/* ==========================================================================
   WARSTREET MEMORIES — APP STYLESHEET (STAGE 01 REFINEMENT)
   Brand: WarStreet Experience Model™
   Typography: Montserrat (Headings & Brand) | Poppins (Body & Meta)
   Palette: Neutral Base #f7f5f2 | White Cards #ffffff | Primary Text #222222
   Architecture: Mobile-first app interface, 2x2 Category Grid, Direct Routing
   ========================================================================== */

:root {
  --color-base: #f7f5f2;
  --color-surface: #ffffff;
  --color-surface-muted: #f0ece6;
  --color-surface-hover: #faf8f5;
  --color-text-primary: #222222;
  --color-text-secondary: #5f5a54;
  --color-text-tertiary: #8c867f;
  --color-border: #e6e1da;
  --color-border-subtle: #eeeae4;
  --color-border-focus: #c59b27;
  --color-accent: #9b722d;
  --color-accent-light: #f5ede0;
  --color-accent-hover: #835e21;

  --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --shadow-sm: 0 1px 3px rgba(34, 34, 34, 0.04);
  --shadow-card: 0 4px 14px rgba(34, 34, 34, 0.05);
  --shadow-active: 0 2px 6px rgba(34, 34, 34, 0.04);

  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;

  --transition-fast: 140ms ease;
  --transition-smooth: 220ms cubic-bezier(0.16, 1, 0.3, 1);
  --app-max-width: 580px;
}

/* Base Reset & Constraints */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  background-color: var(--color-base);
}

body {
  background-color: var(--color-base);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* App Shell Container */
.app-shell {
  width: 100%;
  max-width: var(--app-max-width);
  margin-left: auto;
  margin-right: auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-base);
  position: relative;
}

@media (min-width: 600px) {
  .app-shell {
    border-left: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.03);
  }
}

/* Compact App Header */
.app-header {
  height: 58px;
  padding: 0 1.25rem;
  background-color: rgba(247, 245, 242, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--color-text-primary);
}

.brand-monogram {
  width: 30px;
  height: 30px;
  background-color: var(--color-text-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.brand-titles {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.15;
  color: var(--color-text-primary);
}

.brand-subtitle {
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

.header-status-pill {
  font-family: monospace;
  font-size: 0.68rem;
  color: var(--color-text-tertiary);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-xs);
}

/* Main App Content Viewport */
.app-main {
  flex: 1 0 auto;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
}

/* App View Containers (Smooth transition between screens) */
.app-view {
  display: flex;
  flex-direction: column;
  flex: 1;
  opacity: 1;
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.app-view[hidden] {
  display: none !important;
  opacity: 0;
}

/* ==========================================================================
   HOMEPAGE VIEW: 2-COLUMN × 2-ROW CATEGORY GRID
   ========================================================================== */
.view-intro-bar {
  margin-bottom: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.view-label {
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.view-hint {
  font-size: 0.74rem;
  color: var(--color-text-tertiary);
}

/* Exactly 2-column x 2-row grid */
.category-grid-2x2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
  width: 100%;
}

/* Clickable Category Card */
.category-btn-card {
  appearance: none;
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1rem;
  min-height: 140px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  text-align: left;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
  user-select: none;
  position: relative;
  text-decoration: none;
  color: inherit;
}

.category-btn-card:hover {
  border-color: #d8d2c8;
  background-color: var(--color-surface-hover);
  box-shadow: var(--shadow-card);
}

.category-btn-card:active {
  transform: scale(0.975);
  box-shadow: var(--shadow-active);
  border-color: var(--color-border-focus);
}

.category-btn-card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Card Top: Icon & Indicator */
.card-top-row {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.category-icon-box {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background-color: var(--color-surface-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: background-color var(--transition-fast);
}

.category-btn-card:hover .category-icon-box {
  background-color: var(--color-accent-light);
}

.category-chevron {
  width: 18px;
  height: 18px;
  color: var(--color-text-tertiary);
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.category-btn-card:hover .category-chevron {
  color: var(--color-text-primary);
  transform: translateX(2px);
}

/* Card Bottom: Name & Count */
.card-bottom-col {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.category-name-text {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.2;
}

.category-meta-text {
  font-size: 0.72rem;
  color: var(--color-text-tertiary);
  font-weight: 500;
}

.category-meta-text.has-memories {
  color: var(--color-accent);
  font-weight: 600;
}

/* ==========================================================================
   CATEGORY SCREEN: SCREEN WITH BACK NAVIGATION & MEMORY LIST
   ========================================================================== */
.category-screen-header {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.nav-back-button {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 0.45rem 0.8rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  width: fit-content;
  transition: all var(--transition-fast);
  text-decoration: none;
  min-height: 38px;
}

.nav-back-button:hover {
  color: var(--color-text-primary);
  border-color: #d8d2c8;
  background-color: var(--color-surface-hover);
}

.nav-back-button:active {
  transform: scale(0.97);
}

.nav-back-button svg {
  width: 16px;
  height: 16px;
}

.category-hero-summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.category-hero-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.category-hero-text h1 {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.2;
}

.category-hero-text p {
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  line-height: 1.35;
}

/* Memory Entries Container */
.memory-list-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Individual Memory Card (Stella Aaliyah Dinar) */
.memory-item-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.15rem 1rem;
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  min-height: 76px;
}

.memory-item-card:hover {
  border-color: var(--color-accent);
  background-color: #fbf9f6;
  box-shadow: var(--shadow-card);
}

.memory-item-card:active {
  transform: scale(0.98);
}

.memory-item-card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.memory-left-info {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
}

.memory-avatar-badge {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #222222 0%, #3e3a35 100%);
  color: #f7f5f2;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  flex-shrink: 0;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.memory-text-group {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.memory-person-name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.memory-person-role {
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  line-height: 1.3;
}

.memory-path-pill {
  font-family: monospace;
  font-size: 0.68rem;
  color: var(--color-text-tertiary);
  margin-top: 0.2rem;
}

.memory-action-arrow {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.memory-item-card:hover .memory-action-arrow {
  transform: translateX(3px);
}

/* Minimal Intentional Empty State */
.empty-category-card {
  background-color: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.75rem 1.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.empty-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-surface-muted);
  color: var(--color-text-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.empty-state-headline {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 0.35rem;
}

.empty-state-caption {
  font-size: 0.8rem;
  color: var(--color-text-tertiary);
  max-width: 280px;
  line-height: 1.45;
}

/* Compact App Footer */
.app-footer {
  margin-top: auto;
  padding: 1.25rem 1.25rem 1.5rem;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.footer-model-signature {
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: 0.02em;
}

.footer-model-signature span {
  color: var(--color-accent);
}

.footer-domain-note {
  font-family: monospace;
  font-size: 0.68rem;
  color: var(--color-text-tertiary);
}

/* Accessibility & Reduced Motion */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}