:root {
    --app-bg: #f2efe8;
    --panel-bg: #ffffff;
    --accent: #1f2a30;
    --accent-light: #2f3e46;
    --border-color: #d6d1c5;
    --highlight: #e7efe7;
}

html,
body,
#app {
    height: 100%;
}

body {
    margin: 0;
    font-family: "Segoe UI", "Trebuchet MS", sans-serif;
    background: var(--app-bg);
    color: #1f2428;
    overflow: hidden;
}

.app-root {
    height: 100%;
}

.app-shell {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    color: #f7f5f0;
    border-bottom: 2px solid #151e22;
}

.app-title .title {
    font-size: 1.2rem;
    font-weight: 600;
}

.app-title .subtitle {
    font-size: 0.9rem;
    color: #d7d2c6;
}

.app-status {
    display: flex;
    gap: 0.5rem;
}

.app-body {
    flex: 1;
    min-height: 0;
    padding: 1.5rem;
}

.panel-card {
    display: flex;
    flex-direction: column;
    min-height: 0;
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
}

.panel-card .card-header {
    background: #f9f7f2;
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
}

.panel-body {
    flex: 1;
    min-height: 0;
    overflow: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.controls-panel {
    flex: 0 0 27%;
}

.tree-panel {
    flex: 1;
}

.details-panel {
    flex: 1;
}

.actions-panel {
    flex: 0 0 30%;
}

.treeview {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    font-size: 0.95rem;
}

.tree-node-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    border: 1px solid transparent;
}

.tree-node-row:hover {
    background: #f3efe5;
    border-color: var(--border-color);
}

.tree-node-row.selected {
    background: var(--highlight);
    border-color: #8d9b8f;
}

.tree-toggle {
    border: none;
    background: #f0ebe0;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 0.4rem;
    font-weight: 700;
    color: var(--accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tree-toggle:disabled {
    background: #f0ebe0;
    color: #b0a99f;
}

.tree-toggle-placeholder {
    opacity: 0.3;
}

.tree-node-type {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.tree-node-name {
    flex: 1;
}

.action-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.section-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--accent-light);
}

.code-input {
    font-family: "Courier New", monospace;
    text-transform: uppercase;
}

.code-row {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 0.5rem;
    align-items: center;
    margin-bottom: 0.5rem;
}

.validation-list {
    border-top: 1px solid var(--border-color);
    padding-top: 0.75rem;
    font-size: 0.85rem;
    color: #8b2c2c;
}

.validation-list ul {
    margin: 0.5rem 0 0;
    padding-left: 1.2rem;
}

.empty-state {
    color: #6c757d;
    font-size: 0.95rem;
}

.desktop-warning {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.desktop-warning .card {
    max-width: 420px;
    border: 1px solid var(--border-color);
    background: var(--panel-bg);
}

.not-found {
    padding: 2rem;
}

.toast-container .toast {
    opacity: 0;
    transform: translateY(-8px);
    animation: toast-in 0.25s ease-out forwards;
}

.toast-container .toast.toast-exit {
    animation: toast-out 0.2s ease-in forwards;
}

@keyframes toast-in {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes toast-out {
    to {
        opacity: 0;
        transform: translateY(-8px);
    }
}

@media (max-width: 991.98px) {
    body {
        overflow: auto;
    }
}