/* ============================================================================
   SIDEBAR LITE - Clean theme only, no shadow DOM
   All selectors prefixed .sb- to avoid collisions
   ============================================================================ */

/* Variables */
:root {
  --sb-width: 280px;
  --sb-width-collapsed: 60px;
  --sb-bg: rgba(255, 255, 255, 0.98);
  --sb-border: #E5E5E5;
  --sb-text: #1A1A1A;
  --sb-text-secondary: #666666;
  --sb-text-placeholder: #999999;
  --sb-error: #DC2626;
  --sb-transition: 0.3s ease;
}

/* ============================================================================
   GLOBAL: Body padding for sidebar space
   ============================================================================ */

/* Regular screens: collapsed sidebar pushes content */
@media (min-width: 769px) and (max-width: 1599px) {
  html { --sidebar-content-offset: 60px; }
  body {
    padding-left: 60px !important;
    transition: padding-left var(--sb-transition);
    box-sizing: border-box;
  }
}

/* Wide screens: expanded sidebar pushes content */
@media (min-width: 1600px) {
  html { --sidebar-content-offset: 280px; }
  body {
    padding-left: 280px !important;
    transition: padding-left var(--sb-transition);
    box-sizing: border-box;
  }
}

/* Mobile: no push */
@media (max-width: 768px) {
  html { --sidebar-content-offset: 0px !important; }
  body { padding-left: 0 !important; }
}

/* ============================================================================
   SIDEBAR SHELL
   ============================================================================ */

.sb-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sb-width);
  background: var(--sb-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--sb-border);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: width var(--sb-transition), transform var(--sb-transition);
  overflow: hidden;
}

/* Collapsed state (medium screens) */
.sb-sidebar.sb-collapsed {
  width: var(--sb-width-collapsed);
}

/* Hover-expand on medium screens */
@media (min-width: 769px) and (max-width: 1599px) {
  .sb-sidebar.sb-collapsed:hover {
    width: var(--sb-width);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.08);
  }
}

/* ============================================================================
   MOBILE
   ============================================================================ */

@media (max-width: 768px) {
  .sb-sidebar {
    top: 57px; /* Below top bar */
    left: 0;
    bottom: 0;
    width: 100vw;
    height: auto;
    transform: translateX(-100%);
    z-index: 10000;
  }

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

  /* Hide logo on mobile (top bar shows title) */
  .sb-sidebar .sb-logo {
    display: none;
  }

  .sb-backdrop {
    position: fixed;
    top: 57px; /* Below top bar */
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--sb-transition);
  }

  .sb-backdrop.sb-visible {
    opacity: 1;
    pointer-events: all;
  }
}

/* Hide backdrop on desktop */
@media (min-width: 769px) {
  .sb-backdrop {
    display: none;
  }
}

/* ============================================================================
   LOGO / BRAND
   ============================================================================ */

.sb-logo {
  padding: 24px 20px;
  border-bottom: 1px solid var(--sb-border);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80px;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--sb-text);
}

.sb-sidebar.sb-collapsed .sb-logo {
  font-size: 0;
  padding: 24px 10px;
}

@media (min-width: 769px) and (max-width: 1599px) {
  .sb-sidebar.sb-collapsed:hover .sb-logo {
    font-size: 1.125rem;
    padding: 24px 20px;
  }
}

/* ============================================================================
   PROFILE SECTION
   ============================================================================ */

.sb-profile {
  display: none; /* shown via JS when logged in */
  align-items: center;
  gap: 16px;
  padding: 20px 16px;
  border-bottom: 1px solid var(--sb-border);
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.sb-profile:hover {
  background-color: rgba(0, 0, 0, 0.03);
}

.sb-sidebar.sb-collapsed .sb-profile {
  padding: 20px 10px;
  margin-left: -16px;
}

/* Avatar ring container */
.sb-avatar-ring {
  position: relative;
  width: 72px;
  height: 72px;
  flex-shrink: 0;
}

.sb-avatar-ring svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.sb-ring-bg {
  fill: none;
  stroke: var(--sb-border);
  stroke-width: 3;
}

.sb-ring-progress {
  fill: none;
  stroke: var(--sb-text);
  stroke-width: 3;
  stroke-linecap: round;
  transition: stroke-dasharray 0.6s ease;
  filter: none;
}

/* Avatar wrapper */
.sb-avatar {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  border: 1px solid var(--sb-border);
  transition: box-shadow 0.3s ease;
}

.sb-avatar:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.sb-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.sb-avatar-fallback {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 600;
  color: white;
}

/* Profile info */
.sb-profile-info {
  overflow: hidden;
  transition: opacity var(--sb-transition);
}

.sb-profile-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--sb-text);
  white-space: nowrap;
}

.sb-sidebar.sb-collapsed .sb-profile-info {
  opacity: 0;
  height: 0;
  overflow: hidden;
}

@media (min-width: 769px) and (max-width: 1599px) {
  .sb-sidebar.sb-collapsed:hover .sb-profile-info {
    opacity: 1;
    height: auto;
  }
}

/* Streak badge */
.sb-streak {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 4px;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--sb-text);
  background: #F0F0F0;
  border: 1px solid var(--sb-border);
  border-radius: 12px;
}

/* ============================================================================
   MENU LINKS
   ============================================================================ */

.sb-links {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 0;
}

@media (max-width: 768px) {
  .sb-links {
    max-height: calc(100dvh - 57px - 80px);
    padding-bottom: 0;
  }
}

/* Scrollbar */
.sb-links::-webkit-scrollbar { width: 4px; }
.sb-links::-webkit-scrollbar-track { background: transparent; }
.sb-links::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.15);
  border-radius: 2px;
}
.sb-links::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.25);
}

/* ============================================================================
   MENU ITEM
   ============================================================================ */

.sb-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px 12px 26px;
  color: #525252;
  text-decoration: none;
  transition: transform var(--sb-transition), color var(--sb-transition), background var(--sb-transition);
  cursor: pointer;
  position: relative;
  white-space: nowrap;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
}

/* Left border indicator (desktop only) */
.sb-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: #000;
  transform: scaleY(0);
  transition: transform var(--sb-transition);
}

@media (max-width: 768px) {
  .sb-item::before { display: none !important; }
}
@media (hover: none) and (pointer: coarse) {
  .sb-item::before { display: none !important; }
}

.sb-item:hover {
  color: #000;
  background: #FAFAFA;
  transform: translateX(3px);
}

.sb-item:hover::before {
  transform: scaleY(1);
}

/* Active state */
.sb-item.sb-active {
  color: #000 !important;
  background: #F5F5F5;
}

.sb-item.sb-active .sb-label {
  font-weight: 500;
}

.sb-item.sb-active::before {
  background: #000;
  transform: scaleY(1);
}

/* Icon */
.sb-item .sb-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: inherit;
}

.sb-item .sb-icon svg {
  width: 18px;
  height: 18px;
  stroke-width: 1.5;
}

/* Icon fill/regular toggle */
.sb-item .icon-fill { display: none; }
.sb-item.sb-active .icon-regular { display: none; }
.sb-item.sb-active .icon-fill { display: inline; }

/* Label hidden when collapsed */
.sb-sidebar.sb-collapsed .sb-label {
  opacity: 0;
  width: 0;
  overflow: hidden;
}

.sb-sidebar.sb-collapsed .sb-item {
  padding-left: 21px;
  justify-content: center;
}

@media (min-width: 769px) and (max-width: 1599px) {
  .sb-sidebar.sb-collapsed:hover .sb-label {
    opacity: 1;
    width: auto;
  }
  .sb-sidebar.sb-collapsed:hover .sb-item {
    padding-left: 26px;
    justify-content: flex-start;
  }
}

/* ============================================================================
   DIVIDER
   ============================================================================ */

.sb-divider {
  height: 1px;
  background: var(--sb-border);
  margin: 12px 20px;
}

.sb-sidebar.sb-collapsed .sb-divider {
  margin: 12px 10px;
}

/* Spacer (pushes logout to bottom) */
.sb-spacer {
  flex-grow: 1;
}

/* ============================================================================
   LOGOUT LINK
   ============================================================================ */

.sb-item.sb-logout {
  border-top: 1px solid var(--sb-border);
  margin-top: auto;
}

@media (max-width: 768px) {
  .sb-item.sb-logout {
    background: var(--sb-bg) !important;
  }
}

/* ============================================================================
   LOGIN FORM
   ============================================================================ */

.sb-auth-container {
  width: 100%;
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--sb-transition);
}

.sb-auth-container.sb-auth-open {
  max-height: 700px;
  overflow: visible;
}

.sb-login-form {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  padding: 0 20px;
  border-bottom: 1px solid var(--sb-border);
  transform: translateY(-10px);
  transition: max-height var(--sb-transition), opacity var(--sb-transition), padding var(--sb-transition), transform var(--sb-transition);
}

.sb-login-form.sb-show {
  max-height: 600px;
  opacity: 1;
  padding: 16px 20px;
  transform: translateY(0);
  overflow: visible;
}

/* Hide form when collapsed */
.sb-sidebar.sb-collapsed .sb-login-form {
  max-height: 0 !important;
  opacity: 0 !important;
  padding: 0 20px !important;
  overflow: hidden !important;
}

@media (min-width: 769px) and (max-width: 1599px) {
  .sb-sidebar.sb-collapsed:hover .sb-login-form.sb-show {
    max-height: 600px !important;
    opacity: 1 !important;
    padding: 16px 20px !important;
    overflow: visible !important;
  }
}

/* Input wrapper */
.sb-input-wrap {
  margin-bottom: 16px;
  position: relative;
  width: 100%;
  box-sizing: border-box;
}

.sb-input-wrap input {
  width: 100%;
  padding: 10px 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--sb-border);
  border-radius: 0;
  color: var(--sb-text);
  font-family: 'Inter', sans-serif;
  font-size: 16px; /* prevent iOS zoom */
  font-weight: 400;
  transition: border-color var(--sb-transition);
  box-sizing: border-box;
}

.sb-input-wrap input:focus {
  outline: none;
  border-bottom-color: var(--sb-text);
}

.sb-input-wrap input::placeholder {
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  font-weight: 300;
  color: var(--sb-text-placeholder);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Forgot pill */
.sb-forgot {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 11px;
  font-weight: 500;
  color: var(--sb-text-secondary);
  background: #F0F0F0;
  padding: 4px 10px;
  border-radius: 9999px;
  cursor: pointer;
  border: 1px solid var(--sb-border);
  transition: all 0.2s ease;
}

.sb-forgot:hover {
  background: var(--sb-border);
  color: var(--sb-text);
}

/* Remember me */
.sb-remember {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 13px;
  color: var(--sb-text-secondary);
  font-weight: 300;
}

.sb-remember input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--sb-text);
}

.sb-remember label {
  cursor: pointer;
  user-select: none;
}

/* Login button */
.sb-login-btn {
  width: 100%;
  height: 44px;
  padding: 0 20px;
  margin: 20px 0 0;
  background: var(--sb-text);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  transition: background 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.sb-login-btn:hover:not(:disabled) {
  background: #333;
}

.sb-login-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.sb-login-btn.sb-loading {
  pointer-events: none;
}

.sb-login-btn .sb-spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: sb-spin 0.6s linear infinite;
}

.sb-login-btn.sb-loading .sb-spinner {
  display: inline-block;
}

.sb-login-btn.sb-loading .sb-btn-text {
  display: none;
}

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

/* Error message */
.sb-error {
  margin-top: 12px;
  padding: 10px;
  background: rgba(220, 38, 38, 0.06);
  border: 1px solid var(--sb-error);
  border-radius: 8px;
  color: var(--sb-error);
  font-size: 13px;
  font-weight: 300;
  text-align: center;
  display: none;
}

.sb-error.sb-visible {
  display: block;
}

/* Signup link */
.sb-signup {
  margin-top: 16px;
  padding-bottom: 4px;
  font-size: 13px;
  color: var(--sb-text-secondary);
  text-align: center;
}

.sb-signup a {
  color: var(--sb-text);
  text-decoration: underline;
  cursor: pointer;
}

.sb-signup a:hover {
  color: #000;
}

/* ============================================================================
   MOBILE TOP BAR (library mode)
   ============================================================================ */

.sb-top-bar {
  display: none; /* Only shown on mobile via media query */
  position: sticky;
  top: 0;
  z-index: 100;
}

@media (max-width: 768px) {
  .sb-top-bar {
    display: block;
  }
}

@media (min-width: 769px) {
  .sb-top-bar {
    display: none !important;
  }
}

.sb-top-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  position: relative;
}

.sb-top-bar-hamburger {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  -webkit-tap-highlight-color: transparent;
}

.sb-top-bar-hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: #1A1A1A;
  border-radius: 1px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.sb-top-bar-hamburger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.sb-top-bar-hamburger.is-open span:nth-child(2) {
  opacity: 0;
}
.sb-top-bar-hamburger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.sb-top-bar-brand {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 10px;
  font-weight: 600;
  color: #1A1A1A;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.2;
}

.sb-top-bar-login {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: #1A1A1A;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 0;
  -webkit-tap-highlight-color: transparent;
}

.sb-top-bar-login[hidden] {
  display: none;
}