:root {
    --bg: #f3f4f7;
    --panel: #ffffff;
    --line: #d9dce3;
    --text: #1f2937;
    --muted: #6b7280;
    --accent: #23277a;
    --accent-text: #ffffff;
    --accent-soft: #e6e7f6;
    --warn: #b45309;
    --warn-bg: #fff7e6;
    --warn-line: #f3d9a4;
    --input-bg: #ffffff;
    --hover: #f1f2f6;
    --code-bg: #eef0f6;
    --danger: #b91c1c;
    --link: #23277a;
    --shadow: rgba(20, 24, 60, .18);
    color-scheme: light;
}

/* Koyu tema */
:root[data-theme="dark"] {
    --bg: #14161c;
    --panel: #1d2028;
    --line: #313644;
    --text: #e5e7eb;
    --muted: #9aa3b2;
    --accent: #6d7cf0;
    --accent-text: #ffffff;
    --accent-soft: #2a2f55;
    --warn: #f0b35a;
    --warn-bg: #3a2f17;
    --warn-line: #6b5524;
    --input-bg: #151821;
    --hover: #2a2e3a;
    --code-bg: #2a2e3a;
    --danger: #f87171;
    --link: #a5b0ff;
    --shadow: rgba(0, 0, 0, .5);
    color-scheme: dark;
}

/* Blueprint (mavi kopya) teması */
:root[data-theme="blueprint"] {
    --bg: #0a2848;
    --panel: #0f3260;
    --line: #2a5a90;
    --text: #e8f1fc;
    --muted: #a3c0e2;
    --accent: #5aa9ff;
    --accent-text: #06213f;
    --accent-soft: #1c4a80;
    --warn: #ffd166;
    --warn-bg: #1a4577;
    --warn-line: #3b6ea6;
    --input-bg: #0b2a50;
    --hover: #194778;
    --code-bg: #194778;
    --danger: #ff9f9f;
    --link: #9fd0ff;
    --shadow: rgba(0, 10, 30, .55);
    color-scheme: dark;
}

* { box-sizing: border-box; }

html, body, #app { height: 100%; margin: 0; }

body {
    font: 13px/1.4 "Segoe UI", system-ui, sans-serif;
    color: var(--text);
    background: var(--bg);
    overflow: hidden;
}

.boot { display: grid; place-items: center; height: 100%; color: var(--muted); }

.shell { display: grid; grid-template-rows: auto 1fr auto; height: 100%; }

.toolbar {
    display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
    padding: 6px 10px; background: var(--panel); border-bottom: 1px solid var(--line);
}
.toolbar .title { font-weight: 600; margin-right: 8px; }
.toolbar .sep { width: 1px; align-self: stretch; background: var(--line); margin: 0 4px; }
.toolbar .spacer { flex: 1; }

button, .btn {
    font: inherit; color: var(--text); background: var(--panel);
    border: 1px solid var(--line); border-radius: 6px; padding: 4px 10px; cursor: pointer;
}
button:hover, .btn:hover { background: var(--hover); }
button.active, button.active:hover { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
button:disabled { opacity: .45; cursor: default; }
button.small { padding: 2px 7px; }
button.danger { color: var(--danger); }

.seg { display: inline-flex; }
.seg button { border-radius: 0; margin-left: -1px; }
.seg button:first-child { border-radius: 6px 0 0 6px; margin-left: 0; }
.seg button:last-child { border-radius: 0 6px 6px 0; }

/* Yerleşim: araç çubuğu | proje paneli | çizim | özellik paneli. Paneller gizlenebilir, araç çubuğu daralır. */
.main {
    --rail-w: 132px; --left-w: 270px; --right-w: 290px;
    display: grid; grid-template-columns: var(--rail-w) var(--left-w) 1fr var(--right-w); min-height: 0;
}
.main.no-left { --left-w: 0px; }
.main.no-right { --right-w: 0px; }
.main.rail-compact { --rail-w: 52px; }
/* Her bölüm kendi sütununda sabit: bir panel gizlenince diğerleri onun sütununa kaymaz */
.main > .rail { grid-column: 1; }
.main > .panel.left { grid-column: 2; }
.main > .canvas-wrap { grid-column: 3; }
.main > .panel.right { grid-column: 4; }
.main > * { grid-row: 1; }
.main.no-left > .panel.left, .main.no-right > .panel.right { display: none; }

/* Çizim alanının kenarındaki gizle/göster tutamaçları */
.edge-handle {
    position: absolute; top: 50%; transform: translateY(-50%); z-index: 4;
    width: 16px; height: 56px; padding: 0; font-size: 14px; line-height: 1;
    color: var(--muted); background: var(--panel); border: 1px solid var(--line); opacity: .85;
}
.edge-handle:hover { opacity: 1; color: var(--text); }
.edge-handle.left { left: 0; border-left: 0; border-radius: 0 8px 8px 0; }
.edge-handle.right { right: 0; border-right: 0; border-radius: 8px 0 0 8px; }

/* Dar araç çubuğu: tek sütun, yalnız ikon (ad, ipucu olarak görünür) */
.rail-toggle { width: 100%; padding: 0; height: 18px; font-size: 12px; line-height: 1; color: var(--muted); margin-bottom: 2px; }
.main.rail-compact .rail { padding: 6px 4px 12px; }
.main.rail-compact .rail .tiles { grid-template-columns: 1fr; }
.main.rail-compact .rail h4 { height: 0; margin: 6px 0 4px; overflow: hidden; border-top: 1px solid var(--line); }
.main.rail-compact button.tool { min-height: 34px; padding: 6px 0; }
.main.rail-compact button.tool span { display: none; }
.main.rail-compact .rail select { padding: 3px 0; font-size: 10px; }

/* İkonlar */
.ic { width: 20px; height: 20px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }

/* Üst çubuk: proje ve dosya işlemleri, tema, yardım */
.topbar { flex-wrap: nowrap; overflow-x: auto; }
.topbar button, .topbar .btn { display: inline-flex; align-items: center; gap: 5px; white-space: nowrap; }
.topbar .ic { width: 16px; height: 16px; }
.topbar .title { white-space: nowrap; }

/* Sol araç çubuğu: gruplar hâlinde ikonlu düğmeler */
.rail { background: var(--panel); border-right: 1px solid var(--line); overflow-y: auto; padding: 6px 6px 12px; min-height: 0; }
.rail h4 { font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 10px 2px 4px; }
.rail h4:first-child { margin-top: 2px; }
.rail .tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.rail select { margin-top: 4px; font-size: 12px; padding: 4px; }
.rail select.active { border-color: var(--accent); }
button.tool {
    display: flex; flex-direction: column; align-items: center; justify-content: flex-start; gap: 3px;
    padding: 6px 2px 4px; min-height: 50px; font-size: 10.5px; line-height: 1.15; text-align: center;
}

.panel { background: var(--panel); overflow-y: auto; padding: 10px; min-height: 0; }
.panel.left { border-right: 1px solid var(--line); }
.panel.right { border-left: 1px solid var(--line); }

.panel h3 {
    font-size: 11px; text-transform: uppercase; letter-spacing: .06em;
    color: var(--muted); margin: 14px 0 6px;
}
.panel h3:first-child { margin-top: 0; }

.canvas-wrap { position: relative; min-width: 0; min-height: 0; }
.plan-canvas { display: block; width: 100%; height: 100%; outline: none; cursor: crosshair; }

.statusbar {
    display: flex; gap: 16px; padding: 4px 10px; background: var(--panel);
    border-top: 1px solid var(--line); color: var(--muted); font-size: 12px;
}
.statusbar .msg { color: var(--warn); }
.statusbar .spacer { flex: 1; }
#status-coords { font-variant-numeric: tabular-nums; }

.form { display: grid; grid-template-columns: 1fr 96px; gap: 5px 8px; align-items: center; }
.form label { color: var(--muted); }
.form .wide { grid-column: 1 / -1; }

input, select {
    font: inherit; color: var(--text); width: 100%;
    border: 1px solid var(--line); border-radius: 5px; padding: 3px 6px; background: var(--input-bg);
}
input:focus, select:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }

.list { display: flex; flex-direction: column; gap: 3px; }
.list .item {
    display: flex; align-items: center; gap: 6px; padding: 4px 8px;
    border: 1px solid var(--line); border-radius: 6px; cursor: pointer;
}
.list .item.active { background: var(--accent-soft); border-color: var(--accent); }
.list .item .grow { flex: 1; }
.list .item small { color: var(--muted); }

.list .item.check { font-size: 12px; background: var(--warn-bg); border-color: var(--warn-line); align-items: flex-start; }
.list .item.check:hover { border-color: var(--warn); }

.row { display: flex; gap: 6px; align-items: center; margin-top: 6px; flex-wrap: wrap; }
.row > input, .row > select { flex: 1; min-width: 0; }

.group { border: 1px solid var(--line); border-radius: 8px; padding: 8px; margin-bottom: 8px; }

.axis-row { display: grid; grid-template-columns: 52px 1fr 58px 24px; gap: 4px; align-items: center; margin-top: 3px; }
.axis-row.head { color: var(--muted); font-size: 11px; }
.axis-row button { padding: 1px 0; }
.axis-row.sel input { border-color: #e8730c; }

.refgrid { display: grid; grid-template-columns: repeat(3, 30px); gap: 3px; }
.refgrid button { padding: 0; height: 26px; font-size: 11px; }

.props { display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; font-variant-numeric: tabular-nums; }
.props dt { color: var(--muted); }
.props dd { margin: 0; text-align: right; }

.badge { display: inline-block; padding: 1px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.badge.col { background: var(--accent-soft); color: var(--link); }
.badge.wall { background: #f6e1d6; color: #8a3b1c; }

.warn {
    background: var(--warn-bg); color: var(--warn); border: 1px solid var(--warn-line);
    border-radius: 6px; padding: 5px 8px; margin-top: 6px; font-size: 12px;
}
.hint { color: var(--muted); font-size: 12px; margin-top: 6px; }

#blazor-error-ui {
    display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 1000;
    padding: 8px 14px; background: #fde68a; color: #1f2937;
}

.tables {
    position: absolute; inset: 10px; z-index: 5; overflow: auto; padding: 12px 14px;
    background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
    box-shadow: 0 8px 30px var(--shadow);
}
.tables h3 { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 14px 0 6px; }
.tables table { border-collapse: collapse; width: 100%; font-variant-numeric: tabular-nums; }
.tables th, .tables td { border-bottom: 1px solid var(--line); padding: 3px 8px; text-align: right; white-space: nowrap; }
.tables th:first-child, .tables td:first-child { text-align: left; }
.tables th { color: var(--muted); font-weight: 600; font-size: 12px; }
.tables tr.total td { font-weight: 600; border-top: 2px solid var(--text); }
/* Yardım penceresi: kılavuz metni */
.tables.help { max-width: 900px; margin: 0 auto; line-height: 1.5; padding-top: 0; }
.help .help-bar { position: sticky; top: 0; background: var(--panel); padding: 10px 0 8px; border-bottom: 1px solid var(--line); z-index: 1; }
.help h1 { font-size: 20px; margin: 14px 0 8px; }
.help h2 { font-size: 16px; margin: 22px 0 8px; padding-top: 10px; border-top: 1px solid var(--line); }
.help h3 { font-size: 13px; text-transform: none; letter-spacing: 0; color: var(--text); margin: 16px 0 6px; }
.help p { margin: 6px 0; }
.help ul, .help ol { margin: 6px 0; padding-left: 22px; }
.help li { margin: 3px 0; }
.help th, .help td { text-align: left; white-space: normal; vertical-align: top; padding: 5px 8px; }
.help table { margin: 8px 0; font-variant-numeric: normal; }
.help code { background: var(--code-bg); border-radius: 4px; padding: 1px 5px; font-size: 12px; }
.help pre { background: var(--code-bg); border-radius: 6px; padding: 8px 10px; overflow: auto; }
.help pre code { background: none; padding: 0; }
.help hr { border: 0; border-top: 1px solid var(--line); margin: 14px 0; }
.help a { color: var(--link); }
.list .item .grow, .row .grow { flex: 1; min-width: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 4px; }
.chips button { padding: 2px 8px; font-size: 12px; }