/* ============================================================
   SPIN ANIMATION SYSTEM
   ============================================================ */
@keyframes spin {
    from { transform: rotate(360deg); }
    to   { transform: rotate(0deg); }
}
.spinning,
.action-list-item .spinner,
.enhance-btn.loading .material-symbols-rounded,
.signin-spinner,
[data-spinner],
.material-symbols-rounded.spinning {
    animation: spin 0.75s linear infinite !important;
    will-change: transform;
    transform-origin: 50% 50%;
    transform-box: fill-box;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

/* ============================================================
   TOP FLOATING TOAST SYSTEM
   ============================================================ */
.toast-container {
    position: fixed !important;
    top: 24px !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    z-index: var(--z-toast) !important;
    width: calc(100% - 32px);
    max-width: 480px;
    pointer-events: none !important;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
}
.toast {
    pointer-events: auto !important;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    width: auto;
    max-width: 100%;
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 13px;
    font-weight: 500;
    line-height: 1.4;
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(255, 255, 255, 0.08) inset;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transform: translateY(-20px);
    opacity: 0;
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
    white-space: nowrap;
}
.toast.toast-show { transform: translateY(0); opacity: 1; }
.toast-icon { font-size: 20px; flex-shrink: 0; }
.toast-message { flex: 1; word-break: break-word; }
.toast-close {
    background: transparent;
    border: none;
    color: inherit;
    opacity: 0.6;
    cursor: pointer;
    font-size: 18px;
    padding: 4px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: opacity 0.15s;
}
.toast-close:hover { opacity: 1; }

.toast.error   { background: rgba(24, 10, 12, 0.92); border: 1px solid rgba(239, 68, 68, 0.35); color: #fca5a5; }
.toast.error   .toast-icon { color: #ef4444; }
.toast.success { background: rgba(8, 24, 16, 0.92);  border: 1px solid rgba(16, 185, 129, 0.35); color: #86efac; }
.toast.success .toast-icon { color: #10b981; }
.toast.info    { background: rgba(10, 18, 30, 0.92); border: 1px solid rgba(59, 130, 246, 0.35); color: #93c5fd; }
.toast.info    .toast-icon { color: #3b82f6; }

/* ============================================================
   MOBILE KEYBOARD & VIEWPORT ISOLATION — canonical block
   ============================================================ */
@media (max-width: 768px) {
    :root { --sidebar-width: 85%; }

    body {
        height: 100dvh;
        min-height: 100dvh;
        overflow: hidden;
    }

    .main-wrapper {
        height: 100dvh;
        position: relative;
        overflow: hidden;
    }

    #sidebar-container-node.open {
        left: 0;
        box-shadow: 10px 0 30px var(--shadow-color);
    }

    #viewport {
        padding: 80px 15px 140px 15px !important;
        height: 100dvh;
    }

    .swipe-handle {
        position: absolute;
        top: 0;
        left: 0;
        width: 20px;
        height: 100%;
        background: transparent;
        z-index: var(--z-sidebar-trigger);
        cursor: ew-resize;
    }

    .workspace-header { padding-left: 40px !important; }
    .brand-logo { font-size: 16px; }
    .chat-bubble { max-width: 95% !important; padding: 12px 14px !important; }

    .hero-text {
        margin-top: 10vh !important;
        padding: 0 16px !important;
        transition: transform 0.2s ease-out;
    }
    .hero-text h1 { font-size: 24px !important; }
    .hero-text p  { font-size: 13px !important; }

    .command-wrapper {
        position: fixed !important;
        bottom: 0 !important;
        left: 0 !important;
        right: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        transform: none !important;
        padding: 8px 14px calc(env(safe-area-inset-bottom, 10px) + 8px) 14px !important;
        background: linear-gradient(to top, var(--bg-deep) 80%, transparent) !important;
        z-index: var(--z-command-bar) !important;
        max-height: 90vh !important;
        overflow-y: auto !important;
        transition: bottom 0.15s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .input-row {
        flex-wrap: nowrap !important;
        align-items: flex-end !important;
        gap: 6px !important;
    }

    textarea {
        font-size: 16px !important;
        padding: 6px 4px !important;
        max-height: 35vh !important;
        margin-bottom: 0 !important;
    }

    .action-btn { width: 36px !important; height: 36px !important; }

    .input-frame:not(.has-text) #send-trigger:not(.btn-stop-active) { display: none !important; }
    .input-frame.has-text #mic-trigger { display: none !important; }
    .input-frame:has(#send-trigger.btn-stop-active) #mic-trigger { display: none !important; }

    #model-dropdown-card {
        right: 10px;
        left: 10px;
        width: auto;
        max-width: 100%;
    }

    .sidebar-footer {
        margin-top: auto;
        flex-shrink: 0;
        padding: 10px 15px;
        min-height: 70px;
    }
    .sidebar-footer .footer-opt { font-size: 12px; padding: 8px; }
    .sidebar-footer .sidebar-sub-box { padding: 8px; }

    .axelr-pricing-container > div {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .tier-card { padding: 24px 18px; }
    .tier-card h3 { font-size: 20px; padding-right: 80px; }
    .tier-card .price-output { font-size: 30px; margin-bottom: 18px; }
    .tier-card .options-group label { padding: 12px; }
    .tier-card .options-group label .opt-content .opt-row .opt-name { font-size: 13px; }
    .tier-card .options-group label .opt-content .opt-row .opt-price { font-size: 13px; }
    .tier-card .options-group label .opt-content .opt-desc { font-size: 11px; }
    .tier-card .tier-badge-pos { top: 14px; right: 14px; font-size: 9px; padding: 3px 8px; }

    #search-overlay { padding: 60px 20px 20px 20px; }
    #search-overlay .search-input-box { font-size: 18px; }

    .workspace-card { padding: 24px 16px; }
    .ws-grid { grid-template-columns: 1fr; gap: 16px; }
}

@media (max-width: 480px) {
    .tier-card { padding: 18px 14px; }
    .tier-card h3 { font-size: 18px; padding-right: 70px; }
    .tier-card .price-output { font-size: 26px; margin-bottom: 14px; }
    .tier-card .options-group label { padding: 10px; }
    .tier-card .options-group label .opt-content .opt-row .opt-name { font-size: 12px; }
    .tier-card .options-group label .opt-content .opt-row .opt-price { font-size: 12px; }
    .tier-card .options-group label .opt-content .opt-desc { font-size: 10px; }
    .tier-card .tier-badge-pos { top: 12px; right: 12px; font-size: 8px; padding: 2px 6px; }

    #search-overlay { padding: 60px 20px 20px 20px; }
    #search-overlay .search-input-box { font-size: 18px; }

    .command-wrapper {
        padding-left: 38px !important;
        padding-right: 10px !important;
        padding-bottom: 15px !important;
    }
    .input-frame { padding: 6px 8px !important; }
    .action-btn { width: 32px !important; height: 32px !important; }
    .hero-text h1 { font-size: 20px !important; }
    .hero-text p  { font-size: 11px !important; }
    .workspace-header { padding-left: 35px !important; }

    .theme-option { font-size: 10px; padding: 4px 6px; }

    .auth-providers { grid-template-columns: 1fr; }
    .auth-brand { font-size: 22px; }
    .auth-card { padding: 32px 22px 26px; border-radius: 20px; }
    .auth-brand span { font-size: 26px; }
    .auth-tagline { font-size: 14px; }
    .auth-logo span { font-size: 24px; }
    .auth-provider-btn { font-size: 12px; padding: 10px 6px; }
    .auth-tagline { font-size: 16px; }
    .auth-sub { font-size: 13px; }

    .workspace-header { padding-left: 40px; padding-right: 12px; }
    .ws-btn { padding: 5px 8px; font-size: 11px; }
    .header-left #model-selector { font-size: 12px; padding: 5px 8px; }
    .header-left #model-selector #model-text-display {
        max-width: 90px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    #admin-metrics-container .profile-stat-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
    #admin-metrics-container .profile-stat-row .profile-stat-value {
        text-align: left;
    }

    .ws-grid {
        flex-direction: column;
        align-items: center;
    }
    .workspace-card {
        max-width: 100%;
        width: 100%;
        padding: 20px 16px;
    }
    .ws-title { font-size: 20px; }
    .ws-desc  { font-size: 13px; }
}

@media (max-width: 320px) {
    body {
        overflow-x: hidden;
        min-width: 280px;
    }

    .user-bubble,
    .nexus-bubble { padding: 12px 14px !important; }

    .modal-card {
        width: calc(100% - 16px) !important;
        max-width: 260px !important;
        padding: 16px !important;
        margin: 8px auto !important;
    }

    #workspace-selector { padding: 16px !important; }

    .command-wrapper {
        padding-left: 36px !important;
        padding-right: 8px !important;
    }

    .hero-text h1 { font-size: 18px !important; }
    .hero-text p  { font-size: 10px !important; }

    #sidebar-container-node { width: 90% !important; }

    .actions-dropdown-list,
    #model-dropdown-card,
    #account-dropdown-card {
        width: calc(100% - 16px) !important;
        min-width: 220px !important;
        right: 8px !important;
        left: 8px !important;
    }

    .toast-container {
        width: calc(100% - 16px) !important;
        max-width: 260px !important;
    }

    .auth-card { padding: 24px 16px; }
    .auth-logo span { font-size: 18px; }
    .workspace-card { flex: 1 1 100%; max-width: 100%; padding: 16px; }
    .ws-title { font-size: 16px; }
    .ws-desc  { font-size: 12px; }
    .command-wrapper { padding: 0 8px; }
    .input-frame { padding: 8px; }
}

/* ============================================================
   ADDITIONAL RESPONSIVE POLISH
   ============================================================ */
@media (max-width: 900px) {
    .ws-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 700px) {
    .ws-grid {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 12px;
    }
    .workspace-card {
        padding: 16px;
        min-height: 0;
    }
    .workspace-card .ws-card-icon { height: 32px; }
    .workspace-card .ws-card-icon svg,
    .workspace-card .ws-card-icon .material-symbols-rounded {
        width: 32px; height: 32px; font-size: 32px;
    }
    .ws-title { font-size: 16px; }
    .ws-desc { font-size: 12px; line-height: 1.4; }
    .ws-features { gap: 4px; }
    .ws-feature-badge { font-size: 10px; padding: 2px 6px; }
}

@media (max-width: 680px) {
    .ws-grid { grid-template-columns: 1fr; max-width: 440px; }
    .workspace-card {
        min-height: 0;
        display: grid;
        grid-template-columns: 44px 1fr auto;
        align-items: center;
        text-align: left;
    }
    .workspace-card .ws-card-icon { grid-row: 1 / span 2; }
    .workspace-card .ws-card-content { min-width: 0; }
    .workspace-card .ws-desc { margin-bottom: 4px; }
    .workspace-card .ws-card-arrow { grid-column: 3; grid-row: 1; }
}

@media (max-width: 640px) {
    .command-wrapper {
        padding: 6px 12px calc(env(safe-area-inset-bottom, 8px) + 6px) 12px !important;
    }
    textarea#prompt-input { font-size: 16px; }
    .action-btn { width: 34px !important; height: 34px !important; }
}

@media (max-width: 600px) {
    .ws-grid {
        grid-template-columns: 1fr;
        max-width: 460px;
        gap: 14px;
    }
    .workspace-card { min-height: 0; padding: 18px; }
    .workspace-card .ws-card-icon,
    .workspace-card .ws-card-icon svg,
    .workspace-card .ws-card-icon .material-symbols-rounded {
        width: 32px; height: 32px; font-size: 32px;
    }
    .workspace-card .ws-title { font-size: 16px; }
    .workspace-card .ws-desc  { font-size: 12px; }

    .tier-modal-card {
        height: 100dvh !important;
        border-radius: 0 !important;
        padding: 12px !important;
    }
    .tier-grid { grid-template-columns: 1fr; gap: 10px; }
    .tier-card-modern { padding: 14px 12px; }
    .tier-amount { font-size: 26px !important; }
}

@media (max-width: 360px) {
    .command-wrapper {
        padding-left: 34px !important;
        padding-right: 8px !important;
        width: calc(100% - 12px);
    }
    .workspace-card  { padding: 14px !important; }
    .workspace-card .ws-desc { font-size: 11px; }
    .tier-cta-btn,
    .modal-submit-btn { font-size: 12px !important; padding: 10px !important; }
    .auth-card { padding: 28px 18px 22px; }
    .input-frame { padding: 6px; }
    .input-actions { gap: 0; }
    .action-btn { width: 31px; height: 31px; flex-basis: 31px; }
    .knowledge-form { grid-template-columns: 1fr; }
    .knowledge-form .modal-submit-btn { width: 100%; }
}