:root {
  --sky: #80b8df;
  --sky-deep: #4e97cf;
  --orange: #d16a38;
  --yellow: #f5bf45;
  --paper: #f7f4ee;
  --card: rgba(247, 244, 238, 0.9);
  --ink: #2453a4;
  --ink-dark: #173d7d;
  --muted: rgba(36, 83, 164, 0.78);
  --seat: #ffffff;
  --seat-border: rgba(36, 83, 164, 0.26);
  --seat-selected: #d16a38;
  --seat-selected-border: #9e4d26;
  --shadow: 0 30px 80px rgba(26, 70, 123, 0.18);
  --seat-size: 24px;
  --seat-gap: 4px;
  --row-number-width: 24px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--ink);
  background: linear-gradient(90deg, var(--sky) 0 57%, #ffffff 57% 100%);
}

.app {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px;
  overflow: hidden;
}

.hall-card {
  position: relative;
  z-index: 1;
  width: min(1380px, 100%);
  padding: 34px;
  border-radius: 30px;
  background: var(--card);
  box-shadow: var(--shadow);
  border: 2px solid rgba(255, 255, 255, 0.45);
  backdrop-filter: blur(10px);
}

.poster-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.shape {
  position: absolute;
  border-radius: 999px;
}

.shape--orange-left {
  width: 320px;
  height: 320px;
  top: -88px;
  left: -72px;
  background: var(--orange);
}

.shape--orange-top {
  display: none;
}

.shape--orange-bottom {
  width: 300px;
  height: 300px;
  left: -86px;
  bottom: -94px;
  background: var(--orange);
}

.shape--yellow-top {
  width: 220px;
  height: 220px;
  top: 210px;
  left: 56%;
  background: rgba(255, 255, 255, 0.88);
}

.shape--yellow-right {
  width: 120px;
  height: 120px;
  top: 300px;
  right: 54px;
  background: rgba(255, 255, 255, 0.72);
}

.shape--yellow-bottom {
  width: 420px;
  height: 420px;
  right: -120px;
  bottom: -190px;
  background: rgba(255, 255, 255, 0.96);
}

.shape--white {
  background: rgba(255, 255, 255, 0.95);
}

.white-1 {
  width: 150px;
  height: 150px;
  top: 88px;
  left: 240px;
}

.white-2 {
  width: 124px;
  height: 124px;
  top: 228px;
  left: 62px;
}

.white-3 {
  width: 134px;
  height: 134px;
  top: 344px;
  left: 108px;
}

.white-4 {
  width: 88px;
  height: 88px;
  top: -16px;
  left: 744px;
}

.shape--diagonal {
  width: 1040px;
  height: 1040px;
  right: -210px;
  top: 38px;
  border-radius: 0;
  background: linear-gradient(140deg, transparent 0 31%, rgba(78, 151, 207, 0.92) 31% 100%);
}

.shape--line {
  left: 0;
  right: 0;
  bottom: 82px;
  height: 18px;
  border-radius: 0;
  background: linear-gradient(90deg, transparent 0 6%, rgba(209, 106, 56, 0.9) 6% 68%, transparent 68% 100%);
}

.hero {
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0 0 10px;
  font-family: "Corki", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: 1.64rem;
  font-weight: 700;
  color: var(--ink);
}

h1 {
  margin: 0;
  font-family: "Corki", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  font-size: clamp(1.35rem, 3.5vw, 2.7rem);
  line-height: 1.05;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.description {
  margin: 16px 0 0;
  max-width: 52ch;
  color: var(--muted);
  line-height: 1.6;
  font-size: 1rem;
}

.hall-panel {
  display: block;
}

.hall-stack {
  display: grid;
  gap: 18px;
}

.zoom-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  border: 2px solid rgba(36, 83, 164, 0.12);
  flex-wrap: wrap;
  flex: 0 1 auto;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.control-group--left {
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
}

.control-group--right {
  justify-content: flex-end;
}

.zoom-button {
  min-width: 54px;
  height: 44px;
  padding: 0 14px;
  border: 2px solid rgba(36, 83, 164, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.84);
  color: var(--ink-dark);
  font: inherit;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.zoom-button:hover,
.zoom-button:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 10px 18px rgba(36, 83, 164, 0.14);
  outline: none;
}

.zoom-button:disabled {
  opacity: 0.45;
  cursor: default;
  transform: none;
  box-shadow: none;
}

.stage {
  margin: 0;
  width: min(520px, 100%);
  justify-self: center;
  padding: 15px 18px;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border-radius: 24px;
  background: var(--ink);
  color: #ffffff;
  box-shadow: 0 14px 30px rgba(36, 83, 164, 0.26);
}

.hall {
  padding: 28px;
  border-radius: 28px;
  overflow: auto;
  border: 3px solid rgba(36, 83, 164, 0.18);
  background:
    linear-gradient(135deg, rgba(128, 184, 223, 0.18) 0 38%, rgba(255, 255, 255, 0) 38% 100%),
    linear-gradient(315deg, rgba(36, 83, 164, 0.08) 0 24%, rgba(255, 255, 255, 0) 24% 100%),
    radial-gradient(circle at 18% 22%, rgba(255, 255, 255, 0.95) 0 38px, rgba(255, 255, 255, 0) 39px),
    radial-gradient(circle at 84% 80%, rgba(209, 106, 56, 0.12) 0 92px, rgba(209, 106, 56, 0) 93px),
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(240, 246, 252, 0.92));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.45);
}

.hall-scrollbar {
  overflow-x: auto;
  overflow-y: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(36, 83, 164, 0.12);
}

.hall-scrollbar-track {
  height: 8px;
}

.hall-viewport {
  position: relative;
  width: fit-content;
  min-width: 100%;
  min-height: 100%;
  margin: 0 auto;
  padding-left: 12px;
  padding-right: 44px;
}

.hall-viewport .seat-grid {
  transform-origin: center top;
  transition: transform 0.18s ease;
}

.seat-grid {
  display: grid;
  gap: calc(28px + var(--seat-size) + var(--seat-gap));
  width: fit-content;
  min-width: 0;
  justify-items: center;
  margin: 0 auto;
}

.upper-sections {
  display: grid;
  gap: 6px;
  align-items: start;
}

.upper-paired-row {
  display: grid;
  grid-template-columns: max-content 92px max-content;
  align-items: center;
  width: max-content;
  position: relative;
  isolation: isolate;
}

.upper-paired-row > .seat-row:first-child {
  transform: translateX(16px);
}

.upper-paired-row > .seat-row:last-child {
  transform: translateX(-16px);
}

.upper-paired-row.row-selected::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: rgba(36, 83, 164, 0.12);
  z-index: 0;
}

.upper-paired-row.upper-paired-row--mid.row-selected::before {
  left: calc((var(--seat-size) + var(--seat-gap)) * 4);
  right: calc((var(--seat-size) + var(--seat-gap)) * 3);
}

.upper-paired-row.upper-paired-row--top.row-selected::before {
  left: calc(var(--seat-size) + var(--seat-gap));
}

.upper-row-gap {
  width: 92px;
  height: 100%;
  position: relative;
  z-index: 1;
  pointer-events: none;
}

.section-block,
.lower-section {
  display: grid;
  gap: 6px;
}

.seat-row {
  display: grid;
  gap: var(--seat-gap);
  align-items: center;
  width: max-content;
  position: relative;
  isolation: isolate;
}

.seat-row.row-selected::before {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 999px;
  background: rgba(36, 83, 164, 0.12);
  z-index: 0;
}

.seat-row.seat-row--spread {
  grid-template-columns:
    var(--row-number-width)
    calc((var(--seat-size) * 27) + (var(--seat-gap) * 26))
    var(--row-number-width);
}

.seat-row.lower-shifted {
  transform: translateX(calc((var(--seat-size) + var(--seat-gap)) / 2));
}

.row-number {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: var(--seat-size);
  font-family: "Corki", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--orange);
  position: relative;
  z-index: 1;
  pointer-events: none;
  user-select: none;
}

.row-number.marker-col-3 {
  transform: translateX(calc((var(--seat-size) + var(--seat-gap)) * 4));
}

.row-number.marker-col-26 {
  transform: translateX(calc((var(--seat-size) + var(--seat-gap)) * -3));
}

.row-number.marker-col-left-top {
  transform: translateX(calc(var(--seat-size) + var(--seat-gap)));
}

.row-number.top-right-after-24 {
  transform: translateX(calc((var(--seat-size) + var(--seat-gap)) * -3));
}

.row-number.overlay-center {
  position: absolute;
  top: 50%;
  left: calc(
    var(--row-number-width) +
    ((var(--seat-size) + var(--seat-gap)) * 17.625) - 1px
  );
  transform: translate(-50%, -50%);
}

.seat {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--seat-size);
  height: var(--seat-size);
  padding: 0;
  border: 1px solid var(--seat-border);
  border-radius: 50%;
  background: var(--seat);
  color: var(--ink-dark);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  position: relative;
  z-index: 3;
  box-shadow: 0 4px 10px rgba(36, 83, 164, 0.08);
}

.seat:hover,
.seat:focus-visible {
  transform: scale(1.08);
  box-shadow: 0 8px 16px rgba(36, 83, 164, 0.18);
  outline: none;
}

.seat.selected {
  border-color: var(--seat-selected-border);
  background: var(--seat-selected);
  color: #ffffff;
  transform: scale(1.5);
  transform-origin: center center;
  text-shadow: none;
  z-index: 1;
  padding-bottom: 2px;
  box-shadow: 0 10px 20px rgba(209, 106, 56, 0.28);
}

.seat.seat--raised-half {
  transform: translateY(-5px);
}

.seat.seat--raised-half.selected {
  transform: translateY(-5px) scale(1.5);
}

.seat-gap {
  width: var(--seat-size);
  height: var(--seat-size);
  position: relative;
  z-index: 1;
}

.seat-spread-track {
  width: calc((var(--seat-size) * 27) + (var(--seat-gap) * 26));
}

.seat-spread-lane {
  display: flex;
  justify-content: space-between;
  width: calc((var(--seat-size) * 21) + (var(--seat-gap) * 20));
  margin-left: calc((var(--seat-size) + var(--seat-gap)) * 1);
}

.legend {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  color: var(--ink);
  flex: 0 0 auto;
}

.summary-label {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink-dark);
  line-height: 1;
}

.summary-pill {
  width: 72px;
  min-width: 72px;
  height: 72px;
  padding: 0;
  border: 2px solid rgba(209, 106, 56, 0.18);
  border-radius: 50%;
  background: var(--yellow);
  color: #ffffff;
  font: inherit;
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  text-align: center;
  cursor: default;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-bottom: 3px;
  -webkit-text-stroke: 0.6px var(--orange);
  text-shadow:
    0.4px 0 0 var(--orange),
    -0.4px 0 0 var(--orange),
    0 0.4px 0 var(--orange),
    0 -0.4px 0 var(--orange);
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.legend-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  display: inline-block;
}

.legend-dot.free {
  background: var(--seat);
  border: 1px solid var(--seat-border);
}

.legend-dot.selected {
  background: var(--seat-selected);
  border: 1px solid var(--seat-selected-border);
}

.actions {
  margin-top: 0;
  flex: 0 0 auto;
}

.summary-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.reset-button {
  width: auto;
  padding: 8px 14px;
  border: 2px solid rgba(36, 83, 164, 0.16);
  border-radius: 999px;
  background: linear-gradient(180deg, #ffffff, #f0f5fb);
  color: var(--ink-dark);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.reset-button:hover,
.reset-button:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 10px 18px rgba(36, 83, 164, 0.14);
  outline: none;
}

.summary {
  margin: 0;
}

@media (max-width: 960px) {
  .hall {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-x pan-y pinch-zoom;
  }

  .zoom-controls {
    border-radius: 26px;
    justify-content: center;
  }

}

@media (max-width: 640px) {
  :root {
    --seat-size: 18px;
    --seat-gap: 3px;
  }

  .app {
    padding: 18px;
  }

  .hall-card {
    padding: 20px;
  }

  .hall {
    padding: 18px;
  }

  .upper-sections {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .shape--line,
  .white-4,
  .shape--orange-top {
    display: none;
  }

  .zoom-button {
    min-width: 50px;
    height: 40px;
  }

  .upper-paired-row > .seat-row:first-child {
    transform: translateX(23px);
  }

  .upper-paired-row > .seat-row:last-child {
    transform: translateX(-23px);
  }

  .seat {
    font-size: 0.62rem;
  }

  .summary {
    text-align: center;
  }

  .reset-button {
    width: 100%;
  }

  .zoom-controls {
    display: grid;
    justify-items: center;
    text-align: center;
    border-radius: 24px;
    width: 100%;
  }

  .control-group {
    justify-content: center;
  }

  .control-group--left {
    align-items: center;
  }
}