/* ── Reset & Variables ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg0:       #0d0d0d;
    --bg1:       #161616;
    --bg2:       #1e1e1e;
    --bg3:       #252525;
    --bg4:       #2e2e2e;
    --border:    #333;
    --text:      #d4d4d4;
    --text-dim:  #888;
    --text-xdim: #555;
    --accent:    #e05c00;
    --accent2:   #c04a00;
    --green:     #4caf50;
    --red:       #e05555;
    --yellow:    #e0b830;
    --blue:      #4a9eff;
    --font:      'Consolas', 'Courier New', monospace;
    --sidebar-w: 220px;
    --panel-w:   280px;
    --header-h:  38px;
}

body {
    background: var(--bg0);
    color: var(--text);
    font-family: var(--font);
    font-size: 12px;
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* ── Header ── */
#header {
    height: var(--header-h);
    background: var(--bg1);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 12px;
    gap: 16px;
    flex-shrink: 0;
    z-index: 100;
}

#header .logo {
    color: var(--accent);
    font-size: 14px;
    font-weight: bold;
    letter-spacing: 1px;
    white-space: nowrap;
}

#header .project-name {
    color: var(--text-dim);
    font-size: 11px;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#header .header-actions {
    display: flex;
    gap: 6px;
    align-items: center;
}

/* ── Layout ── */
#layout {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* ── Sidebar (árbol de recursos) ── */
#sidebar {
    width: var(--sidebar-w);
    background: var(--bg1);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow: hidden;
}

#sidebar-search {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 8px;
    border-bottom: 1px solid var(--border);
}

#sidebar-search input {
    flex: 1;
    min-width: 0;
    background: var(--bg3);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: var(--font);
    font-size: 11px;
    padding: 3px 6px;
    border-radius: 2px;
}

#btn-refresh-sidebar {
    flex-shrink: 0;
    background: none;
    border: 1px solid var(--border);
    color: var(--text-dim);
    border-radius: 2px;
    padding: 2px 5px;
    font-size: 12px;
    cursor: pointer;
    line-height: 1;
    transition: color 0.15s, border-color 0.15s;
}
#btn-refresh-sidebar:hover {
    color: var(--accent);
    border-color: var(--accent);
}
#btn-refresh-sidebar.refreshing {
    animation: spin 0.6s linear infinite;
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}

#sidebar-tree {
    flex: 1;
    overflow-y: auto;
    padding: 4px 0;
}

#sidebar-footer {
    border-top: 1px solid var(--border);
    padding: 6px 8px;
    flex-shrink: 0;
}

#btn-settings {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 100%;
    padding: 5px 8px;
    background: none;
    border: 1px solid transparent;
    color: var(--text-dim);
    font-size: 11px;
    font-family: var(--font);
    cursor: pointer;
    border-radius: 2px;
    text-align: left;
    letter-spacing: 0.5px;
}
#btn-settings:hover { background: var(--bg3); color: var(--text); }
#btn-settings.active { color: var(--accent); border-color: var(--accent); }

.tree-section {
    user-select: none;
}

.tree-section-header {
    display: flex;
    align-items: center;
    padding: 4px 8px;
    cursor: pointer;
    color: var(--text-dim);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    gap: 4px;
}

.tree-section-header:hover { background: var(--bg3); }

.tree-section-header .arrow {
    font-size: 8px;
    transition: transform 0.15s;
    display: inline-block;
    width: 10px;
}

.tree-section-header.collapsed .arrow { transform: rotate(-90deg); }

.tree-section-header .section-add {
    margin-left: auto;
    color: var(--accent);
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
    padding: 0 2px;
    opacity: 0;
    transition: opacity 0.15s;
}

.tree-section-header:hover .section-add { opacity: 1; }

.tree-items {
    padding-left: 0;
}

.tree-item {
    display: flex;
    align-items: center;
    padding: 3px 8px 3px 20px;
    cursor: pointer;
    gap: 5px;
    color: var(--text);
    border-left: 2px solid transparent;
}

.tree-item:hover  { background: var(--bg3); }
.tree-item.active {
    background: var(--bg4);
    border-left-color: var(--accent);
    color: #fff;
}

.tree-item .item-icon { color: var(--text-xdim); font-size: 10px; width: 12px; text-align: center; }
.tree-item .item-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree-item .item-del  { visibility: hidden; color: var(--text-xdim); font-size: 9px; padding: 0 2px; cursor: pointer; }
.tree-item .item-del:hover { color: #e06c75; }
.tree-item:hover .item-del { visibility: visible; }
.tree-item .item-badge {
    font-size: 9px;
    color: var(--text-xdim);
    background: var(--bg3);
    border-radius: 8px;
    padding: 1px 4px;
}

/* ── Main area ── */
#main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg2);
}

/* Tabs */
#tabs {
    display: flex;
    background: var(--bg1);
    border-bottom: 1px solid var(--border);
    overflow-x: hidden;
    flex-shrink: 0;
    height: 30px;
}

.tab {
    display: flex;
    align-items: center;
    padding: 0 14px;
    height: 30px;
    cursor: pointer;
    border-right: 1px solid var(--border);
    color: var(--text-dim);
    white-space: nowrap;
    gap: 6px;
    font-size: 11px;
    flex-shrink: 0;
}

.tab:hover  { background: var(--bg3); color: var(--text); }
.tab.active { background: var(--bg2); color: #fff; border-bottom: 2px solid var(--accent); }

.tab .tab-close {
    color: var(--text-xdim);
    font-size: 10px;
    padding: 1px 2px;
    border-radius: 2px;
}
.tab .tab-close:hover { background: var(--red); color: #fff; }
.tab .tab-dirty {
    font-size: 7px;
    color: var(--accent);
    line-height: 1;
    margin-right: -2px;
}

/* Editor area */
#editor-area {
    flex: 1;
    overflow: hidden;
    position: relative;
}

.editor-panel {
    position: absolute;
    inset: 0;
    display: none;
    flex-direction: column;
}

.editor-panel.active { display: flex; }

/* ── Welcome panel ── */
#welcome {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    color: var(--text-dim);
}

#welcome h1 { font-size: 32px; color: var(--accent); letter-spacing: 2px; }
#welcome p  { font-size: 13px; }

.welcome-grid {
    display: grid;
    grid-template-columns: repeat(3, 180px);
    gap: 12px;
    margin-top: 12px;
}

.welcome-card {
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 16px;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
    text-align: center;
}

.welcome-card:hover { border-color: var(--accent); background: var(--bg4); }
.welcome-card .card-icon { font-size: 28px; margin-bottom: 8px; }
.welcome-card .card-title { font-size: 12px; color: var(--text); margin-bottom: 4px; }
.welcome-card .card-desc  { font-size: 10px; color: var(--text-dim); }

/* Canvas editors (tileset / sprite) need the full width — hide properties panel */
#layout.canvas-editor #properties { display: none; }

/* ── Properties panel (right) ── */
#properties {
    width: var(--panel-w);
    background: var(--bg1);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    overflow-y: auto;
}

#properties-header {
    padding: 8px 10px;
    border-bottom: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.prop-section {
    border-bottom: 1px solid var(--border);
    padding: 8px 10px;
}

.prop-section-title {
    font-size: 10px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.prop-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 5px;
}

.prop-label {
    width: 90px;
    color: var(--text-dim);
    font-size: 11px;
    flex-shrink: 0;
}

.prop-value { flex: 1; }

/* ── Formularios ── */
input, select, textarea {
    background: var(--bg3);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: var(--font);
    font-size: 11px;
    padding: 3px 6px;
    border-radius: 2px;
    width: 100%;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
}

textarea { resize: vertical; min-height: 120px; }

/* ── Botones ── */
.btn {
    background: var(--bg3);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: var(--font);
    font-size: 11px;
    padding: 4px 10px;
    cursor: pointer;
    border-radius: 2px;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.btn:hover  { background: var(--bg4); border-color: #555; }
.btn-accent { background: var(--accent); border-color: var(--accent2); color: #fff; }
.btn-accent:hover { background: var(--accent2); }
.btn-danger { color: var(--red); }
.btn-danger:hover { background: var(--red); color: #fff; border-color: var(--red); }
.btn-small  { padding: 2px 7px; font-size: 10px; }

/* Variant bar — platforms that already have a specific variant */
.sys-btn.has-variant:not(.btn-accent) {
    background: #1f3a2a;
    border-color: #3a6a4a;
    color: #b0e0c0;
}
.sys-btn.has-variant:not(.btn-accent):hover {
    background: #2a4a36;
    border-color: #4a8060;
}

/* ── Modales ── */
#modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

#modal-overlay.open { display: flex; }

.modal {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 4px;
    min-width: 320px;
    max-width: 520px;
    width: 100%;
    box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}

.modal-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 { font-size: 13px; color: var(--text); }
.modal-body    { padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.modal-footer  { padding: 10px 16px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }

.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-label { font-size: 11px; color: var(--text-dim); }

/* ── Status bar ── */
#statusbar {
    height: 22px;
    background: var(--accent);
    color: #fff;
    display: flex;
    align-items: center;
    padding: 0 12px;
    gap: 16px;
    font-size: 10px;
    flex-shrink: 0;
}

#statusbar .status-item { display: flex; align-items: center; gap: 4px; }
#statusbar .status-sep  { color: rgba(255,255,255,0.4); }

/* ── Variables panel ── */
.var-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 11px;
}

.var-table th {
    text-align: left;
    padding: 3px 6px;
    color: var(--text-dim);
    border-bottom: 1px solid var(--border);
    font-weight: normal;
}

.var-table td { padding: 3px 6px; border-bottom: 1px solid #1a1a1a; }
.var-table tr:hover td { background: var(--bg3); }

.var-type {
    color: var(--blue);
    font-size: 10px;
}

.var-offset {
    color: var(--text-xdim);
    font-size: 10px;
}

/* ── Scrollbars ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg1); }
::-webkit-scrollbar-thumb { background: var(--bg4); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #444; }

/* ── Board (Trello-lite, full-screen overlay) ── */
#board-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg0);
    z-index: 900;
    display: flex;
    flex-direction: column;
}
#board-overlay.open { display: flex; }

#board-header {
    height: var(--header-h);
    background: var(--bg1);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 12px;
    gap: 12px;
    flex-shrink: 0;
}
#board-title { color: var(--accent); font-size: 13px; letter-spacing: 1px; }

#board-columns {
    flex: 1;
    display: grid;
    grid-auto-flow: column;
    gap: 12px;
    padding: 12px;
    overflow-x: auto;
    overflow-y: hidden;
    min-height: 0;
    align-items: stretch;
}

.board-col {
    background: var(--bg1);
    border: 1px solid var(--border);
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow: hidden;
}
.board-col.drag-over { border-color: var(--accent); background: var(--bg2); }

.board-col-header {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}
.board-col-header .col-title {
    flex: 1;
    cursor: text;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.board-col-header .col-title:hover { color: var(--text); }
.board-col-header .col-title-input {
    flex: 1;
    background: var(--bg3);
    border: 1px solid var(--accent);
    color: var(--text);
    font-family: var(--font);
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 2px;
    text-transform: none;
    letter-spacing: 0;
    min-width: 0;
}
.board-col-header .col-count {
    color: var(--text-xdim);
    background: var(--bg3);
    border-radius: 8px;
    padding: 1px 6px;
    font-size: 9px;
}
.board-col-header .col-del {
    color: var(--text-xdim);
    font-size: 11px;
    cursor: pointer;
    visibility: hidden;
    padding: 0 2px;
    line-height: 1;
}
.board-col:hover .col-del { visibility: visible; }
.board-col-header .col-del:hover { color: var(--red); }

.board-col-add-column {
    background: transparent;
    border: 1px dashed var(--border);
    min-width: 200px;
    align-self: start;
    max-height: 60px;
}
.board-col-add-column button {
    width: 100%;
    padding: 12px;
    background: none;
    border: none;
    color: var(--text-dim);
    font-family: var(--font);
    font-size: 11px;
    cursor: pointer;
    border-radius: 3px;
}
.board-col-add-column button:hover { color: var(--accent); background: var(--bg1); }
.board-col-add-column input {
    background: var(--bg3);
    border: 1px solid var(--accent);
    color: var(--text);
    font-family: var(--font);
    font-size: 12px;
    padding: 6px 8px;
    border-radius: 2px;
    width: 100%;
}
.board-col-add-column .add-actions {
    display: flex;
    gap: 6px;
    margin-top: 6px;
}

.board-col-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-height: 40px;
}

.board-card {
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 8px 10px;
    cursor: grab;
    font-size: 12px;
    color: var(--text);
    white-space: pre-wrap;
    word-break: break-word;
    position: relative;
    transition: border-color 0.1s, background 0.1s;
}
.board-card:hover { border-color: #555; background: var(--bg4); }
.board-card.dragging { opacity: 0.4; cursor: grabbing; }
.board-card .card-del {
    position: absolute;
    top: 4px;
    right: 6px;
    color: var(--text-xdim);
    font-size: 11px;
    cursor: pointer;
    visibility: hidden;
    line-height: 1;
    padding: 0 2px;
}
.board-card:hover .card-del { visibility: visible; }
.board-card .card-del:hover { color: var(--red); }
.board-card textarea {
    background: var(--bg2);
    border: 1px solid var(--accent);
    color: var(--text);
    font-family: var(--font);
    font-size: 12px;
    padding: 6px 8px;
    border-radius: 2px;
    width: 100%;
    resize: vertical;
    min-height: 60px;
}

.board-card-placeholder {
    height: 34px;
    border: 1px dashed var(--accent);
    border-radius: 3px;
    background: rgba(224, 92, 0, 0.08);
}

.board-col-add {
    padding: 6px 8px;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}
.board-col-add button {
    width: 100%;
    background: none;
    border: 1px dashed var(--border);
    color: var(--text-dim);
    font-family: var(--font);
    font-size: 11px;
    padding: 6px;
    border-radius: 2px;
    cursor: pointer;
}
.board-col-add button:hover { color: var(--accent); border-color: var(--accent); }
.board-col-add textarea {
    background: var(--bg3);
    border: 1px solid var(--accent);
    color: var(--text);
    font-family: var(--font);
    font-size: 12px;
    padding: 6px 8px;
    border-radius: 2px;
    width: 100%;
    resize: vertical;
    min-height: 56px;
}
.board-col-add .add-actions {
    display: flex;
    gap: 6px;
    margin-top: 6px;
}

.board-empty {
    color: var(--text-xdim);
    font-size: 11px;
    text-align: center;
    padding: 12px 6px;
    font-style: italic;
}

/* ── Utilidades ── */
.flex      { display: flex; }
.flex-col  { display: flex; flex-direction: column; }
.gap-4     { gap: 4px; }
.gap-8     { gap: 8px; }
.flex-1    { flex: 1; }
.p-8       { padding: 8px; }
.p-12      { padding: 12px; }
.text-dim  { color: var(--text-dim); }
.text-accent { color: var(--accent); }
.text-green  { color: var(--green); }
.text-red    { color: var(--red); }
.mt-8      { margin-top: 8px; }
.full-h    { height: 100%; }
.overflow-auto { overflow: auto; }