/* ============================================================================
   FORGE Gym Tracker - Complete CSS Stylesheet
   Mobile-first, dark default with light theme toggle
   ========================================================================== */

/* ============================================================================
   CSS CUSTOM PROPERTIES (VARIABLES)
   ========================================================================== */

:root {
  /* Dark theme colors (default) */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a26;
  --bg-overlay: rgba(10, 10, 15, 0.8);

  /* Purple accent colors */
  --accent-primary: #6c5ce7;
  --accent-light: #a29bfe;
  --accent-hover: #5f4fd4;

  /* Text colors */
  --text-primary: #ffffff;
  --text-secondary: #b8b8c8;
  --text-tertiary: #6b6b7f;
  --text-inverse: #0a0a0f;

  /* Semantic colors */
  --success: #27ae60;
  --success-light: #2ecc71;
  --danger: #e74c3c;
  --danger-light: #ec7063;
  --warning: #f39c12;
  --info: #3498db;

  /* Borders and dividers */
  --border-color: #2a2a38;
  --border-light: #3a3a48;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Spacing scale */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadow */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;

  /* Safe area insets (mobile) */
  --safe-area-inset-bottom: max(env(safe-area-inset-bottom), 0px);
  --safe-area-inset-top: max(env(safe-area-inset-top), 0px);
  --safe-area-inset-left: max(env(safe-area-inset-left), 0px);
  --safe-area-inset-right: max(env(safe-area-inset-right), 0px);

  /* Z-index scale */
  --z-dropdown: 100;
  --z-modal: 200;
  --z-overlay: 300;
  --z-toast: 400;
  --z-nav-bottom: 50;

  /* Component heights */
  --bottom-nav-height: 72px;
  --header-height: 56px;
  --touch-target: 44px;
}

/* Light theme overrides */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f8fc;
  --bg-card: #f0f0f8;
  --bg-overlay: rgba(255, 255, 255, 0.8);

  --accent-primary: #7c3aed;
  --accent-light: #a78bfa;
  --accent-hover: #6d28d9;

  --text-primary: #0a0a0f;
  --text-secondary: #4b5563;
  --text-tertiary: #8b92a3;
  --text-inverse: #ffffff;

  --border-color: #e5e5ed;
  --border-light: #d5d5e5;

  --bg-overlay: rgba(255, 255, 255, 0.95);
}

/* ============================================================================
   GLOBAL STYLES
   ========================================================================== */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* ============================================================================
   TYPOGRAPHY
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

h4 {
  font-size: var(--font-size-lg);
}

h5, h6 {
  font-size: var(--font-size-base);
}

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-light);
}

/* ============================================================================
   LAYOUT & CONTAINERS
   ========================================================================== */

main {
  padding: var(--spacing-md);
  padding-bottom: calc(var(--bottom-nav-height) + var(--spacing-md) + var(--safe-area-inset-bottom));
  max-width: 1080px;
  margin: 0 auto;
}

.container {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
}

.page-header {
  padding: var(--spacing-md);
  padding-top: calc(var(--spacing-md) + var(--safe-area-inset-top));
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
}

.page-content {
  flex: 1;
  padding: var(--spacing-md);
  padding-bottom: calc(var(--bottom-nav-height) + var(--spacing-md) + var(--safe-area-inset-bottom));
}

/* ============================================================================
   CARDS & SURFACES
   ========================================================================== */

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

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

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
}

.card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

.card-body {
  padding: var(--spacing-md) 0;
}

.card-footer {
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
  margin-top: var(--spacing-md);
}

/* Recommendation cards */
.recommendation-card {
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-light) 100%);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  color: white;
  box-shadow: var(--shadow-lg);
}

.recommendation-card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
}

.recommendation-card-text {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.9);
}

/* ============================================================================
   BUTTONS
   ========================================================================== */

button, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: var(--touch-target);
  text-decoration: none;
  user-select: none;
  gap: var(--spacing-sm);
}

/* Primary button */
.btn-primary {
  background-color: var(--accent-primary);
  color: white;
  border: 2px solid var(--accent-primary);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: var(--shadow-md);
}

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

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Secondary button */
.btn-secondary {
  background-color: transparent;
  color: var(--accent-primary);
  border: 2px solid var(--accent-primary);
}

.btn-secondary:hover {
  background-color: var(--bg-card);
  border-color: var(--accent-hover);
  color: var(--accent-hover);
}

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

/* Danger button */
.btn-danger {
  background-color: var(--danger);
  color: white;
  border: 2px solid var(--danger);
}

.btn-danger:hover {
  background-color: var(--danger-light);
  border-color: var(--danger-light);
  box-shadow: var(--shadow-md);
}

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

/* Success button */
.btn-success {
  background-color: var(--success);
  color: white;
  border: 2px solid var(--success);
}

.btn-success:hover {
  background-color: var(--success-light);
  border-color: var(--success-light);
  box-shadow: var(--shadow-md);
}

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

/* Ghost button */
.btn-ghost {
  background-color: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-ghost:hover {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-light);
}

/* Small button */
.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
}

/* Large button */
.btn-lg {
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: var(--font-size-lg);
}

/* Full width button */
.btn-block {
  width: 100%;
  display: flex;
}

/* Button group */
.button-group {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* ============================================================================
   FORMS & INPUTS
   ========================================================================== */

form {
  width: 100%;
}

.form-group {
  display: flex;
  flex-direction: column;
  margin-bottom: var(--spacing-lg);
}

label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

input, textarea, select {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: var(--touch-target);
}

input::placeholder, textarea::placeholder {
  color: var(--text-tertiary);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent-primary);
  background-color: var(--bg-card);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

input:disabled, textarea:disabled, select:disabled {
  background-color: var(--bg-secondary);
  color: var(--text-tertiary);
  cursor: not-allowed;
  opacity: 0.6;
}

textarea {
  resize: vertical;
  min-height: 120px;
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%23a29bfe' d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-md) center;
  padding-right: var(--spacing-2xl);
}

.form-error {
  color: var(--danger);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
}

.form-help {
  color: var(--text-tertiary);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
}

/* ============================================================================
   TOGGLE SWITCHES
   ========================================================================== */

.switch {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-md);
  cursor: pointer;
}

.switch-input {
  appearance: none;
  width: 52px;
  height: 28px;
  background-color: var(--border-color);
  border-radius: var(--radius-full);
  cursor: pointer;
  position: relative;
  border: none;
  transition: background-color var(--transition-fast);
  flex-shrink: 0;
}

.switch-input::before {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--bg-card);
  top: 2px;
  left: 2px;
  transition: left var(--transition-fast), background-color var(--transition-fast);
}

.switch-input:checked {
  background-color: var(--accent-primary);
}

.switch-input:checked::before {
  left: 26px;
}

.switch-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.switch-label {
  font-size: var(--font-size-base);
  color: var(--text-primary);
  user-select: none;
}

/* ============================================================================
   MODALS & OVERLAYS
   ========================================================================== */

.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-overlay);
  z-index: var(--z-overlay);
  backdrop-filter: blur(4px);
}

.modal-overlay.active {
  display: flex;
  align-items: flex-end;
  animation: fadeIn var(--transition-base);
}

.modal {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
  width: 100%;
  max-width: 100%;
  padding: var(--spacing-lg);
  padding-bottom: calc(var(--spacing-lg) + var(--safe-area-inset-bottom));
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp var(--transition-base);
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: var(--font-size-xl);
  padding: 0;
  min-height: auto;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-body {
  flex: 1;
  margin-bottom: var(--spacing-lg);
}

.modal-footer {
  display: flex;
  gap: var(--spacing-md);
  flex-direction: column;
}

/* Modal animations */
@keyframes slideUp {
  from {
    transform: translateY(100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ============================================================================
   TABS COMPONENT
   ========================================================================== */

.tabs {
  display: flex;
  flex-direction: column;
}

.tabs-nav {
  display: flex;
  border-bottom: 2px solid var(--border-color);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: 0;
}

.tabs-nav-item {
  flex: 1;
  min-width: 100px;
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  background: none;
  color: var(--text-secondary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
}

.tabs-nav-item.active {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
}

.tabs-nav-item:hover:not(.active) {
  color: var(--text-primary);
}

.tabs-content {
  display: none;
}

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

/* ============================================================================
   BOTTOM NAVIGATION
   ========================================================================== */

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-height);
  padding-bottom: var(--safe-area-inset-bottom);
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  z-index: var(--z-nav-bottom);
  display: flex;
  justify-content: space-around;
  align-items: flex-start;
  gap: 0;
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: var(--spacing-sm) 0;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: var(--font-size-xs);
  cursor: pointer;
  transition: color var(--transition-fast);
  min-height: var(--bottom-nav-height);
  gap: var(--spacing-xs);
  text-decoration: none;
}

.bottom-nav-item.active {
  color: var(--accent-primary);
}

.bottom-nav-item:hover {
  color: var(--accent-light);
}

.bottom-nav-icon {
  font-size: var(--font-size-xl);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.bottom-nav-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
}

/* ============================================================================
   EXERCISE ITEMS & SET LOG
   ========================================================================== */

.exercise-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.exercise-item:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow-md);
}

.exercise-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-lg);
}

.exercise-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
}

.exercise-meta {
  display: flex;
  gap: var(--spacing-lg);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.exercise-sets {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* Set log row grid */
.set-log-row {
  display: grid;
  grid-template-columns: 40px 60px 60px 60px 44px;
  gap: var(--spacing-sm);
  align-items: center;
  padding: var(--spacing-md);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
}

.set-number {
  font-weight: var(--font-weight-semibold);
  color: var(--text-secondary);
  text-align: center;
}

.set-weight {
  padding: var(--spacing-sm);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--text-primary);
}

.set-reps {
  padding: var(--spacing-sm);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--text-primary);
}

.set-prev {
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

.set-check {
  background: none;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  width: 28px;
  height: 28px;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.set-check:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.set-check.checked {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
}

/* Set log header */
.set-log-header {
  display: grid;
  grid-template-columns: 40px 60px 60px 60px 44px;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--text-tertiary);
  text-transform: uppercase;
  text-align: center;
}

/* ============================================================================
   STATS BLOCKS & PROGRESS
   ========================================================================== */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.stat-block {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
}

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--accent-primary);
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  text-transform: uppercase;
  font-weight: var(--font-weight-medium);
}

.stat-change {
  font-size: var(--font-size-xs);
  margin-top: var(--spacing-sm);
  padding: var(--spacing-sm) 0;
}

.stat-change.positive {
  color: var(--success);
}

.stat-change.negative {
  color: var(--danger);
}

/* Progress bar */
.progress-bar-wrapper {
  margin: var(--spacing-lg) 0;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--bg-secondary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-light));
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

/* Streak dots */
.streak-dots {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.streak-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--bg-card);
  border: 2px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.streak-dot.active {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-light));
  border-color: var(--accent-primary);
  color: white;
}

.streak-dot:hover {
  border-color: var(--accent-light);
}

/* ============================================================================
   CHIPS & TAGS
   ========================================================================== */

.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.chip:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.chip.active {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: white;
}

.chip.removable {
  padding-right: var(--spacing-sm);
}

.chip-remove {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  font-size: var(--font-size-base);
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: auto;
}

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

/* ============================================================================
   REST TIMER OVERLAY
   ========================================================================== */

.rest-timer-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-overlay);
  backdrop-filter: blur(8px);
  z-index: var(--z-modal);
  align-items: center;
  justify-content: center;
}

.rest-timer-overlay.active {
  display: flex;
}

.rest-timer {
  text-align: center;
}

.rest-timer-display {
  font-size: 5rem;
  font-weight: var(--font-weight-bold);
  color: var(--accent-primary);
  margin-bottom: var(--spacing-lg);
  font-variant-numeric: tabular-nums;
}

.rest-timer-label {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

.rest-timer-controls {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
}

/* ============================================================================
   CHART CONTAINERS
   ========================================================================== */

.chart-container {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.chart-placeholder {
  text-align: center;
  color: var(--text-tertiary);
  font-size: var(--font-size-sm);
}

/* ============================================================================
   ADMIN USER LIST
   ========================================================================== */

.user-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.user-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: border-color var(--transition-fast);
}

.user-list-item:hover {
  border-color: var(--border-light);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex: 1;
}

.user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

.user-details {
  flex: 1;
}

.user-name {
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.user-email {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.user-status {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.status-badge {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--success);
}

.status-badge.offline {
  background-color: var(--text-tertiary);
}

/* ============================================================================
   AUTH SCREENS
   ========================================================================== */

.auth-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  background-color: var(--bg-primary);
}

.auth-container {
  width: 100%;
  max-width: 360px;
}

.auth-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.auth-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.auth-subtitle {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.auth-divider {
  text-align: center;
  margin: var(--spacing-lg) 0;
  position: relative;
}

.auth-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--border-color);
}

.auth-divider span {
  background-color: var(--bg-primary);
  padding: 0 var(--spacing-md);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  position: relative;
}

.auth-footer {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.auth-footer a {
  color: var(--accent-primary);
}

.access-denied {
  text-align: center;
}

.access-denied-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-lg);
  color: var(--danger);
}

.access-denied-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.access-denied-message {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.6;
}

/* ============================================================================
   EMPTY STATES
   ========================================================================== */

.empty-state {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-lg);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-lg);
  color: var(--text-tertiary);
}

.empty-state-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.empty-state-message {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.empty-state-action {
  display: flex;
  justify-content: center;
}

/* ============================================================================
   SCROLLBAR STYLING
   ========================================================================== */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background-color: transparent;
}

::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: var(--radius-full);
  transition: background-color var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--border-light);
}

/* Firefox scrollbar */
* {
  scrollbar-color: var(--border-color) transparent;
  scrollbar-width: thin;
}

/* ============================================================================
   UTILITY CLASSES
   ========================================================================== */

/* Display */
.hidden {
  display: none !important;
}

.block {
  display: block !important;
}

.inline {
  display: inline !important;
}

.inline-block {
  display: inline-block !important;
}

.flex {
  display: flex !important;
}

.inline-flex {
  display: inline-flex !important;
}

.grid {
  display: grid !important;
}

.hidden-mobile {
  display: none;
}

@media (min-width: 768px) {
  .hidden-mobile {
    display: block;
  }
}

/* Flexbox utilities */
.flex-row {
  flex-direction: row !important;
}

.flex-col {
  flex-direction: column !important;
}

.flex-wrap {
  flex-wrap: wrap !important;
}

.flex-nowrap {
  flex-wrap: nowrap !important;
}

.justify-start {
  justify-content: flex-start !important;
}

.justify-center {
  justify-content: center !important;
}

.justify-end {
  justify-content: flex-end !important;
}

.justify-between {
  justify-content: space-between !important;
}

.justify-around {
  justify-content: space-around !important;
}

.items-start {
  align-items: flex-start !important;
}

.items-center {
  align-items: center !important;
}

.items-end {
  align-items: flex-end !important;
}

.items-stretch {
  align-items: stretch !important;
}

.flex-1 {
  flex: 1 !important;
}

.flex-shrink-0 {
  flex-shrink: 0 !important;
}

/* Gap utilities */
.gap-xs {
  gap: var(--spacing-xs) !important;
}

.gap-sm {
  gap: var(--spacing-sm) !important;
}

.gap-md {
  gap: var(--spacing-md) !important;
}

.gap-lg {
  gap: var(--spacing-lg) !important;
}

.gap-xl {
  gap: var(--spacing-xl) !important;
}

/* Margin utilities */
.m-0 {
  margin: 0 !important;
}

.m-xs {
  margin: var(--spacing-xs) !important;
}

.m-sm {
  margin: var(--spacing-sm) !important;
}

.m-md {
  margin: var(--spacing-md) !important;
}

.m-lg {
  margin: var(--spacing-lg) !important;
}

.m-xl {
  margin: var(--spacing-xl) !important;
}

.mt-0 {
  margin-top: 0 !important;
}

.mt-xs {
  margin-top: var(--spacing-xs) !important;
}

.mt-sm {
  margin-top: var(--spacing-sm) !important;
}

.mt-md {
  margin-top: var(--spacing-md) !important;
}

.mt-lg {
  margin-top: var(--spacing-lg) !important;
}

.mt-xl {
  margin-top: var(--spacing-xl) !important;
}

.mb-0 {
  margin-bottom: 0 !important;
}

.mb-xs {
  margin-bottom: var(--spacing-xs) !important;
}

.mb-sm {
  margin-bottom: var(--spacing-sm) !important;
}

.mb-md {
  margin-bottom: var(--spacing-md) !important;
}

.mb-lg {
  margin-bottom: var(--spacing-lg) !important;
}

.mb-xl {
  margin-bottom: var(--spacing-xl) !important;
}

.mx-auto {
  margin-left: auto !important;
  margin-right: auto !important;
}

/* Padding utilities */
.p-0 {
  padding: 0 !important;
}

.p-xs {
  padding: var(--spacing-xs) !important;
}

.p-sm {
  padding: var(--spacing-sm) !important;
}

.p-md {
  padding: var(--spacing-md) !important;
}

.p-lg {
  padding: var(--spacing-lg) !important;
}

.p-xl {
  padding: var(--spacing-xl) !important;
}

.px-md {
  padding-left: var(--spacing-md) !important;
  padding-right: var(--spacing-md) !important;
}

.py-md {
  padding-top: var(--spacing-md) !important;
  padding-bottom: var(--spacing-md) !important;
}

/* Width utilities */
.w-full {
  width: 100% !important;
}

.w-auto {
  width: auto !important;
}

.max-w-sm {
  max-width: 360px !important;
}

.max-w-md {
  max-width: 480px !important;
}

.max-w-lg {
  max-width: 640px !important;
}

/* Height utilities */
.h-full {
  height: 100% !important;
}

.h-auto {
  height: auto !important;
}

.min-h-screen {
  min-height: 100vh !important;
}

/* Text utilities */
.text-center {
  text-align: center !important;
}

.text-left {
  text-align: left !important;
}

.text-right {
  text-align: right !important;
}

.text-xs {
  font-size: var(--font-size-xs) !important;
}

.text-sm {
  font-size: var(--font-size-sm) !important;
}

.text-base {
  font-size: var(--font-size-base) !important;
}

.text-lg {
  font-size: var(--font-size-lg) !important;
}

.text-xl {
  font-size: var(--font-size-xl) !important;
}

.text-2xl {
  font-size: var(--font-size-2xl) !important;
}

.text-3xl {
  font-size: var(--font-size-3xl) !important;
}

.font-normal {
  font-weight: var(--font-weight-normal) !important;
}

.font-medium {
  font-weight: var(--font-weight-medium) !important;
}

.font-semibold {
  font-weight: var(--font-weight-semibold) !important;
}

.font-bold {
  font-weight: var(--font-weight-bold) !important;
}

.text-primary {
  color: var(--text-primary) !important;
}

.text-secondary {
  color: var(--text-secondary) !important;
}

.text-tertiary {
  color: var(--text-tertiary) !important;
}

.text-accent {
  color: var(--accent-primary) !important;
}

.text-success {
  color: var(--success) !important;
}

.text-danger {
  color: var(--danger) !important;
}

.text-warning {
  color: var(--warning) !important;
}

.opacity-50 {
  opacity: 0.5 !important;
}

.opacity-75 {
  opacity: 0.75 !important;
}

/* Background utilities */
.bg-primary {
  background-color: var(--bg-primary) !important;
}

.bg-secondary {
  background-color: var(--bg-secondary) !important;
}

.bg-card {
  background-color: var(--bg-card) !important;
}

.bg-accent {
  background-color: var(--accent-primary) !important;
}

/* Border utilities */
.border {
  border: 1px solid var(--border-color) !important;
}

.border-t {
  border-top: 1px solid var(--border-color) !important;
}

.border-b {
  border-bottom: 1px solid var(--border-color) !important;
}

.rounded-sm {
  border-radius: var(--radius-sm) !important;
}

.rounded-md {
  border-radius: var(--radius-md) !important;
}

.rounded-lg {
  border-radius: var(--radius-lg) !important;
}

.rounded-full {
  border-radius: var(--radius-full) !important;
}

/* ============================================================================
   RESPONSIVE DESIGN - TABLET
   ========================================================================== */

@media (min-width: 640px) {
  .container {
    max-width: 640px;
  }

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

  .modal {
    max-width: 500px;
    border-radius: var(--radius-xl);
    margin: var(--spacing-lg);
  }

  .auth-container {
    max-width: 420px;
  }
}

/* ============================================================================
   RESPONSIVE DESIGN - DESKTOP
   ========================================================================== */

@media (min-width: 768px) {
  main {
    padding: var(--spacing-xl);
  }

  .container {
    max-width: 768px;
  }

  .page-content {
    padding: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
  }

  .bottom-nav {
    display: none;
  }

  .page-content {
    padding-bottom: var(--spacing-xl);
  }

  .stats-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .modal-overlay {
    align-items: center;
    justify-content: center;
  }

  .modal {
    max-width: 600px;
    border-radius: var(--radius-2xl);
    max-height: 80vh;
  }

  .set-log-row {
    grid-template-columns: 50px 80px 80px 80px 60px;
  }

  .set-log-header {
    grid-template-columns: 50px 80px 80px 80px 60px;
  }
}

/* ============================================================================
   PRINT STYLES
   ========================================================================== */

@media print {
  * {
    background: white !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  a, a:visited {
    text-decoration: underline;
  }

  a[href]::after {
    content: " (" attr(href) ")";
  }

  img {
    max-width: 100% !important;
  }

  @page {
    margin: 2cm;
  }

  .no-print, .bottom-nav {
    display: none !important;
  }
}

/* ============================================================================
   DARK MODE PREFERENCE (SYSTEM)
   ========================================================================== */

@media (prefers-color-scheme: dark) {
  /* Already dark by default */
}

@media (prefers-color-scheme: light) {
  /* If system prefers light and no theme is set */
  html:not([data-theme="dark"]) {
    color-scheme: light;
  }
}

/* ============================================================================
   REDUCED MOTION
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}