:root {
  /* Pastel palette */
  --lavender: #e6dfff;
  --lavender-deep: #7c6af2;
  --pink: #ffdcea;
  --pink-deep: #e0619a;
  --mint: #d3f4e4;
  --mint-deep: #2f9e6e;
  --peach: #ffe3d3;
  --peach-deep: #e07a43;
  --sky: #d8ebff;
  --sky-deep: #3d82d6;
  --butter: #fff2c2;
  --butter-deep: #c08a12;

  --text: #2a2540;
  --muted: #847e9c;
  --card: rgba(255, 255, 255, 0.78);
  --field: #f5f3fb;
  --border: rgba(124, 106, 242, 0.12);
  --danger: #e0526b;
  --gradient: linear-gradient(135deg, #c9b8ff 0%, #ffc4dd 55%, #ffd9bf 100%);
  --radius: 22px;
  --tab-height: 68px;
  --shadow: 0 8px 24px rgba(92, 72, 180, 0.08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  color: var(--text);
  font-family: ui-rounded, "SF Pro Rounded", "Nunito", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

html {
  background:
    radial-gradient(circle at 0% 0%, #efe8ff 0, transparent 45%),
    radial-gradient(circle at 100% 10%, #ffe6f0 0, transparent 40%),
    radial-gradient(circle at 50% 100%, #e3f6ee 0, transparent 50%),
    #fbfaff;
  background-attachment: fixed;
  min-height: 100%;
}

body {
  max-width: 520px;
  margin: 0 auto;
  min-height: 100vh;
  padding-bottom: calc(var(--tab-height) + env(safe-area-inset-bottom) + 24px);
}

/* Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 5;
  padding: calc(env(safe-area-inset-top) + 20px) 22px 14px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(251, 250, 255, 0.7);
}
.app-header h1 {
  margin: 0;
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(90deg, var(--lavender-deep), var(--pink-deep) 60%, var(--peach-deep));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.app-header p { margin: 2px 0 0; font-size: 14px; color: var(--muted); font-weight: 500; }

main { padding: 4px 16px 0; }

.view { display: none; animation: fade-in 0.25s ease; }
.view.active { display: block; }

@keyframes fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

/* Form */
form {
  background: var(--card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.field { display: block; margin-bottom: 16px; flex: 1; }
.field span {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 7px;
  padding-left: 2px;
}

.row { display: flex; gap: 12px; }

input, textarea {
  width: 100%;
  font: inherit;
  font-size: 16px; /* prevents iOS zoom on focus */
  font-weight: 500;
  color: var(--text);
  background: var(--field);
  border: 2px solid transparent;
  border-radius: 14px;
  padding: 12px 14px;
  outline: none;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
  appearance: none;
}
input::placeholder, textarea::placeholder { color: #b5afc9; }
input:focus, textarea:focus {
  border-color: #c9b8ff;
  background: #fff;
  box-shadow: 0 0 0 4px rgba(201, 184, 255, 0.25);
}
textarea { resize: vertical; }

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 4px 0 12px;
}
.section-title h2 { margin: 0; font-size: 17px; font-weight: 800; }

.link-btn {
  background: var(--lavender);
  border: none;
  color: var(--lavender-deep);
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  padding: 7px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.1s;
}
.link-btn:active { transform: scale(0.95); }

/* Exercise rows cycle through pastel tints */
.exercise {
  border-radius: 18px;
  padding: 12px;
  margin-bottom: 12px;
  background: var(--sky);
}
.exercise:nth-child(5n+2) { background: var(--mint); }
.exercise:nth-child(5n+3) { background: var(--peach); }
.exercise:nth-child(5n+4) { background: var(--pink); }
.exercise:nth-child(5n+5) { background: var(--butter); }

.exercise input { background: rgba(255, 255, 255, 0.75); }
.exercise input:focus { background: #fff; }
.exercise .ex-name { margin-bottom: 8px; font-weight: 600; }
.ex-numbers { display: flex; gap: 8px; align-items: center; }
.ex-numbers label { flex: 1; position: relative; }
.ex-numbers input { padding-right: 34px; }
.ex-numbers span {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  pointer-events: none;
}

.remove-btn {
  flex: 0 0 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.75);
  color: var(--muted);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
}
.remove-btn:active { background: #fff; color: var(--danger); }

.primary-btn {
  width: 100%;
  margin-top: 8px;
  padding: 22px;
  border: none;
  border-radius: 22px;
  background: var(--gradient);
  color: var(--text);
  font: inherit;
  font-size: 20px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(201, 150, 255, 0.35);
  transition: transform 0.1s, box-shadow 0.1s;
}
.primary-btn:active { transform: scale(0.98); box-shadow: 0 4px 12px rgba(201, 150, 255, 0.3); }
.primary-btn:disabled { opacity: 0.6; }

.error { color: var(--danger); font-size: 14px; font-weight: 600; margin: 0 0 12px; }

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 18px;
}
.stat {
  border-radius: var(--radius);
  padding: 16px 8px;
  text-align: center;
}
.stat:nth-child(1) { background: var(--lavender); color: var(--lavender-deep); }
.stat:nth-child(2) { background: var(--mint); color: var(--mint-deep); }
.stat:nth-child(3) { background: var(--peach); color: var(--peach-deep); }
.stat strong { display: block; font-size: 26px; font-weight: 800; letter-spacing: -0.02em; }
.stat span { font-size: 12px; font-weight: 700; opacity: 0.8; }

/* Workout list: each card gets a pastel colour via data-color */
.workout-list { list-style: none; margin: 0; padding: 0; }

.workout {
  --tint: var(--lavender);
  --tint-deep: var(--lavender-deep);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.workout[data-color="1"] { --tint: var(--pink); --tint-deep: var(--pink-deep); }
.workout[data-color="2"] { --tint: var(--mint); --tint-deep: var(--mint-deep); }
.workout[data-color="3"] { --tint: var(--peach); --tint-deep: var(--peach-deep); }
.workout[data-color="4"] { --tint: var(--sky); --tint-deep: var(--sky-deep); }
.workout[data-color="5"] { --tint: var(--butter); --tint-deep: var(--butter-deep); }

.workout-summary {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 14px 16px;
  background: none;
  border: none;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.date-badge {
  flex: 0 0 52px;
  height: 52px;
  border-radius: 16px;
  background: var(--tint);
  color: var(--tint-deep);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  line-height: 1.1;
}
.date-badge b { font-size: 20px; font-weight: 800; }
.date-badge small { font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.04em; }

.workout-info { flex: 1; min-width: 0; }
.workout-info h3 {
  margin: 0 0 3px;
  font-size: 17px;
  font-weight: 800;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.workout-info p { margin: 0; font-size: 13px; font-weight: 500; color: var(--muted); }

.chevron {
  flex: 0 0 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--tint);
  color: var(--tint-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  transition: transform 0.2s;
}
.workout.open .chevron { transform: rotate(90deg); }

.workout-details { display: none; padding: 0 16px 16px; }
.workout.open .workout-details { display: block; animation: fade-in 0.2s ease; }

.workout-details table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 14px;
  background: var(--tint);
  border-radius: 16px;
  padding: 6px 12px;
}
.workout-details th {
  text-align: left;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--tint-deep);
  padding: 6px 0;
}
.workout-details td { padding: 7px 0; font-weight: 600; border-top: 1px solid rgba(255, 255, 255, 0.7); }
.workout-details th:not(:first-child),
.workout-details td:not(:first-child) { text-align: right; }
.workout-notes { margin: 12px 2px 0; font-size: 14px; color: var(--muted); white-space: pre-wrap; }

.delete-btn {
  margin-top: 12px;
  background: #ffe4e9;
  border: none;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--danger);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.empty { text-align: center; color: var(--muted); font-weight: 600; padding: 48px 0; }
.empty::before { content: "🏋️"; display: block; font-size: 44px; margin-bottom: 10px; }

/* Floating tab bar */
.tab-bar {
  position: fixed;
  left: 50%;
  bottom: calc(env(safe-area-inset-bottom) + 12px);
  transform: translateX(-50%);
  width: calc(100% - 32px);
  max-width: 360px;
  display: flex;
  gap: 6px;
  padding: 6px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: 0 12px 32px rgba(92, 72, 180, 0.15);
}
.tab {
  flex: 1;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: none;
  border: none;
  border-radius: 999px;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  color: var(--muted);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.tab svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.5;
  stroke-linecap: round;
}
.tab.active { background: var(--gradient); color: var(--text); }

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--tab-height) + env(safe-area-inset-bottom) + 24px);
  transform: translateX(-50%);
  background: var(--text);
  color: #fff;
  padding: 11px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(42, 37, 64, 0.25);
  white-space: nowrap;
}