:root {
    --bg: #f4f1ec;
    --panel: #ffffff;
    --ink: #1f2a30;
    --muted: #6b7479;
    --line: #ddd6cc;
    --accent: #c4561b;
    --accent-ink: #ffffff;
    --blue: #1d6fb8;
    --grid: #e6e0d6;
    --grid-strong: #d3cabd;
    --radius: 10px;
    --tap: 48px;
    color-scheme: light;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    height: 100%;
    background: var(--bg);
    color: var(--ink);
    font: 16px/1.35 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    -webkit-tap-highlight-color: transparent;
    overscroll-behavior: none;
}

button { font: inherit; color: inherit; }

.screen { display: flex; flex-direction: column; height: 100dvh; }
.screen[hidden] { display: none; }

/* Top bar */
.topbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--ink);
    color: #fff;
    min-height: 60px;
    flex: none;
}
.topbar .btn { background: rgba(255, 255, 255, 0.1); color: #fff; border-color: transparent; }
.topbar .btn.primary { background: var(--accent); }
.topbar-spacer { flex: 1; }
.brand { margin: 0; font-size: 22px; letter-spacing: 0.02em; }
.title { min-width: 0; }
.title-main { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.title-sub { font-size: 13px; opacity: 0.7; }

.btn {
    min-height: 44px;
    padding: 0 16px;
    border-radius: var(--radius);
    border: 1px solid var(--line);
    background: var(--panel);
    cursor: pointer;
    white-space: nowrap;
}
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.icon { font-size: 28px; padding: 0 14px; line-height: 1; }
.btn.active { background: var(--ink); color: #fff; }
.btn:disabled { opacity: 0.4; }

.segmented { display: flex; background: rgba(255, 255, 255, 0.1); border-radius: var(--radius); padding: 3px; }
.segmented button {
    border: 0;
    background: none;
    color: #fff;
    padding: 0 18px;
    min-height: 40px;
    border-radius: 8px;
    cursor: pointer;
    opacity: 0.75;
}
.segmented button.active { background: #fff; color: var(--ink); opacity: 1; font-weight: 600; }

.menu { position: relative; }
.menu-list {
    position: absolute;
    right: 0;
    top: calc(100% + 6px);
    background: var(--panel);
    color: var(--ink);
    border-radius: var(--radius);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    z-index: 20;
    min-width: 200px;
}
.menu-list button { display: block; width: 100%; text-align: left; border: 0; background: none; padding: 14px 16px; cursor: pointer; }
.menu-list button + button { border-top: 1px solid var(--line); }

/* Home */
.sketch-list { padding: 16px; overflow: auto; display: grid; gap: 20px; }
.client h2 { margin: 0 0 8px; font-size: 15px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.card {
    position: relative;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 12px;
    cursor: pointer;
    text-align: left;
    display: block;
    width: 100%;
}
.card svg { width: 100%; height: 110px; display: block; margin-bottom: 8px; }
.card .name { font-weight: 600; }
.card .meta { color: var(--muted); font-size: 13px; }
.card .delete {
    position: absolute;
    top: 6px;
    right: 6px;
    border: 0;
    background: none;
    color: var(--muted);
    font-size: 22px;
    width: 40px;
    height: 40px;
    cursor: pointer;
}
.empty { color: var(--muted); text-align: center; padding: 60px 16px; }

/* Workspace */
.workspace { flex: 1; position: relative; min-height: 0; }
.pane { position: absolute; inset: 0; }
.pane[hidden] { display: none; }

.sketch-svg { width: 100%; height: 100%; display: block; touch-action: none; background: var(--bg); user-select: none; -webkit-user-select: none; }

.floating { position: absolute; display: flex; gap: 8px; z-index: 5; }
.floating.left { left: 12px; top: 12px; flex-direction: column; align-items: flex-start; }
.floating.bottom { left: 50%; bottom: 64px; transform: translateX(-50%); }
.floating .btn { box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08); }
.field {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 0 12px;
    min-height: 44px;
    font-size: 14px;
}
.field input { width: 70px; font: inherit; border: 0; border-bottom: 1px solid var(--line); text-align: right; background: none; }

.hint {
    position: absolute;
    left: 50%;
    bottom: 14px;
    transform: translateX(-50%);
    background: rgba(31, 42, 48, 0.85);
    color: #fff;
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 15px;
    pointer-events: none;
    white-space: nowrap;
    z-index: 5;
}
.hint:empty { display: none; }

/* Sketch drawing */
.grid-minor { stroke: var(--grid); stroke-width: 1; vector-effect: non-scaling-stroke; }
.grid-major { stroke: var(--grid-strong); stroke-width: 1; vector-effect: non-scaling-stroke; }
.stroke-live { fill: none; stroke: var(--blue); stroke-width: 3; vector-effect: non-scaling-stroke; stroke-linecap: round; stroke-linejoin: round; opacity: 0.7; }
.outline-fill { fill: rgba(196, 86, 27, 0.06); }
.wall-line { stroke: var(--ink); stroke-width: 6; vector-effect: non-scaling-stroke; stroke-linecap: round; }
.corner-handle { fill: #fff; stroke: var(--ink); stroke-width: 2; vector-effect: non-scaling-stroke; cursor: grab; }
.wall-tag circle { fill: var(--accent); }
.wall-tag text { fill: #fff; font-weight: 700; text-anchor: middle; dominant-baseline: central; }
.wall-length { fill: var(--muted); text-anchor: middle; dominant-baseline: central; }

/* Room view */
.room-wrap { position: absolute; inset: 0 320px 0 0; }
.room-view { position: absolute; inset: 0; touch-action: none; }
.room-view canvas { display: block; }
.room-labels { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.views { max-height: calc(100% - 80px); overflow: auto; }
.views .btn { min-width: 64px; }
.views .sep { height: 6px; }

.label {
    position: absolute;
    transform: translate(-50%, -50%);
    white-space: nowrap;
    pointer-events: none;
}
.label.wall {
    background: var(--accent);
    color: #fff;
    border-radius: 999px;
    min-width: 26px;
    height: 26px;
    display: grid;
    place-items: center;
    font-weight: 700;
    font-size: 14px;
    opacity: 0.85;
}
.label.dim {
    background: #fff;
    border: 2px solid var(--blue);
    color: var(--blue);
    border-radius: 6px;
    padding: 1px 6px;
    font-weight: 700;
    font-size: 15px;
    pointer-events: auto;
    cursor: pointer;
}
.label.dim.empty { border-style: dashed; color: var(--muted); border-color: var(--muted); }
.label.dim.selected { background: var(--blue); color: #fff; }

/* Side list */
.side {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 320px;
    background: var(--panel);
    border-left: 1px solid var(--line);
    display: flex;
    flex-direction: column;
}
.side-head { display: flex; justify-content: space-between; padding: 14px 16px; font-weight: 600; border-bottom: 1px solid var(--line); }
.count { color: var(--muted); font-weight: 400; }
.measure-list { overflow: auto; flex: 1; }
.measure-group { padding: 10px 16px 4px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.measure-item {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 2px 8px;
    width: 100%;
    text-align: left;
    padding: 10px 16px;
    border: 0;
    border-bottom: 1px solid var(--line);
    background: none;
    cursor: pointer;
}
.measure-item.selected { background: #e8f1fa; }
.measure-item .what { font-size: 14px; grid-row: 1; grid-column: 1; }
.measure-item .where { font-size: 12px; color: var(--muted); grid-row: 2; grid-column: 1; }
.measure-item .value { grid-row: 1 / span 2; grid-column: 2; align-self: center; font-weight: 700; font-size: 18px; font-variant-numeric: tabular-nums; }
.measure-item .value.empty { color: var(--muted); font-weight: 400; }

/* Keypad */
.keypad {
    position: fixed;
    right: 332px;
    bottom: 12px;
    width: 340px;
    background: var(--panel);
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
    padding: 12px;
    z-index: 30;
}
.keypad[hidden] { display: none; }
.keypad-title { font-size: 13px; color: var(--muted); }
.keypad-display {
    font-size: 36px;
    font-weight: 700;
    text-align: right;
    font-variant-numeric: tabular-nums;
    padding: 4px 8px;
    border-bottom: 2px solid var(--blue);
    margin-bottom: 10px;
    min-height: 54px;
}
.keypad-display::after { content: " mm"; font-size: 16px; color: var(--muted); font-weight: 400; }
.keypad-keys { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.keypad-keys button, .keypad-actions button {
    min-height: 58px;
    border-radius: var(--radius);
    border: 1px solid var(--line);
    background: #faf8f5;
    font-size: 24px;
    cursor: pointer;
}
.keypad-keys button:active { background: var(--line); }
.keypad-actions { display: grid; grid-template-columns: 1fr 1fr 1fr 1.4fr; gap: 8px; margin-top: 8px; }
.keypad-actions button { font-size: 15px; min-height: 50px; }
.keypad-actions .primary { background: var(--blue); color: #fff; border-color: var(--blue); font-weight: 600; }
.keypad-actions .danger { color: #b3261e; }

/* Dialog */
dialog { border: 0; border-radius: 16px; padding: 0; box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3); }
dialog::backdrop { background: rgba(0, 0, 0, 0.35); }
.dialog-form { padding: 20px; display: grid; gap: 14px; min-width: min(380px, 90vw); }
.dialog-form h2 { margin: 0; }
.dialog-form label { display: grid; gap: 4px; font-size: 14px; color: var(--muted); }
.dialog-form input { font: inherit; font-size: 18px; padding: 10px; border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink); }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; }

.toast {
    position: fixed;
    left: 50%;
    top: 72px;
    transform: translateX(-50%);
    background: var(--ink);
    color: #fff;
    padding: 10px 18px;
    border-radius: 999px;
    z-index: 50;
}
.toast[hidden] { display: none; }

/* Narrow screens: list under the room */
@media (max-width: 820px) {
    .room-wrap { inset: 0 0 38% 0; }
    .side { top: auto; height: 38%; width: auto; left: 0; border-left: 0; border-top: 1px solid var(--line); }
    .keypad { right: 12px; width: min(400px, calc(100vw - 24px)); }
    .keypad-keys button { min-height: 52px; }
    .segmented button { padding: 0 10px; }
    .title { display: none; }
}

.label.corner {
    color: var(--ink);
    font-size: 12px;
    font-weight: 700;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 4px;
    padding: 0 4px;
    transform: translate(-50%, 6px);
}
.corner-tag { fill: var(--muted); font-weight: 700; text-anchor: middle; dominant-baseline: central; }