:root {
  --bg: #0d0f12;
  --bg-panel: #16191d;
  --bg-panel-hover: #1d2126;
  --border: #262b31;
  --text: #e8ebee;
  --text-dim: #8b939c;
  --epitech-blue: #0098da;
  --epitech-blue-dark: #006e9e;
  --danger: #e2574c;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh;
}

.app-header {
  display: flex;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.15rem;
}

.logo-mark {
  color: var(--epitech-blue);
}

.app-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.input-panel label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
}

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

#mail-input {
  flex: 1;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.15s;
}

#mail-input:focus {
  border-color: var(--epitech-blue);
}

.icon-btn {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 1.2rem;
  width: 3rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition:
    background 0.15s,
    color 0.15s,
    border-color 0.15s;
}

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

.icon-btn.active {
  color: #f4c542;
  border-color: #f4c542;
}

.tool-view[hidden] {
  display: none;
}

.tool-view {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.qr-stage {
  width: 100%;
  min-height: 280px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.qr-stage #qrcode {
  background: #fff;
  padding: 12px;
  border-radius: 6px;
  line-height: 0;
}

.qr-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.placeholder {
  color: var(--text-dim);
  font-size: 0.95rem;
  text-align: center;
}

.primary-btn {
  background: var(--epitech-blue);
  color: #fff;
  border: none;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

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

.favorites-panel h2 {
  font-size: 1rem;
  color: var(--text-dim);
  margin: 0 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.favorites-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.favorite-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.6rem 0.9rem;
}

.favorite-item .fav-mail {
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.favorite-item .fav-mail:hover {
  color: var(--epitech-blue);
}

.favorite-item .fav-remove {
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1rem;
}

.favorite-item .fav-remove:hover {
  color: var(--danger);
}

.empty-hint {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.fullscreen-overlay[hidden] {
  display: none;
}

.fullscreen-overlay {
  position: fixed;
  inset: 0;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.fullscreen-overlay #qrcode-fullscreen {
  background: #fff;
  padding: 12px;
  border-radius: 6px;
  line-height: 0;
}

.fullscreen-overlay .close-btn {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text);
}

@media (max-width: 480px) {
  .app-header {
    flex-direction: column;
    align-items: stretch;
  }
}