/* Native <dialog> modals: welcome and tutorial */
.modal-dialog {
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 10000;
    padding: 0;
    border: 1px solid var(--line-strong);
    border-radius: 16px;
    box-shadow: var(--shadow-raised);
    width: 440px;
    max-width: 90vw;
    max-height: 90vh;
    background: var(--surface);
    color: var(--text);
}

#tutorial-dialog {
    width: 640px;
}

.modal-dialog::backdrop,
.centered-dialog::backdrop {
    background-color: var(--backdrop);
}

.modal-dialog .dialog-content {
    position: relative;
    width: 100%;
    max-width: none;
    padding: 28px;
    border: 0;
    border-radius: 0;
    box-shadow: none;
}

.modal-dialog h2 {
    margin: 0 0 18px;
    font: 700 24px/1.1 var(--font-display);
    letter-spacing: 0.01em;
    text-transform: uppercase;
    text-align: left;
}

.welcome-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin-bottom: 8px;
}

.check-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    cursor: pointer;
}

.check-group input {
    width: 18px;
    height: 18px;
    margin: 2px 0 0;
    accent-color: var(--you);
}

.check-title {
    display: block;
    font-size: 14px;
    font-weight: 600;
}

.check-note {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
}

.input-group input[type="text"] {
    width: 100%;
    height: 44px;
    padding: 0 12px;
    border: 1px solid var(--line-strong);
    border-radius: 10px;
    background: var(--ground);
    color: var(--text);
    font: inherit;
    font-size: 16px;
}

.input-group input[type="text"]:focus {
    outline: 2px solid var(--you);
    outline-offset: 1px;
}


.modal-dialog .dialog-buttons {
    justify-content: stretch;
}

.modal-dialog .dialog-buttons .dialog-button {
    flex: 1;
    min-height: 48px;
}

.tutorial-footer {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
    text-align: center;
}

.tutorial-close {
    position: absolute;
    right: 14px;
    top: 14px;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: transparent;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--text-muted);
}

.tutorial-close:hover {
    color: var(--text);
    background: var(--surface-sunken);
}

/* Fallback when showModal() is unavailable */
.centered-dialog {
    position: fixed !important;
    left: 50% !important;
    top: 50% !important;
    transform: translate(-50%, -50%) !important;
    z-index: 10000 !important;
}