:root {
  --bg: #e9f6ff;
  --bg-deep: #d0ebff;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --text: #0b2740;
  --muted: #4f6f8d;
  --line: rgba(11, 39, 64, 0.1);
  --accent: #0077b6;
  --accent-2: #00a6fb;
  --danger: #b63e3e;
  --success: #177b56;
  --shadow: 0 20px 60px rgba(26, 72, 112, 0.14);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --font-display: "Avenir Next", "Segoe UI", "Trebuchet MS", sans-serif;
  --font-body: "Avenir Next", "Segoe UI", "Trebuchet MS", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.9), transparent 26%),
    radial-gradient(circle at right 20%, rgba(0, 166, 251, 0.22), transparent 22%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
}

body {
  margin: 0;
  color: var(--text);
  font-family: var(--font-body);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.14) 1px, transparent 1px);
  background-size: 34px 34px;
  opacity: 0.45;
  pointer-events: none;
}

.app-shell {
  position: relative;
  max-width: 1180px;
  margin: 0 auto;
  padding: env(safe-area-inset-top, 18px) 18px calc(env(safe-area-inset-bottom, 18px) + 32px);
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  padding: 18px 8px 26px;
}

.hero h1,
.section-heading h2,
.card--hint h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.04em;
}

.hero h1 {
  font-size: clamp(2.8rem, 6vw, 5.4rem);
  line-height: 0.9;
}

.hero__text,
.card--hint p,
.status-message {
  color: var(--muted);
  line-height: 1.55;
}

.hero__chip {
  min-width: 140px;
  padding: 14px 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero__chip-label,
.eyebrow,
.section-kicker {
  display: block;
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.layout {
  display: grid;
  gap: 18px;
}

.card {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.52);
  border-radius: var(--radius-xl);
  padding: 22px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.card--spotlight {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(233, 246, 255, 0.72)),
    linear-gradient(180deg, rgba(0, 166, 251, 0.06), rgba(0, 119, 182, 0.1));
}

.card--hint {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(232, 243, 255, 0.8)),
    linear-gradient(135deg, rgba(0, 119, 182, 0.08), transparent);
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 18px;
}

.button {
  border: 0;
  border-radius: 999px;
  padding: 13px 18px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
}

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

.button:active {
  transform: translateY(0);
}

.button--primary {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #fff;
  box-shadow: 0 12px 28px rgba(0, 119, 182, 0.28);
}

.button--ghost {
  background: rgba(255, 255, 255, 0.7);
  color: var(--text);
  border: 1px solid rgba(11, 39, 64, 0.08);
}

.button--danger {
  background: rgba(182, 62, 62, 0.12);
  color: var(--danger);
  border: 1px solid rgba(182, 62, 62, 0.18);
}

.session-grid,
.summary-grid,
.insight-panels,
.rink-form,
.action-row,
.action-row--tight {
  display: grid;
  gap: 14px;
}

.session-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 18px;
}

.metric-tile,
.summary-card,
.insight-card,
.rink-item,
.history-item {
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(11, 39, 64, 0.06);
}

.metric-tile,
.summary-card {
  padding: 18px;
}

.metric-tile span,
.summary-card__label,
.detail-row span,
.bar-list__meta,
.history-item__meta {
  color: var(--muted);
  font-size: 0.92rem;
}

.metric-tile strong,
.summary-card__value {
  display: block;
  margin-top: 10px;
  font-size: 1.45rem;
  letter-spacing: -0.03em;
}

.action-row {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 18px;
}

.action-row--tight {
  grid-template-columns: repeat(2, auto);
}

.status-message {
  margin: 16px 0 0;
}

.summary-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 18px;
}

.insight-panels {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 18px;
}

.insight-card {
  padding: 18px;
}

.insight-card h3 {
  margin: 0 0 16px;
}

.bar-list {
  display: grid;
  gap: 12px;
}

.bar-row {
  display: grid;
  gap: 8px;
}

.bar-row__top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
}

.bar-track {
  height: 12px;
  border-radius: 999px;
  background: rgba(11, 39, 64, 0.08);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.rink-form {
  grid-template-columns: repeat(4, minmax(0, 1fr)) auto;
  align-items: end;
}

label {
  display: grid;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--muted);
}

input {
  width: 100%;
  border: 1px solid rgba(11, 39, 64, 0.12);
  border-radius: 16px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.92);
  font: inherit;
  color: var(--text);
}

input:focus {
  outline: 2px solid rgba(0, 166, 251, 0.32);
  border-color: rgba(0, 166, 251, 0.4);
}

.rink-list,
.history-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.rink-item,
.history-item {
  padding: 16px;
}

.rink-item__top,
.history-item__top,
.detail-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.rink-item__top strong,
.history-item__top strong {
  font-size: 1.04rem;
}

.rink-item__actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}

.mini-button {
  border: 0;
  background: rgba(0, 119, 182, 0.08);
  color: var(--accent);
  border-radius: 999px;
  padding: 8px 12px;
  font: inherit;
  cursor: pointer;
}

.mini-button--danger {
  background: rgba(182, 62, 62, 0.12);
  color: var(--danger);
}

.empty-state {
  color: var(--muted);
  margin: 0;
}

@media (max-width: 920px) {
  .session-grid,
  .summary-grid,
  .insight-panels,
  .action-row,
  .rink-form {
    grid-template-columns: 1fr;
  }

  .section-heading {
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .app-shell {
    padding-left: 14px;
    padding-right: 14px;
  }

  .hero {
    flex-direction: column;
    align-items: start;
  }

  .card {
    padding: 18px;
  }

  .hero h1 {
    font-size: 2.8rem;
  }
}