/* ============================================
   MOBILE OPTIMIZATIONS
   Responsive design and touch-friendly UI
   ============================================ */

/* ==========================================
   RESPONSIVE BREAKPOINTS REFERENCE
   --breakpoint-sm: 480px   (Small phones)
   --breakpoint-md: 768px   (Tablets)
   --breakpoint-lg: 1024px  (Desktop)
   --breakpoint-xl: 1440px  (Wide desktop)
   --breakpoint-2xl: 1920px (Ultra-wide)
   ========================================== */

/* ============================================
   UNIFIED PANEL - Mobile/Tablet Full-Page Slide-In
   Below split-view breakpoint (1024px), panels slide in full-page
   ============================================ */
@media (max-width: 1023px) {
  .panel,
  .dev-panel,
  .satellite-navigator {
    position: fixed !important;
    inset: 0 !important;
    width: 100% !important;
    height: 100% !important;
    max-width: 100% !important;
    max-height: 100% !important;
    border-radius: 0 !important;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--bg) !important;
    z-index: var(--z-sticky) !important;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    padding: 0 !important;
    box-shadow: none !important;
    top: 0 !important;
    right: 0 !important;
    left: 0 !important;
    bottom: 0 !important;
  }

  .panel.visible,
  .dev-panel.visible,
  .satellite-navigator.visible {
    display: flex !important;
    flex-direction: column;
    transform: translateX(0);
  }

  .panel-header,
  .settings-panel-header,
  .dev-panel-header,
  .satellite-nav-header {
    position: sticky;
    top: 0;
    background: var(--bg);
    padding: var(--space-4) var(--space-5) !important;
    border-bottom: 1px solid var(--border);
    z-index: var(--z-base);
    flex-shrink: 0;
  }

  .panel-content,
  .settings-panel-content {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* Remove scroll mask-image on full-screen mobile panels - cuts off content */
  .settings-panel-content {
    mask-image: none !important;
    -webkit-mask-image: none !important;
  }

  /* Panel rows - larger touch targets on mobile */
  .panel-row,
  .setting-row {
    padding: var(--space-4) var(--space-5) !important;
    min-height: 60px;
  }

  .panel-row-label,
  .setting-label {
    font-size: var(--text-base) !important;
    font-weight: 500;
  }

  .panel-row-desc,
  .setting-desc {
    font-size: var(--text-sm) !important;
    margin-top: var(--space-1);
  }

  /* Larger toggle on mobile/tablet */
  .toggle {
    width: 52px !important;
    height: 30px !important;
    border-radius: var(--radius-xl) !important;
  }

  .toggle::after {
    width: 26px !important;
    height: 26px !important;
  }

  .toggle.on::after {
    transform: translateX(22px) !important;
  }
}

/* Mobile breakpoint (--breakpoint-md: 768px) */
@media (max-width: 768px) {
  /* App container - constrain to viewport */
  .app {
    max-width: 100% !important;
    width: 100% !important;
    overflow-x: hidden;
  }

  /* Container adjustments */
  .container {
    padding: 0 !important;
    border-radius: 0 !important;
    height: 100vh !important;
    max-width: 100% !important;
  }

  /* Header - tighter on mobile, prevent right-side cutoff */
  header,
  .header {
    padding: var(--space-2) var(--space-3);
    position: sticky;
    top: 0;
    gap: var(--space-2);
    overflow: hidden;
  }

  .header-left {
    min-width: 0;
    overflow: hidden;
    flex: 1 1 0;
    gap: var(--space-1);
  }

  .header-wordmark {
    height: 20px;
    width: auto;
    max-width: 120px;
    flex-shrink: 1;
  }

  .header-right {
    flex-shrink: 0;
    gap: var(--space-1);
  }

  /* Hide less critical badges on mobile to save space */
  .encryption-badge,
  .connection-mode-badge,
  .status-badge {
    display: none !important;
  }

  header h1 {
    font-size: var(--text-base);
  }

  .header-buttons {
    gap: var(--space-1);
  }

  .header-buttons button,
  .header-btn {
    padding: var(--space-1) var(--space-2);
    min-width: 44px;
    min-height: 44px;
  }

  /* Context tracker - compact on mobile */
  .context-badge {
    gap: 4px;
  }
  .context-bar {
    width: 36px;
  }
  .context-text {
    font-size: 9px;
  }

  /* Messages area */
  #messages {
    padding: var(--space-3);
    padding-bottom: 140px; /* Space for input area */
    overflow-x: hidden; /* Prevent horizontal scroll */
  }

  .message {
    max-width: 85% !important;
    min-width: 80px; /* padding (28px) + min content (~50px) */
    padding: 10px 14px !important;
    font-size: var(--text-base);
    word-break: normal; /* Don't break words aggressively */
    overflow-wrap: break-word; /* Only break long words on overflow */
    overflow: visible; /* Don't make bubbles scrollable */
    box-sizing: border-box;
  }

  /* Edit button - always visible on mobile (no hover on touch) */
  .message.user .message-edit-btn {
    opacity: 0.6;
    position: absolute;
    left: -44px;
    top: 50%;
    transform: translateY(-50%);
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .message.user {
    position: relative;
    /* Remove display:flex - it breaks text wrapping */
  }

  /* Message wrapper mobile fixes */
  .message-wrapper {
    max-width: 85% !important;
  }

  .message-wrapper .message {
    min-width: 80px; /* padding (28px) + min content (~50px) */
    word-break: normal; /* Override break-word for wrapped messages */
    overflow-wrap: break-word; /* Only break on overflow, not every char */
  }

  /* Hide message actions by default on mobile — shown via tap toggle */
  .message .message-actions {
    display: none;
  }

  /* Show when message is tapped (JS toggles .actions-visible) */
  .message.actions-visible .message-actions {
    display: flex;
    opacity: 1;
  }

  /* Bottom dock - wraps input + mode tabs as single fixed unit */
  .bottom-dock {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-dropdown);
    background: var(--bg);
    display: flex;
    flex-direction: column;
  }

  /* Input area - flows naturally inside bottom-dock */
  .bottom-dock .input-area {
    position: static !important;
    padding: var(--space-3);
    background: var(--bg);
    border-top: none;
  }

  /* Mode tabs - flows naturally below input inside bottom-dock */
  .bottom-dock .mode-tabs {
    position: static;
    padding: 0;
    padding-bottom: env(safe-area-inset-bottom);
    background: var(--bg);
    border-top: 1px solid var(--border);
  }

  #textInput {
    font-size: 16px !important; /* Prevent zoom on iOS */
    padding: var(--space-3) var(--space-4);
    min-height: 44px; /* Touch target */
  }

  #sendBtn {
    width: 44px;
    height: 44px;
    min-width: 44px;
  }

  .mode-tab {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-base);
  }

  /* Settings panel - Mobile specifics (unified .panel handles full-page slide-in) */
  /* Buttons on mobile - touch-friendly sizing */
  .setting-btn {
    min-height: 44px;
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-base);
  }

  /* Inputs on mobile - touch-friendly sizing */
  .setting-input,
  .setting-select {
    min-height: 44px;
    font-size: var(--text-base) !important;
    padding: var(--space-3) !important;
  }

  /* Input groups - stack if needed on very small screens */
  .setting-input-group {
    flex-wrap: wrap;
  }

  /* Wide inputs - allow full width on mobile */
  .setting-input-wide {
    max-width: 100%;
  }

  /* Developer/Activity panel - uses unified .panel styles from developer.css */
  /* Mobile full-page slide-in handled by .panel.dev-panel rules */

  /* Satellites panel - Mobile full page slide-in (uses unified .panel class) */
  .panel.satellite-navigator {
    position: fixed !important;
    inset: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
    height: 100% !important;
    max-height: 100% !important;
    border-radius: 0 !important;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--bg) !important;
    z-index: var(--z-sticky) !important;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
  }

  .panel.satellite-navigator.visible {
    display: flex !important;
    transform: translateX(0);
  }

  /* Shortcuts panel */
  .shortcuts-panel-inner {
    max-width: 100% !important;
    margin: 0;
    border-radius: 0;
    height: 100%;
  }

  /* Voice mode */
  #voiceMode {
    padding: var(--space-5);
  }

  .voice-btn {
    width: 80px;
    height: 80px;
  }

  /* Avatars - smaller on mobile */
  .message-avatar {
    width: var(--space-6);
    height: var(--space-6);
    min-width: var(--space-6);
    font-size: var(--text-sm);
  }

  /* Toggle sizing handled by ≤1023px breakpoint (52×30px, 26px thumb) */

  /* File attachment */
  #attachBtn {
    width: 44px;
    height: 44px;
    min-width: 44px;
  }

  /* Image/file preview */
  #imagePreview {
    max-width: calc(100% - var(--space-6));
  }

  /* M2: Preview remove button — 44px touch target */
  .preview-remove {
    width: 44px;
    height: 44px;
    top: -14px;
    right: -14px;
    font-size: var(--text-base);
  }

  /* M6: Mode tab — 44px min touch target */
  .mode-tab {
    min-height: 44px;
  }

  /* M7: Setting description — readable on mobile */
  .setting-desc {
    font-size: var(--text-sm);
  }
}

/* Small phones (below --breakpoint-sm) */
@media (max-width: 375px) {
  /* Hide context badge text on small phones — bar only */
  .context-text {
    display: none;
  }

  header h1 {
    font-size: var(--text-base);
  }

  .message {
    font-size: var(--text-base);
    padding: var(--space-2) var(--space-3) !important;
  }

  .mode-tab {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
  }

  .voice-btn {
    width: 70px;
    height: 70px;
  }
}

/* Landscape mode */
@media (max-height: 500px) and (orientation: landscape) {
  /* Ensure header stays visible */
  header {
    position: sticky;
    top: 0;
    z-index: var(--z-dropdown);
    background: var(--bg);
  }

  /* Compact input area */
  .input-area {
    padding: var(--space-2) var(--space-3);
    /* bottom set by JS syncInputBottom() */
  }

  /* Compact mode tabs */
  .mode-tabs {
    bottom: 0;
    padding: var(--space-1) var(--space-3);
  }

  .mode-tab {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
  }

  /* Messages area with proper spacing */
  #messages, main.messages {
    padding-bottom: 90px;
    padding-top: var(--space-2);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* Compact messages */
  .message {
    padding: var(--space-2) var(--space-3) !important;
  }

  /* Smaller voice button */
  .voice-btn {
    width: 60px;
    height: 60px;
  }

  /* Panels in landscape - still fullscreen */
  .panel.dev-panel,
  .panel.satellite-navigator {
    max-height: 100% !important;
    height: 100% !important;
  }
}

/* Safe area insets for notched phones and large screens */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  .mode-tabs {
    padding-bottom: env(safe-area-inset-bottom);
  }

  #messages {
    padding-bottom: calc(160px + env(safe-area-inset-bottom));
  }

  /* Input area bottom is set dynamically by JS syncInputBottom() */
}

/* Fix for tall phones like S25 Ultra where browser chrome eats space */
@media (max-width: 768px) and (min-height: 800px) {
  #messages {
    padding-bottom: 180px;
  }

  /* Input area bottom is set dynamically by JS syncInputBottom() */
}

/* Touch feedback */
@media (hover: none) {
  button:active,
  .mode-tab:active,
  .setting-row:active {
    opacity: 0.7;
    transform: scale(0.98);
  }

  /* Disable hover effects on touch */
  button:hover,
  .mode-tab:hover {
    background: inherit;
  }
}

/* Touch optimization for mobile - prevent double-tap zoom and improve responsiveness */
@media (max-width: 768px) {
  button,
  a,
  input,
  textarea,
  select,
  .toggle,
  .mode-tab,
  .header-btn,
  .send-btn,
  .voice-btn,
  .input-btn,
  .message-edit-btn,
  .setting-row,
  .satellite-item,
  .satellite-action,
  .dev-tab,
  [role="button"],
  [role="tab"],
  [role="switch"],
  [role="option"] {
    touch-action: manipulation;
  }

  /* Ensure scrollable areas allow vertical scrolling */
  .messages,
  .settings-panel,
  .dev-panel-content,
  .satellite-list {
    touch-action: pan-y;
  }
}

/* Hide scrollbar on mobile but keep functionality */
@media (max-width: 768px) {
  #messages::-webkit-scrollbar {
    width: 0;
    display: none;
  }

  #messages {
    -ms-overflow-style: none;
    scrollbar-width: none;
  }
}

/* Prevent pull-to-refresh on chat */
body {
  overscroll-behavior-y: contain;
}

/* Overlay/Onboarding screens - ensure scrollable on mobile */
@media (max-width: 480px) {
  /* Compact context on small screens — already stacked from 768px rule */
  .context-bar {
    width: 28px;
  }
}

@media (max-width: 480px) {
  .overlay-screen {
    align-items: flex-start;
    padding: var(--space-4);
    padding-top: env(safe-area-inset-top, var(--space-4));
    padding-bottom: env(safe-area-inset-bottom, var(--space-4));
  }

  .overlay-card {
    margin: var(--space-4) 0;
    max-width: 100%;
    padding: var(--space-5);
  }
}

/* PWA standalone mode adjustments */
@media (display-mode: standalone) {
  header {
    padding-top: env(safe-area-inset-top, 12px);
  }
}