/**
 * Tools Hub Styles
 * Unified styling for the Tools Hub application
 * Mobile-first, accessible, premium design
 */

/* ============================================
   ROOT VARIABLES & THEME
   ============================================ */

:root {
  /* Colors */
  --hub-bg: #ffffff;
  --hub-fg: #0f1110;
  --hub-border: #e5e7eb;
  --hub-accent: #10b981;
  --hub-accent-hover: #059669;
  --hub-muted: #5f6878;
  --hub-error: #ef4444;
  --hub-warning: #f59e0b;
  --hub-info: #3b82f6;

  /* Spacing */
  --hub-nav-rail-width: 260px;
  --hub-summary-width: 320px;
  --hub-header-height: 64px;
  --hub-mobile-nav-height: 72px;

  /* Typography */
  --hub-font-sans: 'Inter', -apple-system, blinkmacsystemfont, 'Segoe UI', sans-serif;
  --hub-font-mono: 'SF Mono', monaco, 'Cascadia Code', monospace;

  /* Shadows */
  --hub-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 5%);
  --hub-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 10%);
  --hub-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 10%);
  --hub-shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 10%);

  /* Border Radius */
  --hub-radius-sm: 0.375rem;
  --hub-radius-md: 0.5rem;
  --hub-radius-lg: 0.75rem;
  --hub-radius-xl: 1rem;

  /* Transitions */
  --hub-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --hub-transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --hub-transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-Index Layers */
  --z-backdrop: 1000;
  --z-nav-sheet: 1001;
  --z-header: 100;
  --z-modal: 2000;
}

/* Dark Mode (Future Enhancement) */
@media (prefers-color-scheme: dark) {
  :root {
    --hub-bg: #0f1110;
    --hub-fg: #f9fafb;
    --hub-border: #374151;
    --hub-muted: #9ca3af;
  }
}

/* ============================================
   BASE & LAYOUT
   ============================================ */

.tools-hub-page {
  margin: 0;
  padding: 0;
  font-family: var(--hub-font-sans);
  color: var(--hub-fg);
  background: var(--hub-bg);
  overflow-x: hidden;
}

.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ============================================
   HEADER
   ============================================ */

.app-header {
  height: var(--hub-header-height);
  background: var(--hub-bg);
  border-bottom: 1px solid var(--hub-border);
  position: sticky;
  top: 0;
  z-index: var(--z-header);
}

.app-header__content {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
  max-width: 100%;
}

.app-header__left,
.app-header__right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.app-header__center {
  flex: 1;
  display: flex;
  justify-content: center;
  padding: 0 1rem;
}

.app-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--hub-fg);
  font-weight: 600;
  font-size: 1.125rem;
  transition: opacity var(--hub-transition-fast);
}

.app-logo:hover {
  opacity: 70%;
}

.app-logo img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: var(--hub-radius-md);
}

.app-logo__text {
  display: none;
}

.app-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--hub-fg);
  text-align: center;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hamburger-icon {
  width: 24px;
  height: 18px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hamburger-icon span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--hub-fg);
  border-radius: 2px;
  transition: all var(--hub-transition-fast);
}

/* ============================================
   MAIN LAYOUT (3-Column)
   ============================================ */

.app-layout {
  display: grid;
  grid-template-columns: 1fr;
  flex: 1;
  overflow: hidden;
}

/* Desktop 3-column layout */
@media (min-width: 1024px) {
  .app-layout {
    grid-template-columns: var(--hub-nav-rail-width) 1fr var(--hub-summary-width);
  }
}

/* ============================================
   NAVIGATION RAIL (Desktop Left Sidebar)
   ============================================ */

.nav-rail {
  display: none;
  background: #f9fafb;
  border-right: 1px solid var(--hub-border);
  overflow-y: auto;
  height: calc(100vh - var(--hub-header-height));
}

.nav-rail__inner {
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.nav-rail__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.nav-rail__project-name {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--hub-fg);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.nav-rail__edit-name {
  width: 32px;
  height: 32px;
  background: none;
  border: 1px solid var(--hub-border);
  border-radius: var(--hub-radius-md);
  color: var(--hub-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--hub-transition-fast);
  flex-shrink: 0;
}

.nav-rail__edit-name:hover {
  background: var(--hub-bg);
  color: var(--hub-accent);
  border-color: var(--hub-accent);
}

.nav-rail__section {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-rail__section-title {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--hub-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0 0.5rem;
}

.nav-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-rail__link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  border-radius: var(--hub-radius-md);
  text-decoration: none;
  color: var(--hub-fg);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--hub-transition-fast);
}

.nav-rail__link:hover {
  background: rgb(16 185 129 / 10%);
  color: var(--hub-accent);
}

.nav-rail__link--active {
  background: #047857;
  color: white;
}

.nav-rail__link--active:hover {
  background: #006c47;
}

.nav-rail__link--primary {
  background: #047857;
  color: white;
}

.nav-rail__link--primary:hover {
  background: #006c47;
}

.nav-rail__icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.nav-rail__text {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-rail__divider {
  margin: 0.5rem 0;
  border: none;
  border-top: 1px solid var(--hub-border);
}

/* Mini Summary (in nav rail) */
.nav-rail__mini-summary {
  margin-top: auto;
  padding: 1rem;
  background: var(--hub-bg);
  border: 1px solid var(--hub-border);
  border-radius: var(--hub-radius-lg);
}

.mini-summary__stat {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mini-summary__label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--hub-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.mini-summary__progress {
  height: 6px;
  background: #e5e7eb;
  border-radius: 3px;
  overflow: hidden;
}

.mini-summary__progress-bar {
  height: 100%;
  background: var(--hub-accent);
  transition: width var(--hub-transition-slow);
}

.mini-summary__value {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--hub-fg);
}

@media (min-width: 1024px) {
  .nav-rail {
    display: block;
  }
}

/* ============================================
   CONTENT AREA (Center)
   ============================================ */

.app-content {
  overflow-y: auto;
  height: calc(100vh - var(--hub-header-height));
  padding: 1.5rem;
  background: var(--hub-bg);
}

.empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  color: var(--hub-muted);
  font-size: 0.875rem;
}

/* Loading state */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  gap: 1rem;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgb(16 185 129 / 20%);
  border-top-color: var(--hub-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ============================================
   PROJECT SUMMARY (Desktop Right Sidebar)
   ============================================ */

.project-summary {
  display: none;
  background: #f9fafb;
  border-left: 1px solid var(--hub-border);
  overflow-y: auto;
  height: calc(100vh - var(--hub-header-height));
}

.project-summary__inner {
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.project-summary__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.project-summary__title {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--hub-fg);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.project-summary__edit {
  width: 32px;
  height: 32px;
  background: none;
  border: 1px solid var(--hub-border);
  border-radius: var(--hub-radius-md);
  color: var(--hub-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--hub-transition-fast);
  flex-shrink: 0;
}

.project-summary__edit:hover {
  background: var(--hub-bg);
  color: var(--hub-accent);
  border-color: var(--hub-accent);
}

/* Stats Grid */
.project-summary__stats {
  display: grid;
  gap: 1rem;
}

.summary-stat {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem;
  background: var(--hub-bg);
  border: 1px solid var(--hub-border);
  border-radius: var(--hub-radius-lg);
}

.summary-stat__icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.summary-stat__content {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
}

.summary-stat__label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--hub-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.summary-stat__value {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--hub-fg);
}

/* Progress Section */
.project-summary__progress {
  padding: 1rem;
  background: var(--hub-bg);
  border: 1px solid var(--hub-border);
  border-radius: var(--hub-radius-lg);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.progress-header__label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--hub-muted);
}

.progress-header__value {
  font-size: 1rem;
  font-weight: 600;
  color: #047857;
}

.progress-bar {
  height: 8px;
  background: #e5e7eb;
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--hub-accent), var(--hub-accent-hover));
  transition: width var(--hub-transition-slow);
}

.progress-hint {
  margin: 0;
  font-size: 0.75rem;
  color: var(--hub-muted);
  font-style: italic;
}

/* Materials List (Collapsible) */
.project-summary__materials {
  background: var(--hub-bg);
  border: 1px solid var(--hub-border);
  border-radius: var(--hub-radius-lg);
  overflow: hidden;
}

.materials-summary__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  cursor: pointer;
  user-select: none;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--hub-fg);
}

.materials-summary__header:hover {
  background: #f9fafb;
}

.materials-summary__arrow {
  transition: transform var(--hub-transition-fast);
}

.project-summary__materials[open] .materials-summary__arrow {
  transform: rotate(180deg);
}

.materials-summary__content {
  padding: 0 1rem 1rem;
}

.materials-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.materials-list__item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  background: #f9fafb;
  border-radius: var(--hub-radius-md);
  font-size: 0.875rem;
}

.materials-list__icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.materials-list__name {
  flex: 1;
  font-weight: 500;
  color: var(--hub-fg);
}

.materials-list__quantity {
  font-weight: 600;
  color: var(--hub-accent);
}

.materials-list__empty {
  padding: 1rem;
  text-align: center;
  color: var(--hub-muted);
  font-size: 0.875rem;
  font-style: italic;
}

/* Action Buttons */
.project-summary__actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.btn-block {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border: none;
  border-radius: var(--hub-radius-lg);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--hub-transition-fast);
}

.btn-primary {
  background: var(--hub-accent);
  color: white;
}

.btn-primary:hover {
  background: var(--hub-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--hub-shadow-md);
}

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

.btn-secondary:hover {
  background: #f9fafb;
  border-color: var(--hub-accent);
  color: var(--hub-accent);
}

.btn-outline {
  background: none;
  color: var(--hub-muted);
  border: 1px solid var(--hub-border);
}

.btn-outline:hover {
  background: #f9fafb;
  color: var(--hub-fg);
}

/* Credentials Badge */
.project-summary__badge {
  margin-top: auto;
  padding: 1rem;
  background: rgb(16 185 129 / 10%);
  border: 1px solid rgb(16 185 129 / 20%);
  border-radius: var(--hub-radius-lg);
}

.credentials-badge {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.credentials-badge__icon {
  width: 24px;
  height: 24px;
  background: var(--hub-accent);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.credentials-badge__content {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.credentials-badge__label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--hub-fg);
}

.credentials-badge__value {
  font-size: 0.75rem;
  color: var(--hub-muted);
  font-family: var(--hub-font-mono);
}

@media (min-width: 1024px) {
  .project-summary {
    display: block;
  }
}

/* ============================================
   MOBILE NAVIGATION (Bottom Sheet)
   ============================================ */

.nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgb(0 0 0 / 50%);
  opacity: 0%;
  visibility: hidden;
  transition: all var(--hub-transition-base);
  z-index: var(--z-backdrop);
  backdrop-filter: blur(4px);
}

.nav-backdrop.active {
  opacity: 100%;
  visibility: visible;
}

.nav-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-height: 85vh;
  background: var(--hub-bg);
  border-top-left-radius: var(--hub-radius-xl);
  border-top-right-radius: var(--hub-radius-xl);
  box-shadow: var(--hub-shadow-xl);
  transform: translateY(100%);
  transition: transform var(--hub-transition-base);
  z-index: var(--z-nav-sheet);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.nav-sheet.active {
  transform: translateY(0);
}

.nav-sheet__handle {
  padding: 0.75rem;
  display: flex;
  justify-content: center;
  cursor: grab;
}

.nav-sheet__handle:active {
  cursor: grabbing;
}

.nav-sheet__handle-bar {
  width: 40px;
  height: 4px;
  background: var(--hub-border);
  border-radius: 2px;
}

.nav-sheet__content {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.nav-sheet__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--hub-border);
}

.nav-sheet__title {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--hub-fg);
}

.nav-sheet__close {
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--hub-border);
  border-radius: var(--hub-radius-md);
  color: var(--hub-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--hub-transition-fast);
}

.nav-sheet__close:hover {
  background: #f9fafb;
  color: var(--hub-fg);
}

.nav-sheet__nav {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.nav-sheet__section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.nav-sheet__section-title {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--hub-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-sheet__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.nav-sheet__card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1.25rem 1rem;
  background: #f9fafb;
  border: 1px solid var(--hub-border);
  border-radius: var(--hub-radius-lg);
  text-decoration: none;
  color: var(--hub-fg);
  font-size: 0.875rem;
  font-weight: 500;
  text-align: center;
  transition: all var(--hub-transition-fast);
  min-height: 96px;
}

.nav-sheet__card:active {
  transform: scale(0.98);
}

.nav-sheet__card:hover {
  background: rgb(16 185 129 / 10%);
  border-color: var(--hub-accent);
  color: var(--hub-accent);
}

.nav-sheet__card--active {
  background: var(--hub-accent);
  color: white;
  border-color: var(--hub-accent);
}

.nav-sheet__card--primary {
  background: var(--hub-accent);
  color: white;
  border-color: var(--hub-accent);
}

.nav-sheet__card--primary:hover {
  background: var(--hub-accent-hover);
}

.nav-sheet__icon {
  font-size: 2rem;
}

.nav-sheet__text {
  line-height: 1.3;
}

@media (min-width: 640px) {
  .nav-sheet__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .nav-backdrop,
  .nav-sheet,
  .mobile-nav-toggle {
    display: none;
  }
}

/* ============================================
   RESPONSIVE & ACCESSIBILITY
   ============================================ */

/* Tablet */
@media (min-width: 768px) {
  .app-logo__text {
    display: inline;
  }

  .app-title {
    font-size: 1.125rem;
  }
}

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

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .nav-rail__link,
  .nav-sheet__card {
    border-width: 2px;
  }
}

/* Focus Visible (Keyboard Navigation) */
:focus-visible {
  outline: 2px solid var(--hub-accent);
  outline-offset: 2px;
}

/* Touch Target Minimum (48px) */
button,
a {
  min-height: 44px;
  min-width: 44px;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border-width: 0;
}

.hidden {
  display: none !important;
}

/* Admin-gated nav items: hidden until authenticated */
[data-requires-auth] {
  display: none;
}
.admin-authed [data-requires-auth] {
  display: revert;
}