/* css/responsive.css - Media queries, touch interactions, notch & safe areas */

/* ===================================================================
   1. Global Safe Areas, PWA Standalone & Viewport Hardening
   =================================================================== */

/* Notch & edge-to-edge landscape safe areas */
#app-shell {
  padding-left: env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
}

#top-bar {
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}

#bottom-nav {
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}

/* Modal and bottom-sheet visible viewport bounds */
.bottom-sheet {
  max-height: 86vh;
  max-height: 86dvh;
  overscroll-behavior: contain;
}

.modal-card {
  max-height: 90vh;
  max-height: 90dvh;
  overscroll-behavior: contain;
}

#toast-container {
  top: calc(env(safe-area-inset-top, 0px) + 64px);
  max-width: calc(100vw - 24px);
}

.toast {
  text-align: center;
}

/* Touch devices: eliminate sticky hovers */
@media (hover: none) {
  .word-token:hover:not(.sel-token):not(.karaoke-active) {
    background-color: transparent;
    transform: none;
  }
  .dict-item-card:hover {
    transform: none;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
    border-color: var(--border-color);
  }
  .recent-item:hover {
    border-color: var(--border-color);
  }
  .dict-quick-tag:hover {
    transform: none;
  }
}

/* iOS Standalone PWA Mode (Add to Home Screen) */
@media all and (display-mode: standalone) {
  #top-bar {
    padding-top: max(env(safe-area-inset-top, 0px), 16px);
    height: calc(var(--top-bar-height) + max(env(safe-area-inset-top, 0px), 16px));
  }
  #bottom-nav {
    padding-bottom: max(env(safe-area-inset-bottom, 0px), 16px);
    height: calc(var(--bottom-bar-height) + max(env(safe-area-inset-bottom, 0px), 16px));
  }
}


/* ===================================================================
   2. Mobile Phones (max-width: 767px)
   =================================================================== */

@media (max-width: 767px) {
  #app-shell {
    width: 100%;
    max-width: 100%;
    height: 100%;
    height: 100dvh;
    border-left: none;
    border-right: none;
    border-radius: 0;
    margin: 0;
  }

  #main-content {
    padding-bottom: calc(var(--bottom-bar-height) + env(safe-area-inset-bottom, 0px) + 12px);
  }

  /* Keep floating phrase selection bar safely above bottom nav */
  #phrase-bar {
    bottom: calc(var(--bottom-bar-height) + env(safe-area-inset-bottom, 0px) + 12px);
  }

  /* Prevent awkward double bottom gaps in mobile dictionary */
  .dict-view-container {
    padding: 18px 12px 24px 12px;
  }
}

/* Small to Medium Phones (max-width: 480px) */
@media (max-width: 480px) {
  .view {
    padding: 12px;
  }
  .card {
    padding: 14px;
  }
  .action-row {
    gap: 8px;
  }
  .action-row .btn {
    flex: 1 1 calc(50% - 4px);
    padding: 10px 8px;
    font-size: 13px;
    line-height: 1.25;
    text-align: center;
    min-height: 42px;
  }
  .action-row #btn-analyze {
    flex: 1 1 100%;
    min-height: 44px;
  }
  .reader-toolbar {
    padding: 8px 10px;
    gap: 6px;
  }
  .toolbar-group {
    flex-wrap: wrap;
    gap: 6px;
  }
  .sentence-card {
    padding: 16px 12px;
    min-height: 0;
  }
  .full-text-container {
    padding: 14px 10px;
  }
  .word-token {
    margin: 0 1px;
    padding: 2px;
  }
  .bottom-sheet {
    padding: 16px 16px calc(20px + env(safe-area-inset-bottom, 0px));
  }
  .sheet-hanzi-title {
    font-size: 34px;
  }
  .def-text {
    font-size: 17px;
  }
  .settings-row {
    flex-wrap: wrap;
  }
  .settings-control {
    margin-left: auto;
  }
  .nav-tab span {
    font-size: 10.5px;
  }
  .modal-card {
    padding: 18px;
  }
  .trans-lens-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .trans-lens-tabs {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }
  .ai-word-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .ai-word-header button {
    width: 100%;
    justify-content: center;
  }
  .punctuation-token {
    font-size: 0.85em;
    padding-bottom: 2px;
  }
}

/* Extra-small screens (e.g. 320px - 350px) */
@media (max-width: 350px) {
  .brand-title {
    display: none;
  }
  .nav-tab span {
    font-size: 9.5px;
  }
}


/* ===================================================================
   3. Tablet & Desktop Shared Upgrades (min-width: 768px)
   =================================================================== */

@media (min-width: 768px) {
  /* Reorganize header & navigation hierarchy:
     1. #top-bar (Logo, Languages, Theme) sits at the top (order: -2)
     2. #bottom-nav becomes a clean desktop tab bar (order: -1)
     3. #main-content displays views below */
  
  #top-bar {
    order: -2;
    height: 60px;
    padding: 0 24px;
  }

  #bottom-nav {
    position: static;
    order: -1;
    height: 48px;
    padding: 0 20px;
    border-top: none;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-surface);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 8px;
    max-width: 100%;
  }

  .nav-tab {
    flex: 0 0 auto;
    flex-direction: row;
    height: 36px;
    padding: 6px 16px;
    border-radius: var(--radius-md);
    gap: 8px;
    color: var(--text-secondary);
    transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .nav-tab:hover {
    background: var(--bg-muted);
    color: var(--text-primary);
  }

  .nav-tab.active {
    background: var(--accent-subtle);
    color: var(--accent);
  }

  .nav-tab.active svg {
    transform: none;
  }

  .nav-tab span {
    font-size: 13px;
    font-weight: 600;
  }

  #main-content {
    padding-bottom: 32px;
  }

  /* Multi-column dictionary search results */
  .dict-results-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  /* Expanded Radicals Browser */
  .dict-radical-grid {
    grid-template-columns: repeat(auto-fill, minmax(88px, 1fr));
    max-height: 280px;
    gap: 8px;
  }

  /* Reader Sentence Card on tablet */
  .sentence-card {
    max-width: 860px;
    margin: 0 auto 18px auto;
    padding: 28px 24px;
  }

  .reader-toolbar {
    max-width: 860px;
    margin: 0 auto 14px auto;
  }

  .full-text-container {
    max-width: 860px;
    margin: 0 auto;
  }

  /* Slightly expand bottom-sheet on tablet portrait */
  .bottom-sheet {
    max-width: 720px;
    border-top-left-radius: 28px;
    border-top-right-radius: 28px;
    padding: 24px 28px;
  }
}


/* ===================================================================
   4. Tablet Landscape & Laptop Studio Layout (min-width: 1024px)
   =================================================================== */

@media (min-width: 1024px) {
  #app-shell {
    max-width: 1240px;
    height: 100dvh;
    margin: 0 auto;
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    background-color: var(--bg-base);
  }

  #top-bar {
    height: 62px;
    padding: 0 28px;
  }

  #bottom-nav {
    height: 50px;
    padding: 0 28px;
    gap: 10px;
  }

  .nav-tab {
    height: 38px;
    padding: 7px 20px;
    font-size: 13.5px;
  }

  /* --- VIEW: Input (2-Column Desktop Workbench) --- */
  #view-input.active {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 24px;
    align-items: start;
    max-width: 1180px;
    margin: 0 auto;
    padding: 24px;
  }

  #view-input .card {
    margin-bottom: 0;
  }

  #view-input .textarea-box {
    height: 220px;
    font-size: 19px;
  }

  #view-input .samples-container {
    margin-top: 0;
    position: sticky;
    top: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 18px;
    box-shadow: var(--card-shadow);
  }

  #view-input .recent-list {
    max-height: 440px;
    overflow-y: auto;
  }

  /* --- VIEW: Dictionary (Hero & Multi-Column Results) --- */
  .dict-view-container {
    max-width: 1180px;
    padding: 32px 24px;
  }

  .dict-hero-title {
    font-size: 28px;
  }

  .dict-results-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  /* --- VIEW: Reader (Balanced Typography & Side-by-Side Lenses) --- */
  .sentence-card {
    max-width: 1060px;
    margin: 0 auto 20px auto;
    padding: 32px 36px;
  }

  .reader-toolbar {
    max-width: 1060px;
    margin: 0 auto 16px auto;
  }

  .full-text-container {
    max-width: 1060px;
    margin: 0 auto;
    padding: 32px 36px;
  }

  /* 3 Translation Lenses side-by-side when "View All 3" is selected */
  .trans-lens-stacked {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
  }

  .trans-lens-stacked .trans-lens-card {
    margin-bottom: 0 !important;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
  }

  /* --- VIEW: Settings (Comfortable Reading Width) --- */
  #view-settings {
    max-width: 860px;
    margin: 0 auto;
    padding: 24px;
  }

  /* --- WORD INSPECTOR & AI ANALYSIS MODAL STUDIO --- */
  /* Transforms bottom sheet into a centered luxury dialog on desktop */
  .bottom-sheet {
    position: fixed;
    top: 50% !important;
    left: 50% !important;
    right: auto !important;
    bottom: auto !important;
    width: 92vw;
    max-width: 960px;
    max-height: 85vh;
    max-height: 85dvh;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.28), 0 4px 16px rgba(0, 0, 0, 0.1);
    transform: translate(-50%, -46%) scale(0.97) !important;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease, visibility 0s linear 0.25s;
    padding: 24px 28px;
    overflow-y: auto;
  }

  .bottom-sheet.active {
    transform: translate(-50%, -50%) scale(1) !important;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease, visibility 0s;
  }

  .sheet-handle {
    display: none;
  }

  .sheet-header {
    margin-bottom: 18px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-color);
  }

  /* 2-Column Inspector: Visual Hanzi on Left, AI Deep Analysis on Right */
  .sheet-grid-body {
    display: grid;
    grid-template-columns: 380px 1fr;
    column-gap: 28px;
    align-items: start;
  }

  .sheet-col-primary {
    display: flex;
    flex-direction: column;
    min-width: 0;
  }

  .sheet-col-secondary {
    display: flex;
    flex-direction: column;
    min-width: 0;
    gap: 12px;
  }

  .sheet-col-secondary > div {
    margin-top: 0 !important;
  }

  /* Modals on desktop */
  .modal-card {
    max-width: min(600px, 92vw);
    padding: 28px;
  }
}


/* ===================================================================
   5. Large Desktop & High-Resolution Displays (min-width: 1280px)
   =================================================================== */

@media (min-width: 1280px) {
  #app-shell {
    max-width: 1440px;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.04);
  }

  /* Input Studio: expanded editor + full history */
  #view-input.active {
    grid-template-columns: 1fr 400px;
    max-width: 1360px;
    gap: 28px;
  }

  #view-input .textarea-box {
    height: 240px;
    font-size: 20px;
  }

  /* Dictionary: 3-column responsive card grid */
  .dict-view-container {
    max-width: 1360px;
    padding: 36px 32px;
  }

  .dict-results-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  /* Reader: wide reading canvas with comfortable max-width */
  .sentence-card {
    max-width: 1200px;
    padding: 36px 42px;
  }

  .reader-toolbar {
    max-width: 1200px;
  }

  .full-text-container {
    max-width: 1200px;
    padding: 36px 42px;
  }

  /* Expanded Word Inspector modal on large screens */
  .bottom-sheet {
    max-width: 1020px;
    padding: 28px 32px;
  }

  .sheet-grid-body {
    grid-template-columns: 400px 1fr;
    column-gap: 32px;
  }
}