:root {
  color-scheme: dark;
  --background: #10120f;
  --surface: #191c18;
  --surface-soft: #20241f;
  --line: #33382f;
  --text: #f3f5ed;
  --muted: #a8afa2;
  --accent: #d6ff68;
  --accent-dark: #151d05;
  --warning: #ffce73;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% 0%, rgba(214, 255, 104, 0.09), transparent 30%),
    var(--background);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

button {
  font: inherit;
}

.timer-app {
  width: min(1100px, calc(100% - 40px));
  margin: 0 auto;
  padding: 48px 0;
}

.app-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.eyebrow,
.card-label {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.18em;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 0;
  font-size: clamp(2rem, 5vw, 4.5rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.sound-toggle {
  flex: 0 0 auto;
  padding: 11px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

.sound-toggle:hover {
  border-color: var(--accent);
}

.timer-card {
  display: grid;
  place-items: center;
  min-height: 490px;
  padding: 40px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.025), transparent 50%),
    var(--surface);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.25);
}

.timer-visual {
  position: relative;
  width: min(310px, 78vw);
  aspect-ratio: 1;
}

.progress-ring {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.progress-ring circle {
  fill: none;
  stroke-width: 7;
}

.progress-track {
  stroke: var(--surface-soft);
}

.progress-value {
  stroke: var(--accent);
  stroke-linecap: round;
  transition: stroke-dashoffset 0.35s linear;
}

.time-display {
  position: absolute;
  inset: 0;
  display: grid;
  align-content: center;
  justify-items: center;
}

.time {
  font-size: clamp(3.5rem, 9vw, 6rem);
  font-weight: 760;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.07em;
  line-height: 1;
}

.time-label {
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.controls {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.button {
  min-width: 132px;
  padding: 14px 22px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-weight: 750;
  cursor: pointer;
}

.button-primary {
  background: var(--accent);
  color: var(--accent-dark);
}

.button-primary:hover {
  background: #e1ff91;
}

.button-secondary {
  border-color: var(--line);
  background: transparent;
  color: var(--text);
}

.button-secondary:hover {
  border-color: var(--muted);
}

.session-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 20px;
  margin-top: 20px;
}

.section-card,
.announcement-card {
  min-height: 205px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
}

.section-card {
  display: flex;
  gap: 22px;
  transition:
    border-color 0.25s ease,
    background 0.25s ease;
}

.section-card.active {
  border-color: rgba(214, 255, 104, 0.45);
}

.section-card.section-two {
  border-color: rgba(255, 206, 115, 0.5);
  background: linear-gradient(
    135deg,
    rgba(255, 206, 115, 0.1),
    var(--surface) 60%
  );
}

.section-number {
  color: var(--accent);
  font-size: 2.6rem;
  font-weight: 850;
  line-height: 1;
}

.section-card h2,
.announcement-card h2 {
  margin-bottom: 8px;
  font-size: 1.35rem;
}

.section-card p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.55;
}

.announcement-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.live-indicator {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(214, 255, 104, 0.08);
}

.announcement-list {
  display: grid;
  gap: 9px;
  max-height: 100px;
  margin: 14px 0 0;
  padding-left: 21px;
  overflow-y: auto;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}

.announcement-list li:first-child {
  color: var(--text);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

button:focus-visible {
  outline: 3px solid rgba(214, 255, 104, 0.45);
  outline-offset: 3px;
}

@media (max-width: 720px) {
  .timer-app {
    width: min(100% - 24px, 600px);
    padding: 28px 0;
  }

  .app-header {
    align-items: flex-start;
  }

  .sound-toggle {
    font-size: 0;
  }

  .sound-toggle span {
    font-size: 1rem;
  }

  .timer-card {
    min-height: 430px;
    padding: 28px 18px;
  }

  .session-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}