* { box-sizing: border-box; }
:root {
  --bg: #0b0d10;
  --panel: #131720;
  --text: #e6edf3;
  --muted: #a0a7b4;
  --accent: #4aa3ff;
  --accent-2: #7bd88f;
  --danger: #ff6b6b;
  --border: #263040;
  --suggest-hover: #1a2130;
  --cell-bg: #121723;
  --cell-hover-bg: #182338;
  --tooltip-bg: rgba(19,23,32,0.96);
}
:root[data-theme="light"] {
  --bg: #f7f9fc;
  --panel: #ffffff;
  --text: #0b1220;
  --muted: #58637a;
  --accent: #1e66f5;
  --accent-2: #16a34a;
  --danger: #dc3545;
  --border: #d6dbe6;
  --suggest-hover: #eef2fb;
  --cell-bg: #ffffff;
  --cell-hover-bg: #eef2fb;
  --tooltip-bg: rgba(255,255,255,0.98);
}
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, Apple Color Emoji, Segoe UI Emoji;
  color: var(--text);
  background: var(--bg);
}
.topbar {
  /* was: position: sticky; top: 0; z-index: 10; */
  position: static;
  backdrop-filter: blur(8px);
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px;
}
.brand { font-weight: 700; letter-spacing: 0.3px; }
.controls { display: flex; gap: 8px; align-items: center; }
.controls input[type="datetime-local"], .controls input[type="checkbox"], .controls select {
  background: var(--panel); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px; padding: 6px 8px;
}
.controls label.hover-toggle { display: inline-flex; gap: 6px; align-items: center; padding: 4px 8px; border: 1px solid var(--border); border-radius: 6px; background: var(--panel); cursor: pointer; }
.controls button {
  background: var(--accent); color: #08111f; font-weight: 700;
  border: none; border-radius: 6px; padding: 8px 12px; cursor: pointer;
}
.container { max-width: 980px; margin: 0 auto; padding: 16px; }
.add-zone { display: flex; gap: 8px; position: relative; }
.add-zone input {
  flex: 1; background: var(--panel); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px;
}
.add-zone button {
  background: var(--accent-2); color: #042612; font-weight: 700; border: none; border-radius: 8px; padding: 10px 14px; cursor: pointer;
}
.suggestions {
  position: absolute; top: 44px; left: 0; right: 96px; max-height: 220px; overflow: auto;
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px; display: none;
}
.suggestions.show { display: block; }
.suggestions div { padding: 8px 12px; cursor: pointer; }
.suggestions div:hover { background: var(--suggest-hover); }
.grid { display: grid; grid-template-columns: 2fr 3fr; gap: 8px; align-items: center; padding: 10px 12px; border-bottom: 1px solid var(--border); }
#gridHeader { color: var(--muted); text-transform: uppercase; font-size: 12px; letter-spacing: 0.6px; }
.row { display: contents; }
.col { padding: 8px 4px; }
.col-zone { font-weight: 600; }
.badge { font-size: 12px; color: var(--muted); }
.tag { display: inline-block; padding: 2px 6px; border: 1px solid var(--border); border-radius: 999px; font-size: 12px; color: var(--muted);
  margin-left: 6px; }
.remove-btn { background: transparent; border: none; color: var(--danger); cursor: pointer; font-size: 18px; line-height: 1; padding: 0 4px; }
.footer { color: var(--muted); padding: 24px; text-align: center; }

/* Rows wrapper and vertical guide for synchronized hover */
.rows-wrap { position: relative; }
.col-guide {
  position: absolute;
  top: 0; bottom: 0; width: 2px;
  background: linear-gradient(to bottom, rgba(74,163,255,0.0), rgba(74,163,255,0.9) 20%, rgba(74,163,255,0.9) 80%, rgba(74,163,255,0.0));
  box-shadow: 0 0 0 1px rgba(74,163,255,0.25);
  opacity: 0; pointer-events: none;
}
.col-guide.show { opacity: 0.9; }

/* Time column — timeline track and preview */
.col-time .time-line { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.col-time .time-main { display: inline-flex; align-items: center; gap: 6px; }
.col-time .time-text { display: inline-block; }
.day-night { font-size: 14px; line-height: 1; }
.col-time .preview { display: block; font-size: 12px; color: var(--muted); margin-top: 2px; min-height: 16px; }
/* New hourly grid */
.col-time .hour-grid {
  margin-top: 6px;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}
.col-time .hour-cell {
  user-select: none;
  text-align: center;
  font-size: 12px;
  padding: 6px 4px;
  border: 1px solid var(--border);
  background: var(--cell-bg);
  color: var(--text);
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}
.col-time .hour-cell.center-selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(74,163,255,0.2);
}
.col-time .hour-cell:hover {
  background: var(--cell-hover-bg);
  border-color: #355074;
}
.col-time .hour-cell.highlight {
  outline: 2px solid var(--accent);
  background: rgba(74,163,255,0.15);
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(74,163,255,0.15);
}

.hover-tooltip {
  position: fixed;
  z-index: 1000;
  pointer-events: none;
  background: var(--tooltip-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 8px;
  color: var(--text);
  font-size: 12px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.35);
  display: none;
}
.hover-tooltip.show { display: block; }

@media (max-width: 680px){ .grid { grid-template-columns: 1.2fr 1.8fr; } }


/* Theme variables (corrected :root) appended for reliability */
:root {
  --bg: #0b0d10;
  --panel: #131720;
  --text: #e6edf3;
  --muted: #a0a7b4;
  --accent: #4aa3ff;
  --accent-2: #7bd88f;
  --danger: #ff6b6b;
  --border: #263040;
  --suggest-hover: #1a2130;
  --cell-bg: #121723;
  --cell-hover-bg: #182338;
  --tooltip-bg: rgba(19,23,32,0.96);
}
:root[data-theme="light"] {
  --bg: #f7f9fc;
  --panel: #ffffff;
  --text: #0b1220;
  --muted: #58637a;
  --accent: #1e66f5;
  --accent-2: #16a34a;
  --danger: #dc3545;
  --border: #d6dbe6;
  --suggest-hover: #eef2fb;
  --cell-bg: #ffffff;
  --cell-hover-bg: #eef2fb;
  --tooltip-bg: rgba(255,255,255,0.98);
}


/* Fallback theme variables using html selector for broader support */
html {
  --bg: #0b0d10;
  --panel: #131720;
  --text: #e6edf3;
  --muted: #a0a7b4;
  --accent: #4aa3ff;
  --accent-2: #7bd88f;
  --danger: #ff6b6b;
  --border: #263040;
  --suggest-hover: #1a2130;
  --cell-bg: #121723;
  --cell-hover-bg: #182338;
  --tooltip-bg: rgba(19,23,32,0.96);
}
html[data-theme="light"] {
  --bg: #f7f9fc;
  --panel: #ffffff;
  --text: #0b1220;
  --muted: #58637a;
  --accent: #1e66f5;
  --accent-2: #16a34a;
  --danger: #dc3545;
  --border: #d6dbe6;
  --suggest-hover: #eef2fb;
  --cell-bg: #ffffff;
  --cell-hover-bg: #eef2fb;
  --tooltip-bg: rgba(255,255,255,0.98);
}


/* FAQ / How-To area */
.faq {
  margin-top: 16px;
  color: var(--text);
  text-align: left;
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
}
.faq h2 {
  margin: 8px 0;
  font-size: 16px;
  font-weight: 700;
  text-transform: none;
  letter-spacing: 0.2px;
  color: var(--text);
}
#faqBox {
  width: 100%;
  min-height: 440px;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, Apple Color Emoji, Segoe UI Emoji;
  font-size: 13px;
  line-height: 1.5;
  resize: none;
}
#faqBox:read-only { outline: none; }