:root {
  --bg: #f2efe6;
  --bg-accent: #dcebd8;
  --bg-panel: rgba(255, 252, 247, 0.9);
  --bg-elevated: rgba(255, 255, 255, 0.8);
  --ink: #1f2a24;
  --muted: #5e6c62;
  --line: rgba(31, 42, 36, 0.12);
  --primary: #0d6b57;
  --primary-strong: #0a5545;
  --accent: #f0a84f;
  --shadow: 0 24px 60px rgba(22, 34, 27, 0.12);
  --stage: #eef5ef;
  --stage-top: #f6fbf7;
  --trail: rgba(12, 122, 100, 0.35);
  --target: #0c7a64;
  --target-alt: #f2644c;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Avenir Next", "Segoe UI", "Trebuchet MS", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(240, 168, 79, 0.28), transparent 28%),
    radial-gradient(circle at top right, rgba(13, 107, 87, 0.22), transparent 26%),
    linear-gradient(160deg, var(--bg) 0%, #edf4ea 45%, var(--bg-accent) 100%);
}

button,
select,
input,
textarea {
  font-family: "Avenir Next", "Segoe UI", "Trebuchet MS", sans-serif;
}

button,
select,
input,
textarea {
  border-radius: 18px;
}

button {
  border: 2px solid transparent;
  padding: 1rem 1.45rem;
  cursor: pointer;
  font-weight: 900;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  transition: transform 140ms ease, opacity 140ms ease, background-color 140ms ease, border-color 140ms ease, box-shadow 140ms ease;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.08);
}

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

button:focus-visible {
  outline: 3px solid rgba(237, 141, 59, 0.45);
  outline-offset: 2px;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
}

.primary {
  background: var(--primary);
  color: #fff;
  border-color: color-mix(in srgb, var(--primary) 70%, black);
}

.secondary {
  background: var(--bg-elevated);
  border-color: rgba(31, 42, 36, 0.22);
  color: var(--ink);
}

.app-shell {
  width: min(1100px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
}

.site-footer {
  margin-top: 1.25rem;
  text-align: center;
  font-size: 0.92rem;
  color: var(--muted);
  padding: 0.75rem 1rem 0;
  line-height: 1.55;
}

.screen {
  display: none;
}

.screen.active {
  display: block;
}

.card {
  background: var(--bg-panel);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 28px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.hero {
  margin-bottom: 1.5rem;
}

.hero-topbar,
.section-heading,
.button-row,
.exercise-topbar,
.summary-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.eyebrow,
.step-label,
.metric span,
.pill,
.scale-label {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--muted);
}

.step-label,
.metric span,
.pill,
.scale-label {
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.eyebrow {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: none;
}

h1,
h2 {
  margin: 0.25rem 0 0.65rem;
  line-height: 0.98;
  font-family: "Avenir Next Condensed", "Franklin Gothic Medium", "Trebuchet MS", sans-serif;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 5rem);
}

h2 {
  font-size: clamp(2rem, 5vw, 3.1rem);
}

.hero-copy,
.modal-copy,
.summary-copy,
.countdown-summary {
  color: var(--muted);
  line-height: 1.6;
}

.range-card,
.metric,
.pill,
.between-card,
.rating-grid button,
.linear-scale,
.field input,
.field select,
textarea {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
}

.smooth-subheader {
  width: min(760px, 100%);
  margin-top: 0.25rem;
  padding: 1rem 1.15rem;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.52);
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: var(--shadow);
}

.smooth-subheader p {
  margin: 0.45rem 0;
  color: var(--muted);
  line-height: 1.55;
}

.setup-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.span-2 {
  grid-column: span 2;
}

.field {
  display: grid;
  gap: 0.55rem;
  font-weight: 700;
}

.field-title {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.info-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.info-button {
  width: 1.7rem;
  height: 1.7rem;
  min-width: 1.7rem;
  padding: 0;
  border-radius: 999px;
  background: var(--bg-elevated);
  color: var(--primary-strong);
  border-color: var(--line);
  font-size: 0.92rem;
  font-weight: 900;
  box-shadow: none;
}

.tooltip {
  position: absolute;
  left: calc(100% + 0.55rem);
  top: 50%;
  width: min(320px, 70vw);
  padding: 0.8rem 0.9rem;
  border-radius: 16px;
  background: var(--ink);
  color: var(--bg);
  font-size: 0.88rem;
  line-height: 1.45;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-50%) translateX(-4px);
  transition: opacity 140ms ease, transform 140ms ease;
  z-index: 3;
}

.info-wrap:hover .tooltip,
.info-wrap:focus-within .tooltip {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

.field input,
.field select,
textarea {
  width: 100%;
  color: var(--ink);
  padding: 0.95rem 1rem;
}

.range-card {
  padding: 1rem;
  border-radius: 24px;
}

.range-card input {
  width: 100%;
  accent-color: var(--primary);
}

.range-meta {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.7rem;
  color: var(--muted);
}

.range-meta strong {
  color: var(--primary-strong);
  font-size: 1.15rem;
}

.summary-panel {
  margin-top: 1.4rem;
  padding: 1rem 1.1rem;
  border-radius: 22px;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
}

.setup-actions {
  align-items: stretch;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.setup-actions button {
  min-width: 180px;
}

.home-button {
  min-width: 110px;
  padding-inline: 1.2rem;
  white-space: nowrap;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: none;
  place-items: center;
  padding: 1.5rem;
  background: rgba(10, 18, 20, 0.45);
  backdrop-filter: blur(12px);
}

.modal.active {
  display: grid;
}

.modal-card {
  width: min(640px, 100%);
  padding: 1.8rem;
  border-radius: 28px;
  background: var(--bg-panel);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow);
}

.role-buttons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.4rem;
}

.large-button {
  padding: 1.2rem;
  font-size: 1.1rem;
}

.full-center {
  min-height: calc(100vh - 3rem);
  display: none;
  place-items: center;
}

.full-center.active {
  display: grid;
}

.countdown-shell {
  text-align: center;
}

.countdown-label {
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  color: var(--muted);
}

.countdown-number {
  font-size: clamp(6rem, 24vw, 12rem);
  font-weight: 900;
  line-height: 0.9;
  margin: 0.25rem 0 0.8rem;
}

.exercise-mode.active {
  display: block;
}

body.session-mode .app-shell {
  width: 100%;
  max-width: none;
  padding: 0;
}

.exercise-mode {
  min-height: 100vh;
  background: var(--stage);
}

.exercise-topbar {
  padding: 1rem;
}

.metric {
  padding: 0.85rem 1rem;
  border-radius: 20px;
}

.metric strong {
  display: block;
  font-size: 1.1rem;
}

.exercise-actions {
  display: flex;
  gap: 0.8rem;
}

.exercise-stage {
  position: relative;
  height: calc(100vh - 112px);
  overflow: hidden;
  background:
    radial-gradient(circle at center, rgba(255, 255, 255, 0.03), transparent 48%),
    linear-gradient(180deg, var(--stage-top), var(--stage));
}

.exercise-stage.bg-subtle {
  animation: subtleStageShift 8s ease-in-out infinite alternate;
}

.exercise-stage.bg-optokinetic::before {
  content: "";
  position: absolute;
  inset: -20%;
  background:
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.06) 0 28px,
      rgba(0, 0, 0, 0.06) 28px 56px
    );
  animation: driftStripes 7s linear infinite;
  opacity: 0.75;
}

.trail-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

#trail-line {
  fill: none;
  stroke: var(--trail);
  stroke-width: 0.35;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.target {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  width: 64px;
  height: 64px;
  margin-left: -32px;
  margin-top: -32px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--target);
  border-radius: 999px;
  box-shadow: 0 0 0 12px rgba(255, 255, 255, 0.06), 0 10px 30px rgba(0, 0, 0, 0.18);
}

.target.classic-dot {
  width: 58px;
  height: 58px;
  margin-left: -29px;
  margin-top: -29px;
}

.target.trail-dot::after {
  content: "";
  width: 22px;
  height: 22px;
  border-radius: 999px;
  background: #fff;
  opacity: 0.8;
}

.target.ring {
  background: transparent;
  border: 10px solid var(--target);
  box-shadow: 0 0 0 10px rgba(255, 255, 255, 0.05);
}

.target.color {
  transition: background-color 260ms ease, box-shadow 260ms ease;
}

.target.letter,
.target.word,
.target.word-color {
  width: auto;
  min-width: 88px;
  height: auto;
  min-height: 88px;
  padding: 1rem 1.2rem;
  border-radius: 999px;
}

.target-content {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.between-card,
.post-card {
  margin-top: 1rem;
}

.between-card {
  text-align: center;
}

.rating-scale {
  margin: 1.2rem 0;
}

.rating-grid {
  display: grid;
  grid-template-columns: repeat(11, minmax(0, 1fr));
  gap: 0.75rem;
}

.rating-grid button {
  min-height: 84px;
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--ink);
}

.rating-grid button.selected {
  background: var(--primary);
  color: #fff;
  border-color: transparent;
  transform: translateY(-2px);
}

.linear-scale {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 1rem;
  border-radius: 22px;
  margin-bottom: 1rem;
}

.scale-bar {
  height: 10px;
  border-radius: 999px;
  flex: 1;
  background: linear-gradient(90deg, #2cb67d 0%, #ffd166 50%, #ef476f 100%);
}

textarea {
  min-height: 180px;
  resize: vertical;
}

@keyframes subtleStageShift {
  0% {
    filter: hue-rotate(0deg) saturate(1);
  }
  100% {
    filter: hue-rotate(18deg) saturate(1.08);
  }
}

@keyframes driftStripes {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-120px);
  }
}

body.session-mode .hero,
body.session-mode .site-footer,
body.session-mode .banner {
  display: none;
}

@media (max-width: 920px) {
  .setup-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .span-2 {
    grid-column: span 2;
  }

  .summary-panel,
  .hero-topbar,
  .section-heading,
  .button-row,
  .exercise-topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .rating-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .home-button {
    align-self: flex-end;
  }

  .tooltip {
    left: 0;
    top: calc(100% + 0.5rem);
    transform: translateY(0);
  }

  .info-wrap:hover .tooltip,
  .info-wrap:focus-within .tooltip {
    transform: translateY(0);
  }
}

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

  .card,
  .modal-card {
    border-radius: 24px;
    padding: 1.15rem;
  }

  .setup-grid,
  .role-buttons {
    grid-template-columns: 1fr;
  }

  .span-2 {
    grid-column: span 1;
  }

  .rating-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .exercise-stage {
    height: calc(100vh - 192px);
  }
}