/* ==========================================================================
   MIND VAULT — ANTI-SLOP DESIGN SYSTEM
   Zero-friction, hyper-minimalist second brain aesthetic.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,500;0,6..72,600;1,6..72,400&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  /* --- The Stark Obsidian Palette --- */
  --bg-canvas: #0D0D0D;
  --bg-surface: #141414;
  --bg-surface-elevated: #1B1B1B;
  --bg-surface-active: #222222;
  --border-subtle: #242424;
  --border-stark: #333333;
  --border-focus: #FFFFFF;

  /* --- Strict Monochrome Foregrounds --- */
  --text-primary: #F5F5F3;
  --text-secondary: #9E9E99;
  --text-muted: #5A5A56;
  --text-inverse: #0D0D0D;

  /* --- The 4 Sacred Geometric Accent Tokens --- */
  --accent-video: #EF476F;   /* ⏵ Triangle / Rose */
  --accent-read: #06D6A0;    /* ◼ Square / Teal */
  --accent-visual: #FFD166;  /* ⬤ Circle / Amber */
  --accent-thought: #118AB2; /* ⬢ Hexagon / Ocean */

  /* --- Brutalist Shadows (Zero Soft Diffusion) --- */
  --shadow-brutal-sm: 2px 2px 0px #000000;
  --shadow-brutal-md: 4px 4px 0px #000000;
  --shadow-brutal-lg: 6px 6px 0px #000000;

  /* --- Typography Stacks --- */
  --font-serif: 'Newsreader', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', SFMono-Regular, Consolas, monospace;

  /* --- Strict Motion Curves (120ms - 180ms ease-out) --- */
  --ease-sharp: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-micro: 120ms;
  --duration-default: 160ms;

  /* --- Layout Metrics --- */
  --sidebar-width: 250px;
  --topbar-height: 64px;
}

/* ==========================================================================
   CSS RESET & BASE STYLES
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html, body {
  width: 100%;
  height: 100%;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

/* Scrollbar Minimalist Brutalism */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-canvas);
}
::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: 0px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--border-stark);
}

/* ==========================================================================
   APP SHELL LAYOUT (GRID SYSTEM)
   ========================================================================== */

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
  background-color: var(--bg-canvas);
}

/* ==========================================================================
   SIDEBAR COMPONENT
   ========================================================================== */

.sidebar {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  padding: 24px 18px;
  height: 100vh;
  position: sticky;
  top: 0;
  z-index: 50;
  user-select: none;
}

.brand-section {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 32px;
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-read);
  display: inline-block;
  box-shadow: 0 0 8px var(--accent-read);
}

.brand-tagline {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.01em;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* Navigation Category Filters */
.nav-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.01em;
  padding: 0 12px 8px 12px;
}

.nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 10px 12px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-micro) var(--ease-sharp);
  text-align: left;
}

.nav-item-content {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-symbol {
  font-size: 1.05rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Category Specific Geometric Colors */
.symbol-all { color: var(--text-primary); }
.symbol-video { color: var(--accent-video); }
.symbol-read { color: var(--accent-read); }
.symbol-visual { color: var(--accent-visual); }
.symbol-thought { color: var(--accent-thought); }

.nav-counter {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.01em;
  color: var(--text-muted);
  background: var(--bg-canvas);
  padding: 2px 6px;
  border: 1px solid var(--border-subtle);
}

/* Nav Item States */
.nav-item:hover {
  background-color: var(--bg-surface-elevated);
  border-color: var(--border-stark);
  color: var(--text-primary);
  transform: translateX(2px);
}

.nav-item:focus-visible {
  outline: none;
  border-color: var(--border-focus);
  background-color: var(--bg-surface-elevated);
  box-shadow: var(--shadow-brutal-sm);
}

.nav-item:active {
  background-color: var(--bg-surface-active);
  transform: translateX(0);
}

.nav-item.is-active {
  background-color: var(--bg-surface-elevated);
  border-color: var(--border-stark);
  color: var(--text-primary);
  box-shadow: var(--shadow-brutal-sm);
}

.nav-item.is-active .nav-counter {
  border-color: var(--border-stark);
  color: var(--text-primary);
}

/* Sidebar Footer & Auth Status */
.sidebar-footer {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--border-subtle);
}

.vault-status-pill {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.01em;
  color: var(--text-muted);
}

.auth-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px;
  background-color: var(--text-primary);
  color: var(--text-inverse);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  border: 1px solid var(--text-primary);
  cursor: pointer;
  box-shadow: var(--shadow-brutal-sm);
  transition: all var(--duration-micro) var(--ease-sharp);
}

.auth-btn:hover {
  background-color: #FFFFFF;
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-brutal-md);
}

.auth-btn:focus-visible {
  outline: none;
  border-color: var(--accent-read);
  box-shadow: var(--shadow-brutal-md);
}

.auth-btn:active {
  transform: translate(1px, 1px);
  box-shadow: none;
}

.auth-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ==========================================================================
   MAIN FEED AREA
   ========================================================================== */

.main-content {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 32px 48px;
}

/* Top Control Bar */
.control-bar {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 36px;
}

.omni-search-wrapper {
  display: flex;
  align-items: center;
  width: 100%;
  position: relative;
}

.omni-search-input {
  width: 100%;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 16px 20px 16px 44px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  box-shadow: var(--shadow-brutal-sm);
  transition: all var(--duration-micro) var(--ease-sharp);
}

.omni-search-input::placeholder {
  color: var(--text-muted);
}

.omni-search-input:hover {
  border-color: var(--border-stark);
}

.omni-search-input:focus-visible {
  outline: none;
  border-color: var(--border-focus);
  background-color: var(--bg-surface-elevated);
  box-shadow: var(--shadow-brutal-md);
}

.omni-search-icon {
  position: absolute;
  left: 18px;
  color: var(--text-muted);
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

.search-shortcut-hint {
  position: absolute;
  right: 18px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.01em;
  color: var(--text-muted);
  background: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  padding: 3px 6px;
  pointer-events: none;
}

/* Fast Quick-Capture Panel */
.quick-capture-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 12px;
  box-shadow: var(--shadow-brutal-sm);
}

.quick-capture-input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  padding: 8px 12px;
}

.quick-capture-input::placeholder {
  color: var(--text-muted);
}

.quick-capture-input:focus-visible {
  outline: none;
}

.capture-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-stark);
  color: var(--text-primary);
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all var(--duration-micro) var(--ease-sharp);
}

.capture-btn:hover {
  background-color: var(--text-primary);
  color: var(--text-inverse);
  border-color: var(--text-primary);
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-brutal-sm);
}

.capture-btn:focus-visible {
  outline: none;
  border-color: var(--border-focus);
}

.capture-btn:active {
  transform: translate(1px, 1px);
  box-shadow: none;
}

.capture-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
}

/* ==========================================================================
   FEED HEADER & STATUS BAR
   ========================================================================== */

.feed-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.feed-title {
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.feed-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.01em;
  color: var(--text-muted);
}

/* ==========================================================================
   MASONRY / GRID FEED
   ========================================================================== */

.vault-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
  align-items: start;
}

/* Staggered Orchestrated Entrance Animation */
@keyframes cardEntrance {
  0% {
    opacity: 0;
    transform: translateY(14px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.vault-card {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 20px;
  box-shadow: var(--shadow-brutal-sm);
  transition: border-color var(--duration-default) var(--ease-sharp),
              transform var(--duration-default) var(--ease-sharp),
              box-shadow var(--duration-default) var(--ease-sharp);
  position: relative;
  overflow: hidden;
  animation: cardEntrance 240ms var(--ease-sharp) backwards;
}

/* Stagger delays for first few items */
.vault-card:nth-child(1) { animation-delay: 40ms; }
.vault-card:nth-child(2) { animation-delay: 80ms; }
.vault-card:nth-child(3) { animation-delay: 120ms; }
.vault-card:nth-child(4) { animation-delay: 160ms; }
.vault-card:nth-child(5) { animation-delay: 200ms; }
.vault-card:nth-child(6) { animation-delay: 240ms; }

/* Brutalist Accent Top Strip */
.vault-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--card-accent, var(--border-stark));
}

.vault-card[data-category="video"] { --card-accent: var(--accent-video); }
.vault-card[data-category="read"] { --card-accent: var(--accent-read); }
.vault-card[data-category="visual"] { --card-accent: var(--accent-visual); }
.vault-card[data-category="thought"] { --card-accent: var(--accent-thought); }

/* Card Interactive States */
.vault-card:hover {
  border-color: var(--border-stark);
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-brutal-md);
}

.vault-card:focus-visible {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: var(--shadow-brutal-md);
}

/* Card Header */
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.category-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--card-accent);
}

.category-symbol {
  font-size: 0.95rem;
  line-height: 1;
}

.card-timestamp {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.01em;
  color: var(--text-muted);
}

.card-delete-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  padding: 0 4px;
  cursor: pointer;
  opacity: 0.3;
  transition: all var(--duration-micro) var(--ease-sharp);
}

.card-delete-btn:hover {
  opacity: 1;
  color: var(--accent-video);
}

.card-delete-btn:focus-visible {
  outline: 1px solid var(--accent-video);
  opacity: 1;
}

.card-delete-btn:active {
  transform: scale(0.9);
}

/* Card Content Typography */
.card-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.card-title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-micro) var(--ease-sharp);
}

.card-title a:hover {
  color: #FFFFFF;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.card-title a:focus-visible {
  outline: 1px solid var(--border-focus);
}

.card-summary {
  font-family: var(--font-sans);
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

/* Card Tags */
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
}

.tag-pill {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.01em;
  color: var(--text-muted);
  background: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  padding: 2px 7px;
  cursor: pointer;
  transition: all var(--duration-micro) var(--ease-sharp);
}

.tag-pill:hover {
  border-color: var(--border-stark);
  color: var(--text-primary);
}

.tag-pill:focus-visible {
  outline: none;
  border-color: var(--border-focus);
}

.tag-pill:active {
  background: var(--bg-surface-active);
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
  text-align: center;
  border: 1px dashed var(--border-subtle);
  grid-column: 1 / -1;
}

.empty-symbol {
  font-size: 2rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.empty-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.empty-subtitle {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.01em;
  color: var(--text-muted);
  max-width: 380px;
}

/* ==========================================================================
   RESPONSIVENESS & MOBILE DOCK
   ========================================================================== */

@media (max-width: 860px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    height: auto;
    position: relative;
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
    padding: 18px;
  }

  .main-content {
    padding: 24px 18px 80px 18px;
  }

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