:root {
  --bg-1: #0f0c29;
  --bg-2: #302b63;
  --bg-3: #24243e;
  --card-bg: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.12);
  --text: #f4f4fb;
  --text-dim: #b4b0d4;
  --accent: #7c6bff;
  --accent-2: #ff6bcb;
  --danger: #ff5c72;
  --success: #4ade80;
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
}

body {
  font-family: "Pretendard", "Apple SD Gothic Neo", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: linear-gradient(135deg, var(--bg-1), var(--bg-2) 55%, var(--bg-3));
  background-attachment: fixed;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

#app {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.loading-screen {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.spinner {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.15);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---------- Login ---------- */

.login-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 40px 32px;
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  text-align: center;
  animation: fadeUp 0.5s ease;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.brand {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin: 0 0 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.brand-sub {
  color: var(--text-dim);
  font-size: 14px;
  margin: 0 0 28px;
}

.field {
  text-align: left;
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 6px;
}

input[type="password"],
input[type="text"],
input[type="url"] {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--card-border);
  background: rgba(0, 0, 0, 0.25);
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input::placeholder {
  color: rgba(244, 244, 251, 0.35);
}

input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(124, 107, 255, 0.25);
}

.btn {
  width: 100%;
  padding: 12px 16px;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s ease, opacity 0.15s ease;
}

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

.btn-primary {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: white;
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-dim);
}

.error-msg {
  color: var(--danger);
  font-size: 13px;
  margin-top: 12px;
  min-height: 16px;
}

/* ---------- Dashboard ---------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px;
  border-bottom: 1px solid var(--card-border);
}

.topbar .brand {
  font-size: 20px;
  margin: 0;
}

.dashboard {
  flex: 1;
  padding: 32px 24px 60px;
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
}

.create-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 28px;
  backdrop-filter: blur(20px);
}

.create-card h2 {
  margin: 0 0 18px;
  font-size: 17px;
}

.form-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.form-row .field {
  flex: 1;
  min-width: 200px;
  margin-bottom: 0;
}

.form-row .field.small {
  flex: 0 0 160px;
}

.create-card .btn-primary {
  width: auto;
  padding: 12px 24px;
  align-self: flex-end;
  white-space: nowrap;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 16px;
}

.links-section h2 {
  font-size: 15px;
  color: var(--text-dim);
  font-weight: 600;
  margin: 0 0 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.link-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.link-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  animation: fadeUp 0.3s ease;
}

.link-info {
  flex: 1;
  min-width: 0;
}

.link-short {
  font-weight: 700;
  font-size: 15px;
  color: var(--text);
  text-decoration: none;
  word-break: break-all;
}

.link-short:hover {
  color: var(--accent);
}

.link-original {
  font-size: 13px;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}

.link-date {
  font-size: 11px;
  color: rgba(180, 176, 212, 0.6);
  margin-top: 4px;
}

.link-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--card-border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  transition: background 0.15s, color 0.15s;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
}

.icon-btn.danger:hover {
  background: rgba(255, 92, 114, 0.15);
  color: var(--danger);
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-dim);
  font-size: 14px;
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(20, 18, 40, 0.95);
  border: 1px solid var(--card-border);
  color: var(--text);
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  z-index: 100;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.success { border-color: rgba(74, 222, 128, 0.4); }
.toast.error { border-color: rgba(255, 92, 114, 0.4); }

@media (max-width: 480px) {
  .topbar { padding: 16px 18px; }
  .dashboard { padding: 24px 14px 40px; }
  .create-card { padding: 18px; }
}