/* css/main.css - Modern Gym Tracker Styles */

/* ===== CSS Variables ===== */
:root {
    /* Colors */
    --primary: #4CAF50;
    --primary-dark: #388E3C;
    --primary-light: #66BB6A;
    --secondary: #2196F3;
    --danger: #F44336;
    --warning: #FF9800;
    --success: #4CAF50;
    --info: #2196F3;
    
    /* Neutrals */
    --white: #FFFFFF;
    --black: #000000;
    --gray-50: #FAFAFA;
    --gray-100: #F5F5F5;
    --gray-200: #EEEEEE;
    --gray-300: #E0E0E0;
    --gray-400: #BDBDBD;
    --gray-500: #9E9E9E;
    --gray-600: #757575;
    --gray-700: #616161;
    --gray-800: #424242;
    --gray-900: #212121;
    
    /* Dark mode colors */
    --dark-bg: #121212;
    --dark-surface: #1E1E1E;
    --dark-surface-2: #2C2C2C;
    --dark-border: #373737;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Z-index */
    --z-header: 100;
    --z-nav: 90;
    --z-modal: 1000;
    --z-toast: 1100;
    --z-rest-timer: 1050;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: var(--dark-bg);
        --bg-secondary: var(--dark-surface);
        --bg-tertiary: var(--dark-surface-2);
        --text-primary: var(--gray-100);
        --text-secondary: var(--gray-400);
        --border-color: var(--dark-border);
    }
}

/* Light mode */
@media (prefers-color-scheme: light) {
    :root {
        --bg-primary: var(--white);
        --bg-secondary: var(--gray-50);
        --bg-tertiary: var(--gray-100);
        --text-primary: var(--gray-900);
        --text-secondary: var(--gray-600);
        --border-color: var(--gray-300);
    }
}

/* ===== Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== Header ===== */
.app-header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: var(--z-header);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.app-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    margin: 3px 0;
    transition: var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Navigation ===== */
.app-nav {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 60px;
    z-index: var(--z-nav);
}

.nav-links {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.nav-links::-webkit-scrollbar {
    display: none;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-secondary);
    white-space: nowrap;
    transition: var(--transition-base);
    border: 1px solid transparent;
}

.nav-link:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-link.active {
    background-color: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.nav-icon {
    font-size: 1.25rem;
}

.nav-text {
    font-size: 0.875rem;
    font-weight: 500;
}

/* ===== Main Content ===== */
.app-main {
    min-height: calc(100vh - 120px);
    padding: var(--spacing-lg) 0;
}

.page {
    display: none;
}

.page.active {
    display: block;
    animation: fadeIn var(--transition-slow);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: var(--transition-base);
}

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

.stat-icon {
    font-size: 2rem;
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ===== Quick Actions ===== */
.quick-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.quick-action-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-base);
}

.quick-action-btn:hover {
    background-color: var(--bg-tertiary);
    transform: translateY(-1px);
}

.quick-action-btn.primary {
    background-color: var(--primary);
    border-color: var(--primary);
    color: var(--white);
}

.quick-action-btn.primary:hover {
    background-color: var(--primary-dark);
}

.btn-icon {
    font-size: 1.25rem;
}

/* ===== Sections ===== */
.section {
    margin-bottom: var(--spacing-xl);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.section-link {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
}

.section-link:hover {
    text-decoration: underline;
}

/* ===== Templates Grid ===== */
.templates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.template-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: var(--transition-base);
}

.template-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

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

.template-name {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.template-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xs);
}

.template-badge {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

.template-exercises {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

.template-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.template-stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ===== Exercises Grid ===== */
.exercises-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.exercise-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    cursor: pointer;
    transition: var(--transition-base);
}

.exercise-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.exercise-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.exercise-name {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.exercise-muscle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ===== Page Headers ===== */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
}

/* ===== Filters ===== */
.filters {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.search-input,
.filter-select {
    flex: 1;
    min-width: 200px;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-primary);
    transition: var(--transition-base);
}

.search-input:focus,
.filter-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-base);
    text-decoration: none;
}

.btn:hover {
    background-color: var(--bg-tertiary);
    transform: translateY(-1px);
}

.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
    color: var(--white);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
}

.btn-secondary {
    background-color: transparent;
    border-color: var(--border-color);
}

.btn-block {
    display: flex;
    width: 100%;
    justify-content: center;
}

/* ===== Modals ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal);
    padding: var(--spacing-md);
    overflow-y: auto;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn var(--transition-fast);
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: slideUp var(--transition-base);
}

.modal-content.workout-modal {
    max-width: 600px;
}

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

.modal-header {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 14px 0 14px;
    min-height: 56px;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 2.2rem;
    color: #bbb;
    cursor: pointer;
    line-height: 1;
    z-index: 2;
    margin-left: 16px;
}

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

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.modal-footer .btn {
    flex: 1;
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.form-input,
.form-select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-primary);
    transition: var(--transition-base);
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

/* ===== Selected Exercises ===== */
.selected-exercises {
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    min-height: 100px;
}

.selected-exercise {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.selected-exercise:last-child {
    margin-bottom: 0;
}

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

.exercise-sets {
    display: flex;
    gap: var(--spacing-xs);
}

.set-input {
    width: 60px;
    padding: var(--spacing-xs);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    text-align: center;
}

.remove-exercise {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition-base);
}

.remove-exercise:hover {
    background-color: rgba(244, 67, 54, 0.1);
}

/* ===== Exercise Selection ===== */
.exercise-select-list {
    max-height: 400px;
    overflow-y: auto;
    margin-top: var(--spacing-md);
}

.exercise-select-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition-base);
}

.exercise-select-item:hover {
    background-color: var(--bg-tertiary);
}

.exercise-select-item.selected {
    background-color: rgba(76, 175, 80, 0.1);
}

.exercise-checkbox {
    width: 20px;
    height: 20px;
    margin-right: var(--spacing-md);
}

/* ===== Workout Modal ===== */
.workout-timer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}
#workout-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: #fff;
    flex: 1;
}

#workout-timer-box {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background: #232323;
    border-radius: 14px;
    font-size: 1.1rem;
    color: #36c146;
    font-weight: bold;
    padding: 4px 18px 4px 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 2px 10px 0 rgba(0,0,0,0.05);
    z-index: 2;
    min-width: unset;
    width: auto;      /* QUAN TRỌNG: không cho nó kéo dài full header */
    max-width: 220px; /* hoặc nhỏ hơn nữa nếu bạn muốn */
}

.timer-icon {
    font-size: 1.05rem;
    margin-right: 2px;
}

.timer-text {
    color: #36c146;
    font-weight: bold;
    font-size: 1.05rem;
    letter-spacing: 1px;
}
#workout-timer-box {
    box-sizing: border-box;
    justify-content: center;
}
.workout-exercises {
    max-height: 400px;
    overflow-y: auto;
}

.workout-exercise {
    padding: var(--spacing-lg); /* giữ padding ngoài cùng */
}

.workout-exercise-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 34px;
}
.exercise-actions {
  margin-left: 8px;
  display: flex;
  align-items: center;
  position: relative;
}
.workout-exercise-name {
  font-size: 1.13em;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 160px;
}

.sets-table {
    width: 100%;
    display: block;
    padding: 0;  /* KHÔNG padding ở đây */
}
.set-block {
    margin-bottom: 10px;
    width: 100%;
    padding: 0;  /* KHÔNG padding ở đây */
}
.set-row {
    border-bottom: 1px solid var(--border-color);
}

.set-row:last-child > * {
    border-bottom: none;
}

.set-row-header {
    border-bottom: 1px solid var(--border-color);
}
.set-block.set-completed .set-row {
    background: var(--primary-dark);
    color: #fff;
    font-weight: 700;
    border-radius: 12px 12px 12px 12px;
    /* Nếu muốn bo góc tròn cho riêng dòng nhập: */
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    transition: background 0.3s;
    position: relative;
    z-index: 1;
}
/* Input trong dòng completed */
.set-block.set-completed .set-row input {
    color: #fff !important;
    background: rgba(255,255,255,0.08) !important;
    font-weight: 700 !important;
    border-color: var(--primary-light) !important;
    caret-color: #fff !important;
}
.set-block .rest-bar {
    background: var(--bg-tertiary);
    color: var(--primary-dark);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    opacity: 1;
}
/* Checkbox completed */
.set-block.set-completed .set-row .complete-checkbox {
    accent-color: var(--primary-light);
    color: #fff;
}
.set-number {
    width: 50px;
    font-weight: 600;
}
.set-number, .set-previous, .set-weight, .set-reps, .set-complete {
    flex: 0 0 55px; /* hoặc tùy chỉnh */
}
.set-weight, .set-reps {
    flex: 0 0 80px;
}
.set-complete {
    flex: 0 0 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.set-weight input,
.set-reps input {
    width: 100%;
    padding: var(--spacing-xs);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    text-align: center;
}

.set-complete {
    flex: 0 0 40px;
}
.rest-bar-wrap {
    margin: 2px 0 10px 0;
}
.complete-checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* ===== History ===== */
.history-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.history-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: var(--transition-base);
}

.history-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.history-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
}

.history-date {
    font-weight: 600;
}

.history-template {
    color: var(--primary);
    font-weight: 500;
}

.history-stats {
    display: flex;
    gap: var(--spacing-lg);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ===== Rest Timer ===== */
.rest-timer {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    background-color: var(--primary);
    color: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-rest-timer);
    transform: translateY(200%);
    transition: transform var(--transition-base);
}

.rest-timer.active {
    transform: translateY(0);
}

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

.rest-timer-label {
    font-size: 0.875rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-xs);
}

.rest-timer-time {
    font-size: 2rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    margin-bottom: var(--spacing-md);
}

.rest-timer-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.rest-timer-btn {
    flex: 1;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-sm);
    color: var(--white);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition-base);
}

.rest-timer-btn:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

/* ===== Toast ===== */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-toast);
}

.toast {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    animation: slideInRight var(--transition-base);
}

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.toast.success {
    border-color: var(--success);
    background-color: rgba(76, 175, 80, 0.1);
}

.toast.error {
    border-color: var(--danger);
    background-color: rgba(244, 67, 54, 0.1);
}

.toast.warning {
    border-color: var(--warning);
    background-color: rgba(255, 152, 0, 0.1);
}

.toast-icon {
    font-size: 1.25rem;
}

.toast-message {
    flex: 1;
    font-size: 0.875rem;
}

/* ===== Empty States ===== */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
}

.empty-icon {
    font-size: 3rem;
    opacity: 0.3;
    margin-bottom: var(--spacing-md);
}

.empty-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.empty-text {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav-text {
        display: none;
    }
    
    .nav-links {
        justify-content: space-around;
        padding: var(--spacing-sm);
    }
    
    .nav-link {
        padding: var(--spacing-sm);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .quick-actions {
        flex-direction: column;
    }
    
    .templates-grid {
        grid-template-columns: 1fr;
    }
    
    .exercises-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        margin: var(--spacing-sm);
        max-height: calc(100vh - var(--spacing-lg));
    }
    
    .rest-timer {
        left: var(--spacing-md);
        right: var(--spacing-md);
        bottom: var(--spacing-md);
    }
    
    .toast-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
        top: auto;
        bottom: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .app-title {
        font-size: 1.25rem;
    }
    
    .page-title {
        font-size: 1.25rem;
    }
    
    .stat-value {
        font-size: 1.25rem;
    }
    
    .exercises-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Utilities ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-secondary); }
.text-primary { color: var(--primary); }
.text-danger { color: var(--danger); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.set-row.set-completed {
    background-color: var(--primary-dark);
    color: var(--white) !important;
    font-weight: 700;
    transition: background-color 0.3s;
}
.set-row.set-completed input[type="number"] {
    color: var(--white) !important;       /* chữ trắng */
    font-weight: 700 !important;  /* đậm */
    background: rgba(255,255,255,0.08) !important; /* nhẹ dịu */
    border-color: var(--primary-light) !important;
    caret-color: #fff !important;
}

.set-row.set-completed input[type="number"]::placeholder {
    color: var(--white) !important;
    opacity: 1;
}
.set-row.set-completed input {
    background: rgba(255,255,255,0.05);
    color: var(--white);
}
.set-row.set-completed .complete-checkbox {
    accent-color: var(--primary-light);
	color: var(--white)
}
.set-rest-row {
    display: block; /* hoặc flex */
    width: 100%;p
}

.rest-bar {
    width: 100%;
    min-height: 28px;
    position: relative;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 4px 0;
    box-shadow: 0 1px 5px 0 rgba(0,0,0,0.11);
    transition: background 0.2s;
}

.rest-bar-timer {
    position: relative;
    z-index: 2;
    font-weight: 700;
    color: var(--primary-dark); /* màu xanh đậm */
    font-size: 1.1rem;
    letter-spacing: 1px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.10);
}

.rest-progress-bar {
    position: absolute;
    left: 0; top: 0; bottom: 0;
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, var(--primary-light) 0%, var(--primary) 100%);
    opacity: 0.33;
    z-index: 1;
    border-radius: var(--radius-full);
    transition: width 1s linear;
    pointer-events: none;
}
/* Luôn cho input màu trắng ở darkmode */
@media (prefers-color-scheme: dark) {
    .set-weight input,
    .set-reps input {
        color: #fff !important;
        background: rgba(255,255,255,0.08) !important;
        border-color: var(--gray-700) !important;
        caret-color: #fff !important;
        font-weight: 600;
    }
    .set-weight input::placeholder,
    .set-reps input::placeholder {
        color: #aaa !important;
        opacity: 1;
    }
}
/* Riêng set completed thì đậm hơn nữa */
.set-block.set-completed {
    background: var(--primary-dark);
    color: #fff;
    border-radius: 12px;
    font-weight: 700;
    transition: background 0.3s;
    /* Optional: thêm bóng cho nổi */
    box-shadow: 0 2px 16px 0 rgba(76,175,80,0.11);
}
.set-block.set-completed input,
.set-block.set-completed input[type="number"] {
    color: #fff !important;
    background: rgba(255,255,255,0.08) !important;
    font-weight: 700 !important;
    border-color: var(--primary-light) !important;
    caret-color: #fff !important;
}
.set-block.set-completed input::placeholder {
    color: #fff !important;
    opacity: 1;
}
.set-block.set-completed .complete-checkbox {
    accent-color: var(--primary-light);
    color: #fff;
}
.set-row, .set-row-header {
    display: flex;
    align-items: center;
    width: 100%;
}
.set-block.set-completed .set-row > * {
    border-bottom: none !important;
}
.set-block:last-child .set-row > * {
    border-bottom: none !important;
}
.set-block.set-completed .set-row > * {
    border-bottom: none !important;
}
.set-number,
.set-previous,
.set-weight,
.set-reps,
.set-complete {
    flex: 0 0 60px;
    text-align: center;
}

.set-previous { flex: 1 1 100px; text-align: left;}
.set-weight, .set-reps { flex: 0 0 80px; }
.set-complete { flex: 0 0 32px; }

.add-set-row {
    text-align: right;
    margin-top: 6px;
}
.btn-ex-action {
  background: none;
  border: none;
  font-size: 1.4rem;
  color: var(--text-secondary);
  border-radius: 50%;
  padding: 4px 8px;
  cursor: pointer;
  transition: background 0.18s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-ex-action:hover {
    background: var(--bg-tertiary);
    color: var(--primary);
}

.exercise-menu {
    position: absolute;
    top: 36px;
    right: 0;
    min-width: 200px;
    background: var(--bg-secondary);
    border-radius: 14px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.18);
    z-index: 100;
    padding: 10px 0;
    display: none;
    flex-direction: column;
    animation: fadeIn 0.16s;
}

.exercise-menu button {
    background: none;
    border: none;
    width: 100%;
    padding: 10px 18px;
    text-align: left;
    color: var(--text-primary);
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 9px;
    cursor: pointer;
    transition: background 0.13s;
}

.exercise-menu button:hover {
    background: var(--bg-tertiary);
    color: var(--primary);
}

.exercise-menu .danger {
    color: var(--danger);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px);}
    to { opacity: 1; transform: translateY(0);}
}

.context-menu {
    min-width: 120px;
    background: var(--bg-primary, #232323);
    border-radius: 12px;
    box-shadow: 0 6px 32px 0 rgba(0,0,0,0.18);
    padding: 6px 0;
    display: flex;
    flex-direction: column;
    position: absolute;
    z-index: 1200;
    border: 1.5px solid var(--bg-tertiary, #353535);
}
.context-menu-btn {
    background: none;
    border: none;
    text-align: left;
    width: 100%;
    padding: 12px 18px;
    font-size: 1rem;
    color: var(--text-primary, #eee);
    cursor: pointer;
    transition: background 0.13s, color 0.12s;
}
.context-menu-btn.selected, .context-menu-btn:hover {
    background: var(--primary, #2ecc40);
    color: #fff;
    font-weight: bold;
}

/* Additional CSS for new features */

/* PWA Install Banner */
.install-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--primary);
    color: white;
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1200;
    animation: slideDown 0.3s ease;
}

.install-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    max-width: 600px;
    width: 100%;
}

.install-banner .btn-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    margin-left: auto;
}

/* Offline Indicator */
.offline-indicator {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    background: var(--warning);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    z-index: 1100;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* AI Suggestion Banner */
.ai-suggestion-banner {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
    color: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    animation: slideInLeft 0.3s ease;
}

.ai-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.ai-icon {
    font-size: 2rem;
}

.ai-text {
    flex: 1;
}

.ai-text strong {
    display: block;
    margin-bottom: var(--spacing-xs);
}

/* Analytics Page */
.time-range-selector {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    background: var(--bg-secondary);
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    width: fit-content;
}

.time-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-secondary);
}

.time-btn:hover {
    background: var(--bg-tertiary);
}

.time-btn.active {
    background: var(--primary);
    color: white;
}

/* Charts */
.chart-container {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    height: 400px;
    position: relative;
}

.chart-container h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
    color: var(--text-primary);
}

.chart-container canvas {
    max-height: 320px;
}

/* PR List */
.pr-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.pr-item {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-left: 3px solid var(--primary);
}

.pr-item .pr-icon {
    font-size: 1.5rem;
}

.pr-details {
    flex: 1;
}

.pr-exercise {
    font-weight: 600;
    color: var(--text-primary);
}

.pr-stats {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* View Toggle */
.view-toggle {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    background: var(--bg-secondary);
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    width: fit-content;
}

.view-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-secondary);
}

.view-btn:hover {
    background: var(--bg-tertiary);
}

.view-btn.active {
    background: var(--primary);
    color: white;
}

/* Calendar View */
.calendar-view {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

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

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1px;
    background: var(--border-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.calendar-day {
    background: var(--bg-primary);
    padding: var(--spacing-sm);
    min-height: 80px;
    position: relative;
}

.calendar-day.has-workout {
    background: rgba(76, 175, 80, 0.1);
}

.calendar-day-number {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.calendar-workout {
    font-size: 0.75rem;
    color: var(--primary);
    cursor: pointer;
}

/* Settings Sections */
.settings-section {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.settings-section:last-child {
    border-bottom: none;
}

.settings-section h4 {
    margin-bottom: var(--spacing-md);
    color: var(--primary);
}

.toggle-setting,
.radio-setting {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    cursor: pointer;
}

.toggle-setting input[type="checkbox"],
.radio-setting input[type="radio"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* Provider Config */
.provider-config {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.provider-config h4 {
    margin-bottom: var(--spacing-md);
}

.onedrive-status {
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
}

/* Sync Status */
.sync-status {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.sync-status h4 {
    margin-bottom: var(--spacing-md);
}

#sync-status-info {
    margin-bottom: var(--spacing-md);
}

#sync-status-info p {
    margin-bottom: var(--spacing-xs);
}

#sync-status-info span {
    font-weight: 600;
    color: var(--primary);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.icon-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1.25rem;
}

.icon-btn:hover {
    background: var(--bg-tertiary);
}

/* PR Notification Animation */
.pr-notification {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    background: var(--primary);
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: 1200;
    animation: prPop 0.5s ease forwards;
}

@keyframes prPop {
    0% { transform: translate(-50%, -50%) scale(0); }
    50% { transform: translate(-50%, -50%) scale(1.2); }
    100% { transform: translate(-50%, -50%) scale(1); }
}

.pr-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.pr-icon {
    font-size: 4rem;
    animation: bounce 0.5s ease infinite alternate;
}

@keyframes bounce {
    0% { transform: translateY(0); }
    100% { transform: translateY(-10px); }
}

.pr-text {
    font-size: 1.5rem;
    font-weight: 700;
}

/* Responsive Updates */
@media (max-width: 768px) {
    .analytics-grid {
        grid-template-columns: 1fr;
    }
    
    .chart-container {
        height: 300px;
    }
    
    .install-content {
        flex-direction: column;
        text-align: center;
    }
    
    .ai-content {
        flex-direction: column;
        text-align: center;
    }
    
    .header-actions .menu-toggle {
        display: flex;
    }
}
.rest-bar, .rest-bar-wrap, .set-block {
  width: 100% !important;
  box-sizing: border-box;
  margin-left: 0 !important;
  margin-right: 0 !important;
}
.chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 6px;
}
.chip-btn {
    padding: 7px 18px;
    border-radius: 18px;
    border: none;
    background: #232323;
    color: #fff;
    font-size: 1em;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    outline: none;
}
.chip-btn.selected, .chip-btn:active {
    background: #4caf50;
    color: #fff;
    font-weight: 600;
}

/* ===== Responsive cho iPhone màn dọc, tối ưu modal/nút cuối ===== */
@media (max-width: 600px) {
    /* GRID 1 cột cho mọi page */
    .exercises-grid,
    .templates-grid,
    .stats-grid {
        grid-template-columns: 1fr !important;
        gap: 12px !important;
    }
    .exercise-card,
    .template-card,
    .stat-card {
        padding-left: 7px !important;
        padding-right: 7px !important;
    }
    .modal-content {
        max-width: 99vw !important;
        width: 99vw !important;
        margin: 0 auto !important;
        min-width: unset !important;
        border-radius: 14px !important;
        box-shadow: 0 4px 32px #0004 !important;
        display: flex !important;
        flex-direction: column !important;
        /* sử dụng chiều cao an toàn cho iPhone */
        max-height: calc(100dvh - 8px) !important;
        height: auto !important;
    }
    .modal {
        padding-bottom: env(safe-area-inset-bottom, 12px) !important;
    }
    .modal-body, .modal-footer {
        padding-left: 8px !important;
        padding-right: 8px !important;
    }
    .selected-exercises {
        padding: 8px !important;
    }
    .form-input, .form-select {
        font-size: 1em !important;
        min-height: 38px !important;
    }
    .chip-group {
        gap: 6px !important;
    }
    .chip-btn {
        min-width: 76px !important;
        font-size: 1em !important;
        padding: 7px 10px !important;
        margin-bottom: 3px !important;
    }
    .exercise-icon, .stat-icon {
        width: 34px !important;
        height: 34px !important;
        font-size: 1.4rem !important;
        margin-bottom: 7px !important;
    }
    /* Modal footer luôn hiển thị trên cùng, KHÔNG bị che bởi thanh địa chỉ iOS */
    .modal-footer {
        position: sticky !important;
        bottom: 0;
        z-index: 2;
        background: var(--bg-primary, #191919);
        padding-bottom: calc(env(safe-area-inset-bottom, 12px) + 6px) !important;
        box-shadow: 0 -4px 12px rgba(0,0,0,0.08);
        border-bottom-left-radius: 14px;
        border-bottom-right-radius: 14px;
    }
}

/* Thêm cho Safari/iOS 15+ hỗ trợ full màn và safe-area */
html, body {
    min-height: 100dvh !important;
    height: 100dvh !important;
    box-sizing: border-box;
    overscroll-behavior-y: contain;
}

@supports(padding-bottom: env(safe-area-inset-bottom)) {
    body {
        padding-bottom: env(safe-area-inset-bottom);
    }
}
@media (max-width: 480px) {
    html {
        font-size: 15px !important;
    }
    .container {
        padding: 0 6px !important;
    }
    .exercise-icon, .stat-icon {
        width: 28px !important;
        height: 28px !important;
        font-size: 1rem !important;
        margin-bottom: 6px !important;
    }
    .btn, .btn-primary, .btn-secondary {
        font-size: 0.93rem !important;
        padding: 8px 12px !important;
    }
    .page-title, .section-title, .app-title {
        font-size: 1.08rem !important;
    }
    .exercises-grid {
        grid-template-columns: 1fr !important;
        gap: 13px !important;
    }
    .templates-grid {
        grid-template-columns: 1fr !important;
        gap: 13px !important;
    }
    .modal-content {
        max-width: 98vw !important;
        padding: 0 !important;
        margin: 3vw !important;
    }
    .modal-header, .modal-body, .modal-footer {
        padding-left: 10px !important;
        padding-right: 10px !important;
    }
    .chip-group {
        gap: 4px !important;
    }
    .chip-btn {
        padding: 6px 10px !important;
        font-size: 0.98em !important;
    }
    .stat-card, .template-card, .exercise-card {
        padding: 12px !important;
    }
}
@media (max-width: 600px) {
    input, select, textarea, button {
        font-size: 16px !important;
    }
}
/* === Fullscreen Workout Modal (incl. iOS Safari) === */
:root{ --vh: 1vh; --header-h:56px; --footer-h:64px; }
#workout-modal { position: fixed !important; inset: 0 !important; display: none; background: var(--bg-primary,#0f0f0f); z-index: 9999 !important; }
#workout-modal.active { display: flex !important; align-items: stretch !important; justify-content: stretch !important; }
#workout-modal .modal-overlay { display:none !important; }
#workout-modal .modal-content,
#workout-modal .modal-content.workout-modal {
  width: 100vw !important; max-width: 100vw !important;
  height: 100vh; height: 100svh; height: 100dvh; height: calc(var(--vh) * 100);
  max-height: calc(var(--vh) * 100);
  border-radius: 0 !important; box-shadow: none !important; margin: 0 !important;
  display: grid; grid-template-rows: auto 1fr auto;
}
#workout-modal .modal-header{ padding-top: calc(8px + env(safe-area-inset-top)); }
#workout-modal .modal-footer{ padding-bottom: calc(12px + env(safe-area-inset-bottom)); }
#workout-modal .modal-close { display:none !important; }
#workout-modal .modal-body{ height:auto !important; overflow:hidden; }

/* Exercises scroller fills leftover height */
#workout-exercises{
  height: calc(var(--vh) * 100 - var(--header-h) - var(--footer-h));
  max-height: calc(var(--vh) * 100 - var(--header-h) - var(--footer-h));
  overflow-y: auto; -webkit-overflow-scrolling: touch;
}

/* Actions column & delete button */
.set-actions { flex: 0 0 44px; display:flex; justify-content:center; align-items:center; }
.btn-icon { background: var(--bg-tertiary,#1a1a1a); border:1px solid var(--border-color,#333); border-radius:10px; padding:6px 8px; line-height:1; cursor:pointer; transition: transform .08s, background .18s; }
.btn-icon:hover { background: var(--bg-elevated,#222); transform: translateY(-1px); }
.btn-danger { color:#ff6b6b; border-color:#ff6b6b33; }
.btn-danger:hover { background:#ff6b6b22; }

@media (max-width: 420px){ .set-previous{ display:none; } }