/* ═══════════════════════════════════════
   MOBILE RESPONSIVE — CONSOLIDATED
   All mobile media queries in one block.
   ═══════════════════════════════════════ */

@media (max-width: 768px) {

    /* ── Layout ──
       Reserve space for fixed bottom-nav (56px + safe area).
       Using calc instead of margin on input — keeps chat-layout a clean
       flex container and guarantees the input is always visible. */
    .chat-layout {
        flex-direction: column;
        height: calc(100dvh - 56px - env(safe-area-inset-bottom, 0px));
    }

    @supports not (height: 100dvh) {
        .chat-layout {
            height: calc(100vh - 56px - env(safe-area-inset-bottom, 0px));
        }
    }

    .chat-main {
        min-height: 0;
        flex: 1;
    }

    /* ── Sidebar ── */
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: 100%;
        z-index: 1000;
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        will-change: transform;
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.5);
    }

    .sidebar-toggle {
        display: block;
    }

    .sidebar-item {
        padding: 12px 14px;
    }

    .sidebar-item-menu-btn {
        display: flex;
        width: 32px;
        height: 32px;
        font-size: 16px;
    }

    .sidebar-link,
    .sidebar-theme-toggle,
    .sidebar-nav-link {
        padding: 10px 8px;
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    /* ── Chat header ── */
    .chat-header {
        padding: 10px 12px;
        gap: 8px;
        padding-top: calc(10px + var(--safe-top));
    }

    .chat-title {
        font-size: 13px;
        min-width: 0;
    }

    .chat-header-right {
        gap: 6px;
    }

    .chat-model {
        font-size: 10px;
        padding: 3px 6px;
        max-width: 90px;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .chat-balance {
        font-size: 10px;
    }

    .btn-shortcuts {
        display: none;
    }

    /* ── Chat messages ── */
    .chat-messages {
        -webkit-overflow-scrolling: touch;
        padding: 12px 10px;
        padding-bottom: 8px;
    }

    .msg {
        max-width: 92%;
    }

    /* Mobile: tap to show/hide actions (no hover) — use opacity to preserve layout */
    .msg:hover .msg-actions {
        opacity: 0;
        pointer-events: none;
    }

    .msg-actions.visible {
        opacity: 1;
        pointer-events: auto;
    }

    .msg-action-btn {
        padding: 6px 12px;
        font-size: 12px;
        min-height: 44px;
    }

    .btn-mic, .btn-improve {
        width: 44px;
        height: 44px;
    }

    /* ── Chat input ──
       Input sits naturally at the bottom of .chat-main flex column.
       No sticky/margin hacks — parent height already excludes bottom-nav. */
    .chat-input-area {
        flex-shrink: 0;
        padding: 10px 12px;
        padding-bottom: calc(10px + var(--safe-bottom));
        border-top: 1px solid var(--line);
        background: var(--bg);
    }

    .btn-send,
    .btn-stop {
        width: 44px;
        height: 44px;
    }

    #msgInput {
        min-height: 44px;
        font-size: 16px; /* Prevent iOS zoom on focus */
    }

    /* ── Login page ── */
    .login-panel {
        padding: 24px 16px;
    }

    .login-logo {
        font-size: 22px;
    }

    .login-vault-art {
        font-size: 6px;
        line-height: 1.1;
        margin-bottom: 10px;
    }

    .login-btn-enter {
        min-height: 48px;
    }

    .btn-max,
    .btn-telegram {
        min-height: 48px;
    }

    /* ── Pip-Boy page ── */
    .pipboy-page {
        padding: 12px;
        padding-top: calc(12px + var(--safe-top));
        padding-bottom: calc(72px + var(--safe-bottom));
        padding-left: calc(12px + var(--safe-left));
        padding-right: calc(12px + var(--safe-right));
        -webkit-overflow-scrolling: touch;
    }

    .pipboy-header {
        margin-bottom: 14px;
    }

    .pipboy-title {
        font-size: 18px;
    }

    .pipboy-card {
        padding: 14px 12px;
        border-radius: 10px;
        margin-bottom: 12px;
    }

    .pipboy-tab {
        padding: 8px 14px;
        min-height: 36px;
    }

    /* ── Billing page ── */
    .billing-page {
        padding: 12px;
        padding-top: calc(12px + var(--safe-top));
        padding-bottom: calc(72px + var(--safe-bottom));
        padding-left: calc(12px + var(--safe-left));
        padding-right: calc(12px + var(--safe-right));
        -webkit-overflow-scrolling: touch;
    }

    .billing-hero {
        padding: 20px 14px;
    }

    .billing-balance-value {
        font-size: 36px;
    }

    .billing-plan-card {
        padding: 14px;
    }

    .billing-subscribe-btn {
        min-height: 44px;
    }

    .billing-topup-btn {
        min-height: 44px;
        padding: 10px 6px;
    }

    /* ── Settings page ── */
    .settings-page {
        padding: 12px;
        padding-top: calc(12px + var(--safe-top));
        padding-bottom: calc(72px + var(--safe-bottom));
        padding-left: calc(12px + var(--safe-left));
        padding-right: calc(12px + var(--safe-right));
        -webkit-overflow-scrolling: touch;
    }

    .settings-section {
        padding: 14px 12px;
    }

    .persona-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 8px;
    }

    .persona-card {
        padding: 10px 6px;
        min-height: 44px;
    }

    /* Persona card image — skeleton shimmer while loading (prevent layout jump) */
    .persona-card-image {
        background: var(--panel-2);
        min-height: 60px;
    }

    /* Empty-minimal state: centered, smaller icon on mobile */
    .chat-empty-minimal {
        padding: 24px 16px;
        text-align: center;
    }
    .chat-empty-minimal .empty-icon {
        font-size: 32px;
    }

    .settings-model-group-name {
        padding: 10px 0;
        min-height: 44px;
        display: flex;
        align-items: center;
    }

    .settings-model-option {
        padding: 10px 12px;
        min-height: 44px;
    }

    .settings-model-list {
        padding-left: 4px;
    }

    .length-btn,
    .theme-btn {
        min-height: 44px;
        padding: 10px 8px;
    }

    /* ── Bottom navigation ── */
    .bottom-nav {
        display: flex;
    }

    .nav-item {
        padding: 10px 0 6px;
        min-height: 56px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }

    .nav-item-icon {
        font-size: 20px;
    }

    /* ── Model picker ── */
    .model-picker {
        max-height: 80vh;
        border-radius: 12px;
        padding: 16px;
    }

    .model-option {
        padding: 12px;
        min-height: 44px;
    }

    /* ── Toasts ── */
    #toastContainer {
        top: auto;
        bottom: 120px;
        right: 12px;
        left: 12px;
    }

    .toast {
        max-width: 100%;
    }

    /* ── Code blocks ── */
    .code-copy-btn {
        opacity: 1;
        padding: 4px 10px;
        font-size: 11px;
    }

    /* ── Scroll-to-bottom ── lifted above input bar + bottom-nav so it doesn't
       cover the message input. input-area is ~60px, bottom-nav 56px → total ~116px. */
    .scroll-to-bottom {
        bottom: calc(128px + var(--safe-bottom));
        right: 12px;
        width: 40px;
        height: 40px;
    }

    /* ── Page back buttons ── */
    .page-back-btn {
        padding: 8px 12px;
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }

    /* ── Safe areas: left/right content padding ── */
    .chat-messages {
        padding-left: calc(10px + var(--safe-left));
        padding-right: calc(10px + var(--safe-right));
    }

    .chat-input-area {
        padding-left: calc(12px + var(--safe-left));
        padding-right: calc(12px + var(--safe-right));
    }

    .chat-header {
        padding-left: calc(12px + var(--safe-left));
        padding-right: calc(12px + var(--safe-right));
    }

    /* ── Bottom nav safe area is already handled via env() ── */

    /* ── Onboarding compact on mobile ── */
    .empty-features {
        grid-template-columns: 1fr;
        gap: 10px;
        margin-top: 20px;
    }

    .empty-feature {
        padding: 12px;
    }

    .empty-icon {
        font-size: 40px;
        margin-top: 8px;
    }

    .empty-text {
        font-size: 15px;
        text-align: center;
        padding: 0 12px;
    }

    .empty-hint {
        text-align: center;
        padding: 0 12px;
    }

    /* ── Touch targets: ensure all interactive elements are ≥44px ── */
    .btn-icon,
    .sidebar-toggle,
    .context-bar,
    .msg-action-btn,
    .empty-prompt-btn {
        min-height: 44px;
    }

    .context-bar {
        padding: 10px 12px;
    }

    /* ── Prevent horizontal bounce scroll ── */
    html, body {
        overscroll-behavior-x: none;
    }

    /* Hide context bar label on narrow screens, keep bar+% visible */
    .context-bar-label {
        display: none;
    }

    /* ── Avatars (new feature) ── */
    .avatar-page {
        padding: 12px;
        padding-top: calc(12px + var(--safe-top));
        padding-bottom: calc(72px + var(--safe-bottom));
        padding-left: calc(12px + var(--safe-left));
        padding-right: calc(12px + var(--safe-right));
    }

    .avatar-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 10px;
    }

    .avatar-card {
        padding: 10px;
    }

    .avatar-card-img {
        width: 64px;
        height: 64px;
    }

    .avatar-card-name {
        font-size: 13px;
    }

    .avatar-wizard {
        padding: 16px 12px;
    }

    .avatar-trait-chip {
        padding: 8px 12px;
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }

    .avatar-style-option {
        padding: 10px;
        min-height: 44px;
    }

    .wizard-btn {
        min-height: 44px;
        padding: 12px;
    }

    .avatar-chat-page {
        height: calc(100dvh - 56px - env(safe-area-inset-bottom, 0px));
    }
    @supports not (height: 100dvh) {
        .avatar-chat-page {
            height: calc(100vh - 56px - env(safe-area-inset-bottom, 0px));
        }
    }

    .avatar-chat-input-bar textarea {
        font-size: 16px; /* Prevent iOS zoom */
    }

    .avatar-chat-send {
        min-width: 44px;
        min-height: 44px;
    }

    .avatar-memory-page {
        padding: 12px;
        padding-top: calc(12px + var(--safe-top));
        padding-bottom: calc(72px + var(--safe-bottom));
    }

    .avatar-fact-row {
        padding: 12px;
        gap: 12px;
    }

    .avatar-fact-delete {
        min-width: 44px;
        min-height: 44px;
    }

    /* ── Settings tabs (critical — were overflowing on mobile) ── */
    .settings-tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    .settings-tabs::-webkit-scrollbar {
        display: none;
    }
    .settings-tab {
        min-height: 44px;
        white-space: nowrap;
        flex-shrink: 0;
    }

    /* ── Persona info button (the ? button) ── */
    .persona-info-btn {
        min-width: 28px;
        min-height: 28px;
        font-size: 12px;
    }

    /* ── Sidebar expand button (Ctrl+B desktop) hidden on mobile ── */
    .sidebar-expand-btn {
        display: none !important;
    }

    /* ── Font sizing: respect world config base size but prevent zooming too small on small viewports ── */
    body {
        font-size: clamp(14px, var(--font-size-base, 14px), 17px);
    }

    /* ── Tap highlight: suppress default blue flash on all interactive elements ── */
    a, button, [role="button"], .nav-item, .sidebar-item, .persona-card, .msg-action-btn {
        -webkit-tap-highlight-color: rgba(var(--green-rgb), 0.1);
    }

    /* Top sidebar on mobile — stays visible as top bar, no overlay */
    body[data-sidebar="top"] .sidebar {
        position: relative;
        transform: none;
        width: 100%;
        min-width: 100%;
        z-index: auto;
    }

    /* None sidebar on mobile — ensure hidden */
    body[data-sidebar="none"] .sidebar {
        display: none !important;
    }

    body[data-sidebar="none"] .sidebar-toggle {
        display: none !important;
    }
}


/* ═══ Small phones (480px) ═══ */

@media (max-width: 480px) {

    .persona-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pipboy-title {
        font-size: 16px;
    }

    .pipboy-tab {
        padding: 6px 10px;
        font-size: 11px;
    }

    .billing-balance-value {
        font-size: 32px;
    }

    .billing-plan-name {
        font-size: 14px;
    }

    .billing-plan-features li {
        font-size: 11px;
    }

    .settings-header,
    .billing-header {
        font-size: 16px;
    }

    .login-vault-art {
        font-size: 5px;
        line-height: 1.05;
    }

    .empty-prompts {
        max-width: 100%;
    }

    .empty-prompt-btn {
        font-size: 12px;
        padding: 10px 12px;
    }

    .avatar-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .avatar-card-img {
        width: 56px;
        height: 56px;
    }
}


/* ═══ Very small screens (380px) ═══ */

@media (max-width: 380px) {

    .bubble {
        padding: 10px 12px;
        font-size: 13px;
    }

    .chat-header {
        padding: 8px 10px;
        gap: 6px;
    }

    .chat-title {
        font-size: 12px;
    }

    .chat-model {
        font-size: 9px;
        max-width: 70px;
    }

    .chat-balance {
        font-size: 9px;
    }

    .chat-input-area {
        padding: 8px 10px;
    }

    .billing-topup-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .billing-topup-btn {
        font-size: 13px;
    }

    .login-vault-art {
        display: none;
    }

    .login-logo {
        font-size: 20px;
    }

    .login-panel {
        padding: 20px 12px;
    }

    .persona-card-icon {
        font-size: 20px;
    }

    .persona-card-name {
        font-size: 11px;
    }

    .nav-item {
        font-size: 10px;
    }

    .nav-item-icon {
        font-size: 18px;
    }
}

/* ── Context usage bar (chat header) ── */
.context-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--panel);
    border-bottom: 1px solid var(--line);
    font-size: 11px;
    color: var(--muted);
    cursor: pointer;
    transition: background 0.15s;
    user-select: none;
}

.context-bar:hover {
    background: rgba(var(--green-rgb), 0.04);
}

.context-bar-hidden {
    display: none;
}

.context-bar-label {
    color: var(--green-dim);
    font-weight: 600;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.context-bar-track {
    flex: 1;
    height: 6px;
    background: rgba(var(--green-rgb), 0.08);
    border: 1px solid var(--line);
    border-radius: 3px;
    overflow: hidden;
    min-width: 40px;
}

.context-bar-fill {
    height: 100%;
    width: 0%;
    background: var(--green);
    transition: width 0.3s ease, background 0.3s;
}

.context-bar-text {
    color: var(--muted);
    font-variant-numeric: tabular-nums;
    flex-shrink: 0;
    white-space: nowrap;
    min-width: 80px;
    text-align: right;
}

.context-bar.ctx-low .context-bar-fill { background: var(--green); }
.context-bar.ctx-low .context-bar-text { color: var(--green-dim); }

.context-bar.ctx-mid .context-bar-fill { background: var(--amber); }
.context-bar.ctx-mid .context-bar-text { color: var(--amber); }

.context-bar.ctx-high .context-bar-fill { background: var(--red); }
.context-bar.ctx-high .context-bar-text { color: var(--red); }

/* ── Compact modal ── */
.compact-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.65);
    z-index: 2500;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: overlayFadeIn 0.15s ease-out;
}

.compact-modal {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 20px;
    width: 100%;
    max-width: 480px;
    max-height: 85vh;
    overflow-y: auto;
    animation: pickerSlideIn 0.2s ease-out;
    color: var(--text);
}

.compact-modal-title {
    font-size: 15px;
    color: var(--green);
    margin-bottom: 16px;
    text-align: center;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.compact-modal-body {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.compact-loading,
.compact-error {
    text-align: center;
    padding: 24px;
    color: var(--muted);
    font-size: 13px;
}

.compact-error {
    color: var(--red);
}

.compact-section {
    border-top: 1px dashed var(--line);
    padding-top: 14px;
}

.compact-section:first-child {
    border-top: none;
    padding-top: 0;
}

.compact-section-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--green-dim);
    margin-bottom: 10px;
}

.compact-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 12px;
}

.stat-cell {
    background: rgba(var(--green-rgb), 0.04);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 8px 6px;
    text-align: center;
}

.stat-label {
    font-size: 10px;
    color: var(--muted);
    margin-bottom: 2px;
}

.stat-value {
    font-size: 14px;
    color: var(--green);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.compact-ctx-bar {
    background: transparent;
    border: none;
    padding: 8px 0 2px;
    cursor: default;
}

.compact-ctx-bar:hover {
    background: transparent;
}

.compact-model-hint {
    font-size: 11px;
    color: var(--muted);
    margin-top: 6px;
}

.compact-model-hint strong {
    color: var(--green-dim);
}

.compact-summary-meta {
    font-size: 12px;
    color: var(--muted);
    margin-bottom: 6px;
}

.compact-summary-details {
    font-size: 12px;
}

.compact-summary-details summary {
    cursor: pointer;
    color: var(--green-dim);
    padding: 4px 0;
}

.compact-summary-details summary:hover {
    color: var(--green);
}

.compact-summary-text {
    margin-top: 6px;
    padding: 10px;
    background: rgba(var(--green-rgb), 0.04);
    border: 1px solid var(--line);
    border-radius: 8px;
    max-height: 180px;
    overflow-y: auto;
    white-space: pre-wrap;
    color: var(--text);
    line-height: 1.5;
}

.compact-slider-row {
    display: grid;
    grid-template-columns: 140px 1fr 60px;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.compact-slider-row label {
    font-size: 12px;
    color: var(--muted);
}

.compact-slider-row input[type="range"] {
    width: 100%;
    accent-color: var(--green);
}

.compact-slider-row .slider-value {
    font-size: 12px;
    color: var(--green);
    font-variant-numeric: tabular-nums;
    text-align: right;
}

.compact-toggle-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text);
    margin-bottom: 10px;
    cursor: pointer;
}

.compact-toggle-row input[type="checkbox"] {
    accent-color: var(--green);
    width: 16px;
    height: 16px;
}

.compact-run-btn,
.compact-save-btn {
    width: 100%;
    margin-top: 4px;
}

.compact-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding-top: 4px;
}

@media (max-width: 560px) {
    .compact-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .compact-slider-row {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .compact-slider-row .slider-value {
        text-align: left;
    }
}