:root{
  --bg:#1c1c1c;
  --panel:#2c2c2c;
  --muted:#9a9a9a;
  --text:#ffffff;
  --accent:#198f51;
  --bubble:#2c2c2c;
  --bubble-self:#065b32;
  --radius:14px;
  /* Macro colors from Figma */
  --color-calories:#198f51;
  --color-protein:#198f51;
  --color-carbs:#4df7ab;
  --color-fat:#ff6b00;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font:16px/1.4 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,"Helvetica Neue",Arial,sans-serif;
  color:var(--text);
  background:linear-gradient(180deg,#1c1c1c, #242424 40%);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

.app{
  width:100%;
  max-width:100%;
  height:100dvh;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:0;
}

.app__body{
  display:flex;
  gap:0;
  align-items:stretch;
  flex:1;
  min-height:0;
}

.sidebar{
  position:relative;
  flex:0 0 320px;
  width:320px;
  display:flex;
  flex-direction:column;
  gap:16px;
  padding:20px;
  padding-top:20px;
  background:var(--bg);
  border-right:1px solid #2a2a2a;
  overflow-y:auto;
  transition:transform 0.3s ease, margin-left 0.3s ease;
}
body.sidebar-loading .sidebar{
  transition:none !important;
}
body.sidebar-hidden .sidebar{
  transform:translateX(-100%);
  margin-left:-320px;
}

.main{
  flex:1;
  display:flex;
  flex-direction:column;
  gap:12px;
  min-width:0;
  padding:16px;
}

.app__header{
  display:flex;
  align-items:center;
  justify-content:flex-start;
  gap:16px;
  padding:12px 16px;
  background:var(--panel);
  border-bottom:1px solid #2a2a2a;
}

.chat{
  background:var(--panel);
  border:1px solid #2a2a2a;
  border-radius:var(--radius);
  overflow:hidden;
  display:flex;
  flex:1;
}

.chat__messages{
  list-style:none;
  margin:0;
  padding:16px;
  width:100%;
  overflow:auto;
  display:flex;
  flex-direction:column;
  gap:10px;
  scroll-behavior:smooth;
}

.message{
  max-width:min(78%, 640px);
  padding:10px 12px;
  border-radius:12px;
  background:var(--bubble);
  border:1px solid #333;
  white-space:pre-wrap;
  word-wrap:break-word;
  animation:slideIn 0.3s ease-out forwards;
}

@keyframes slideIn{
  from{
    opacity:0;
    transform:translateY(10px);
  }
  to{
    opacity:1;
    transform:translateY(0);
  }
}
.message strong{
  font-weight:700;
  color:var(--text);
}
.message--self{
  margin-left:auto;
  background:linear-gradient(135deg, #0a3d24 0%, #065b32 100%);
  border:1px solid rgba(6, 91, 50, 0.4);
  animation:slideInRight 0.3s ease-out forwards;
}

@keyframes slideInRight{
  from{
    opacity:0;
    transform:translateX(20px);
  }
  to{
    opacity:1;
    transform:translateX(0);
  }
}
.message__meta{
  margin-top:6px;
  font-size:12px;
  color:var(--muted);
  display:flex;
  gap:8px;
}

.composer{
  display:flex;
  gap:10px;
  align-items:end;
  background:var(--panel);
  border:1px solid #2a2a2a;
  border-radius:var(--radius);
  padding:10px;
}
.composer__input{
  flex:1;
  resize:none;
  min-height:40px;
  max-height:160px;
  padding:10px 12px;
  border-radius:10px;
  border:1px solid #333;
  background:#0f0f0f;
  color:var(--text);
  outline:none;
}
.composer__input:focus{border-color:var(--accent)}

.btn{
  border:none;
  background:linear-gradient(135deg, #198f51 0%, #127a42 100%);
  color:#ffffff;
  padding:10px 14px;
  border-radius:10px;
  font-weight:700;
  cursor:pointer;
  box-shadow:0 2px 8px rgba(25, 143, 81, 0.3);
  transition:all 0.2s ease;
}
.btn:hover{filter:brightness(1.05)}
.btn:active{transform:translateY(1px)}
.btn--ghost{
  background:transparent;
  color:var(--muted);
  border:1px solid #333;
  box-shadow:none;
}

.app__footer{
  color:var(--muted);
  text-align:center;
  font-size:12px;
}

.macro-section{
  background:var(--panel);
  border:1px solid #2a2a2a;
  border-radius:var(--radius);
  padding:16px;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.macro-section__title{
  font-size:13px;
  color:var(--text);
  text-transform:uppercase;
  letter-spacing:1px;
  margin:0 0 8px 0;
  font-weight:700;
}
.macro-row{
  display:flex;
  flex-direction:column;
  gap:4px;
}
.macro-row__header{
  display:flex;
  justify-content:space-between;
  font-size:13px;
}
.macro-row__label{
  color:var(--text);
  font-weight:500;
}
.macro-row__value{
  color:var(--muted);
  font-size:12px;
}
.macro-bar{
  height:8px;
  background:#2a2a2a;
  border-radius:4px;
  overflow:hidden;
}
.macro-fill{
  height:100%;
  width:0;
  background:var(--accent);
  transition:width 0.3s ease;
}
.macro-fill--calories{
  background:var(--color-calories);
}
.macro-fill--protein{
  background:var(--color-protein);
}
.macro-fill--carbs{
  background:var(--color-carbs);
}
.macro-fill--fat{
  background:var(--color-fat);
}

.daily-goals{
  margin-top:8px;
  border-top:1px solid #333;
  padding-top:8px;
  display:flex;
  flex-direction:column;
  gap:4px;
}
.daily-goals__title{
  font-size:12px;
  color:var(--muted);
  text-transform:uppercase;
  letter-spacing:0.5px;
}
.daily-goals__row{
  display:flex;
  justify-content:space-between;
  font-size:12px;
  color:var(--muted);
}
.daily-goals__label{
  opacity:0.9;
}
.daily-goals__value{
  font-weight:500;
  color:var(--text);
}

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

/* ===========================
   MOBILE RESPONSIVE LAYOUT
=========================== */

/* Hide hamburger menu when onboarding is active */
body.onboarding-active .mobile-menu-btn {
  display: none !important;
}

/* Ensure onboarding appears above everything on iOS */
body.is-ios .onboarding-overlay {
  z-index: 2147483647 !important; /* Max z-index, same as iOS sidebar */
}

/* Hide sidebar when onboarding is active on iOS */
body.is-ios.onboarding-active .sidebar {
  display: none !important;
}

/* Ensure onboarding is scrollable and clickable on iOS */
body.is-ios .onboarding-overlay {
  overflow-y: auto !important;
  -webkit-overflow-scrolling: touch !important;
  pointer-events: auto !important;
}

body.is-ios .onboarding-container {
  overflow-y: auto !important;
  -webkit-overflow-scrolling: touch !important;
  pointer-events: auto !important;
}

/* Ensure onboarding buttons and cards are clickable on iOS */
body.is-ios .onboarding-overlay .btn,
body.is-ios .onboarding-preset {
  position: relative !important;
  z-index: auto !important;
  pointer-events: auto !important;
  -webkit-tap-highlight-color: rgba(0,0,0,0.1) !important;
  touch-action: manipulation !important;
  cursor: pointer !important;
}

/* Remove body scroll lock on iOS when onboarding active */
body.is-ios.onboarding-active {
  overflow: auto !important;
  position: static !important;
  width: auto !important;
  height: auto !important;
}

@media (max-width: 768px) {
  /* Mobile sidebar - NUCLEAR SIMPLE VERSION */
  .sidebar {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    flex: none !important;
    z-index: 999999 !important;
    background: #1c1c1c !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    transform: translateX(-100%) !important;
    transition: transform 0.3s ease !important;
    margin: 0 !important;
    border: none !important;
  }

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

  /* Make all children visible */
  .sidebar--open > * {
    visibility: visible !important;
    opacity: 1 !important;
    display: block !important;
  }

  .sidebar--open .mobile-sidebar-header {
    display: flex !important;
  }

  /* Mobile Sidebar Header - matches hamburger button position exactly */
  .mobile-sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 76px; /* 16px top (match hamburger) + 44px button + 16px bottom */
    min-height: 76px;
    max-height: 76px;
    padding: 16px; /* Match hamburger button top offset */
    background: var(--panel);
    border-bottom: 1px solid #2a2a2a;
    flex-shrink: 0;
  }

  .mobile-sidebar-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    height: 44px; /* Match button height */
  }

  .mobile-sidebar-logo__icon {
    font-size: 20px;
    line-height: 1;
  }

  .mobile-sidebar-logo__text {
    font-size: 18px;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.5px;
  }

  .mobile-sidebar-close {
    background: var(--panel);
    border: 1px solid #2a2a2a;
    color: var(--text);
    font-size: 24px;
    font-weight: 300;
    width: 44px; /* Match hamburger button */
    height: 44px; /* Match hamburger button */
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.2s ease;
    line-height: 1;
  }

  .mobile-sidebar-close:active {
    background: #2a2a2a;
    transform: scale(0.95);
  }

  /* Chat takes full width */
  .chat-container {
    width: 100% !important;
    flex: 1;
  }

  /* Settings modal full screen on mobile */
  .settings-modal {
    width: 100% !important;
    max-width: 100% !important;
    height: 100% !important;
    max-height: 100% !important;
    border-radius: 0 !important;
    margin: 0 !important;
  }

  /* Fix textarea height on mobile */
  .chat__form textarea {
    min-height: 44px !important;
    max-height: 120px !important;
    font-size: 16px !important; /* Prevents zoom on iOS */
  }

  /* Sticky input at bottom with safe area */
  .chat__form {
    padding-bottom: env(safe-area-inset-bottom, 16px);
    background: var(--bg);
  }

  /* Better modal backdrop */
  .modal {
    padding: 0;
  }

  /* Prevent body scroll when modal open */
  body.modal-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
  }

  /* Add mobile hamburger menu button */
  .mobile-menu-btn {
    display: flex !important;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 2147483646; /* Just below sidebar so it doesn't overlap */
    width: 44px;
    height: 44px;
    background: var(--panel);
    border: 1px solid #2a2a2a;
    border-radius: 8px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    color: var(--text);
    pointer-events: auto !important;
    transition: opacity 0.3s ease, visibility 0.3s ease;
  }

  /* Hide hamburger when sidebar is open */
  .mobile-menu-btn--hidden {
    display: none !important;
  }

  /* Hide hamburger when settings modal is open */
  .settings-modal[style*="display: flex"] ~ .mobile-menu-btn,
  .settings-modal[style*="display:flex"] ~ .mobile-menu-btn {
    display: none !important;
  }

  /* Mobile backdrop for sidebar */
  .mobile-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 10000 !important;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: all;
  }

  .mobile-backdrop--visible {
    display: block !important;
    opacity: 1 !important;
  }

  /* ANDROID CHROME: Base bottom padding (JS adjusts dynamically for keyboard) */
  .chat__messages {
    padding: 60px 16px 70px 16px; /* 70px = composer height */
  }

  /* Keep sidebar footer visible in the sidebar on mobile */
  .sidebar-footer {
    display: flex !important;
  }

  /* Hide app footer on mobile - composer is fixed at bottom */
  .app__footer {
    display: none !important;
  }

  /* Mobile composer - clean bottom bar with just input and send */
  .composer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 0;
    border-radius: 0;
    border-left: none;
    border-right: none;
    border-bottom: none;
    padding: 12px 16px;
    gap: 12px;
    z-index: 100;
    background: var(--panel);
  }

  .composer__input {
    flex: 1;
    min-height: 44px;
    max-height: 120px;
    padding: 12px 14px;
  }

  .composer .btn {
    min-height: 44px;
    padding: 0 20px;
    flex-shrink: 0;
  }

  /* Make buttons more touch-friendly */
  button {
    min-height: 44px;
  }


  /* iOS backdrop - hide it completely since sidebar is fullscreen */
  body.is-ios .mobile-backdrop--visible {
    display: none !important;
  }

  /* Hide main chat container when sidebar is open on iOS */
  body.is-ios.modal-open .main {
    display: none !important;
    visibility: hidden !important;
  }

  /* Hide hamburger menu when sidebar open on iOS */
  body.is-ios.modal-open .mobile-menu-btn {
    display: none !important;
  }

  /* Prevent body scroll when iOS sidebar is open (but NOT during onboarding) */
  body.is-ios.modal-open:not(.onboarding-active) {
    overflow: hidden !important;
    position: fixed !important;
    width: 100% !important;
    height: 100vh !important;
  }
}

/* Desktop: hide mobile menu and sidebar header */
@media (min-width: 769px) {
  .mobile-menu-btn,
  .mobile-backdrop,
  .mobile-sidebar-header {
    display: none !important;
  }
}

/* ===========================
   iOS SPECIFIC FIXES
=========================== */

/* Prevent iOS overscroll bounce - iOS ONLY */
@supports (-webkit-touch-callout: none) {
  body.is-ios html {
    position: fixed;
    overflow: hidden;
    width: 100%;
    height: 100%;
  }

  body.is-ios {
    position: fixed;
    overflow: hidden;
    width: 100%;
    height: 100%;
    -webkit-overflow-scrolling: touch;
  }

  body.is-ios .app {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    width: 100%;
    height: 100%;
  }

  /* Only allow scrolling in chat messages - iOS ONLY */
  body.is-ios .chat__messages {
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
  }


  /* iOS: Fix backdrop rendering */
  body.is-ios .mobile-backdrop {
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
  }

  /* iOS safe area support */
  :root {
    --safe-area-top: env(safe-area-inset-top);
    --safe-area-bottom: env(safe-area-inset-bottom);
  }

  .mobile-menu-btn {
    top: calc(16px + env(safe-area-inset-top));
  }

  .chat__form {
    padding-bottom: calc(16px + env(safe-area-inset-bottom));
  }

  .chat__messages {
    padding-top: calc(60px + env(safe-area-inset-top));
    height: calc(100vh - env(safe-area-inset-bottom));
  }
}

/* Mobile settings modal - ensure it's on top ONLY when active */
@media (max-width: 768px) {
  /* Modal is hidden by default */
  .settings-modal,
  .modal {
    display: none;
  }

  /* Only show when display is set to flex via JS */
  .settings-modal[style*="display: flex"],
  .settings-modal[style*="display:flex"],
  .modal[style*="display: flex"],
  .modal[style*="display:flex"] {
    display: flex !important;
    z-index: 10000 !important;
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    max-width: 100vw !important;
    max-height: 100vh !important;
    border-radius: 0 !important;
    margin: 0 !important;
    visibility: visible !important;
    opacity: 1 !important;
    align-items: stretch !important;
    padding: 0 !important;
  }

  /* Ensure modal content is visible when modal is shown */
  .settings-modal[style*="display: flex"] .modal__content,
  .modal[style*="display: flex"] .modal__content {
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
    width: 100% !important;
    height: 100% !important;
    max-height: 100vh !important;
    overflow-y: auto !important;
    overflow-x: hidden !important;
    -webkit-overflow-scrolling: touch !important;
    background: var(--bg) !important;
    box-sizing: border-box !important;
    padding: 16px !important;
  }

  /* Ensure all settings content fits within screen width */
  .settings-modal input,
  .settings-modal select,
  .settings-modal .form-group {
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  /* Android Chrome address bar handling */
  .chat__messages {
    /* Use dvh (dynamic viewport height) if supported, fallback to vh */
    height: calc(100dvh - 200px);
    height: calc(var(--vh, 1vh) * 100 - 200px);
  }
}

/* Brave/Chrome Android specific */
@supports (-webkit-appearance: none) {
  .chat__form {
    position: sticky;
    bottom: 0;
  }
}

/* Ensure settings button is always clickable on mobile */
@media (max-width: 768px) {
  #settingsBtn {
    z-index: 9999 !important;
    pointer-events: auto !important;
    -webkit-tap-highlight-color: transparent !important;
    touch-action: manipulation !important;
  }
}

/* Activity list for multiple workouts */
.activity-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 6px;
}

.activity-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 6px 10px;
}

.activity-item__name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 2px;
}

.activity-item__stats {
  font-size: 12px;
  color: var(--muted);
}

/* ===========================
   iOS MODERN VIEWPORT FIX
   Uses dvh units and proper keyboard handling
   Only applies to iOS (body.is-ios class added via JS)
=========================== */
@supports (-webkit-touch-callout: none) {
  @media (max-width: 768px) {
    /* Use dynamic viewport height that adjusts for keyboard - iOS ONLY */
    body.is-ios html,
    body.is-ios {
      height: 100dvh;
      overflow: hidden;
    }

    body.is-ios .app {
      height: 100dvh;
    }

    body.is-ios .chat {
      height: 100dvh;
      display: flex;
      flex-direction: column;
    }

    /* Messages container uses remaining space - iOS ONLY */
    body.is-ios .chat__messages {
      flex: 1;
      overflow-y: auto;
      -webkit-overflow-scrolling: touch;
      overscroll-behavior: contain;
      padding: 60px 16px 20px 16px !important;
    }

    /* Input stays fixed at bottom with safe area - iOS ONLY */
    body.is-ios .composer {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: var(--panel);
      padding: 12px 16px;
      padding-bottom: max(12px, env(safe-area-inset-bottom));
      z-index: 100;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    /* Prevent body scroll when typing - iOS ONLY */
    body.is-ios.keyboard-open {
      position: fixed;
      width: 100%;
    }
  }
}