color: var(--accent);
  color: var(--accent);
}

.original-url {
  margin-top: 0.6rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.error-msg {
  margin-top: 1rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
  color: var(--error);
  display: none;
}

.error-msg.visible { display: block; }

footer {
  margin-top: 2.5rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  color: var(--muted);
  text-align: center;
  letter-spacing: 0.08em;
}