:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --surface-hover: #243044;
  --border: #2d3a4f;
  --text: #e8edf5;
  --text-muted: #8b9cb3;
  --primary: #22c55e;
  --primary-hover: #16a34a;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --accent: #3b82f6;
  --radius: 12px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.hidden {
  display: none !important;
}

/* Giriş ekranı */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(34, 197, 94, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
    var(--bg);
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 36px;
  box-shadow: var(--shadow);
}

.login-card .logo {
  text-align: center;
  margin-bottom: 32px;
}

.login-card .logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.login-card .logo p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 6px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
}

.form-group textarea {
  min-height: 200px;
  resize: vertical;
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 0.85rem;
  line-height: 1.6;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  font-family: inherit;
}

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

.btn-primary {
  background: var(--primary);
  color: #052e16;
  width: 100%;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: var(--surface-hover);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border);
}

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
}

.btn-danger:hover {
  background: var(--danger);
  color: white;
}

.error-msg {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #fca5a5;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.success-msg {
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.4);
  color: #86efac;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  margin-bottom: 16px;
}

/* Panel düzeni */
.panel-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
  font-size: 1.1rem;
  color: var(--primary);
}

.sidebar-header p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.qr-list {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}

.qr-list-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 12px 14px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--text);
  cursor: pointer;
  margin-bottom: 4px;
  transition: background 0.15s, border-color 0.15s;
  font-family: inherit;
}

.qr-list-item:hover {
  background: var(--surface-hover);
}

.qr-list-item.active {
  background: var(--surface-hover);
  border-color: var(--primary);
}

.qr-list-item .slug {
  font-weight: 600;
  font-size: 0.9rem;
  word-break: break-all;
}

.qr-list-item .meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.qr-list-empty {
  padding: 24px 16px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.sidebar-footer {
  padding: 16px;
  border-top: 1px solid var(--border);
}

.sidebar-footer .user-info {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  word-break: break-all;
}

.main-content {
  padding: 28px 32px;
  overflow-y: auto;
}

.main-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 28px;
  max-width: 1200px;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.url-preview {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.url-preview .domain {
  padding: 10px 14px;
  background: var(--surface-hover);
  color: var(--text-muted);
  font-size: 0.85rem;
  white-space: nowrap;
  border-right: 1px solid var(--border);
}

.url-preview input {
  flex: 1;
  border: none !important;
  border-radius: 0 !important;
  background: transparent !important;
}

/* QR önizleme */
.qr-preview-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 24px;
  text-align: center;
  position: sticky;
  top: 28px;
}

.qr-preview-card h3 {
  font-size: 1rem;
  margin-bottom: 20px;
  color: var(--text-muted);
}

.qr-canvas-wrap {
  background: white;
  border-radius: 12px;
  padding: 16px;
  display: inline-block;
  margin-bottom: 20px;
  min-height: 232px;
  min-width: 232px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-canvas-wrap canvas {
  display: block;
  max-width: 100%;
}

.qr-canvas-wrap canvas.is-hidden {
  position: absolute;
  width: 200px;
  height: 200px;
  opacity: 0;
  pointer-events: none;
}

.qr-waiting {
  color: #6b7280;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 80px 20px;
}

.qr-url-display {
  font-size: 0.8rem;
  color: var(--text-muted);
  word-break: break-all;
  margin-bottom: 16px;
  min-height: 2.4em;
}

.btn-download {
  width: 100%;
}

.btn-download:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-new {
  width: 100%;
  margin-bottom: 12px;
}

.templates-group {
  margin-bottom: 18px;
}

.templates-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.template-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn-template {
  flex: 1;
  min-width: 140px;
}

.creator-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(34, 197, 94, 0.2);
  color: var(--primary);
  margin-bottom: 6px;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 1000;
}

.modal {
  width: 100%;
  max-width: 480px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 1.1rem;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
  padding: 4px 8px;
  border-radius: 6px;
}

.modal-close:hover {
  background: var(--surface-hover);
  color: var(--text);
}

.modal-body {
  padding: 20px 24px;
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}

@media (max-width: 960px) {
  .panel-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    max-height: 280px;
  }

  .main-grid {
    grid-template-columns: 1fr;
  }

  .qr-preview-card {
    position: static;
  }
}