:root {
  --bg: #ffffff;
  --text: #141414;
  --muted: #5f6368;
  --border: #dadce0;
  --zone-bg: #f8f9fb;
  --panel-bg: #fbfcff;
  --shadow: 0 10px 25px rgba(22, 28, 45, 0.07);
  --tier-height: 124px;
  --radius: 14px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
}

body {
  font-family: "Space Grotesk", sans-serif;
}

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.top-nav {
  height: 72px;
  padding: 0 24px;
  border-bottom: 1px solid var(--border);
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  margin: 0;
  font-size: clamp(1.4rem, 2.7vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  background: linear-gradient(
    90deg,
    #ff3d3d 0%,
    #ff933d 16%,
    #ffd63d 32%,
    #4ecf63 48%,
    #3db7ff 64%,
    #6d67ff 80%,
    #be58ff 100%
  );
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.status-group {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #ffffff;
  white-space: nowrap;
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  display: inline-block;
}

.status-connected {
  background: #30c05a;
}

.status-connecting {
  background: #4a88ff;
}

.status-reconnecting {
  background: #ff9f43;
}

.status-offline {
  background: #8b9098;
}

.connection-status {
  font-size: 0.88rem;
  color: #39424e;
}

.settings-popunder-wrap {
  position: relative;
}

.settings-icon-button {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: #344156;
  display: grid;
  place-items: center;
  cursor: pointer;
}

.settings-icon-button:hover {
  background: #f4f7fb;
}

.settings-icon-button[aria-expanded="true"] {
  border-color: #4a88ff;
  color: #1f5ed6;
  background: #eff5ff;
}

.settings-popunder {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  z-index: 12;
  width: min(350px, calc(100vw - 24px));
  border: 1px solid #ccd4de;
  border-radius: 14px;
  background: #ffffff;
  box-shadow: 0 16px 32px rgba(16, 26, 41, 0.14);
  padding: 14px;
}

.settings-popunder.hidden {
  display: none;
}

.settings-popunder h2 {
  margin: 0 0 10px;
  font-size: 1rem;
  font-weight: 700;
}

.layout {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 390px);
  gap: 18px;
  padding: 18px;
}

.tier-board {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.tier-row {
  min-height: var(--tier-height);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  background: #ffffff;
}

.tier-label {
  font-size: 2rem;
  font-weight: 700;
  display: grid;
  place-items: center;
  color: #101010;
}

.tier-s {
  background: #ff6f6f;
}

.tier-a {
  background: #ff9f4b;
}

.tier-b {
  background: #ffd35b;
}

.tier-c {
  background: #90db73;
}

.tier-d {
  background: #71d6c6;
}

.tier-f {
  background: #73a4ff;
}

.drop-zone {
  position: relative;
  min-height: var(--tier-height);
  padding: 10px;
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 10px;
  background: var(--zone-bg);
  transition: box-shadow 0.16s ease, background-color 0.16s ease;
}

.drop-zone.is-empty::before {
  content: attr(data-empty-text);
  color: #7a828d;
  font-size: 0.88rem;
  align-self: center;
}

.drop-zone.drag-over {
  background: #eef4ff;
  box-shadow: inset 0 0 0 2px #4a88ff;
}

.right-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel-bg);
  box-shadow: var(--shadow);
  padding: 14px;
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 1.05rem;
  font-weight: 700;
}

.settings-form {
  display: grid;
  gap: 10px;
}

.settings-form label {
  font-size: 0.88rem;
  color: #2d3542;
}

.slider-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.slider-value {
  font-family: "IBM Plex Mono", monospace;
  font-weight: 700;
  font-size: 0.9rem;
  color: #1c4fae;
}

.settings-form input {
  width: 100%;
  border: 1px solid #c8ced8;
  border-radius: 10px;
  padding: 10px 11px;
  font: inherit;
  background: #ffffff;
}

.settings-form input[type="range"] {
  padding: 0;
  border: 0;
  border-radius: 0;
  height: 20px;
  background: transparent;
  accent-color: #2373ff;
}

.channel-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.channel-row button,
.startup-card button {
  border: 1px solid #1d67e5;
  background: #2373ff;
  color: #ffffff;
  border-radius: 10px;
  padding: 0 14px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.channel-row button:hover,
.startup-card button:hover {
  background: #1d67e5;
}

.channel-row button.is-disconnect {
  border-color: #c62828;
  background: #e53935;
}

.channel-row button.is-disconnect:hover {
  background: #c62828;
}

.settings-note {
  margin: 0;
  font-size: 0.84rem;
  color: var(--muted);
}

.pool-panel {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.pool-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.pool-header h2 {
  margin: 0;
}

.pool-count {
  border: 1px solid var(--border);
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.88rem;
  background: #ffffff;
}

.pool-zone {
  min-height: 360px;
  flex: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-content: start;
}

.pool-zone .color-card {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  min-width: 0;
}

.pool-zone.is-empty::before {
  grid-column: 1 / -1;
  align-self: center;
}

.color-card {
  width: 112px;
  height: 112px;
  border-radius: 13px;
  border: 1px solid rgba(0, 0, 0, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  cursor: grab;
  user-select: none;
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.13);
  text-align: center;
}

.color-card:active {
  cursor: grabbing;
}

.color-card.is-dragging {
  opacity: 0.32;
}

.color-hex {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 0 8px;
}

.color-chatter {
  position: absolute;
  left: 7px;
  right: 7px;
  bottom: 6px;
  font-size: 0.72rem;
  font-style: italic;
  opacity: 0.6;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.drag-image {
  transform: scale(1.03);
  box-shadow: 0 16px 24px rgba(0, 0, 0, 0.2);
}

.startup-overlay {
  position: fixed;
  inset: 0;
  z-index: 18;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(2px);
  display: grid;
  place-items: center;
}

.startup-overlay.hidden {
  display: none;
}

.startup-card {
  width: min(430px, calc(100vw - 30px));
  border: 1px solid #ccd2dc;
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 18px 42px rgba(15, 28, 46, 0.13);
  padding: 20px;
  display: grid;
  gap: 11px;
}

.startup-card h2 {
  margin: 0;
  font-size: 1.25rem;
}

.startup-card p {
  margin: 0;
  color: #4f5664;
  line-height: 1.4;
}

.startup-card input {
  border: 1px solid #c8ced8;
  border-radius: 10px;
  padding: 10px 11px;
  font: inherit;
}

.startup-card button {
  height: 42px;
}

@media (max-width: 1080px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .pool-zone {
    min-height: 280px;
  }
}

@media (max-width: 700px) {
  .top-nav {
    padding: 0 12px;
    height: auto;
    min-height: 72px;
    gap: 8px;
    flex-wrap: wrap;
    align-content: center;
  }

  .nav-controls {
    margin-left: auto;
  }

  .settings-popunder {
    right: -2px;
    width: min(350px, calc(100vw - 18px));
  }

  .layout {
    padding: 12px;
    gap: 12px;
  }

  .tier-row {
    grid-template-columns: 58px minmax(0, 1fr);
  }

  .tier-label {
    font-size: 1.5rem;
  }

  .color-card {
    width: 98px;
    height: 98px;
  }
}