:root {
  --bg-start: #f8fbf6;
  --bg-end: #edf4ff;
  --surface: rgba(255, 255, 255, 0.86);
  --text: #13203b;
  --muted: #5a6c88;
  --accent: #1a6ad9;
  --ok-bg: #e8f7ef;
  --ok-border: #58ae7d;
  --bad-bg: #f4ecec;
  --bad-border: #b58888;
  --shadow: 0 8px 24px rgba(15, 30, 70, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Trebuchet MS", sans-serif;
  color: var(--text);
  background: linear-gradient(145deg, var(--bg-start), var(--bg-end));
  min-height: 100vh;
}

.app-shell {
  width: min(1080px, calc(100% - 2rem));
  margin: 1.2rem auto 2.4rem;
  display: grid;
  gap: 1rem;
}

.hero {
  background: var(--surface);
  border-radius: 16px;
  padding: 1.2rem;
  box-shadow: var(--shadow);
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.3rem, 2.5vw, 1.9rem);
}

.hero p {
  margin: 0.45rem 0 0;
  color: var(--muted);
}

.ad-slot {
  border: 1px dashed #90a1bb;
  background: rgba(255, 255, 255, 0.45);
  border-radius: 12px;
  min-height: 88px;
  display: grid;
  place-items: center;
}

.ad-label {
  color: var(--muted);
  font-size: 0.92rem;
}

.controls {
  background: var(--surface);
  border-radius: 16px;
  padding: 1rem;
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 0.8rem;
  align-items: end;
}

.field-group {
  display: grid;
  gap: 0.35rem;
  grid-column: span 3;
}

.field-group-wide {
  grid-column: span 6;
}

label {
  font-size: 0.86rem;
  color: var(--muted);
}

input,
select,
button {
  font: inherit;
}

input[type="date"],
input[list],
select {
  width: 100%;
  border: 1px solid #bdcade;
  border-radius: 10px;
  padding: 0.55rem 0.7rem;
  background: #fff;
}

.primary-btn {
  grid-column: span 2;
  border: none;
  border-radius: 10px;
  padding: 0.6rem 0.8rem;
  color: #fff;
  background: linear-gradient(130deg, #0d68d4, #2288ff);
  cursor: pointer;
}

.meeting-date-display {
  grid-column: span 10;
  color: var(--muted);
  font-size: 0.85rem;
}

.primary-btn:hover {
  filter: brightness(1.04);
}

.overlap-panel {
  background: var(--surface);
  box-shadow: var(--shadow);
  border-radius: 14px;
  padding: 0.8rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.overlap-label {
  color: var(--muted);
  font-size: 0.92rem;
}

.badge {
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.84rem;
  font-weight: 600;
}

.badge-pending {
  background: #e9eef6;
  color: #385171;
}

.badge-good {
  background: #daf3df;
  color: #1a6d37;
}

.badge-bad {
  background: #f5e4e4;
  color: #7f2c2c;
}

.cards {
  display: grid;
  gap: 0.8rem;
}

.card {
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 0.9rem 1rem;
  border: 1px solid transparent;
  transition: background-color 120ms ease, border-color 120ms ease;
}

.card.in-core {
  background: var(--ok-bg);
  border-color: var(--ok-border);
}

.card.out-core {
  background: var(--bad-bg);
  border-color: var(--bad-border);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.zone-meta {
  display: grid;
  gap: 0.2rem;
}

.zone-name {
  font-weight: 700;
}

.zone-offset {
  color: var(--muted);
  font-size: 0.85rem;
}

.remove-btn {
  border: 1px solid #c4d1e2;
  border-radius: 9px;
  padding: 0.35rem 0.65rem;
  background: #fff;
  color: #384b6a;
  cursor: pointer;
}

.remove-btn[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
}

.time-readout {
  margin: 0.65rem 0;
  font-weight: 700;
  font-size: 1.13rem;
}

.slider-wrap {
  display: grid;
  gap: 0.45rem;
}

.slider-stage {
  position: relative;
  padding: 0.2rem 0;
}

.slider-track {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 6px;
  transform: translateY(-50%);
  border-radius: 999px;
  background: linear-gradient(90deg, #cfd9e8, #bccbe2);
  z-index: 1;
  pointer-events: none;
}

.slider-label {
  color: var(--muted);
  font-size: 0.84rem;
}

input[type="range"] {
  width: 100%;
  appearance: none;
  background: transparent;
  position: relative;
  z-index: 3;
  --slider-thumb-width: 14px;
  --slider-thumb-height: 18px;
}

.duration-bar {
  position: absolute;
  left: 0;
  top: 50%;
  height: 16px;
  transform: translateY(-50%);
  border-radius: 4px;
  border: 1px solid #1c4f94;
  background: linear-gradient(180deg, #2a7fe9, #1a63bf);
  box-shadow: 0 1px 4px rgba(15, 44, 98, 0.22);
  pointer-events: none;
  z-index: 2;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 6px;
  background: transparent;
}

input[type="range"]::-moz-range-track {
  height: 6px;
  background: transparent;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: var(--slider-thumb-width);
  height: var(--slider-thumb-height);
  border-radius: 4px;
  border: 1px solid #1c4f94;
  background: #ffffff;
  margin-top: calc((6px - var(--slider-thumb-height)) / 2);
  box-shadow: 0 1px 4px rgba(15, 44, 98, 0.28);
}

input[type="range"]::-moz-range-thumb {
  width: var(--slider-thumb-width);
  height: var(--slider-thumb-height);
  border-radius: 4px;
  border: 1px solid #1c4f94;
  background: #ffffff;
  box-shadow: 0 1px 4px rgba(15, 44, 98, 0.28);
}

.hour-marks {
  position: relative;
  height: 1.6rem;
  margin-top: 0.1rem;
}

.hour-mark {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  text-align: center;
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
}

.hour-mark::before {
  content: "";
  display: block;
  width: 2px;
  height: 10px;
  margin: 0 auto 0.15rem;
  background: #96adcd;
}

.hour-mark.hour-mark-in {
  color: #1d7f42;
}

.hour-mark.hour-mark-in::before {
  background: #59a978;
}

.hour-mark.hour-mark-out {
  color: #8b2f2f;
}

.hour-mark.hour-mark-out::before {
  background: #bc6666;
}

.core-hours {
  margin-top: 0.6rem;
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.core-hours .field-group {
  grid-column: unset;
  width: min(220px, 100%);
}

@media (max-width: 780px) {
  .field-group,
  .field-group-wide,
  .primary-btn {
    grid-column: span 12;
  }
}