/* ===== Dialog Overlay ===== */
.dialog-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.dialog {
    background: var(--bg-dialog);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.dialog-fullscreen {
    width: 90vw;
    height: 90vh;
    max-width: none;
    max-height: none;
}

.dialog-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.dialog-header h2 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-header);
    white-space: nowrap;
}

.dialog-settings {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
}

.dialog-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 18px;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 3px;
    transition: background 0.15s;
    flex-shrink: 0;
}

.dialog-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.dialog-window-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 3px;
    transition: background 0.15s;
    flex-shrink: 0;
}

.dialog-window-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* ===== Compare Content ===== */
.compare-content {
    flex: 1;
    overflow: auto;
    padding: 0;
}

.compare-row {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 13px;
    line-height: 24px;
    min-width: fit-content;
}

.compare-row.unchanged {
    opacity: 0.5;
}

.compare-number {
    width: 40px;
    text-align: right;
    padding: 0 8px;
    color: var(--line-number-color);
    background: var(--line-number-bg);
    flex-shrink: 0;
    user-select: none;
}

.compare-old {
    flex: 1;
    padding: 0 8px;
    min-width: 0;
    white-space: pre;
    flex-shrink: 0;
}

.compare-arrow {
    padding: 0 8px;
    color: var(--text-secondary);
    flex-shrink: 0;
    user-select: none;
}

.compare-new {
    flex: 1;
    padding: 0 8px;
    min-width: 0;
    white-space: pre;
    flex-shrink: 0;
}

.compare-row.changed .compare-old {
    background: var(--diff-removed-bg);
}

.compare-row.changed .compare-new {
    background: var(--diff-added-bg);
}

/* ===== Dialog Footer ===== */
.dialog-footer {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

.compare-summary {
    flex: 1;
    font-size: 12px;
    color: var(--text-secondary);
}

/* ===== Welcome Modal ===== */
.welcome-dialog {
    width: 480px;
    max-width: 90vw;
    padding: 32px 36px;
    text-align: center;
}

.welcome-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-header);
    margin: 0 0 4px;
}

.welcome-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    margin: 0 0 20px;
}

.welcome-features {
    list-style: none;
    padding: 0;
    margin: 0 0 24px;
    text-align: left;
}

.welcome-features li {
    font-size: 13px;
    color: var(--text-primary);
    padding: 4px 0;
    line-height: 1.5;
}

.welcome-open-btn {
    font-size: 14px;
    padding: 8px 24px;
}

.welcome-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.welcome-hint {
    font-size: 11px;
    color: var(--text-secondary);
    margin: 14px 0 0;
    opacity: 0.7;
}