/* ============================================================
   STARSHIP OS — Shell Styles
   Dark theme, app rail, topbar, content area
   ============================================================ */

:root {
  --bg-primary: #0f1923;
  --bg-secondary: #1a2733;
  --bg-card: #1e2d3d;
  --bg-card-hover: #243647;
  --bg-rail: #0a1218;
  --text-primary: #e8edf2;
  --text-secondary: #8899aa;
  --text-muted: #5c6e7e;
  --accent: #2b92cb;
  --accent-hover: #3ca8e0;
  --accent-gold: #ffb32e;
  --border: #2a3a4a;
  --error: #d94e24;
  --success: #4caf50;
  --warning: #ffb32e;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
  --rail-width: 48px;
}

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

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

/* ---- Screens ---- */

.screen {
  min-height: 100vh;
}

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

.login-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem;
  gap: 1.5rem;
}

.logo {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.logo-sub {
  font-size: 1rem;
  font-weight: 400;
  color: var(--accent-gold);
}

.login-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 1rem;
}

.error-msg {
  color: var(--error);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-align: center;
  max-width: 360px;
}

.btn-google-signin {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 0.85rem 2rem;
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  max-width: 320px;
  width: 100%;
}

.btn-google-signin:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--accent);
}

.btn-google-signin svg {
  flex-shrink: 0;
}

/* ---- App Rail (left sidebar) ---- */

.app-rail {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--rail-width);
  height: 100vh;
  background-color: var(--bg-rail);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 12px;
  gap: 8px;
  z-index: 200;
  border-right: 1px solid rgba(42, 58, 74, 0.5);
}

.app-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.06);
  border: none;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.1s ease;
  position: relative;
}

.app-icon:hover {
  background-color: rgba(255, 255, 255, 0.12);
  transform: scale(1.05);
}

.app-icon-letter {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.app-icon-active {
  background-color: rgba(255, 255, 255, 0.12);
}

.app-icon-active::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  border-radius: 0 2px 2px 0;
  background-color: var(--app-color, var(--accent));
}

.app-icon-active .app-icon-letter {
  color: var(--text-primary);
}

/* ---- Topbar ---- */

.shell-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  margin-left: var(--rail-width);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.topbar-app-name {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.3px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.topbar-user-name {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.dept-badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background-color: rgba(43, 146, 203, 0.15);
  color: var(--accent);
  border: 1px solid rgba(43, 146, 203, 0.3);
}

/* Mobile app switcher icon (hidden on desktop) */
.mobile-app-switcher {
  display: none;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 1rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.mobile-app-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  padding: 0.5rem;
  min-width: 200px;
  z-index: 300;
  margin-top: 4px;
}

.mobile-app-menu.active {
  display: block;
}

.mobile-app-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.65rem 0.75rem;
  background: none;
  border: none;
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.mobile-app-item:hover {
  background-color: var(--bg-card);
  color: var(--text-primary);
}

.mobile-app-item.active {
  background-color: var(--bg-card);
  color: var(--text-primary);
}

.mobile-app-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ---- Content Area ---- */

#app-content {
  margin-left: var(--rail-width);
  min-height: calc(100vh - 50px);
  padding: 0;
}

/* ---- Shell Buttons ---- */

.btn {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 6px;
  font-size: 0.85rem;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: background-color 0.15s ease, opacity 0.15s ease;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--accent);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--accent-hover);
}

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

.btn-secondary:hover:not(:disabled) {
  background-color: var(--bg-card-hover);
  color: var(--text-primary);
}

.btn-sign-out {
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
  background-color: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.btn-sign-out:hover {
  color: var(--text-secondary);
  border-color: var(--text-muted);
}

/* ---- Responsive ---- */

@media (max-width: 900px) {
  .app-rail {
    display: none;
  }

  .shell-topbar {
    margin-left: 0;
  }

  #app-content {
    margin-left: 0;
  }

  .mobile-app-switcher {
    display: flex;
  }

  .topbar-user-name {
    display: none;
  }
}

@media (max-width: 600px) {
  .shell-topbar {
    padding: 0.6rem 1rem;
  }

  .topbar-app-name {
    font-size: 0.95rem;
  }

  .logo {
    font-size: 2rem;
  }
}