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

:root {
  --bg: #f9f9f7;
  --surface: #ffffff;
  --border: #e5e4df;
  --text: #1a1a18;
  --muted: #6b6b67;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --danger: #dc2626;
  --success: #16a34a;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111110;
    --surface: #1c1c1a;
    --border: #2e2e2b;
    --text: #e8e8e4;
    --muted: #888882;
    --accent: #6366f1;
    --accent-hover: #818cf8;
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 2rem 1rem;
  line-height: 1.6;
}

.container {
  max-width: 640px;
  margin: 0 auto;
}

header {
  margin-bottom: 2rem;
}

header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

header h1 span {
  color: var(--accent);
}

header p {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

/* Form */
.shorten-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.input-row {
  display: flex;
  gap: 0.5rem;
}

input[type="url"],
input[type="text"] {
  flex: 1;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s;
}

input:focus {
  border-color: var(--accent);
}

button {
  padding: 0.6rem 1.1rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
}

button:hover { background: var(--accent-hover); }
button:active { transform: scale(0.98); }

.custom-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.6rem;
}

.prefix {
  font-size: 0.82rem;
  color: var(--muted);
  white-space: nowrap;
}

.custom-row input {
  flex: 1;
  font-size: 0.85rem;
  padding: 0.45rem 0.7rem;
}

/* Result */
.result {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
  padding: 0.65rem 0.85rem;
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  border-radius: 8px;
}

.result span {
  flex: 1;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  word-break: break-all;
}

.result button {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  background: var(--accent);
}

.error {
  margin-top: 0.6rem;
  padding: 0.55rem 0.85rem;
  background: color-mix(in srgb, var(--danger) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--danger) 25%, transparent);
  border-radius: 8px;
  font-size: 0.88rem;
  color: var(--danger);
}

.hidden { display: none !important; }

/* Links list */
.links-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.links-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--border);
}

.links-header h2 {
  font-size: 0.95rem;
  font-weight: 600;
}

.icon-btn {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 0.3rem 0.6rem;
  font-size: 1rem;
  border-radius: 6px;
}

.icon-btn:hover { background: var(--bg); color: var(--text); }

.empty {
  padding: 2rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.link-item {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 0.5rem;
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--border);
}

.link-item:last-child { border-bottom: none; }

.link-info { min-width: 0; }

.link-short {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
}

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

.link-long {
  font-size: 0.8rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 0.15rem;
}

.link-meta {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

.link-actions {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  padding-top: 0.1rem;
}

.btn-copy-small, .btn-delete {
  font-size: 0.75rem;
  padding: 0.3rem 0.6rem;
}

.btn-delete {
  background: transparent;
  color: var(--danger);
  border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent);
}

.btn-delete:hover { background: color-mix(in srgb, var(--danger) 10%, transparent); }