:root {
  --color-bg: #EEF2F4;
  --color-surface: #FFFFFF;
  --color-ink: #1B2430;
  --color-ink-soft: #5B6573;
  --color-accent: #FF5A2B;
  --color-accent-soft: #FFE4D9;
  --color-success: #5C7A6B;
  --color-line: #D7DEE3;
  --font-display: -apple-system, "Segoe UI", system-ui, sans-serif;
  --font-body: -apple-system, "Segoe UI", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.5;
  padding: 0 0 4rem;
}

main {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Header */

.site-header {
  max-width: 880px;
  margin: 0 auto;
  padding: 3rem 1.5rem 2rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 0.5rem;
}

.site-header h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: -0.01em;
  margin: 0;
}

/* Cards */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 14px;
  padding: 1.75rem;
}

.card h2 {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--color-ink-soft);
  margin: 0 0 1.25rem;
}

/* Goal section */

.goal-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.ring-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 14px;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.ring-wrap {
  position: relative;
  width: 160px;
  height: 160px;
}

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

.ring-track {
  fill: none;
  stroke: var(--color-line);
  stroke-width: 10;
}

.ring-progress {
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 10;
  stroke-linecap: round;
  stroke-dasharray: 339.292;
  stroke-dashoffset: 339.292;
  transition: stroke-dashoffset 0.4s ease;
}

.ring-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.ring-value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
}

.ring-unit {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-ink-soft);
}

.goal-summary {
  margin: 1.25rem 0 0.25rem;
  font-weight: 600;
}

.goal-days {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-ink-soft);
}

.goal-form label {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
  margin: 1rem 0 0.35rem;
}

.goal-form select,
.goal-form input {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--color-bg);
  color: var(--color-ink);
}

.goal-form button,
.run-form button {
  margin-top: 1.25rem;
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.7rem 1.4rem;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
}

.goal-form button:hover,
.run-form button:hover {
  filter: brightness(1.08);
}

/* Stats */

.stats-section {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 14px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.stat-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-ink-soft);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  margin-top: 0.35rem;
}

.stat-unit {
  font-size: 0.75rem;
  color: var(--color-ink-soft);
}

/* Run form */

.run-form {
  display: grid;
  grid-template-columns: repeat(3, 1fr) auto;
  gap: 1rem;
  align-items: end;
}

.field label {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
  margin-bottom: 0.35rem;
}

.field input {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--color-bg);
  color: var(--color-ink);
}

.form-error {
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 600;
  min-height: 1.2em;
  margin: 0.75rem 0 0;
}

/* History */

.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.history-header h2 {
  margin: 0;
}

.filter-label {
  font-size: 0.8rem;
  color: var(--color-ink-soft);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.filter-label select {
  font-family: var(--font-body);
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  border: 1px solid var(--color-line);
  background: var(--color-bg);
  color: var(--color-ink);
  text-transform: none;
  letter-spacing: normal;
}

.history-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.history-row {
  display: grid;
  grid-template-columns: 110px 1fr 1fr 90px 40px;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0.5rem;
  border-bottom: 1px solid var(--color-line);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.history-row:last-child {
  border-bottom: none;
}

.delete-button {
  background: none;
  border: none;
  color: var(--color-ink-soft);
  font-family: var(--font-body);
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
}

.delete-button:hover {
  color: var(--color-accent);
}

.empty-state {
  color: var(--color-ink-soft);
  font-size: 0.95rem;
  padding: 1rem 0;
}

/* Footer */

.site-footer {
  max-width: 880px;
  margin: 2rem auto 0;
  padding: 0 1.5rem;
  display: flex;
  justify-content: flex-end;
}

.reset-button {
  background: none;
  border: 1px solid var(--color-line);
  color: var(--color-ink-soft);
  border-radius: 8px;
  padding: 0.6rem 1.1rem;
  font-size: 0.85rem;
  cursor: pointer;
}

.reset-button.confirming {
  background: var(--color-accent-soft);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Responsive */

@media (max-width: 720px) {
  .goal-grid {
    grid-template-columns: 1fr;
  }
  .stats-section {
    grid-template-columns: repeat(2, 1fr);
  }
  .run-form {
    grid-template-columns: 1fr;
  }
  .history-row {
    grid-template-columns: 1fr 1fr 1fr auto;
    font-size: 0.8rem;
  }
}