/* ─── Theme Variables ─────────────────────────────────────── */
:root, [data-theme="dark"] {
    --bg-body-start: #0b1220; --bg-body-mid: #101a2f; --bg-body-end: #162846;
    --bg:      #0f1b2e; --bg2:     #16243a; --bg3:     #1d2d48;
    --fg:      #eaf2ff; --fg2:     #8fa2bf; --border:  #26364f;
    --shadow:  rgba(0,0,0,0.3); --shadow-hover: rgba(0,0,0,0.4);
    --accent:  #60a5fa; --accent2: #f87171; --ok:      #34d399; --warn: #fbbf24;
    --card-bg: rgba(15,27,46,0.85); --input-bg:rgba(11,18,32,0.7); --hover: #1a2d47;
    --radius-sm: 4px; --radius-md: 8px; --radius-lg: 12px;
    --font-sans: 'Inter', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --tree-char: #3b82f6; --tree-meas: #22d3ee; --tree-axis: #fb923c;
    --tree-group: #facc15; --tree-compu: #f472b6; --tree-record: #34d399;
    --tree-addr: #f87171;
}
[data-theme="light"] {
    --bg-body-start: #c6e6fb; --bg-body-mid: #ccefdc; --bg-body-end: #f5d9e8;
    --bg:      #f2f7fb; --bg2:     #e8eef4; --bg3:     #dde5ed;
    --fg:      #132a46; --fg2:     #355676; --border:  #a9c3da;
    --shadow:  rgba(45,78,118,0.12); --shadow-hover: rgba(45,78,118,0.18);
    --accent:  #2f96bb; --accent2: #c53030; --ok:      #2f855a; --warn: #b7791f;
    --card-bg: rgba(255,255,255,0.88); --input-bg:rgba(242,247,251,0.7); --hover: #e8eef4;
    --radius-sm: 4px; --radius-md: 8px; --radius-lg: 12px;
    --font-sans: 'Inter', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --tree-char: #2f96bb; --tree-meas: #0891b2; --tree-axis: #ea580c;
    --tree-group: #b7791f; --tree-compu: #db2777; --tree-record: #2f855a;
    --tree-addr: #c53030;
}

/* ─── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: var(--font-sans);
    background: linear-gradient(135deg, var(--bg-body-start) 0%, var(--bg-body-mid) 52%, var(--bg-body-end) 100%);
    color: var(--fg); height: 100vh; overflow: hidden;
    line-height: 1.55; transition: background 0.3s, color 0.2s;
}

/* ─── Topbar (card style) ────────────────────────────────── */
.topbar {
    background: var(--card-bg); border: 1px solid var(--border);
    border-radius: var(--radius-md); box-shadow: 0 2px 8px var(--shadow);
    margin-bottom: 10px; overflow: hidden;
}
.topbar-inner {
    padding: 20px 24px 14px; display: flex; flex-direction: column;
    align-items: center; justify-content: center; position: relative;
}
.topbar-brand {
    display: flex; align-items: center; gap: 14px;
}
.brand-icon {
    display: flex; align-items: center; justify-content: center;
    width: 48px; height: 48px; border-radius: 12px; font-size: 1.4em;
    background: linear-gradient(120deg, #2f96bb 0%, #4fb8c9 60%, #7fd0df 100%);
    box-shadow: 0 4px 12px rgba(47,150,187,0.35);
}
.brand-title { font-weight: 700; font-size: 1.3em; }
.brand-sub { font-size: 0.78em; color: var(--fg2); margin-top: 6px; }

.brand-watermark {
    position: absolute; left: 20px;
    display: inline-block; padding: 4px 14px;
    background: var(--accent);
    color: #fff; font-weight: 700; font-size: 0.85em;
    border-radius: 20px; text-decoration: none;
    transition: opacity 0.2s; z-index: 5;
}
.brand-watermark:hover { opacity: 0.85; }

/* Splitter bar */
.splitter-bar {
    width: 4px; cursor: col-resize; flex-shrink: 0; align-self: stretch;
    background: transparent; transition: background 0.2s;
    min-height: 200px; border-radius: 2px;
}
.splitter-bar:hover, .splitter-bar.active { background: var(--accent); opacity: 0.4; }
.splitter-bar:hover, .splitter-bar.active { background: var(--accent); }

/* ─── Page (full-width) ──────────────────────────────────── */
body { display: flex; flex-direction: column; }
.page { padding: 0 14px 0; flex: 1; display: flex; flex-direction: column; min-height: 0; }

/* ─── Hero Upload ────────────────────────────────────────── */
.upload-hero { padding: 0; }
.drop-zone {
    border: 2px dashed var(--border); border-radius: var(--radius-lg);
    cursor: pointer; transition: all 0.25s; position: relative;
    background: rgba(128,128,128,0.04); backdrop-filter: blur(2px);
}
.drop-zone:hover, .drop-zone.drag-over {
    border-color: var(--accent); background: rgba(128,128,128,0.08);
    box-shadow: 0 0 24px rgba(47,150,187,0.08);
}
.drop-inner { padding: 56px 20px; text-align: center; pointer-events: none; }
.drop-icon { font-size: 2.8em; margin-bottom: 8px; color: var(--fg2); }
.drop-inner h2 { font-size: 1.15em; font-weight: 600; margin-bottom: 4px; }
.drop-inner p  { font-size: 0.85em; color: var(--fg2); }
.drop-zone input[type="file"] { position: absolute; inset: 0; opacity: 0; cursor: pointer; }

/* ─── Compact Bar ────────────────────────────────────────── */
.compact-bar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 18px; gap: 16px;
}
#change-file-btn { width: auto !important; min-width: 0; align-self: center; }
.file-info { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; flex: 1; }
.file-tag { font-weight: 600; font-size: 0.9em; }
.file-meta { font-size: 0.82em; color: var(--fg2); }
.file-divider { width: 1px; height: 16px; background: var(--border); }

/* ─── Main Layout ───────────────────────────────── */
.main-layout {
    display: flex; gap: 0; align-items: stretch;
    flex: 1; min-height: 0;
}
#left-col { overflow-y: auto !important; }
@media (max-width: 960px) {
    .main-layout { flex-direction: column; }
    #a2l-splitter { display: none; }
    #left-col { width: 100% !important; }
}

/* ─── Cards ──────────────────────────────────────────────── */
.cards { display: flex; flex-direction: column; gap: 6px; }
.card {
    background: var(--card-bg); border: 1px solid var(--border);
    border-radius: var(--radius-md); box-shadow: 0 2px 8px var(--shadow);
    transition: background 0.2s, border 0.2s, box-shadow 0.2s;
}
.card:hover { box-shadow: 0 4px 16px var(--shadow-hover); }
.card-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 16px; border-bottom: 1px solid var(--border);
    background: var(--bg2); flex-wrap: nowrap; gap: 6px;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}
.card-header h2 { font-size: 0.88em; font-weight: 600; white-space: nowrap; }
.card-title-group { display: flex; align-items: baseline; gap: 6px; flex-shrink: 0; }
.card-hint  { font-size: 0.74em; color: var(--fg2); }
.card-actions { display: flex; align-items: center; gap: 10px; }
.card-body { padding: 6px 16px; }
.card-footer {
    padding: 10px 16px; border-top: 1px solid var(--border);
    display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
    background: var(--bg2);
}

/* ─── Buttons ────────────────────────────────────────────── */
.btn-primary, .btn-ghost {
    padding: 5px 14px !important; font-size: 0.8em !important; line-height: 1.4;
    background: var(--accent); color: #fff;
    border: none !important; border-radius: 6px; cursor: pointer;
    font-weight: 600; transition: all 0.15s; white-space: nowrap;
}
.btn-primary:hover:not(:disabled), .btn-ghost:hover {
    opacity: 0.9; transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(47,150,187,0.25);
}
.btn-primary:disabled { opacity: 0.35; cursor: not-allowed; }

/* button group & separator */
.btn-group { display: inline-flex; gap: 2px; }
.btn-sep {
    display: inline-block; width: 1px; height: 14px; margin: 0 4px;
    background: var(--border); align-self: center; flex-shrink: 0;
}
.tree-stats { font-size: 0.78em; color: var(--fg2); line-height: 1; }
.tree-only.hidden { display: none; }

/* ─── Form Elements ──────────────────────────────────────── */
.form-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
.form-row label { font-size: 0.84em; color: var(--fg2); font-weight: 500; }
.form-row select {
    padding: 5px 10px; background: var(--input-bg); color: var(--fg);
    border: 1px solid var(--border); border-radius: 6px; font-size: 0.84em; outline: none;
}
.form-row select:focus { border-color: var(--accent); }

/* ─── Code Textarea ──────────────────────────────────────── */
.code-area {
    width: 100%; padding: 10px; background: var(--input-bg); color: var(--fg);
    border: 1px solid var(--border); border-radius: 8px;
    font-family: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
    font-size: 0.76em; resize: vertical; outline: none; transition: border-color 0.2s;
}
.code-area:focus { border-color: var(--accent); }

/* ─── Tables ─────────────────────────────────────────────── */
.tbl-wrap { overflow-y: auto; border: 1px solid var(--border); border-radius: 8px; background: var(--input-bg); }
.tbl { width: 100%; border-collapse: collapse; font-size: 0.74em; font-family: 'SF Mono', 'Cascadia Code', 'Consolas', monospace; }
.tbl thead { position: sticky; top: 0; z-index: 1; }
.tbl th { background: var(--bg3); color: var(--fg2); padding: 4px 8px; text-align: left; font-weight: 600; border-bottom: 2px solid var(--border); }
.tbl td { padding: 3px 8px; border-bottom: 1px solid var(--border); }
.tbl tbody tr:hover td { background: var(--hover); }

/* ─── Inline Status ───────────────────────────────────────── */
.inline-status { font-size: 0.82em; color: var(--accent); }
.inline-meta   { font-size: 0.78em; color: var(--fg2); }
.t-found    { color: var(--ok); font-weight: 600; }
.t-notfound { color: var(--accent2); font-weight: 600; }

/* ─── Config Editor ───────────────────────────────────────── */
.cfg-section { margin-bottom: 6px; padding-bottom: 6px; border-bottom: 1px solid var(--border); }
.cfg-section:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }
.cfg-section-title {
    font-size: 0.82em; font-weight: 600; color: var(--fg2);
    padding: 2px 0; margin-bottom: 4px;
}
.cfg-section-title.cfg-toggle { cursor: pointer; user-select: none; }
.cfg-section-title.cfg-toggle:hover { color: var(--accent); }
.cfg-toggle-body.hidden { display: none; }
.cfg-grid { display: grid; gap: 4px 12px; }
.cfg-grid.cols-2 { grid-template-columns: 1fr 1fr; }
.cfg-label { display: flex; flex-direction: column; gap: 3px; font-size: 0.78em; color: var(--fg2); font-weight: 500; }
.cfg-row { display: flex; align-items: center; gap: 8px; padding: 2px 0; }
.cfg-row-label { font-size: 0.78em; color: var(--fg2); font-weight: 500; white-space: nowrap; }
.cfg-input {
    padding: 6px 10px; background: var(--bg); color: var(--fg);
    border: 1px solid var(--border); border-radius: 6px;
    font-size: 0.82em; font-family: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
    outline: none; transition: border-color 0.15s;
}
.cfg-input:focus { border-color: var(--accent); box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 20%, transparent); }
.cfg-radio-group { display: flex; gap: 10px; flex-wrap: wrap; }
.cfg-radio { display: flex; align-items: center; gap: 4px; font-size: 0.82em; cursor: pointer; color: var(--fg); }
.cfg-radio input[type="radio"] { accent-color: var(--accent); }
.cfg-list { display: flex; flex-direction: column; gap: 3px; }
.cfg-seg-item {
    background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 6px 8px;
}
.cfg-seg-header {
    display: flex; align-items: center; gap: 4px; cursor: pointer; user-select: none;
    padding: 1px 0;
}
.cfg-seg-header:hover { opacity: 0.85; }
.cfg-seg-label { font-size: 0.8em; font-weight: 600; color: var(--accent); flex: 1; }
.cfg-seg-arrow { font-size: 0.7em; color: var(--fg2); transition: transform 0.15s; }
.cfg-seg-header .cfg-remove-btn { width: auto; flex-shrink: 0; font-size: 0.72em; padding: 2px 8px; }
.cfg-seg-header.collapsed .cfg-seg-arrow { transform: rotate(-90deg); }
.cfg-seg-field {
    display: flex; align-items: center; gap: 6px;
    font-size: 0.74em; color: var(--fg2);
}
.cfg-seg-field .cfg-input { flex: 1; font-size: 0.95em; padding: 2px 6px; }
.cfg-seg-row {
    display: flex; flex-direction: column; gap: 4px;
}
.cfg-seg-toggle {
    font-size: 0.74em; color: var(--accent); cursor: pointer; padding: 4px 0 0;
    user-select: none;
}
.cfg-seg-toggle:hover { text-decoration: underline; }
.cfg-seg-item .cfg-toggle-body { padding: 3px 0 0; }
.cfg-seg-item .cfg-grid { gap: 3px 8px; }
.cfg-seg-item .cfg-grid .cfg-input { font-size: 0.74em; padding: 4px 6px; }

.cfg-subtitle {
    font-size: 0.72em; color: var(--fg2); margin: 4px 0 2px; font-weight: 500;
    display: flex; align-items: center; gap: 4px;
}
.cfg-add-page-btn { font-size: 0.8em; padding: 0 4px; }

.cfg-page-item { display: flex; flex-direction: column; gap: 2px; padding: 2px 0; }
.cfg-page-field {
    display: flex; align-items: center; gap: 6px;
    font-size: 0.72em; color: var(--fg2);
}
.cfg-page-field .cfg-input { flex: 1; font-size: 0.95em; padding: 3px 5px; }
.cfg-page-item select.cfg-input { font-family: inherit; }

/* Add/remove button colors */
.cfg-remove-btn, .cfg-add-btn { border: 1px solid transparent; border-radius: 4px; cursor: pointer; font-size: 0.74em; padding: 2px 10px; }
.cfg-remove-btn { color: var(--accent2); background: none; width: auto; }
.cfg-remove-btn:hover { background: var(--accent2); color: #fff; }
.cfg-add-btn { color: var(--accent); background: none; }
.cfg-add-btn:hover { background: var(--accent); color: var(--bg); }

.cfg-offset-item {
    display: flex; align-items: center; gap: 4px; flex-wrap: wrap;
    padding: 3px 6px; background: var(--bg); border: 1px solid var(--border); border-radius: 6px;
}
.cfg-offset-item .cfg-input { font-size: 0.74em; padding: 3px 5px; min-width: 0; }
.cfg-offset-item .cfg-off-src, .cfg-offset-item .cfg-off-dest { flex: 0 1 85px; }
.cfg-offset-item .cfg-off-size { flex: 0 1 65px; }

.cfg-remove-btn {
    padding: 0 4px; font-size: 0.72em; line-height: 1.3;
    background: none; border: none; border-radius: 3px;
    cursor: pointer; flex-shrink: 0;
}
.cfg-event-item {
    border: 1px solid var(--border); border-radius: 6px; overflow: hidden;
}
.cfg-event-item .cfg-toggle-body { padding: 3px 4px; }
.cfg-ev-field {
    display: flex; flex-direction: column; gap: 2px;
    font-size: 0.72em; color: var(--fg2);
}
.cfg-ev-field .cfg-input { font-size: 0.95em; padding: 3px 5px; width: 100%; }

.cfg-add-btn { margin-top: 2px; font-size: 0.74em; }

/* ─── A2L Tree View ──────────────────────────────────────── */
.tree-container {
    background: var(--input-bg); border: 1px solid var(--border);
    border-radius: var(--radius-md); min-height: 200px; max-height: calc(100vh - 200px);
    overflow: auto; font-family: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
    font-size: 0.78em; overflow-x: auto; min-height: 200px;
    flex: 1;
}
.tree-placeholder {
    display: flex; align-items: center; justify-content: center;
    min-height: 200px; color: var(--fg2); font-size: 0.9em;
}

.tree-node { }
.tree-row {
    display: flex; align-items: center; padding: 2px 6px 2px 0; cursor: pointer;
    white-space: nowrap; border-radius: var(--radius-sm); gap: 2px;
    transition: background 0.1s;
}
.tree-row:hover { background: var(--hover); }

.tree-toggle {
    width: 16px; height: 16px; display: inline-flex; align-items: center; justify-content: center;
    flex-shrink: 0; font-size: 0.7em; color: var(--fg2); transition: transform 0.15s;
}
.tree-toggle.open { transform: rotate(90deg); }
.tree-toggle.leaf { visibility: hidden; }

.tree-icon { margin-right: 4px; flex-shrink: 0; font-size: 0.85em; }

.tree-name { font-weight: 600; margin-right: 6px; }
.tree-name.char  { color: var(--tree-char); }
.tree-name.meas  { color: var(--tree-meas); }
.tree-name.axis  { color: var(--tree-axis); }
.tree-name.group { color: var(--tree-group); }
.tree-name.compu { color: var(--tree-compu); }
.tree-name.record{ color: var(--tree-record); }

.tree-params { color: var(--fg2); font-size: 0.92em; }
.tree-children { padding-left: 18px; }

/* Detail view (key: value pairs when expanded) */
.tree-detail {
    display: flex; padding: 1px 0; white-space: nowrap;
    border-bottom: 1px solid rgba(128,128,128,0.05);
}
.detail-name {
    color: var(--fg2); min-width: 180px; flex-shrink: 0;
    font-size: 0.92em; padding-right: 8px;
    text-align: right;
}
.detail-name::after { content: ':'; }
.detail-value {
    color: var(--fg); font-weight: 500;
}

.tree-highlight {
    background: var(--accent) !important; color: var(--bg) !important;
    border-radius: 3px;
    animation: tree-flash 1.2s ease-out;
}
.tree-highlight .tree-name,
.tree-highlight .tree-params,
.tree-highlight .tree-toggle,
.tree-highlight .tree-icon { color: var(--bg) !important; }

@keyframes tree-flash {
    0%   { box-shadow: 0 0 0 4px var(--accent); }
    100% { box-shadow: 0 0 0 0px transparent; }
}

.tree-mark {
    background: rgba(255,200,40,0.35); color: inherit;
    border-radius: 2px; padding: 0 1px;
}

.tree-ref {
    color: var(--accent); text-decoration: underline; text-underline-offset: 2px;
    cursor: pointer;
}
.tree-ref:hover { color: var(--accent2); }

.tree-raw {
    margin: 0; padding: 6px 12px; color: var(--fg2);
    font-size: 0.85em; white-space: pre-wrap; word-break: break-all;
    max-height: 300px; overflow: auto;
    background: var(--bg); border-left: 2px solid var(--border);
}

/* ─── A2L File List ──────────────────────────────────────── */
.a2l-file-list {
    display: flex; flex-wrap: wrap; gap: 4px;
    padding: 4px 10px; background: var(--bg2); border-bottom: 1px solid var(--border);
}
.a2l-file-tag {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 2px 8px; background: var(--bg3); color: var(--fg);
    border: 1px solid var(--border); border-radius: 4px;
    font-size: 0.74em; font-family: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
}
.a2l-file-tag .rm-tag {
    cursor: pointer; color: var(--fg2); font-weight: 700; margin-left: 2px;
}
.a2l-file-tag .rm-tag:hover { color: var(--accent2); }

/* ─── Tree Search ────────────────────────────────────────── */
.tree-search {
    display: flex; gap: 8px; padding: 6px 10px;
    border-bottom: 1px solid var(--border); background: var(--bg2);
}
.tree-search input {
    flex: 1; padding: 4px 8px; background: var(--bg); color: var(--fg);
    border: 1px solid var(--border); border-radius: 4px; font-size: 0.8em;
    font-family: inherit; outline: none;
}
.tree-search input:focus { border-color: var(--accent); }
.tree-search .tree-stats { font-size: 0.78em; color: var(--fg2); white-space: nowrap; }

.status-bar {
    padding: 4px 12px; margin-top: auto; font-size: 0.76em; color: var(--fg2);
    border: 1px solid var(--border); border-radius: 8px;
    background: transparent;
    flex-shrink: 0; display: flex; gap: 16px; flex-wrap: wrap;
}
/* ─── Utilities ───────────────────────────────────────────── */
.hidden { display: none !important; }
.mono { font-family: 'SF Mono', 'Cascadia Code', 'Consolas', monospace; }

/* ─── Scrollbar ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--fg2); }