.ui-file-dropzone {
    width: 100%;
    position: relative;
}

.ui-file-dropzone__input {
    display: none;
}

.ui-file-dropzone__surface {
    border: 1px solid color-mix(in srgb, var(--primary-color) 20%, var(--text-muted));
    border-radius: var(--radius-lg);
    padding: clamp(1rem, 2vw, 1.35rem);
    background:
        radial-gradient(circle at top right, color-mix(in srgb, var(--primary-color) 9%, transparent), transparent 38%),
        linear-gradient(180deg, color-mix(in srgb, var(--background-alt) 96%, white), var(--background-alt));
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    cursor: pointer;
}

.ui-file-dropzone__surface:hover,
.ui-file-dropzone__surface:focus-visible,
.ui-file-dropzone.is-dragover .ui-file-dropzone__surface {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary-color) 12%, transparent);
    outline: none;
}

.ui-file-dropzone.is-dragover .ui-file-dropzone__surface {
    transform: translateY(-1px);
}

/* Bloccata: il PDF arriva da un'altra sorgente (Slide Studio). La card resta
   leggibile ma non invita piu' al caricamento finche' non si sblocca. */
.ui-file-dropzone.is-locked .ui-file-dropzone__surface {
    cursor: default;
    border-style: dashed;
    border-color: color-mix(in srgb, var(--success) 45%, var(--text-muted));
    background: linear-gradient(180deg, color-mix(in srgb, var(--success) 8%, var(--background-alt)), var(--background-alt));
}

.ui-file-dropzone.is-locked .ui-file-dropzone__surface:hover,
.ui-file-dropzone.is-locked .ui-file-dropzone__surface:focus-visible {
    border-color: color-mix(in srgb, var(--success) 45%, var(--text-muted));
    box-shadow: none;
    transform: none;
}

.ui-file-dropzone.is-locked .ui-file-dropzone__icon-shell,
.ui-file-dropzone.is-locked .ui-file-dropzone__state-label {
    color: var(--success);
}

/* Velo di blocco: copre la card e lascia solo le due uscite (continua nello
   Studio / sblocca). Fuori dallo stato bloccato non esiste. */
.ui-file-dropzone__lock {
    display: none;
}

.ui-file-dropzone.is-locked .ui-file-dropzone__lock {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(0.75rem, 2vw, 1.25rem);
    border-radius: var(--radius-lg);
    background: color-mix(in srgb, var(--background-alt) 82%, transparent);
    backdrop-filter: blur(2px);
    z-index: 2;
}

.ui-file-dropzone__lock-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    max-width: 34ch;
    text-align: center;
}

.ui-file-dropzone__lock-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: color-mix(in srgb, var(--success) 16%, var(--background-alt));
    color: var(--success);
}

.ui-file-dropzone__lock-title {
    font-size: 0.95rem;
    color: var(--text-primary);
    line-height: 1.35;
}

.ui-file-dropzone__lock-message {
    margin: 0;
    font-size: 0.8rem;
    line-height: 1.45;
    color: color-mix(in srgb, var(--text-primary) 72%, var(--text-muted));
}

.ui-file-dropzone__lock-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 0.3rem;
}

.ui-file-dropzone__lock-actions .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    white-space: nowrap;
}

.ui-file-dropzone__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.9rem;
}

.ui-file-dropzone__copy {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    min-width: 0;
}

.ui-file-dropzone__eyebrow {
    margin: 0;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--primary-color);
}

.ui-file-dropzone__title {
    margin: 0;
    font-size: clamp(1rem, 1.4vw, 1.15rem);
    color: var(--text-primary);
}

.ui-file-dropzone__description {
    margin: 0;
    color: color-mix(in srgb, var(--text-primary) 76%, var(--text-muted));
    line-height: 1.55;
}

.ui-file-dropzone__body {
    min-height: 10.5rem;
    border: 2px dashed color-mix(in srgb, var(--primary-color) 26%, var(--text-muted));
    border-radius: var(--radius-md);
    background: color-mix(in srgb, var(--background-alt) 96%, white);
    padding: clamp(1rem, 2vw, 1.2rem);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.ui-file-dropzone__icon-shell {
    width: 4.25rem;
    height: 4.25rem;
    border-radius: 1.2rem;
    flex-shrink: 0;
    display: grid;
    place-items: center;
    color: var(--primary-color);
    background: color-mix(in srgb, var(--primary-color) 10%, white);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--primary-color) 14%, transparent);
}

.ui-file-dropzone__state {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0;
}

.ui-file-dropzone__state-label {
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--primary-color);
}

.ui-file-dropzone__filename {
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.45;
    word-break: break-word;
}

.ui-file-dropzone__meta {
    color: var(--text-muted);
    font-size: 0.84rem;
    line-height: 1.45;
}

.ui-file-dropzone__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.ui-file-dropzone__error {
    margin: 0;
    padding: 0.8rem 0.9rem;
    border-radius: var(--radius-md);
    color: var(--danger);
    background: color-mix(in srgb, var(--danger) 10%, white);
    border: 1px solid color-mix(in srgb, var(--danger) 18%, transparent);
}

.ui-file-dropzone__file-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.ui-file-dropzone__file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.9rem;
    padding: 0.8rem 0.9rem;
    border-radius: var(--radius-md);
    background: color-mix(in srgb, var(--background-alt) 98%, white);
    border: 1px solid color-mix(in srgb, var(--primary-color) 10%, var(--text-muted));
}

.ui-file-dropzone__file-copy {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.ui-file-dropzone__file-name {
    color: var(--text-primary);
    font-size: 0.94rem;
    line-height: 1.4;
    word-break: break-word;
}

.ui-file-dropzone__file-meta {
    color: var(--text-muted);
    font-size: 0.8rem;
    line-height: 1.4;
}

.ui-file-dropzone__file-action {
    flex-shrink: 0;
}

.ui-file-dropzone.is-error .ui-file-dropzone__surface {
    border-color: var(--danger);
}

.ui-file-dropzone.is-error .ui-file-dropzone__body {
    border-color: color-mix(in srgb, var(--danger) 55%, var(--text-muted));
}

.ui-file-dropzone.is-has-file .ui-file-dropzone__icon-shell {
    color: var(--success);
    background: color-mix(in srgb, var(--success) 10%, white);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--success) 16%, transparent);
}

@media (max-width: 768px) {
    .ui-file-dropzone__header {
        flex-direction: column;
    }
}

@media (max-width: 640px) {
    .ui-file-dropzone__surface {
        padding: 0.95rem;
    }

    .ui-file-dropzone__body {
        min-height: 0;
        flex-direction: column;
        align-items: flex-start;
    }

    .ui-file-dropzone__icon-shell {
        width: 3.6rem;
        height: 3.6rem;
        border-radius: 1rem;
    }

    .ui-file-dropzone__actions {
        width: 100%;
    }

    .ui-file-dropzone__actions .btn {
        width: 100%;
    }

    .ui-file-dropzone__file-item {
        align-items: flex-start;
        flex-direction: column;
    }

    .ui-file-dropzone__file-action {
        width: 100%;
    }
}