/**
 * ScholarVault by AppsToUse — Layout CSS
 * Responsive sidebar shell, ambient background mesh orbs, top search bar, and main views.
 */

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-app);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-slow), color var(--transition-slow);
  position: relative;
}

/* Ambient Glowing Background Mesh Orbs */
.ambient-glow-container {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.ambient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.85;
  mix-blend-mode: screen;
  transition: background-color 1s ease;
}

.ambient-orb.orb-1 {
  width: 550px;
  height: 550px;
  top: -100px;
  right: 15%;
  background: var(--orb-1);
  animation: float-slow 18s ease-in-out infinite alternate;
}

.ambient-orb.orb-2 {
  width: 480px;
  height: 480px;
  bottom: 5%;
  left: 20%;
  background: var(--orb-2);
  animation: float-reverse 22s ease-in-out infinite alternate;
}

.ambient-orb.orb-3 {
  width: 400px;
  height: 400px;
  top: 40%;
  right: -80px;
  background: var(--orb-3);
  animation: float-pulse 14s ease-in-out infinite alternate;
}

@keyframes float-slow {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, 30px) scale(1.08); }
  100% { transform: translate(-20px, 50px) scale(0.95); }
}

@keyframes float-reverse {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, -40px) scale(1.1); }
  100% { transform: translate(30px, -20px) scale(0.98); }
}

@keyframes float-pulse {
  0% { transform: scale(0.9) translate(0, 0); opacity: 0.6; }
  50% { transform: scale(1.15) translate(-20px, 20px); opacity: 0.9; }
  100% { transform: scale(1) translate(10px, -10px); opacity: 0.7; }
}

/* Main Application Container */
#app-container {
  display: flex;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  position: relative;
  z-index: 1;
}

/* =========================================================================
   Sidebar Navigation
   ========================================================================= */
#app-sidebar {
  width: 260px;
  min-width: 260px;
  height: 100%;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.25rem 1rem;
  z-index: 20;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition: transform var(--transition-normal), width var(--transition-normal);
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.25rem 0.5rem 1.25rem 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--accent-primary-gradient);
  display: grid;
  place-items: center;
  color: white;
  box-shadow: 0 0 20px var(--glow-primary);
  transition: transform var(--transition-normal);
}

.brand-wrapper:hover .brand-icon {
  transform: rotate(-5deg) scale(1.05);
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.72rem;
  color: var(--accent-secondary);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Sidebar Nav Items */
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: 1.25rem;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  width: 100%;
  text-align: left;
  transition: all var(--transition-fast);
}

.nav-item:hover {
  color: var(--text-main);
  background: var(--bg-surface);
  transform: translateX(3px);
}

.nav-item.active {
  color: var(--text-main);
  background: var(--bg-surface-active);
  border-color: var(--border-glass);
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.nav-icon {
  font-size: 1.15rem;
  width: 22px;
  text-align: center;
}

.nav-badge {
  margin-left: auto;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-full);
  background: var(--badge-bg);
  color: var(--badge-text);
  font-weight: 600;
}

/* Sidebar Footer (Streak, Stats, Settings) */
.sidebar-footer {
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.streak-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  backdrop-filter: blur(12px);
}

.streak-flame {
  font-size: 1.4rem;
  animation: pulse-flame 2s infinite ease-in-out;
}

.streak-val {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
}

.streak-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
}

@keyframes pulse-flame {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.18); filter: drop-shadow(0 0 8px rgba(245, 158, 11, 0.7)); }
}

/* =========================================================================
   Main Viewport
   ========================================================================= */
#main-content {
  flex: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: transparent;
}

/* Top App Bar */
.top-bar {
  height: 68px;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0 1.75rem;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-app);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 10;
}

.search-box-wrapper {
  flex: 1;
  max-width: 460px;
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 1rem;
  color: var(--text-subtle);
  font-size: 1rem;
  pointer-events: none;
}

.global-search-input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 0.6rem 3.4rem 0.6rem 2.6rem;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  outline: none;
  transition: all var(--transition-fast);
}

.global-search-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 16px var(--glow-primary);
  background: var(--bg-surface-active);
}

.search-shortcut-badge {
  position: absolute;
  right: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: var(--border-subtle);
  color: var(--text-subtle);
  pointer-events: none;
}

.top-bar-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

/* View Content Scrollport */
.view-container {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 1.75rem;
  scroll-behavior: smooth;
}

.view-container::-webkit-scrollbar {
  width: 6px;
}
.view-container::-webkit-scrollbar-thumb {
  background: var(--border-glass);
  border-radius: 6px;
}

.tab-view {
  display: none;
  animation: fade-in 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.tab-view.active {
  display: block;
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive Mobile Layout */
@media (max-width: 900px) {
  #app-sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    transform: translateX(-100%);
    box-shadow: 10px 0 35px rgba(0, 0, 0, 0.6);
  }

  #app-sidebar.open {
    transform: translateX(0);
  }

  .top-bar {
    padding: 0 1rem;
  }

  .view-container {
    padding: 1rem;
  }
}