:root {
  --bg: #07131d;
  --bg-deep: #03080c;
  --panel: rgba(7, 28, 43, 0.76);
  --panel-strong: rgba(7, 28, 43, 0.92);
  --text: #eaf6fb;
  --muted: #a9c0cc;
  --accent: #7ef0d2;
  --accent-strong: #39c3df;
  --warn: #ffd48f;
  --line: rgba(126, 240, 210, 0.16);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(57, 195, 223, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(126, 240, 210, 0.12), transparent 22%),
    linear-gradient(180deg, #0b2233 0%, var(--bg) 48%, var(--bg-deep) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 100% 42px, 42px 100%;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.8), transparent);
}

.shell {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.5rem;
  align-items: stretch;
  margin-bottom: 1.5rem;
}

.hero__copy,
.hero__card,
.panel,
.tabs {
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero__copy,
.panel {
  padding: 1.5rem;
  border-radius: 28px;
  background: var(--panel);
  backdrop-filter: blur(16px);
}

.hero__card,
.tabs {
  background: rgba(4, 18, 29, 0.7);
  backdrop-filter: blur(18px);
}

.hero__copy h1,
.panel h2,
.panel h3 {
  font-family: "Space Grotesk", sans-serif;
  margin: 0;
}

.hero__copy h1 {
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  line-height: 0.95;
  max-width: 9ch;
}

.hero__lede,
.panel p,
label,
select,
input,
button {
  font-size: 1rem;
}

.hero__lede,
.panel p {
  color: var(--muted);
  line-height: 1.6;
}

.eyebrow {
  margin: 0 0 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.77rem;
  color: var(--accent);
}

.hero__actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

.button {
  border: 0;
  border-radius: 999px;
  padding: 0.95rem 1.2rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, opacity 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #03222a;
}

.button--ghost {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.hero__card {
  border-radius: 28px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero__metric {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.hero__metric span {
  color: var(--muted);
}

.hero__metric strong {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.1rem;
}

.hero__session-ring {
  display: grid;
  place-items: center;
  text-align: center;
  gap: 1rem;
}

.ring {
  width: 180px;
  aspect-ratio: 1;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle, rgba(7, 19, 29, 0.95) 56%, transparent 58%),
    conic-gradient(from 180deg, var(--accent), rgba(57, 195, 223, 0.25), var(--accent));
  box-shadow: inset 0 0 30px rgba(126, 240, 210, 0.18);
}

.ring span {
  font-family: "Space Grotesk", sans-serif;
  font-size: 2rem;
  font-weight: 700;
}

.tabs {
  position: sticky;
  top: 0.75rem;
  z-index: 3;
  display: flex;
  gap: 0.5rem;
  padding: 0.5rem;
  border-radius: 999px;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.tab {
  background: transparent;
  color: var(--muted);
  border: 0;
  border-radius: 999px;
  padding: 0.85rem 1rem;
  white-space: nowrap;
  cursor: pointer;
}

.tab.is-active {
  background: rgba(126, 240, 210, 0.12);
  color: var(--text);
}

.screen {
  display: none;
  animation: rise 220ms ease;
}

.screen.is-active {
  display: block;
}

.grid {
  display: grid;
  gap: 1.25rem;
}

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

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

.panel--feature {
  background:
    linear-gradient(160deg, rgba(126, 240, 210, 0.08), transparent 36%),
    var(--panel-strong);
}

.panel--wide {
  width: 100%;
}

.panel__header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: start;
}

.pill {
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font-size: 0.86rem;
}

.pill--warn {
  background: rgba(255, 212, 143, 0.16);
  color: var(--warn);
}

.chips,
.stack,
.safety-list {
  display: grid;
  gap: 0.8rem;
}

.chip,
.stack__item {
  border-radius: 18px;
  padding: 0.85rem 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.stack__item {
  cursor: pointer;
}

.stack__item.is-selected {
  border-color: rgba(126, 240, 210, 0.42);
  background: rgba(126, 240, 210, 0.09);
}

.stack__item strong,
.toggle-card strong {
  display: block;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1rem;
}

.stack__meta,
.toggle-card__label {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.form label {
  display: grid;
  gap: 0.55rem;
  color: var(--text);
}

.form button {
  align-self: end;
}

select,
input {
  width: 100%;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  padding: 0.9rem 1rem;
}

.session-display {
  padding: 1.5rem;
  border-radius: 24px;
  margin-top: 1.2rem;
  background:
    radial-gradient(circle at top, rgba(126, 240, 210, 0.14), transparent 40%),
    rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
}

.session-display--storm {
  background:
    radial-gradient(circle at top, rgba(57, 195, 223, 0.22), transparent 42%),
    linear-gradient(180deg, rgba(9, 28, 44, 0.95), rgba(3, 8, 12, 0.95));
}

.session-display__time {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(3rem, 10vw, 5rem);
  line-height: 1;
}

.session-display__phase {
  margin-top: 0.5rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.8rem;
}

.bars {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
  align-items: end;
  min-height: 220px;
}

.bar {
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  border-radius: 18px 18px 6px 6px;
  position: relative;
  min-height: 24px;
}

.bar span {
  position: absolute;
  bottom: -1.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.8rem;
  color: var(--muted);
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.toggle-card {
  text-align: left;
  border-radius: 22px;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text);
  cursor: pointer;
}

.toggle-card.is-on {
  border-color: rgba(126, 240, 210, 0.42);
  background: rgba(126, 240, 210, 0.09);
}

.toggle-card p {
  margin-bottom: 0;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .hero,
  .grid--two,
  .grid--three,
  .form,
  .settings-grid {
    grid-template-columns: 1fr;
  }

  .tabs {
    top: 0.5rem;
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(100% - 1rem, 100%);
    padding-top: 1rem;
  }

  .hero__copy,
  .hero__card,
  .panel {
    padding: 1.2rem;
    border-radius: 22px;
  }

  .hero__copy h1 {
    max-width: 12ch;
  }
}