/* ===== About App ===== */
.app-about {
  padding: 28px;
  display: flex;
  gap: 28px;
}

.app-about__avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--os-card);
  border: 2px solid var(--os-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.app-about__info {
  flex: 1;
  min-width: 0;
}

.app-about__name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.app-about__bio {
  font-size: 0.9rem;
  color: var(--os-text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.app-about__section-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--os-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  margin-top: 20px;
}

.app-about__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.app-about__pill {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: var(--os-card);
  border: 1px solid var(--os-border);
  border-radius: 100px;
  color: var(--os-text-muted);
}

.app-about__stats {
  display: flex;
  gap: 20px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--os-border);
}

.app-about__stat {
  text-align: center;
}

.app-about__stat-num {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--os-accent);
}

.app-about__stat-label {
  font-size: 0.7rem;
  color: var(--os-text-muted);
}

.app-about__links {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.app-about__link-btn {
  font-size: 0.8rem;
  padding: 6px 14px;
  border: 1px solid var(--os-border);
  border-radius: 6px;
  color: var(--os-text-muted);
  transition: border-color 0.2s, color 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.app-about__link-btn:hover {
  border-color: var(--os-accent);
  color: var(--os-accent);
}

/* ===== Projects App ===== */
.app-projects {
  padding: 20px;
}

.app-projects__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.app-projects__filter {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 5px 12px;
  border: 1px solid var(--os-border);
  border-radius: 100px;
  color: var(--os-text-muted);
  cursor: pointer;
  transition: all 0.15s;
}

.app-projects__filter:hover {
  border-color: var(--os-text-muted);
}

.app-projects__filter--active {
  border-color: var(--os-accent);
  color: var(--os-accent);
  background: rgba(99,102,241,0.1);
}

.app-projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}

.project-card {
  background: var(--os-card);
  border: 1px solid var(--os-border);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 0.2s, transform 0.15s;
}

.project-card:hover {
  border-color: var(--os-accent);
  transform: translateY(-2px);
}

.project-card__header {
  display: flex;
  align-items: center;
  gap: 8px;
}

.project-card__emoji {
  font-size: 1.3rem;
}

.project-card__name {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
}

.project-card__desc {
  font-size: 0.8rem;
  color: var(--os-text-muted);
  line-height: 1.5;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: auto;
}

.project-card__tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 2px 7px;
  background: var(--os-surface);
  border: 1px solid var(--os-border);
  border-radius: 4px;
  color: var(--os-text-muted);
}

.project-card__actions {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.project-card__btn {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 5px;
  transition: background 0.15s;
}

.project-card__btn--open {
  background: var(--os-accent);
  color: white;
}

.project-card__btn--open:hover {
  background: var(--os-accent-hover);
}

.project-card__btn--source {
  color: var(--os-text-muted);
  border: 1px solid var(--os-border);
}

.project-card__btn--source:hover {
  border-color: var(--os-text-muted);
}

/* ===== Terminal App ===== */
.app-terminal {
  background: #0a0a0a;
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.app-terminal__output {
  flex: 1;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.7;
  color: #9ca3af;
}

.app-terminal__output .t-cmd { color: #e2e8f0; }
.app-terminal__output .t-accent { color: #22c55e; }
.app-terminal__output .t-prompt { color: #6366f1; }
.app-terminal__output .t-err { color: #ef4444; }
.app-terminal__output a { color: #6366f1; text-decoration: underline; }
.app-terminal__output a:hover { color: #818cf8; }

.app-terminal__input-row {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  margin-top: 4px;
}

.app-terminal__prompt-text {
  color: #6366f1;
  white-space: nowrap;
  margin-right: 6px;
}

.app-terminal__input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  caret-color: #22c55e;
}

/* ===== File Explorer App ===== */
.app-files {
  display: flex;
  height: 100%;
}

.app-files__sidebar {
  width: 180px;
  border-right: 1px solid var(--os-border);
  padding: 8px;
  flex-shrink: 0;
  overflow-y: auto;
}

.app-files__sidebar-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 6px;
  font-size: 0.82rem;
  cursor: pointer;
  transition: background 0.1s;
  color: var(--os-text-muted);
}

.app-files__sidebar-item:hover,
.app-files__sidebar-item--active {
  background: rgba(99,102,241,0.08);
  color: var(--os-text);
}

.app-files__main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.app-files__breadcrumb {
  padding: 8px 16px;
  border-bottom: 1px solid var(--os-border);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--os-text-muted);
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.app-files__breadcrumb-link {
  cursor: pointer;
  transition: color 0.15s;
}

.app-files__breadcrumb-link:hover {
  color: var(--os-accent);
}

.app-files__list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.app-files__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.1s;
  font-size: 0.82rem;
}

.app-files__item:hover {
  background: rgba(255,255,255,0.03);
}

.app-files__item-icon {
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

.app-files__item-name {
  flex: 1;
}

.app-files__item-meta {
  font-size: 0.72rem;
  color: var(--os-text-muted);
}

.app-files__loading {
  padding: 24px;
  text-align: center;
  color: var(--os-text-muted);
  font-size: 0.85rem;
}

/* ===== Browser App ===== */
.app-browser {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.app-browser__toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-bottom: 1px solid var(--os-border);
  background: var(--os-titlebar);
  flex-shrink: 0;
}

.app-browser__nav-btn {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  color: var(--os-text-muted);
  font-size: 1rem;
  transition: background 0.1s;
}

.app-browser__nav-btn:hover {
  background: rgba(255,255,255,0.05);
}

.app-browser__url {
  flex: 1;
  padding: 5px 10px;
  background: var(--os-card);
  border: 1px solid var(--os-border);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--os-text-muted);
  outline: none;
}

.app-browser__external {
  font-size: 0.75rem;
  color: var(--os-text-muted);
  transition: color 0.15s;
  white-space: nowrap;
}

.app-browser__external:hover {
  color: var(--os-accent);
}

.app-browser__iframe {
  flex: 1;
  border: none;
  background: white;
}

/* ===== Notepad App ===== */
.app-notepad {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.app-notepad__toolbar {
  display: flex;
  gap: 8px;
  padding: 6px 12px;
  border-bottom: 1px solid var(--os-border);
  flex-shrink: 0;
}

.app-notepad__btn {
  font-size: 0.78rem;
  padding: 4px 12px;
  border: 1px solid var(--os-border);
  border-radius: 5px;
  color: var(--os-text-muted);
  transition: border-color 0.15s;
}

.app-notepad__btn:hover {
  border-color: var(--os-text-muted);
}

.app-notepad__body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.app-notepad__lines {
  padding: 12px 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--os-text-muted);
  text-align: right;
  border-right: 1px solid var(--os-border);
  min-width: 40px;
  overflow: hidden;
  line-height: 1.6;
  user-select: none;
  flex-shrink: 0;
}

.app-notepad__textarea {
  flex: 1;
  padding: 12px;
  background: none;
  border: none;
  outline: none;
  resize: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--os-text);
  tab-size: 2;
}

/* ===== Settings App ===== */
.app-settings {
  padding: 24px;
}

.app-settings__group {
  margin-bottom: 28px;
}

.app-settings__label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--os-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.app-settings__wallpapers {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.app-settings__wp {
  height: 60px;
  border-radius: 8px;
  border: 2px solid var(--os-border);
  cursor: pointer;
  transition: border-color 0.15s;
}

.app-settings__wp:hover {
  border-color: var(--os-text-muted);
}

.app-settings__wp--active {
  border-color: var(--os-accent);
}

.app-settings__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
}

.app-settings__row-label {
  font-size: 0.88rem;
}

.app-settings__toggle {
  width: 40px;
  height: 22px;
  border-radius: 11px;
  background: var(--os-border);
  position: relative;
  cursor: pointer;
  transition: background 0.2s;
}

.app-settings__toggle--on {
  background: var(--os-accent);
}

.app-settings__toggle::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: white;
  transition: transform 0.2s;
}

.app-settings__toggle--on::after {
  transform: translateX(18px);
}

.app-settings__input {
  padding: 6px 12px;
  background: var(--os-card);
  border: 1px solid var(--os-border);
  border-radius: 6px;
  font-size: 0.85rem;
  outline: none;
  width: 180px;
}

.app-settings__input:focus {
  border-color: var(--os-accent);
}

/* ===== Music App ===== */
.app-music {
  padding: 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  height: 100%;
}

.app-music__art {
  width: 120px;
  height: 120px;
  border-radius: 12px;
  background: var(--os-card);
  border: 1px solid var(--os-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.app-music__art--playing {
  animation: music-pulse 2s ease-in-out infinite;
}

@keyframes music-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.03); }
}

.app-music__title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  text-align: center;
}

.app-music__artist {
  font-size: 0.8rem;
  color: var(--os-text-muted);
  margin-top: -12px;
}

.app-music__controls {
  display: flex;
  align-items: center;
  gap: 16px;
}

.app-music__btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 1.1rem;
  color: var(--os-text-muted);
  transition: color 0.15s, background 0.15s;
}

.app-music__btn--play {
  width: 48px;
  height: 48px;
  background: var(--os-accent);
  color: white;
  font-size: 1.2rem;
}

.app-music__btn:hover {
  color: var(--os-text);
}

.app-music__btn--play:hover {
  background: var(--os-accent-hover);
  color: white;
}

.app-music__volume {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  max-width: 200px;
}

.app-music__slider {
  flex: 1;
  -webkit-appearance: none;
  height: 4px;
  border-radius: 2px;
  background: var(--os-border);
  outline: none;
}

.app-music__slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--os-accent);
  cursor: pointer;
}

.app-music__tracks {
  width: 100%;
  flex: 1;
  overflow-y: auto;
}

.app-music__track {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.1s;
  font-size: 0.82rem;
}

.app-music__track:hover {
  background: rgba(255,255,255,0.03);
}

.app-music__track--active {
  color: var(--os-accent);
}

/* ===== Contact App ===== */
.app-contact {
  padding: 28px;
  max-width: 420px;
  margin: 0 auto;
}

.app-contact__heading {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
  text-align: center;
}

.app-contact__cards {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.app-contact__card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--os-card);
  border: 1px solid var(--os-border);
  border-radius: 8px;
  font-size: 0.88rem;
  color: var(--os-text-muted);
  transition: border-color 0.15s, color 0.15s;
}

.app-contact__card:hover {
  border-color: var(--os-accent);
  color: var(--os-text);
}

.app-contact__card-icon {
  font-size: 1.2rem;
  width: 24px;
  text-align: center;
}

.app-contact__form-title {
  font-size: 0.88rem;
  color: var(--os-text-muted);
  margin-bottom: 12px;
}

.app-contact__field {
  width: 100%;
  padding: 8px 12px;
  background: var(--os-card);
  border: 1px solid var(--os-border);
  border-radius: 6px;
  font-size: 0.85rem;
  outline: none;
  margin-bottom: 8px;
  transition: border-color 0.2s;
}

.app-contact__field:focus {
  border-color: var(--os-accent);
}

textarea.app-contact__field {
  resize: vertical;
  min-height: 80px;
  font-family: var(--font-body);
}

.app-contact__send {
  width: 100%;
  padding: 10px;
  background: var(--os-accent);
  color: white;
  border-radius: 6px;
  font-weight: 500;
  font-size: 0.9rem;
  transition: background 0.15s;
  margin-top: 4px;
}

.app-contact__send:hover {
  background: var(--os-accent-hover);
}