:root {
    --primary-color: #10b981;
    --primary-dark: #059669;
    --primary-light: #34d399;
    --secondary-color: #f59e0b;
    --accent-color: #8b5cf6;
    --background-color: #ffffff;
    --background-secondary: #f8fafc;
    --surface-color: #f1f5f9;
    --text-color: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--secondary-color) 0%, #ea580c 100%);
}

/* Dark Mode Colors */
[data-theme="dark"] {
    --background-color: #0f172a;
    --background-secondary: #1e293b;
    --surface-color: #334155;
    --text-color: #f8fafc;
    --text-secondary: #cbd5e1;
    --border-color: #475569;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.3);
}

/* Enhanced Exercise Info Panel Styles */
.exercise-info-panel {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-top: 1rem;
    padding: 0;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    overflow: hidden;
}

.exercise-info-panel.hidden {
    display: none;
}

.exercise-info-header {
    background: var(--gradient-primary);
    color: white;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.exercise-info-header h4 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
}

.exercise-meta {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.exercise-category,
.exercise-subcategory {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.exercise-content {
    padding: 1rem;
}

/* Remove the old styles - they're replaced by the enhanced version above */

/* Old placeholder styles removed - using enhanced version below */

.exercise-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.exercise-description h5,
.exercise-tips h5 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
}

.exercise-description p {
    color: var(--text-color);
    line-height: 1.6;
    font-size: 0.95rem;
}

.exercise-tips ul {
    padding-left: 1.5rem;
    color: var(--text-secondary);
}

.exercise-tips li {
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
}

.exercise-info-footer {
    background: var(--background-secondary);
    border-top: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: center;
}

.info-toggle-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.toggle-icon {
    transition: transform 0.2s ease;
}

.info-toggle-btn.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

.toggle-text {
    /* Base text content will be set by JavaScript */
}

/* Responsive Design for Exercise Info Panel */
@media (max-width: 768px) {
    .exercise-content {
        grid-template-columns: 1fr;
    }
}

/* Enhanced Exercise Selection Group */
.exercise-select-group {
    position: relative;
}

.exercise-select-group select {
    margin-bottom: 0.5rem;
}

/* Animation for panel reveal */
.exercise-info-panel {
    animation: slideIn 0.3s ease-out;
}

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


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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(135deg, var(--background-color) 0%, var(--background-secondary) 100%);
    background-attachment: fixed;
    min-height: 100vh;
    transition: all 0.3s ease;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

header {
    margin-bottom: 2rem;
    text-align: center;
}

h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    text-align: center;
    position: relative;
}

h1::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

nav {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.nav-btn {
    padding: 0.75rem 1.25rem;
    border: none;
    background: var(--surface-color);
    color: var(--text-color);
    border-radius: 12px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.nav-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.nav-btn:hover::before {
    left: 100%;
}

.nav-btn.active {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
    0%, 100% {
        box-shadow: var(--shadow-md), 0 0 0 0 rgba(16, 185, 129, 0.4);
    }
    50% {
        box-shadow: var(--shadow-md), 0 0 0 8px rgba(16, 185, 129, 0);
    }
}

.view {
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.view.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
    animation: slideInUp 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h2 {
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

/* Circuit Workout Styles */
.workout-type-selector {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.workout-type-btn {
    flex: 1;
    padding: 0.75rem;
    background: var(--surface-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.workout-type-btn:hover {
    border-color: var(--primary-color);
}

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

.input-form.hidden {
    display: none;
}

#circuit-exercise-list {
    margin-bottom: 1rem;
}

.exercise-entry {
    background: var(--background-secondary);
    border-radius: 4px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.exercise-entry .form-row {
    align-items: flex-end;
}

.remove-exercise {
    background: var(--danger-color);
    padding: 0.5rem;
    height: 38px;
    width: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.remove-exercise:hover {
    background: #bd2130;
}

#add-circuit-exercise {
    width: 100%;
    margin: 1rem 0;
}

/* Chart Controls */
.chart-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--surface-color);
    border-radius: 8px;
}

.chart-controls label {
    margin: 0;
    white-space: nowrap;
}

.chart-controls select {
    width: auto;
    min-width: 150px;
}

.charts-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.chart-card {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    min-height: 300px;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.chart-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

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

.chart-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-align: center;
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding: 1rem;
}

.card {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card:hover::before {
    opacity: 1;
}

.card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.input-form {
    background: var(--surface-color);
    padding: 2rem;
    border-radius: 16px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.input-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-secondary);
}

.form-group {
    margin-bottom: 1rem;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

input, select, textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background: var(--background-color);
    color: var(--text-color);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1), var(--shadow-md);
    transform: translateY(-1px);
}

input:hover, select:hover, textarea:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

input[type="datetime-local"] {
    padding: 0.4rem 0.5rem;
}

button {
    background: var(--gradient-primary);
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

button:active::before {
    width: 300px;
    height: 300px;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    filter: brightness(1.1);
}

button:active {
    transform: translateY(0);
    transition: transform 0.1s;
}

.log-container {
    background: var(--surface-color);
    padding: 1rem;
    border-radius: 8px;
    margin-top: 1rem;
}

.log-entry {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
    margin-bottom: 0.75rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.log-entry::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.log-entry:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.log-entry:hover::before {
    opacity: 1;
}

.log-entry-notes {
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: var(--background-secondary);
    border-radius: 4px;
    font-style: italic;
    color: var(--text-secondary);
}

/* Training Type Styling */
.training-type {
    display: inline-block;
    background: var(--gradient-secondary);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-left: 0.5rem;
    box-shadow: var(--shadow-sm);
    animation: fadeInScale 0.3s ease-out;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.log-entry-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.log-entry-header h4 {
    margin: 0;
    color: var(--text-color);
    font-size: 1.1rem;
    font-weight: 600;
}

/* Filter Styling */
.log-filters {
    margin: 1.5rem 0;
    padding: 1rem;
    background: var(--surface-color);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.log-filters h3 {
    margin: 0 0 0.75rem 0;
    color: var(--text-color);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: var(--background-color);
    color: var(--text-secondary);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.filter-btn:hover {
    background: var(--primary-light);
    color: white;
    border-color: var(--primary-light);
    transform: translateY(-1px);
}

.filter-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

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

/* Filter Presets Styling */
.filter-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.preset-btn {
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    background: var(--background-color);
    color: var(--text-color);
    border-radius: 25px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.preset-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.preset-btn:hover::before {
    left: 100%;
}

.preset-btn:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.preset-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.preset-btn.active:hover {
    background: var(--gradient-primary);
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

/* Preset-specific colors */
.preset-btn[data-preset="beginner"]:not(.active):hover {
    border-color: #22c55e;
    background: rgba(34, 197, 94, 0.1);
}

.preset-btn[data-preset="intermediate"]:not(.active):hover {
    border-color: #eab308;
    background: rgba(234, 179, 8, 0.1);
}

.preset-btn[data-preset="advanced"]:not(.active):hover {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.preset-btn[data-preset="strength"]:not(.active):hover {
    border-color: #7c3aed;
    background: rgba(124, 58, 237, 0.1);
}

.preset-btn[data-preset="hypertrophy"]:not(.active):hover {
    border-color: #dc2626;
    background: rgba(220, 38, 38, 0.1);
}

.preset-btn[data-preset="endurance"]:not(.active):hover {
    border-color: #2563eb;
    background: rgba(37, 99, 235, 0.1);
}

.preset-btn[data-preset="power"]:not(.active):hover {
    border-color: #ea580c;
    background: rgba(234, 88, 12, 0.1);
}

.preset-btn[data-preset="intensity"]:not(.active):hover {
    border-color: #be185d;
    background: rgba(190, 24, 93, 0.1);
}

.preset-btn[data-preset="circuits"]:not(.active):hover {
    border-color: #059669;
    background: rgba(5, 150, 105, 0.1);
}


/* Timer Styling */
.timer-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    justify-content: center;
}

.timer-preset-btn {
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    background: var(--background-color);
    color: var(--text-color);
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 80px;
}

.timer-preset-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.custom-timer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.custom-timer input {
    width: 60px;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-align: center;
    font-size: 1rem;
}

.timer-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.timer-circle {
    width: 200px;
    height: 200px;
    border: 8px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--surface-color);
    transition: all 0.3s ease;
}

.timer-circle.active {
    border-color: var(--primary-color);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
    70% { box-shadow: 0 0 0 20px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.timer-text {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-color);
    text-align: center;
}

.timer-controls {
    display: flex;
    gap: 1rem;
}

.timer-btn {
    padding: 0.75rem 1rem;
    border: none;
    background: var(--primary-color);
    color: white;
    border-radius: 25px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 60px;
}

.timer-btn:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.timer-btn:disabled {
    background: var(--text-secondary);
    cursor: not-allowed;
    opacity: 0.5;
}

.timer-recommendations {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.timer-recommendations span {
    padding: 0.5rem;
    background: var(--surface-color);
    border-radius: 8px;
    font-size: 0.9rem;
    text-align: center;
}

/* Progress Tracking Styling */
.progress-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.progress-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

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

.progress-card h4 {
    margin: 0 0 1rem 0;
    color: var(--text-color);
    font-size: 1rem;
}

.progression-display {
    text-align: center;
}

.level-indicator {
    position: relative;
}

.level-text {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.level-bar {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.level-progress {
    height: 100%;
    background: var(--gradient-primary);
    transition: width 1s ease;
}

.load-display {
    text-align: center;
}

.load-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    line-height: 1;
}

.load-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.recommendations-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.recommendation-item {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    transition: all 0.3s ease;
}

.recommendation-item:hover {
    border-color: var(--primary-color);
    transform: translateX(4px);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.achievement-item {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.achievement-item.unlocked {
    border-color: var(--success-color);
    background: rgba(16, 185, 129, 0.1);
}

.achievement-item.unlocked::before {
    content: '✓';
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    color: var(--success-color);
    font-weight: bold;
}

.achievement-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    display: block;
}

.achievement-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.25rem;
}

.achievement-description {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Enhanced Settings Styling */
.settings-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
    padding: 0.5rem;
    background: var(--surface-color);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.settings-tab-btn {
    padding: 0.75rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    flex: 1;
    text-align: center;
    min-width: 120px;
}

.settings-tab-btn:hover {
    background: var(--background-color);
    color: var(--text-color);
    transform: translateY(-1px);
}

.settings-tab-btn.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-sm);
}

.settings-container {
    background: var(--background-color);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    padding: 0;
    overflow: hidden;
}

.settings-tab {
    display: none;
    padding: 2rem;
}

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

.settings-section {
    margin-bottom: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.settings-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.settings-section h3 {
    margin: 0 0 1.5rem 0;
    color: var(--text-color);
    font-size: 1.2rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.setting-group {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--surface-color);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.setting-group:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.setting-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-color);
}

.setting-label span:first-child {
    flex: 1;
    margin-right: 1rem;
}

.setting-label select,
.setting-label input[type="number"] {
    min-width: 120px;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--background-color);
    color: var(--text-color);
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.setting-label select:focus,
.setting-label input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

/* Toggle Switch Styling */
.toggle-label {
    position: relative;
    padding-right: 60px;
}

.toggle-label input[type="checkbox"] {
    opacity: 0;
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
}

.toggle-slider {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 26px;
    background: var(--border-color);
    border-radius: 13px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 22px;
    height: 22px;
    background: white;
    border-radius: 50%;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.toggle-label input[type="checkbox"]:checked + .toggle-slider {
    background: var(--primary-color);
}

.toggle-label input[type="checkbox"]:checked + .toggle-slider::before {
    transform: translateX(24px);
}

.setting-description {
    margin: 0.5rem 0 0 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-style: italic;
}

.input-group {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.input-group input {
    flex: 1;
}

.input-group select {
    min-width: 80px;
}

/* Data Stats Styling */
.data-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    background: var(--background-color);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Export/Import Options */
.export-options,
.import-options,
.reset-options {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.export-options button,
.import-options button,
.reset-options button {
    flex: 1;
    min-width: 150px;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.primary-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.secondary-btn {
    background: var(--surface-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.secondary-btn:hover {
    background: var(--background-color);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

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

.warning-btn:hover {
    background: #d97706;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.danger-btn:hover {
    background: #dc2626;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* About Info Styling */
.about-info {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--background-color);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.info-label {
    font-weight: 500;
    color: var(--text-secondary);
}

.info-value {
    font-weight: 600;
    color: var(--text-color);
}

/* Color Theme Variables */
:root[data-accent="blue"] {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
}

:root[data-accent="purple"] {
    --primary-color: #8b5cf6;
    --primary-dark: #7c3aed;
    --primary-light: #a78bfa;
}

:root[data-accent="orange"] {
    --primary-color: #f59e0b;
    --primary-dark: #d97706;
    --primary-light: #fbbf24;
}

:root[data-accent="red"] {
    --primary-color: #ef4444;
    --primary-dark: #dc2626;
    --primary-light: #f87171;
}

/* Animation Speed Controls */
:root[data-animation="fast"] * {
    transition-duration: 0.15s !important;
    animation-duration: 0.15s !important;
}

:root[data-animation="slow"] * {
    transition-duration: 0.6s !important;
    animation-duration: 0.6s !important;
}

:root[data-animation="none"] * {
    transition: none !important;
    animation: none !important;
}

/* Responsive Settings */
@media (max-width: 768px) {
    .settings-nav {
        flex-direction: column;
    }
    
    .settings-tab-btn {
        min-width: auto;
    }
    
    .settings-tab {
        padding: 1rem;
    }
    
    .data-stats {
        grid-template-columns: 1fr;
    }
    
    .export-options,
    .import-options,
    .reset-options {
        flex-direction: column;
    }
    
    .export-options button,
    .import-options button,
    .reset-options button {
        min-width: auto;
    }
    
    .setting-label {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .setting-label span:first-child {
        margin-right: 0;
    }
    
    .toggle-label {
        flex-direction: row;
        align-items: center;
        padding-right: 60px;
    }
}

.settings-container {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: 8px;
}

.setting-group {
    margin-bottom: 2rem;
}

.setting-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
}

.secondary-btn {
    background: var(--surface-color);
    color: var(--text-color);
    border: 2px solid var(--border-color);
    margin-right: 0.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.secondary-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 0;
}

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

.secondary-btn:hover::before {
    left: 0;
}

.secondary-btn span {
    position: relative;
    z-index: 1;
}

.danger-btn {
    background: linear-gradient(135deg, var(--danger-color) 0%, #dc2626 100%);
    color: white;
    margin-top: 1rem;
    position: relative;
    overflow: hidden;
}

.danger-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.danger-btn:hover::after {
    width: 300px;
    height: 300px;
}

.danger-btn:hover {
    background: #bd2130;
}

/* Calendar Styles */
.calendar-container {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: 8px;
    margin: 2rem 0;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.calendar-nav {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    width: 30px;
    height: 30px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.calendar-nav:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    margin-bottom: 1.5rem;
}

.calendar-day-header {
    text-align: center;
    font-weight: bold;
    padding: 0.5rem;
    color: var(--text-secondary);
}

.calendar-day {
    aspect-ratio: 1;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    position: relative;
    background: var(--background-color);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.calendar-day:hover {
    border-color: var(--primary-color);
    background: var(--background-secondary);
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
    z-index: 10;
}

.calendar-day.empty {
    background: none;
    border: none;
    cursor: default;
}

.calendar-day.today {
    border-color: var(--primary-color);
}

.calendar-day.selected {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary-color);
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
    z-index: 5;
}

.day-number {
    font-size: 0.9rem;
}

.workout-indicators {
    position: absolute;
    bottom: 4px;
    right: 4px;
    display: flex;
    gap: 2px;
}

.indicator {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.indicator.weightlifting {
    background: var(--primary-color);
}

.indicator.cardio {
    background: var(--secondary-color);
}

.indicator.meals {
    background: var(--success-color);
}

.indicator.water {
    background: #007bff;
}

.workout-details {
    background: var(--background-color);
    padding: 1rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.workout-details h4 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.workout-section {
    margin-bottom: 1.5rem;
}

.workout-section h5 {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.workout-entry {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 0.5rem;
}

.workout-entry-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.25rem;
}

.exercise-name {
    font-weight: bold;
}

.workout-entry-details {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Set Groups Styles */
.set-group {
    background: var(--background-secondary);
    border-radius: 4px;
    padding: 0.3rem;
    margin: 0.3rem 0;
}

.set-group h4 {
    margin: 0 0 0.5rem 0;
    color: var(--primary-color);
}

/* Performance Comparison Styles */
.set-summary {
    background: var(--background-color);
    padding: 0.25rem;
    border-radius: 4px;
    margin-bottom: 0.5rem;
    display: grid;
    grid-template-columns: auto 1fr 1fr;
    gap: 1rem;
    align-items: center;
}

.set-number {
    font-weight: bold;
    color: var(--primary-color);
}

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

.actual {
    color: var(--primary-color);
}

.log-entry-sets {
    margin: 0.5rem 0;
}

.log-entry-summary {
    border-top: 1px solid var(--border-color);
    margin-top: 0.5rem;
    padding-top: 0.5rem;
}

.log-entry-summary span {
    display: inline-block;
    margin-right: 0.5rem;
}

.log-entry-summary span:last-child {
    margin-right: 0;
}

.total-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    color: var(--text-secondary);
}

.total-stats span {
    white-space: nowrap;
}

.workout-entry-notes {
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: var(--background-secondary);
    border-radius: 4px;
    font-style: italic;
    color: var(--text-secondary);
}

.no-workouts {
    text-align: center;
    color: var(--text-secondary);
    padding: 1rem;
}

/* Goals View Styles */
.goals-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.goal-card {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.goal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.goal-header h3 {
    margin: 0;
    font-size: 1.1rem;
}

.delete-goal {
    background: none;
    border: none;
    color: var(--danger-color);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0 0.5rem;
}

.delete-goal:hover {
    background: none;
    color: #bd2130;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--background-secondary);
    border-radius: 4px;
    overflow: hidden;
    margin: 0.5rem 0;
}

.progress {
    height: 100%;
    background: var(--gradient-primary);
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 4px;
    position: relative;
    overflow: hidden;
}

.progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background-image: linear-gradient(
        -45deg,
        rgba(255, 255, 255, 0.2) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 255, 255, 0.2) 50%,
        rgba(255, 255, 255, 0.2) 75%,
        transparent 75%,
        transparent
    );
    background-size: 50px 50px;
    animation: move 2s linear infinite;
}

@keyframes move {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 50px 50px;
    }
}

.progress-text {
    text-align: right;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Trophy Styles */
.trophy-case {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.trophy {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.trophy::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, transparent 0%, rgba(255, 215, 0, 0.1) 50%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.trophy:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: var(--warning-color);
}

.trophy:hover::before {
    opacity: 1;
}

.trophy:hover .trophy-icon {
    transform: scale(1.1) rotate(5deg);
    filter: drop-shadow(0 4px 8px rgba(255, 215, 0, 0.3));
}

.trophy-icon {
    font-size: 2rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.trophy-icon.gold {
    color: #FFD700;
}

.trophy-icon.silver {
    color: #C0C0C0;
}

.trophy-icon.bronze {
    color: #CD7F32;
}

.trophy-details {
    flex: 1;
}

.trophy-details h4 {
    margin: 0;
    color: var(--text-color);
}

.trophy-details p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0.25rem 0 0 0;
}

.no-trophies {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem;
    font-style: italic;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

/* Goal Form Styles */
#new-goal-form {
    margin-bottom: 0;
}

#new-goal-form .form-row {
    margin-bottom: 1rem;
}

#new-goal-form button[type="submit"] {
    width: 100%;
    margin-top: 1rem;
}

.input-with-unit {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding-right: 0.75rem;
}

.input-with-unit input {
    border: none;
    border-radius: 4px 0 0 4px;
    flex: 1;
}

.input-with-unit span {
    color: var(--text-secondary);
    font-size: 0.9rem;
    white-space: nowrap;
}

/* Meal Tracker Styles */
#meal-tracker {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.meal-summary {
    background: var(--background-color);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    text-align: center;
}

.meal-summary h3 {
    color: var(--primary-color);
    margin: 0;
}

.meal-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.meal-item {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.meal-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-secondary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.meal-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--secondary-color);
}

.meal-item:hover::before {
    opacity: 1;
}

.meal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.meal-header h4 {
    margin: 0;
    color: var(--text-color);
}

.meal-actions {
    display: flex;
    gap: 0.5rem;
}

.meal-details {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.meal-details p {
    margin: 0.25rem 0;
}

.meal-notes {
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: var(--background-secondary);
    border-radius: 4px;
    font-style: italic;
    color: var(--text-secondary);
}

.meal-recipe {
    margin: 0.5rem 0;
}

.recipe-link {
    color: var(--primary-color);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

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

.recipe-link::before {
    content: "📖";
    font-size: 1.1em;
}

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

.btn-danger:hover {
    background: #bd2130;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.btn-secondary {
    background: var(--surface-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

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

/* Exercise Selection and Tooltip Styles */
.exercise-select-group {
    position: relative;
}


#exercise-category,
#exercise-subcategory,
#exercise {
    margin-bottom: 0.5rem;
}

#exercise-category:focus,
#exercise-subcategory:focus,
#exercise:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.2);
}

/* Weightlifting Summary Styles */
#weightlifting-summary p {
    margin-bottom: 1rem;
}

#weightlifting-summary p:last-child {
    margin-bottom: 0;
}

/* Water Tracking Styles */
.water-input {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

/* Weight Tracking Styles */
.weight-input {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.weight-input input {
    flex: 2;
}

.weight-input select {
    flex: 1;
}

.weight-input button {
    flex: 1;
}

#weight-summary {
    text-align: center;
}

#weight-summary p {
    margin-bottom: 0.5rem;
}

#latest-weight {
    font-size: 1.2em;
    font-weight: bold;
    color: var(--primary-color);
}

.water-input input {
    flex: 2;
}

.water-input select {
    flex: 1;
}

.water-input button {
    flex: 1;
}

#water-summary {
    text-align: center;
}

#water-summary p {
    margin-bottom: 0.5rem;
}

.water-history {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.water-history h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

#water-date {
    width: 100%;
    margin-bottom: 1rem;
}

#water-history-display {
    background: var(--background-secondary);
    padding: 1rem;
    border-radius: 4px;
}

#water-history-display p {
    margin-bottom: 0.5rem;
}

#water-history-display .progress-bar {
    margin: 1rem 0;
}

.input-group {
    display: flex;
    gap: 0.5rem;
}

.input-group input {
    flex: 2;
}

.input-group select {
    flex: 1;
}

/* Mobile First Responsive Design */
/* Base styles for mobile (<=480px) */
.app-container {
    padding: 1rem;
    width: 100%;
    max-width: 100%;
    min-height: 100vh;
}

header {
    margin-bottom: 1rem;
}

h1 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.nav-btn {
    flex: 1 1 calc(50% - 0.25rem);
    min-width: auto;
    padding: 0.75rem 0.5rem;
    font-size: 0.85rem;
    border-radius: 8px;
}

.summary-cards,
.goals-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 0;
}

.card {
    padding: 1.25rem;
    margin: 0;
}

.form-row {
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.input-form {
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.chart-controls {
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem;
    gap: 0.5rem;
}

.charts-container {
    grid-template-columns: 1fr;
    gap: 1rem;
}

.chart-card {
    min-height: 250px;
    padding: 1rem;
}

.calendar-grid {
    gap: 2px;
}

.calendar-day {
    padding: 0.25rem;
}

.day-number {
    font-size: 0.8rem;
}

.workout-indicators {
    bottom: 2px;
    right: 2px;
}

.trophy {
    flex-direction: column;
    text-align: center;
    padding: 0.75rem;
}

.trophy-details {
    text-align: center;
}

.water-input,
.weight-input {
    flex-direction: column;
    gap: 0.5rem;
}

.input-with-unit {
    flex-direction: column;
}

/* Tablet (481px - 1024px) */
@media (min-width: 481px) {
    .app-container {
        padding: 1.5rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    .nav-btn {
        flex: 1 1 auto;
        min-width: 120px;
        font-size: 0.95rem;
        padding: 0.75rem 1.25rem;
    }

    .summary-cards {
        padding: 0.5rem;
    }

    .summary-cards,
    .goals-container {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 1rem;
    }

    .form-row {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .water-input,
    .weight-input {
        flex-direction: row;
    }

    .input-with-unit {
        flex-direction: row;
    }

    .trophy {
        flex-direction: row;
        text-align: left;
    }

    .trophy-details {
        text-align: left;
    }
}

/* Desktop (1025px - 1440px) */
@media (min-width: 1025px) {
    .app-container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 2rem;
    }

    h1 {
        font-size: 2.25rem;
    }

    .summary-cards {
        padding: 1rem;
        gap: 2rem;
    }

    .nav-btn {
        font-size: 1rem;
        padding: 0.75rem 1.5rem;
    }

    .charts-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    .chart-controls {
        flex-direction: row;
        align-items: center;
        padding: 1rem;
    }

    .calendar-grid {
        gap: 4px;
    }

    .calendar-day {
        padding: 0.5rem;
    }

    .day-number {
        font-size: 1rem;
    }
}

/* Large Screens (>1440px) */
@media (min-width: 1441px) {
    body {
        font-size: 18px;
    }

    .app-container {
        max-width: 1600px;
        padding: 3rem;
    }

    h1 {
        font-size: 2.5rem;
    }

    .charts-container {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
    }

    .summary-cards {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
        gap: 2.5rem;
        padding: 1.5rem;
    }

    .card {
        padding: 2rem;
    }

    .input-form {
        padding: 2.5rem;
    }
}

/* Additional Modern Effects */
@keyframes floatIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.shimmer {
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

/* Loading states */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    animation: shimmer 1.5s infinite;
}

/* Scroll enhancements */
html {
    scroll-behavior: smooth;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* Focus indicators */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

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

/* Print Media Query */
@media print {
    .app-container {
        max-width: none;
        padding: 0;
    }

    nav,
    button,
    .input-form {
        display: none;
    }

    .card {
        break-inside: avoid;
    }
}