:root {
  /* Backgrounds */
  --bg: #CEE5ED;
  --bg-card: #ffffff;

  /* Text */
  --text-primary: #000000;
  --text-dark: #181821;
  --text-muted: rgba(0,0,0,0.55);

  /* Accent - Sage Green */
  --green: #9ec3ae;
  --green-dark: #305543;
  --teal: #239491;

  /* UI */
  --border: rgba(0,0,0,0.08);
  --radius-sm: 0;
  --radius-md: 0;
  --radius-lg: 0;
  --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
  --transition: all 0.3s cubic-bezier(0,0,0.2,1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Georgia, 'Times New Roman', Times, serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px 12px 48px;
  flex: 1;
}

/* ============================================================
   TABS - Inside dark header
   ============================================================ */
.tabs {
  display: flex;
  gap: 28px;
  padding: 8px 0 10px;
}

.tab-btn {
  padding: 6px 14px;
  border: none;
  background: #ffffff;
  color: #000000;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  border-radius: 0;
  transition: var(--transition);
  letter-spacing: 2.5px;
  text-transform: uppercase;
}

.tab-btn:hover {
  background: #f0f0f0;
}

.tab-btn.active {
  background: #e0e0e0;
  color: #000000;
  font-weight: 700;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ============================================================
   CARDS - Clean white with soft rounded corners
   ============================================================ */
.card {
  background: var(--bg-card);
  padding: 28px;
  margin-bottom: 20px;
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card h2 {
  margin: 0 0 20px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: -0.3px;
}

.card h3 {
  margin: 16px 0 10px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-dark);
}

.profile-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px 24px;
}

@media (max-width: 900px) {
  .profile-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .profile-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   FORM GROUPS - Clean, minimal inputs
   ============================================================ */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid rgba(0,0,0,0.08);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  background: #fff;
  color: var(--text-primary);
  transition: var(--transition);
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(158, 195, 174, 0.2);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(0,0,0,0.3);
}

/* ============================================================
   BUTTONS - Tall, bold, uppercase (MadFit style)
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  border: none;
  font-size: 0.7rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  font-family: inherit;
  min-height: 52px;
}

.btn-primary {
  background: var(--text-dark);
  color: #ffffff;
  box-shadow: 0 20px 30px -22px rgba(0,0,0,0.5);
}

.btn-primary:hover {
  background: #000;
  transform: scale(1.02);
  box-shadow: 0 25px 35px -20px rgba(0,0,0,0.6);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  background: transparent;
  color: var(--text-dark);
  border: 1.5px solid rgba(0,0,0,0.15);
  box-shadow: none;
}

.btn-secondary:hover {
  border-color: var(--text-dark);
  background: rgba(0,0,0,0.02);
}

/* Form Actions */
.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.form-actions .btn {
  flex: 1;
}

/* Macros Toggle Switch */
.macros-toggle-wrap {
  margin-bottom: 16px;
}

.macros-switch {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.macros-switch input {
  display: none;
}

.macros-slider {
  position: relative;
  width: 40px;
  height: 22px;
  background: rgba(0,0,0,0.12);
  border-radius: 11px;
  transition: var(--transition);
}

.macros-slider::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  background: #fff;
  border-radius: 50%;
  transition: var(--transition);
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.macros-switch input:checked + .macros-slider {
  background: var(--green-dark);
}

.macros-switch input:checked + .macros-slider::after {
  left: 21px;
}

.macros-label-text {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 2px;
}

#macros-fields {
  overflow: hidden;
  max-height: 200px;
  opacity: 1;
  transition: max-height 0.3s ease, opacity 0.3s ease, margin 0.3s ease;
}

#macros-fields.hidden {
  max-height: 0;
  opacity: 0;
  margin-bottom: 0;
  pointer-events: none;
}

/* ============================================================
   RESULTS - Stat card grid
   ============================================================ */
.results-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

@media (max-width: 768px) {
  .results-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.result-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 16px;
  text-align: center;
  transition: var(--transition);
}

.result-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  border-color: var(--green);
}

.result-item .label {
  display: block;
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 2px;
  font-weight: 600;
}

.result-item .value {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-dark);
  letter-spacing: -0.5px;
}

/* ============================================================
   SCHEDULE CARDS - Clean with colored left borders
   ============================================================ */
#schedule-output {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 16px;
}

.schedule-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 16px;
  transition: var(--transition);
  border-top: 4px solid #305543;
  margin-bottom: 0;
}

.schedule-card:nth-child(7n+2) { border-top-color: #239491; }
.schedule-card:nth-child(7n+3) { border-top-color: #305543; }
.schedule-card:nth-child(7n+4) { border-top-color: #239491; }
.schedule-card:nth-child(7n+5) { border-top-color: #305543; }
.schedule-card:nth-child(7n+6) { border-top-color: #239491; }
.schedule-card:nth-child(7n+7) { border-top-color: #305543; }

.schedule-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.schedule-card h4 {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
}

.schedule-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

@media (max-width: 900px) {
  #schedule-output {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 600px) {
  #schedule-output {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============================================================
   EXERCISE LIBRARY - Filter bar + card grid
   ============================================================ */
.filter-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.filter-bar input,
.filter-bar select {
  padding: 12px 16px;
  border: 1.5px solid rgba(0,0,0,0.08);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  background: #fff;
  color: var(--text-primary);
  transition: var(--transition);
  font-family: inherit;
  flex: 1;
  min-width: 160px;
}

.filter-bar input:focus,
.filter-bar select:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(158, 195, 174, 0.2);
}

.library-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 24px;
  align-items: start;
}

@media (max-width: 768px) {
  .library-grid {
    grid-template-columns: 1fr;
  }
}

.exercise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.exercise-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.exercise-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: var(--green);
}

.exercise-card h4 {
  margin: 0 0 4px;
  color: var(--text-dark);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.exercise-card p {
  margin: 0 0 10px;
  color: var(--text-muted);
  font-size: 0.8rem;
  line-height: 1.4;
}

.exercise-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.65rem;
  font-weight: 700;
  border-radius: 0;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.tag-muscle {
  background: rgba(158, 195, 174, 0.15);
  color: var(--green-dark);
}

.tag-equipment {
  background: rgba(35, 148, 145, 0.1);
  color: var(--teal);
}

.tag-difficulty {
  background: rgba(210, 177, 177, 0.2);
  color: #8a6b6b;
}

/* ============================================================
   CHART
   ============================================================ */
.chart-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin: 20px 0;
  height: 280px;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.chart-container canvas {
  width: 100%;
  height: 100%;
}

/* Progress Log Row */
.progress-log-row {
  display: flex;
  gap: 16px;
  align-items: flex-end;
  flex-wrap: wrap;
}

.progress-log-row .form-group {
  flex: 1;
  min-width: 150px;
  margin-bottom: 0;
}

@media (max-width: 600px) {
  .progress-log-row {
    flex-direction: column;
    align-items: stretch;
  }
}

/* ============================================================
   APP HEADER - Clean dark header
   ============================================================ */
.app-header {
  background: url('../images/polka-dot.webp') repeat;
  background-position: 5px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 16px 0 10px;
  text-align: center;
}

.header-content {
  margin: -16px auto 0;
  padding: 16px 32px 0 32px;
  position: relative;
  z-index: 1;
  background: #ffffff;
  display: inline-block;
  text-align: left;
  min-width: 420px;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 3px 0 18px;
  position: relative;
  z-index: 1;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 18px;
}

.header-logo h1 {
  font-size: 2rem;
  font-weight: 800;
  color: #000000;
  margin: 0;
  letter-spacing: -0.5px;
  text-shadow: none;
  background: #ffffff;
  display: inline-block;
  padding: 4px 12px;
}

.header-logo span {
  font-size: 0.85rem;
  color: #000000;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  text-shadow: none;
  background: #ffffff;
  padding: 4px 10px;
}

/* ============================================================
   NOTIFICATION TOAST
   ============================================================ */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--text-dark);
  color: #ffffff;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.85rem;
  box-shadow: 0 12px 32px rgba(0,0,0,0.2);
  z-index: 1000;
  opacity: 0;
  transform: translateY(-10px);
  transition: var(--transition);
}
.notification.show {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   UNIT TOGGLE BUTTONS
   ============================================================ */
.unit-toggle {
  display: flex;
  gap: 4px;
  margin-bottom: 8px;
}

.unit-btn {
  padding: 8px 18px;
  border: 1.5px solid rgba(0,0,0,0.08);
  background: #fff;
  border-radius: 0;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  transition: var(--transition);
  color: var(--text-muted);
  font-family: inherit;
}

.unit-btn:hover {
  border-color: var(--green);
  color: var(--green-dark);
}

.unit-btn.active {
  background: var(--text-dark);
  color: #ffffff;
  border-color: var(--text-dark);
}

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--green);
  border-radius: 0;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--green-dark);
}

/* ============================================================
   FOOTER
   ============================================================ */
.app-footer {
  background: #ffffff;
  padding: 32px 0 24px;
  border-top: 1px solid rgba(0,0,0,0.06);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}

.footer-copy {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 400;
  margin: 0;
}

@media (max-width: 768px) {
  .app-footer {
    margin-top: 32px;
    padding: 24px 0 20px;
  }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .container {
    padding: 16px 12px 32px;
  }

  .card {
    padding: 20px;
    border-radius: var(--radius-md);
  }

  .tabs {
    flex-wrap: wrap;
  }

  .tab-btn {
    flex: 1 1 auto;
    font-size: 0.65rem;
    padding: 8px;
    letter-spacing: 1.5px;
  }

  .exercise-grid {
    grid-template-columns: 1fr;
  }

  .header-logo span {
    display: none;
  }

  .btn {
    padding: 14px 24px;
    font-size: 0.65rem;
    min-height: 46px;
  }
}