/* ════════════════════════════════════════════════════════════════════════════
   STYLE_M.CSS — Mobile-Responsive Overrides for Hero AI Home Page
   Load AFTER style.css:  <link rel="stylesheet" href="style_m.css">
   ════════════════════════════════════════════════════════════════════════════ */

/* ═══════ 1. CSS CUSTOM PROPERTIES — centralised scale tokens ═══════ */
:root {
  --font-body-size:    0.9rem;
  --content-padding:   20px;
  --bubble-max-w:      min(75vw, 520px);
  --msg-row-max-w:     760px;
  --header-icon-size:  32px;
  --input-icon-size:   36px;
  --modal-side-gap:    24px;
}

/* ═══════ 2. SIDEBAR BACKDROP OVERLAY ═══════ */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 199;               /* sits just below sidebar z-index: 200 */
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  transition: opacity 0.3s ease;
  opacity: 0;
}
.sidebar-backdrop.visible {
  display: block;
  opacity: 1;
}

/* ═══════ 3. 100dvh NORMALISATION ═══════
   Only apply to fixed-position overlays that need full coverage.
   body already uses height:100dvh and .main-wrapper uses flex:1
   in style.css — adding min-height here would exceed the viewport. */
.voice-overlay,
.auth-screen,
.modal-overlay {
  min-height: 100dvh;
}


/* ═══════ 9. SAFE AREA INSETS — notched/pill phones ═══════ */
@supports (padding-top: env(safe-area-inset-top)) {
  header {
    padding-top:    env(safe-area-inset-top);
    padding-left:   max(18px, env(safe-area-inset-left));
    padding-right:  max(18px, env(safe-area-inset-right));
  }
  .input-wrap {
    padding-bottom: max(12px, env(safe-area-inset-bottom));
    padding-left:   max(20px, env(safe-area-inset-left));
    padding-right:  max(20px, env(safe-area-inset-right));
  }
  .modal-overlay,
  .auth-screen {
    padding-top:    env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
  }
  .sidebar {
    padding-bottom: env(safe-area-inset-bottom);
  }
}


/* ══════════════════════════════════════════════════════════════════════════
   BREAKPOINT TIER 1 — TABLET (768px – 1023px)
   Sidebar as collapsible overlay, keep bubble widths close to desktop
   ══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 1023px) {
  :root {
    --font-body-size:    0.88rem;
    --content-padding:   16px;
    --header-icon-size:  36px;
  }

  /* --- Sidebar overlay mode (same as existing 768px but triggered earlier) --- */
  .sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 200;
    transform: translateX(-100%);
    will-change: transform;
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 6px 0 30px rgba(0, 0, 0, 0.5);
  }
  .menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* Ensure chat area takes full width — no leftover margin */
  .chat-area {
    width: 100%;
    margin-left: 0;
    flex: 1;
  }

  /* Header icons — ensure 40×40 touch targets */
  .hdr-temp-btn {
    min-width: 40px;
    min-height: 40px;
  }
  .header-model-pill {
    min-height: 40px;
    padding: 6px 12px;
  }

  /* Model select group — tablet keeps text visible */
  .model-select-group {
    min-height: 32px;
  }
}


/* ══════════════════════════════════════════════════════════════════════════
   BREAKPOINT TIER 2 — PHONE (≤767px)
   Single-column everything, sidebar full drawer, compact UI
   ══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 767px) {
  :root {
    --font-body-size:    0.85rem;
    --content-padding:   12px;
    --bubble-max-w:      min(85vw, 520px);
    --msg-row-max-w:     100%;
    --header-icon-size:  40px;
    --input-icon-size:   36px;
    --modal-side-gap:    16px;
  }

  /* --- Header --- */
  header {
    padding: 0 var(--content-padding);
    height: auto;
    min-height: var(--header-h);
  }
  .header-right {
    gap: 4px;
  }
  .hdr-temp-btn {
    width: var(--header-icon-size);
    height: var(--header-icon-size);
    min-width: 40px;
    min-height: 40px;
    font-size: 0.82rem;
  }
  .header-model-pill {
    min-height: 40px;
    min-width: 40px;
    padding: 6px 10px;
    font-size: 0.74rem;
  }
  .logo {
    font-size: 1.05rem;
  }

  /* --- Sidebar drawer --- */
  .sidebar {
    width: 280px;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 200;
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 6px 0 30px rgba(0, 0, 0, 0.5);
  }
  .chat-area {
    width: 100%;
    margin-left: 0;
  }

  /* --- Messages & bubbles --- */
  .msg-row {
    max-width: var(--msg-row-max-w);
    padding: 5px var(--content-padding);
  }
  .msg-content {
    font-size: var(--font-body-size);
  }
  .msg-content.user .bubble {
    max-width: var(--bubble-max-w);
    word-break: break-word;
    overflow-wrap: anywhere;
  }
  /* Code blocks — horizontal scroll, never overflow viewport */
  .msg-content .bubble pre,
  .code-block pre {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    max-width: calc(100vw - 2 * var(--content-padding) - 60px);
    font-size: 0.78rem;
    padding: 10px 12px;
  }
  .code-block {
    max-width: calc(100vw - 2 * var(--content-padding) - 60px);
  }
  .code-card {
    max-width: calc(100vw - 2 * var(--content-padding) - 40px);
  }

  /* --- Input bar --- */
  .input-wrap {
    padding: 6px var(--content-padding) 10px;
  }
  .input-row-outer {
    gap: 4px;
  }
  .input-box {
    padding: 8px;
    gap: 4px;
    border-radius: 12px;
  }
  #chatInput {
    font-size: var(--font-body-size);
  }
  .plus-btn,
  .mic-btn,
  .mute-btn,
  .send-btn {
    width: var(--input-icon-size);
    height: var(--input-icon-size);
    min-width: 36px;
    min-height: 36px;
  }
  #sendMicBtn {
    min-width: 36px;
    min-height: 36px;
  }
  .inline-model-select {
    display: none;
  }

  /* Input Row 2 — mode toggles wrap if needed */
  .input-row-2 {
    flex-wrap: wrap;
    gap: 4px;
  }
  #searchToggleBtn,
  #codeToggleBtn,
  #fastModeBtn {
    font-size: 0.72rem;
    padding: 3px 8px;
    height: 26px;
  }
  .tooltip-container {
    height: 26px;
    width: 62px;
    font-size: 0.72rem;
  }

  /* Talk button — hide text on phone */
  .cssbuttons-io-button span {
    display: none;
  }
  .cssbuttons-io-button {
    padding: 0.35em 2.4em 0.35em 0.6em;
    font-size: 11px;
    height: 2.2em;
  }
  .cssbuttons-io-button .icon {
    height: 1.6em;
    width: 1.6em;
  }

  /* Voice canvas — compact on phones */
  .voice-canvas-area {
    width: 40px;
    height: 40px;
  }
  .voice-canvas-area canvas {
    width: 40px !important;
    height: 40px !important;
  }
  .inline-voice-container {
    min-height: 48px;
    padding: 6px 10px;
    gap: 10px;
  }
  .voice-transcript-area {
    font-size: 0.88rem;
  }

  /* Scroll input into view when keyboard opens */
  .input-wrap:focus-within {
    scroll-margin-bottom: 20px;
  }

  /* --- Welcome screen --- */
  .welcome {
    padding: 30px var(--content-padding);
  }
  .welcome h1 {
    font-size: 1.25rem;
  }
  .welcome p {
    font-size: 0.84rem;
    max-width: 300px;
  }
  .intro-logo-wrap img {
    width: 120px;
    height: 90px;
  }
  .hero-intro-loader svg {
    height: 40px;
    width: 40px;
  }
  .suggestion-chips {
    gap: 6px;
    margin-top: 18px;
  }
  .chip {
    padding: 6px 12px;
    font-size: 0.76rem;
  }

  /* --- Modals — never touch screen edges --- */
  .modal-card {
    max-width: calc(100% - 2 * var(--modal-side-gap));
    width: calc(100% - 2 * var(--modal-side-gap));
    margin: 0 auto;
    border-radius: 18px;
  }
  .modal-overlay {
    padding: var(--modal-side-gap);
  }
  .help-card {
    max-width: calc(100% - 2 * var(--modal-side-gap));
    width: calc(100% - 2 * var(--modal-side-gap));
    padding: 24px 20px;
    border-radius: 18px;
  }
  .about-card {
    max-width: calc(100% - 2 * var(--modal-side-gap));
    width: calc(100% - 2 * var(--modal-side-gap));
    padding: 28px 20px;
    border-radius: 18px;
  }
  .help-item {
    gap: 10px;
  }
  .help-desc {
    word-break: break-word;
    overflow-wrap: anywhere;
  }

  /* Auth card */
  .auth-screen {
    padding: var(--modal-side-gap);
  }
  .auth-card {
    padding: 28px 20px 24px;
    max-width: calc(100% - 2 * var(--modal-side-gap));
    width: 100%;
    border-radius: 18px;
  }
  .auth-tabs {
    gap: 2px;
    padding: 3px;
  }
  .auth-tab {
    padding: 8px;
    font-size: 0.82rem;
  }
  .auth-google-btn {
    font-size: 0.84rem;
    padding: 10px;
  }
  .auth-google-btn svg {
    flex-shrink: 0;
  }

  /* Settings modal — collapse two-pane into single-column */
  .settings-card {
    flex-direction: column;
    max-width: calc(100% - 2 * var(--modal-side-gap));
    width: calc(100% - 2 * var(--modal-side-gap));
    height: auto;
    max-height: 85vh;
  }
  .settings-nav {
    width: 100%;
    flex-direction: row;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 10px 8px;
    gap: 4px;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  .settings-nav::-webkit-scrollbar {
    display: none;
  }
  .settings-nav-section-label {
    display: none;
  }
  .settings-nav-item {
    white-space: nowrap;
    padding: 7px 12px;
    font-size: 0.78rem;
    border-radius: 20px;
    gap: 6px;
  }
  .settings-panel {
    padding: 20px;
  }

  /* Theme buttons in settings */
  .theme-switcher {
    gap: 8px;
  }
  .theme-btn {
    padding: 8px 6px;
    font-size: 0.7rem;
    gap: 4px;
  }
  .theme-preview {
    width: 36px;
    height: 24px;
  }

  /* --- Notifications — centre on mobile --- */
  .custom-notification {
    right: auto;
    left: 50%;
    transform: translateX(-50%) translateY(-120%);
    max-width: calc(100vw - 32px);
    width: calc(100vw - 32px);
    top: 16px;
    border-radius: 12px;
  }
  .custom-notification.show {
    transform: translateX(-50%) translateY(0);
  }

  /* Confirm dialog */
  .custom-confirm {
    max-width: calc(100% - 32px);
  }

  /* Voice overlay — compact layout */
  .voice-overlay .voice-modal {
    padding: 30px 20px;
  }
  .voice-title {
    font-size: 1.25rem;
  }
  .voice-sub {
    font-size: 0.82rem;
    margin-bottom: 28px;
  }
  .ball-container {
    width: 160px;
    height: 160px;
    margin-bottom: 30px;
  }
  #voiceCanvas {
    width: 160px;
    height: 160px;
  }
  .voice-controls {
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
  }
  .v-btn {
    padding: 10px 20px;
    font-size: 0.82rem;
  }
  .voice-transcript {
    max-width: calc(100vw - 40px);
    font-size: 0.82rem;
    padding: 10px 14px;
    max-height: 180px;
  }

  /* History items */
  .history-item {
    padding: 10px 12px;
  }
  .history-delete-btn {
    opacity: 0.7;          /* always visible on touch — no hover */
  }

  /* Temp banner */
  .temp-banner {
    font-size: 0.74rem;
    padding: 6px var(--content-padding);
  }

  /* Modal tabs */
  .p-tab {
    font-size: 0.75rem;
    padding: 7px 10px;
  }

  /* Table scrolls horizontally */
  .msg-table-wrap {
    max-width: calc(100vw - 2 * var(--content-padding) - 60px);
  }

  /* Typing indicator */
  .loader {
    font-size: 0.82rem;
  }
}


/* ══════════════════════════════════════════════════════════════════════════
   BREAKPOINT TIER 3 — SMALL PHONES (≤380px)
   Extra shrink pass for very tight screens
   ══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 380px) {
  :root {
    --font-body-size:    0.82rem;
    --content-padding:   8px;
    --modal-side-gap:    10px;
    --input-icon-size:   34px;
  }

  /* Header — tighter */
  header {
    padding: 0 8px;
  }
  .hdr-temp-btn {
    width: 36px;
    height: 36px;
    min-width: 36px;
    min-height: 36px;
    font-size: 0.72rem;
    padding: 0;
  }
  .header-right {
    gap: 3px;
  }
  .logo {
    font-size: 0.95rem;
    gap: 5px;
  }
  .logo-dot {
    width: 6px;
    height: 6px;
  }

  /* Model pill — icon-only on very small screens */
  .header-model-pill {
    padding: 4px 8px;
    min-width: 36px;
    min-height: 36px;
    font-size: 0;                 /* hide text */
    gap: 0;
  }
  .header-model-pill i,
  .header-model-pill svg {
    font-size: 0.8rem;
  }
  /* Restore icon visibility when text is hidden */
  .header-model-pill::before {
    font-size: 0.8rem;
  }

  /* Model select in input row 2 — shrink */
  .model-select-group {
    max-width: 90px;
    overflow: hidden;
  }
  .model-select-group select {
    font-size: 0.68rem !important;
    padding-right: 16px !important;
  }

  /* Input toggles — icon only */
  #searchToggleBtn,
  #codeToggleBtn {
    font-size: 0;                 /* hide text */
    padding: 4px 8px;
    width: 30px;
    height: 24px;
    justify-content: center;
  }
  #searchToggleBtn i,
  #codeToggleBtn i {
    font-size: 0.72rem !important;
    margin: 0;
  }
  /* Tooltip / Talk button — smaller */
  .tooltip-container {
    width: 30px;
    height: 24px;
    font-size: 0;
  }
  .tooltip-container .text i {
    font-size: 0.72rem;
  }
  .tooltip-container .text {
    font-size: 0;
    gap: 0;
  }

  /* Fast mode button */
  #fastModeBtn {
    width: 26px;
    height: 24px;
    padding: 2px;
    font-size: 0;
    justify-content: center;
  }
  #fastModeBtn i {
    font-size: 0.68rem !important;
  }

  /* Input icons */
  .plus-btn,
  .mic-btn,
  .mute-btn,
  .send-btn,
  #sendMicBtn {
    width: var(--input-icon-size);
    height: var(--input-icon-size);
    min-width: 34px;
    min-height: 34px;
    font-size: 0.8rem;
  }
  .input-box {
    padding: 6px;
    gap: 3px;
    border-radius: 10px;
  }
  #chatInput {
    font-size: 0.82rem;
  }

  /* Messages — tighter padding */
  .msg-row {
    padding: 4px var(--content-padding);
    gap: 8px;
  }
  .msg-avatar {
    width: 26px;
    height: 26px;
  }
  .msg-avatar.ai img {
    width: 26px;
    height: 26px;
  }
  .msg-content {
    font-size: var(--font-body-size);
    line-height: 1.65;
  }
  .msg-content.user .bubble {
    padding: 8px 12px;
    border-radius: 12px 12px 3px 12px;
    font-size: var(--font-body-size);
  }

  /* Welcome screen — compact */
  .welcome h1 {
    font-size: 1.1rem;
  }
  .welcome p {
    font-size: 0.78rem;
    max-width: 260px;
  }
  .intro-logo-wrap img {
    width: 100px;
    height: 75px;
  }
  .hero-intro-loader svg {
    height: 32px;
    width: 32px;
  }
  .chip {
    padding: 5px 10px;
    font-size: 0.72rem;
  }

  /* Auth card — extra compact */
  .auth-card {
    padding: 22px 16px 20px;
    border-radius: 16px;
  }
  .auth-logo {
    font-size: 1.15rem;
    margin-bottom: 20px;
  }
  .auth-input {
    padding: 10px 12px;
    font-size: 0.84rem;
  }
  .auth-btn {
    padding: 10px;
    font-size: 0.88rem;
  }

  /* Modal cards */
  .modal-card,
  .help-card,
  .about-card {
    border-radius: 14px;
  }
  .modal-header {
    padding: 18px 16px 0;
  }
  .modal-title {
    font-size: 1rem;
  }
  .modal-body {
    padding: 16px;
  }
  .modal-footer {
    padding: 12px 16px 16px;
  }
  .help-card {
    padding: 20px 16px;
  }
  .help-icon {
    width: 30px;
    height: 30px;
    font-size: 0.8rem;
  }
  .help-title {
    font-size: 0.82rem;
  }
  .help-desc {
    font-size: 0.76rem;
  }

  /* Settings — ultra compact */
  .settings-nav-item {
    padding: 5px 8px;
    font-size: 0.72rem;
  }
  .settings-panel {
    padding: 16px 14px;
  }
  .settings-panel-title {
    font-size: 0.95rem;
  }

  /* Voice overlay */
  .ball-container {
    width: 120px;
    height: 120px;
    margin-bottom: 20px;
  }
  #voiceCanvas {
    width: 120px;
    height: 120px;
  }
  .voice-title {
    font-size: 1.1rem;
  }
  .voice-sub {
    font-size: 0.78rem;
    margin-bottom: 20px;
  }
  .v-btn {
    padding: 8px 16px;
    font-size: 0.78rem;
    border-radius: 10px;
  }
  .voice-transcript {
    max-height: 140px;
    font-size: 0.78rem;
    padding: 8px 12px;
  }

  /* Notification — tight but visible */
  .custom-notification {
    top: 10px;
    max-width: calc(100vw - 20px);
    width: calc(100vw - 20px);
    padding: 10px 14px;
    font-size: 0.82rem;
    border-radius: 10px;
  }

  /* Input hint */
  .input-hint {
    font-size: 0.65rem;
    margin-top: 4px;
  }

  /* Code blocks — extra compact */
  .code-block code {
    font-size: 0.78rem;
  }
  .code-lang {
    font-size: 0.65rem;
  }
  .code-copy-btn {
    font-size: 0.7rem;
    padding: 2px 4px;
  }
}


/* ══════════════════════════════════════════════════════════════════════════
   8. TOUCH & INTERACTION — hover fallbacks for touch devices
   ══════════════════════════════════════════════════════════════════════════ */
@media (hover: none) and (pointer: coarse) {
  /* Provide :active tap feedback since :hover doesn't work on touch */
  .hdr-temp-btn:active {
    background: var(--surface3);
    color: var(--text);
    transform: scale(0.95);
  }
  .theme-btn:active {
    border-color: rgba(25, 195, 125, 0.4);
    color: var(--text);
  }
  .history-item:active {
    background: var(--surface2);
    color: var(--text);
  }
  .user-menu-item:active {
    background: var(--surface2);
    color: var(--text);
  }
  .plus-btn:active {
    background: var(--surface3);
    color: var(--text);
  }
  .plus-menu-item:active {
    background: var(--surface2);
    color: var(--text);
  }
  .chip:active {
    background: var(--surface2);
    color: var(--text);
    border-color: rgba(255, 255, 255, 0.1);
  }
  .new-chat-btn:active {
    background: var(--surface2);
    color: var(--text);
  }
  .sidebar-infinsight-btn:active {
    background: var(--surface2);
    color: var(--text);
  }
  .send-btn:active {
    opacity: 0.8;
    transform: scale(0.95);
  }
  .mic-btn:active {
    background: var(--surface2);
    color: var(--text);
  }
  .mute-btn:active {
    background: var(--surface2);
    color: var(--accent);
  }
  .copy-msg-btn:active {
    color: var(--text);
    background: var(--surface2);
  }
  .modal-close:active {
    background: var(--surface3);
    color: var(--text);
  }
  .modal-save-btn:active {
    opacity: 0.85;
  }
  .auth-btn:active {
    opacity: 0.85;
    transform: translateY(0);
  }
  .auth-google-btn:active {
    background: var(--surface3);
  }
  .v-btn:active {
    opacity: 0.8;
    transform: scale(0.97);
  }
  .settings-nav-item:active {
    background: var(--surface2);
    color: var(--text);
  }
  .confirm-btn:active {
    opacity: 0.85;
    transform: scale(0.98);
  }
  #searchToggleBtn:active,
  #codeToggleBtn:active,
  #fastModeBtn:active {
    opacity: 0.8;
  }
  .cssbuttons-io-button:active {
    opacity: 0.9;
    transform: scale(0.97);
  }
  .wait-pill-btn:active:not(:disabled) {
    background: rgba(235, 87, 87, 0.22);
    transform: scale(0.97);
  }

  /* History delete button — always visible on touch */
  .history-delete-btn {
    opacity: 0.6;
  }

  /* Disable tooltip expand animation on touch — just show icon */
  .tooltip-container:hover {
    width: auto;
    border-color: var(--border);
  }
  .tooltip-container:hover span:last-child {
    transform: scale(0);
  }
  .tooltip-container:hover .text {
    opacity: 1;
    transform: scale(1);
    left: 0;
    top: 0;
  }
  .tooltip-container:hover .tooltip {
    display: none;
  }

  /* Disable [data-tip] tooltip hover on touch — tap-only */
  [data-tip]:hover::after {
    display: none;
  }
}


/* ══════════════════════════════════════════════════════════════════════════
   LANDSCAPE PHONE — prevent header/input squeeze
   ══════════════════════════════════════════════════════════════════════════ */
@media (max-height: 500px) and (orientation: landscape) {
  header {
    height: 44px;
    min-height: 44px;
  }
  .welcome {
    padding: 16px var(--content-padding);
  }
  .welcome h1 {
    font-size: 1.1rem;
    margin-bottom: 4px;
  }
  .intro-logo-wrap img {
    width: 80px;
    height: 60px;
  }
  .hero-intro-loader svg {
    height: 28px;
    width: 28px;
  }
  .suggestion-chips {
    margin-top: 10px;
  }
  .input-wrap {
    padding: 4px var(--content-padding) 6px;
  }
  .input-box {
    padding: 6px;
  }
  /* Voice overlay — horizontal layout */
  .voice-overlay .voice-modal {
    padding: 16px 24px;
  }
  .ball-container {
    width: 100px;
    height: 100px;
    margin-bottom: 16px;
  }
  #voiceCanvas {
    width: 100px;
    height: 100px;
  }
  .voice-title {
    font-size: 1rem;
    margin-bottom: 4px;
  }
  .voice-sub {
    font-size: 0.76rem;
    margin-bottom: 16px;
  }
  .voice-transcript {
    max-height: 100px;
  }
}


/* ══════════════════════════════════════════════════════════════════════════
   ACCESSIBILITY — keyboard focus visible on all interactive elements
   ══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 767px) {
  *:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
  }
}