:root {
  --bg-deep: #28074a;
  --panel-dark: #491088;
  --panel-mid: #6c1dd0;
  --accent-main: #bd4de5;
  --accent-hot: #ff19db;
  --accent-warm: #ff7f1a;
  --text-main: #f9f4ff;
  --text-muted: rgba(249, 244, 255, 0.72);
  --border-soft: rgba(255, 255, 255, 0.12);
  --shadow-soft: 0 18px 40px rgba(17, 3, 33, 0.32);
  --shadow-strong: 0 12px 24px rgba(8, 0, 18, 0.34);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text-main);
  background:
    radial-gradient(circle at top right, rgba(255, 25, 219, 0.22), transparent 28%),
    radial-gradient(circle at bottom left, rgba(255, 127, 26, 0.2), transparent 30%),
    linear-gradient(180deg, #1b0531 0%, var(--bg-deep) 38%, #140223 100%);
}

.app-shell {
  width: min(100%, 460px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 24px 18px 32px;
}

.app-header {
  padding: 24px 20px;
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  background: linear-gradient(145deg, rgba(108, 29, 208, 0.95), rgba(40, 7, 74, 0.96));
  box-shadow: var(--shadow-soft);
}

.app-subtitle {
  margin: 0 0 8px;
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--text-muted);
}

.app-header h1 {
  margin: 0;
  font-size: 1.9rem;
  line-height: 1.15;
}

.control-sections {
  display: grid;
  gap: 18px;
  margin-top: 20px;
}

.control-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px;
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(73, 16, 136, 0.96), rgba(40, 7, 74, 0.98));
  box-shadow: var(--shadow-soft);
}

.section-heading {
  width: 100%;
  margin-bottom: 22px;
  text-align: center;
}

.section-heading h2 {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin: 0 0 10px;
  font-size: 1.3rem;
}

.section-heading h2 i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(255, 25, 219, 0.24), rgba(255, 127, 26, 0.26));
  color: var(--accent-main);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.section-heading p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.5;
}

.button-group {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.button-group button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 14px 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  background: linear-gradient(135deg, var(--panel-mid), var(--panel-dark));
  color: var(--text-main);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-strong);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease,
    background 0.18s ease;
  position: relative;
  isolation: isolate;
}

.button-group button i {
  color: var(--accent-hot);
  font-size: 1rem;
}

.button-group button::after {
  content: "";
  position: absolute;
  inset: -8px;
  z-index: -1;
  border-radius: 12px;
  background: radial-gradient(circle, rgba(255, 25, 219, 0.34) 0%, rgba(255, 25, 219, 0.16) 42%, transparent 72%);
  opacity: 0;
  transform: scale(0.92);
  filter: blur(12px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.button-group button:hover,
.button-group button:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(255, 127, 26, 0.45);
  background: linear-gradient(135deg, var(--accent-main), var(--panel-mid));
  box-shadow: 0 16px 28px rgba(11, 1, 22, 0.4);
  outline: none;
}

.button-group button:active {
  transform: translateY(0);
  box-shadow:
    0 10px 18px rgba(11, 1, 22, 0.28),
    0 0 22px rgba(255, 25, 219, 0.28);
}

.button-group button:active::after {
  opacity: 1;
  transform: scale(1);
}

#lighting-section .section-heading h2 i {
  color: #ffdf7d;
}

.switch-control {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 16px;
  padding: 18px 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(108, 29, 208, 0.92), rgba(73, 16, 136, 0.96));
  box-shadow: var(--shadow-strong);
  cursor: pointer;
}

.switch-copy {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  font-weight: 600;
}

.switch-copy i {
  color: #ffdf7d;
  font-size: 1rem;
}

.switch-control input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.switch-slider {
  position: relative;
  flex-shrink: 0;
  width: 58px;
  height: 32px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(40, 7, 74, 0.9), rgba(73, 16, 136, 0.92));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
  transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.switch-slider::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, #fef4b5, #ff7f1a);
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.28);
  transition: transform 0.2s ease;
}

.switch-control input:checked + .switch-slider {
  border-color: rgba(255, 127, 26, 0.55);
  background: linear-gradient(135deg, var(--accent-main), var(--accent-hot));
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.06), 0 10px 20px rgba(255, 25, 219, 0.2);
}

.switch-control input:checked + .switch-slider::before {
  transform: translateX(26px);
}

.switch-control:focus-within {
  border-color: rgba(255, 127, 26, 0.45);
  box-shadow: 0 16px 28px rgba(11, 1, 22, 0.4);
}

.switch-control input:focus-visible + .switch-slider {
  outline: 2px solid rgba(255, 127, 26, 0.75);
  outline-offset: 2px;
}

#temperature-section .section-heading h2 i,
#temperature-section .button-group button i {
  color: #ff7f1a;
}

.temperature-display {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 8px;
  width: 100%;
  margin-bottom: 18px;
  padding: 20px 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(255, 127, 26, 0.2), rgba(189, 77, 229, 0.18));
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.04),
    0 14px 28px rgba(19, 3, 36, 0.26);
}

.temperature-value {
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1;
  color: #fff1de;
  text-shadow: 0 0 18px rgba(255, 127, 26, 0.28);
}

.temperature-unit {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffd0a4;
}

.temperature-buttons {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.temperature-buttons button {
  min-height: 60px;
}

.temp-button-symbol {
  min-width: 18px;
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1;
  color: #ffb167;
}

#music-section .section-heading h2 i,
#music-section .button-group button i {
  color: #ff19db;
}

.song-display {
  width: 100%;
  margin-bottom: 18px;
  padding: 18px 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(255, 25, 219, 0.16), rgba(108, 29, 208, 0.2));
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.04),
    0 14px 28px rgba(19, 3, 36, 0.26);
  text-align: center;
}

.song-label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(249, 244, 255, 0.68);
}

.song-title {
  margin: 0;
  min-height: 52px;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.35;
  color: #ffe4fb;
  text-shadow: 0 0 18px rgba(255, 25, 219, 0.2);
}

.music-buttons {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.music-buttons button {
  min-height: 60px;
}

.music-button-symbol {
  min-width: 18px;
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1;
  color: #ff8ded;
}

@media (min-width: 640px) {
  .app-shell {
    width: min(100%, 720px);
    padding: 32px 24px 40px;
  }

  .control-sections {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  #music-section {
    grid-column: 1 / -1;
  }
}

@media (max-width: 359px) {
  .button-group {
    grid-template-columns: 1fr;
  }

  .music-buttons {
    grid-template-columns: 1fr;
  }

  .app-header h1 {
    font-size: 1.6rem;
  }
}