:root {
  --ink: #0b0b0b;
  --muted: #5a5f6b;
  --accent: #f1582b;
  --accent-dark: #c64520;
  --paper: #f7f2ec;
  --card: #ffffff;
  --line: rgba(11, 11, 11, 0.12);
  --shadow: 0 24px 60px rgba(11, 11, 11, 0.12);
  --font-display: "Avenir Next", "Futura", "Gill Sans", "Trebuchet MS", sans-serif;
  --font-body: "Sentinel", "Georgia", "Times New Roman", serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(241, 88, 43, 0.18), transparent 50%),
    radial-gradient(circle at bottom right, rgba(11, 11, 11, 0.08), transparent 55%),
    linear-gradient(135deg, #f7f2ec 0%, #f2e7da 40%, #f7f2ec 100%);
  color: var(--ink);
  font-family: var(--font-body);
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 24px 64px;
  animation: page-in 0.8s ease-out;
}

@keyframes page-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  padding: 24px 28px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow);
}

.eyebrow {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.28em;
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 12px;
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 46px);
  margin: 0 0 12px;
}

.subhead {
  margin: 0;
  max-width: 560px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.6;
}

.code {
  font-family: "Courier New", monospace;
  background: rgba(11, 11, 11, 0.08);
  padding: 2px 6px;
  border-radius: 6px;
}

.session {
  display: grid;
  gap: 8px;
  font-family: var(--font-display);
}

.session input {
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  font-family: var(--font-display);
  font-size: 14px;
  background: var(--card);
}

.session select {
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  font-family: var(--font-display);
  font-size: 14px;
  background: var(--card);
}

.io-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.io-actions button,
.import-button {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 14px;
  font-family: var(--font-display);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.link-button {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 14px;
  font-family: var(--font-display);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-decoration: none;
}

.import-button input {
  display: none;
}

.log-full {
  margin-top: 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
  background: var(--card);
  box-shadow: 0 18px 40px rgba(11, 11, 11, 0.08);
}

.log-full-header,
.log-full-row {
  display: grid;
  grid-template-columns: 110px 80px 1fr 2fr;
  gap: 12px;
  align-items: center;
}

.log-full-header {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  color: var(--muted);
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
}

.log-full-rows {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.log-full-row {
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(11, 11, 11, 0.04);
  font-size: 14px;
}

@media (max-width: 700px) {
  .log-full-header,
  .log-full-row {
    grid-template-columns: 80px 60px 1fr;
  }

  .log-full-header span:last-child,
  .log-full-row span:last-child {
    grid-column: 1 / -1;
  }
}

.summary {
  margin: 32px 0 24px;
  display: grid;
  gap: 12px;
  font-size: 15px;
  color: var(--muted);
}

.summary p {
  margin: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.card {
  background: var(--card);
  border-radius: 20px;
  padding: 20px 20px 18px;
  border: 1px solid var(--line);
  box-shadow: 0 18px 40px rgba(11, 11, 11, 0.08);
  display: grid;
  gap: 14px;
  animation: card-in 0.6s ease-out both;
}

.card:nth-child(odd) {
  animation-delay: 0.08s;
}

@keyframes card-in {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.exercise-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
}

.exercise-meta {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.badge {
  font-family: var(--font-display);
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(241, 88, 43, 0.16);
  color: var(--accent-dark);
}

.badge.optional {
  background: rgba(11, 11, 11, 0.08);
  color: var(--muted);
}

.exercise-notes {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.5;
}

.log-form {
  display: grid;
  gap: 12px;
}

.field-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  font-family: var(--font-display);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.field-hint {
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.02em;
  text-transform: none;
  color: rgba(11, 11, 11, 0.6);
}

input,
textarea {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  font-family: var(--font-body);
  font-size: 14px;
  background: #fdfcfb;
}

textarea {
  resize: vertical;
}

.actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

button {
  border: none;
  border-radius: 999px;
  padding: 10px 18px;
  font-family: var(--font-display);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  cursor: pointer;
}

button[type="submit"] {
  background: var(--accent);
  color: white;
  box-shadow: 0 12px 24px rgba(241, 88, 43, 0.35);
}

.clear-btn {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
}

.log-table {
  border-top: 1px dashed var(--line);
  padding-top: 12px;
  display: grid;
  gap: 10px;
}

.log-table-header,
.log-row {
  display: grid;
  grid-template-columns: 52px 70px 90px 1fr 40px;
  gap: 8px;
  align-items: center;
  font-size: 13px;
}

.log-table-header {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.log-row {
  background: rgba(11, 11, 11, 0.03);
  border-radius: 10px;
  padding: 8px 10px;
}

.log-row button {
  padding: 6px 8px;
  font-size: 11px;
  background: transparent;
  color: var(--accent-dark);
}

.empty-state {
  font-size: 13px;
  color: var(--muted);
}

@media (max-width: 700px) {
  .hero {
    padding: 20px;
  }

  .log-table-header,
  .log-row {
    grid-template-columns: 48px 60px 70px 1fr 32px;
  }
}