.valid.modified:not([type=checkbox]) {
    outline: 1px solid #26b050;
}

.invalid {
    outline: 1px solid red;
}

.validation-message {
    color: red;
}

#blazor-error-ui {
    color-scheme: light only;
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    box-sizing: border-box;
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

    #blazor-error-ui .dismiss {
        cursor: pointer;
        position: absolute;
        right: 0.75rem;
        top: 0.5rem;
    }

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

.loading-progress {
    position: absolute;
    display: block;
    width: 8rem;
    height: 8rem;
    inset: 20vh 0 auto 0;
    margin: 0 auto 0 auto;
}

    .loading-progress circle {
        fill: none;
        stroke: #e0e0e0;
        stroke-width: 0.6rem;
        transform-origin: 50% 50%;
        transform: rotate(-90deg);
    }

        .loading-progress circle:last-child {
            stroke: #1b6ec2;
            stroke-dasharray: calc(3.141 * var(--blazor-load-percentage, 0%) * 0.8), 500%;
            transition: stroke-dasharray 0.05s ease-in-out;
        }

.loading-progress-text {
    position: absolute;
    text-align: center;
    font-weight: bold;
    inset: calc(20vh + 3.25rem) 0 auto 0.2rem;
}

    .loading-progress-text:after {
        content: var(--blazor-load-percentage-text, "Loading");
    }

code {
    color: #c02d76;
}

/* ============================================================
   PREMIUM AI CHAT
   Design system basato su variabili MudBlazor → light + dark.
   ============================================================ */

.chat-root {
    /* token locali derivati dalla palette MudBlazor */
    --chat-radius: 18px;
    --chat-radius-sm: 12px;
    --chat-bubble-radius: 20px;
    --chat-gradient: linear-gradient(135deg, var(--mud-palette-primary) 0%, var(--mud-palette-secondary) 100%);
    --chat-border: var(--mud-palette-lines-default, var(--mud-palette-divider));
    --chat-soft: rgba(var(--mud-palette-primary-rgb), 0.08);
    --chat-soft-2: rgba(var(--mud-palette-action-default-rgb), 0.06);
    --chat-shadow-sm: 0 1px 2px rgba(15, 23, 42, .05), 0 1px 3px rgba(15, 23, 42, .04);
    --chat-shadow-md: 0 4px 14px -6px rgba(15, 23, 42, .18), 0 1px 3px rgba(15, 23, 42, .06);
    --chat-shadow-lg: 0 18px 48px -22px rgba(15, 23, 42, .35);
    position: relative;
    overflow: hidden;
    border-radius: var(--chat-radius);
    background: var(--mud-palette-surface);
}

/* Container altezza pagina chat - usa dvh per gestire virtual keyboard mobile */
.chat-page-container {
    height: calc(100dvh - 168px);
    min-height: 440px;
}

@media (max-width: 599px) {
    .chat-page-container {
        height: calc(100dvh - 116px);
        min-height: 320px;
    }
}

/* ===== Shell: sidebar + area chat ===== */

.chat-shell {
    display: flex;
    height: 100%;
    overflow: hidden;
}

.chat-sidebar {
    width: 272px;
    min-width: 272px;
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--mud-palette-surface);
    border-right: 1px solid var(--chat-border);
}

.chat-main {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background:
        radial-gradient(1200px 420px at 85% -10%, var(--chat-soft), transparent 60%),
        var(--mud-palette-background);
}

/* ===== Header ===== */

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    min-height: 60px;
    padding: 10px 14px;
    flex-shrink: 0;
    border-bottom: 1px solid var(--chat-border);
    background: rgba(var(--mud-palette-surface-rgb, 255, 255, 255), 0.72);
    backdrop-filter: saturate(160%) blur(12px);
    -webkit-backdrop-filter: saturate(160%) blur(12px);
    z-index: 5;
}

.chat-header-title {
    font-weight: 600;
    font-size: 0.98rem;
    line-height: 1.15;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 46vw;
}

/* Avatar AI a gradiente — firma visiva premium */
.chat-ai-avatar {
    width: 34px;
    height: 34px;
    border-radius: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    flex-shrink: 0;
    background: var(--chat-gradient);
    box-shadow: 0 4px 12px -4px rgba(var(--mud-palette-primary-rgb), 0.55);
}

    .chat-ai-avatar .mud-icon-root {
        font-size: 1.2rem;
    }

.chat-ai-avatar--sm {
    width: 28px;
    height: 28px;
    border-radius: 9px;
}

    .chat-ai-avatar--sm .mud-icon-root {
        font-size: 1rem;
    }

/* ===== Thread (area messaggi) ===== */

.chat-thread {
    flex: 1;
    min-height: 0;
    position: relative;
    overflow: hidden;
}

.chat-thread-scroll {
    height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
    scroll-behavior: smooth;
    padding: 18px clamp(12px, 4vw, 40px);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

/* scrollbar discreta */
.chat-thread-scroll::-webkit-scrollbar,
.chat-sidebar-list::-webkit-scrollbar {
    width: 9px;
}

.chat-thread-scroll::-webkit-scrollbar-thumb,
.chat-sidebar-list::-webkit-scrollbar-thumb {
    background: rgba(var(--mud-palette-action-default-rgb), 0.18);
    border-radius: 99px;
    border: 3px solid transparent;
    background-clip: padding-box;
}

    .chat-thread-scroll::-webkit-scrollbar-thumb:hover,
    .chat-sidebar-list::-webkit-scrollbar-thumb:hover {
        background: rgba(var(--mud-palette-action-default-rgb), 0.32);
        background-clip: padding-box;
    }

/* ===== Bolle messaggi ===== */

.chat-row {
    display: flex;
    gap: 10px;
    width: 100%;
    margin-bottom: 14px;
    align-items: flex-start;
}

.chat-row--user {
    justify-content: flex-end;
}

.chat-bubble-user {
    max-width: min(86%, 640px);
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.chat-bubble-assistant {
    max-width: min(94%, 760px);
    display: flex;
    flex-direction: column;
    min-width: 0;
}

@media (min-width: 600px) {
    .chat-bubble-user {
        max-width: min(72%, 640px);
    }

    .chat-bubble-assistant {
        max-width: min(86%, 760px);
        flex: 1;
    }
}

.chat-paper-user {
    background: var(--chat-gradient);
    color: #fff;
    border-radius: var(--chat-bubble-radius) var(--chat-bubble-radius) 6px var(--chat-bubble-radius);
    padding: 11px 15px;
    box-shadow: 0 6px 18px -10px rgba(var(--mud-palette-primary-rgb), 0.6);
}

    .chat-paper-user .chat-user-text {
        white-space: pre-wrap;
        word-break: break-word;
        color: #fff;
        font-size: 0.95rem;
        line-height: 1.5;
    }

.chat-paper-assistant {
    background: var(--mud-palette-surface);
    border: 1px solid var(--chat-border);
    border-radius: 6px var(--chat-bubble-radius) var(--chat-bubble-radius) var(--chat-bubble-radius);
    padding: 12px 16px;
    box-shadow: var(--chat-shadow-sm);
}

.chat-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 5px;
    font-size: 0.7rem;
    color: var(--mud-palette-text-secondary);
    opacity: 0.85;
}

/* Avatar nascosti su mobile per guadagnare larghezza */
.chat-avatar-mobile-hide {
    display: none !important;
}

@media (min-width: 600px) {
    .chat-avatar-mobile-hide {
        display: flex !important;
    }
}

/* ===== Lista conversazioni (full-screen su mobile) ===== */

.chat-mobile-list-screen {
    position: absolute;
    inset: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    background: var(--mud-palette-surface);
    border-radius: var(--chat-radius);
    overflow: hidden;
    animation: chatSlideIn 0.24s cubic-bezier(.22, 1, .36, 1) both;
}

.chat-sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px 10px;
    flex-shrink: 0;
}

.chat-sidebar-list {
    flex: 1;
    overflow-y: auto;
    padding: 4px 10px 12px;
}

/* item conversazione */
.chat-conv-item {
    position: relative;
    cursor: pointer;
    border-radius: var(--chat-radius-sm);
    padding: 10px 12px 10px 14px;
    margin-bottom: 4px;
    border: 1px solid transparent;
    transition: background .15s ease, border-color .15s ease, transform .12s ease;
}

    .chat-conv-item:hover {
        background: var(--chat-soft-2);
    }

    .chat-conv-item::before {
        content: "";
        position: absolute;
        left: 4px;
        top: 50%;
        transform: translateY(-50%) scaleY(0);
        width: 3px;
        height: 56%;
        border-radius: 99px;
        background: var(--chat-gradient);
        transition: transform .18s cubic-bezier(.22, 1, .36, 1);
    }

.chat-conv-item--active {
    background: var(--chat-soft);
    border-color: rgba(var(--mud-palette-primary-rgb), 0.22);
}

    .chat-conv-item--active::before {
        transform: translateY(-50%) scaleY(1);
    }

.chat-conv-title {
    font-weight: 500;
    font-size: 0.86rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chat-conv-preview {
    font-size: 0.76rem;
    color: var(--mud-palette-text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-top: 2px;
}

.chat-conv-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 4px;
    font-size: 0.68rem;
    color: var(--mud-palette-text-secondary);
}

/* ===== Composer (input) ===== */

.chat-composer {
    flex-shrink: 0;
    padding: 8px clamp(10px, 3vw, 24px) 14px;
}

.chat-composer-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

/* pill auto-approve */
.chat-autopill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    border: 1px solid var(--chat-border);
    background: transparent;
    color: var(--mud-palette-text-secondary);
    font: inherit;
    font-size: 0.76rem;
    font-weight: 600;
    padding: 5px 11px;
    border-radius: 99px;
    cursor: pointer;
    transition: all .18s ease;
}

    .chat-autopill .mud-icon-root {
        font-size: 1rem;
    }

    .chat-autopill:hover {
        border-color: var(--mud-palette-warning);
        color: var(--mud-palette-warning);
    }

.chat-autopill--on {
    background: rgba(var(--mud-palette-warning-rgb), 0.14);
    border-color: rgba(var(--mud-palette-warning-rgb), 0.5);
    color: var(--mud-palette-warning);
}

/* campo input pill */
.chat-input-shell {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    padding: 6px 6px 6px 16px;
    border-radius: 24px;
    background: var(--mud-palette-surface);
    border: 1.5px solid var(--chat-border);
    box-shadow: var(--chat-shadow-md);
    transition: border-color .18s ease, box-shadow .18s ease;
}

    .chat-input-shell:focus-within {
        border-color: rgba(var(--mud-palette-primary-rgb), 0.55);
        box-shadow: 0 0 0 4px rgba(var(--mud-palette-primary-rgb), 0.12), var(--chat-shadow-md);
    }

.chat-input-field {
    flex: 1;
    min-width: 0;
}

    /* reset look MudTextField dentro la pill */
    .chat-input-field .mud-input.mud-input-text {
        margin-top: 0;
    }

    .chat-input-field .mud-input-slot {
        padding: 8px 0 !important;
        font-size: 0.95rem !important;
        line-height: 1.45 !important;
    }

/* bottone invio circolare a gradiente */
.chat-send-btn.mud-button-root {
    min-width: 44px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    flex-shrink: 0;
    background: var(--chat-gradient);
    color: #fff;
    box-shadow: 0 6px 16px -6px rgba(var(--mud-palette-primary-rgb), 0.6);
    transition: transform .15s ease, opacity .15s ease, filter .15s ease;
}

    .chat-send-btn.mud-button-root:hover:not(:disabled) {
        transform: translateY(-1px) scale(1.04);
        filter: brightness(1.05);
    }

    .chat-send-btn.mud-button-root:disabled {
        background: var(--mud-palette-action-disabled-background);
        color: var(--mud-palette-action-disabled);
        box-shadow: none;
    }

.chat-input-hint {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 12px 0;
    font-size: 0.7rem;
    color: var(--mud-palette-text-secondary);
    opacity: 0.7;
}

/* ===== Welcome / empty state ===== */

.chat-welcome {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 14px;
    padding: 24px;
    animation: chatMessageFadeIn .3s ease-out both;
}

.chat-welcome-orb {
    width: 76px;
    height: 76px;
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: var(--chat-gradient);
    box-shadow: var(--chat-shadow-lg);
    animation: chatFloat 5s ease-in-out infinite;
}

    .chat-welcome-orb .mud-icon-root {
        font-size: 2.2rem;
    }

.chat-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    max-width: 540px;
    margin-top: 4px;
}

.chat-suggestion {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    text-align: left;
    border: 1px solid var(--chat-border);
    background: var(--mud-palette-surface);
    color: var(--mud-palette-text-primary);
    border-radius: 14px;
    padding: 11px 15px;
    font: inherit;
    font-size: 0.82rem;
    cursor: pointer;
    box-shadow: var(--chat-shadow-sm);
    transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}

    .chat-suggestion .mud-icon-root {
        font-size: 1.05rem;
        color: var(--mud-palette-primary);
    }

    .chat-suggestion:hover {
        transform: translateY(-2px);
        border-color: rgba(var(--mud-palette-primary-rgb), 0.4);
        box-shadow: var(--chat-shadow-md);
    }

/* ===== Indicatore "sta scrivendo" ===== */

.chat-typing {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

    .chat-typing span {
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background: var(--mud-palette-text-secondary);
        opacity: 0.5;
        animation: chatTyping 1.3s infinite ease-in-out;
    }

    .chat-typing span:nth-child(2) {
        animation-delay: 0.18s;
    }

    .chat-typing span:nth-child(3) {
        animation-delay: 0.36s;
    }

@keyframes chatTyping {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.4;
    }

    30% {
        transform: translateY(-4px);
        opacity: 1;
    }
}

/* ===== Animazioni ===== */

@keyframes chatMessageFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes chatSlideIn {
    from {
        opacity: 0;
        transform: translateX(-12px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes chatFloat {
    0%, 100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-8px);
    }
}

.chat-message-enter {
    animation: chatMessageFadeIn 0.24s cubic-bezier(.22, 1, .36, 1) both;
}

@media (prefers-reduced-motion: reduce) {
    .chat-message-enter,
    .chat-mobile-list-screen,
    .chat-welcome,
    .chat-welcome-orb,
    .chat-typing span {
        animation: none !important;
    }
}

/* ===== Markdown ===== */

.chat-md-content {
    font-size: 0.95rem;
    line-height: 1.65;
    word-break: break-word;
}

.chat-md-line {
    display: inline;
}

.chat-md-h2 {
    display: block;
    font-size: 1.15em;
    font-weight: 700;
    margin: 0.9em 0 0.3em;
    line-height: 1.3;
}

.chat-md-h3 {
    display: block;
    font-size: 1.05em;
    font-weight: 700;
    margin: 0.7em 0 0.25em;
    line-height: 1.3;
}

.chat-md-h4 {
    display: block;
    font-size: 1em;
    font-weight: 600;
    margin: 0.5em 0 0.2em;
    line-height: 1.3;
}

.chat-md-list {
    margin: 0.35em 0 0.5em 1.4em;
    padding: 0;
}

    .chat-md-list li {
        margin-bottom: 0.25em;
        line-height: 1.55;
    }

code.chat-code-inline {
    background: var(--mud-palette-background-grey);
    padding: 0.12em 0.4em;
    border-radius: 4px;
    font-size: 0.875em;
    font-family: "JetBrains Mono", "Cascadia Code", "Consolas", monospace;
    color: var(--mud-palette-text-primary);
    border: 1px solid var(--mud-palette-divider);
}

pre.chat-code-block {
    background: #1e1e2e;
    color: #cdd6f4;
    padding: 1em 1.2em;
    border-radius: 12px;
    overflow-x: auto;
    margin: 0.6em 0;
    font-size: 0.84em;
    font-family: "JetBrains Mono", "Cascadia Code", "Consolas", monospace;
    line-height: 1.6;
    border: 1px solid rgba(255,255,255,0.06);
}

    pre.chat-code-block code {
        font-size: inherit;
        background: none;
        border: none;
        padding: 0;
        color: inherit;
    }

.chat-md-link {
    color: var(--mud-palette-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

    .chat-md-link:hover {
        opacity: 0.8;
    }

/* ===== Copy button ===== */

.chat-bubble-assistant-wrapper {
    position: relative;
}

.chat-copy-btn {
    position: absolute;
    top: 6px;
    right: 6px;
    opacity: 0;
    transition: opacity 0.15s ease;
    z-index: 1;
}

.chat-bubble-assistant-wrapper:hover .chat-copy-btn {
    opacity: 1;
}

/* ===== Scroll-to-bottom floating button ===== */

.chat-scroll-bottom-btn {
    position: absolute;
    bottom: 14px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    animation: chatMessageFadeIn 0.18s ease-out both;
}

    .chat-scroll-bottom-btn .mud-fab {
        box-shadow: var(--chat-shadow-lg);
        min-width: 38px !important;
        width: 38px !important;
        height: 38px !important;
    }

/* ===== Form floating placeholder ===== */

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}