:root {
    /* Typography - Fluid Scaling */
    --fs-26-60: clamp(26px, 2.5297vw + 11.43px, 60px) !important;
    --fs-20-42: clamp(20px, 1.636vw + 10.5766px, 42px) !important;
    --fs-16-32: clamp(16px, 9.15px + 1.19vw, 32px) !important;
    --fs-12-24: clamp(12px, 6.8576px + 0.8928vw, 24px) !important;
    --fs-12-20: clamp(12px, 0.595vw + 8.57px, 20px) !important;
    --fs-12-18: clamp(12px, 0.44vw + 9.43px, 18px) !important;
    --fs-12-16: clamp(12px, 10.29px + 0.297vw, 16px) !important;
    --fs-10-16: clamp(10px, 8.525px + 0.3703vw, 16px) !important;
    
    /* Colors */
    --primary-bg: #f5f4ed;
    --secondary-bg: #ffc62f;
    --accent: #ff6b35;
    --success: #4ade80;
    --warning: #fbbf24;
    --error: #ef4444;
    --info: #3b82f6;
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --border: #e0dfd5;
    --card-bg: #ffffff;
    --overlay: rgba(0, 0, 0, 0.5);
    
    /* Water-themed gradients */
    --gradient-water: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #4ade80 0%, #22c55e 100%);
    --gradient-warning: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 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, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

.tools-parent-container{
   font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.tools-parent-container{


.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.main-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.header {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    position: relative;
}

.header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: var(--gradient-water);
    border-radius: var(--radius-full);
}

.title {
    font-size: var(--fs-26-60);
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
}

.title .accent {
    color: var(--secondary-bg);
    display: inline-block;
    transform: scale(1.2);
}

.subtitle {
    font-size: var(--fs-12-20);
    color: var(--text-secondary);
    font-weight: 400;
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: box-shadow var(--transition-base);
}

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

.section-title {
    font-size: var(--fs-16-32);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--secondary-bg);
    border-radius: var(--radius-full);
}

.subsection-title {
    font-size: var(--fs-12-20);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}


.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-label {
    font-size: var(--fs-12-16);
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.form-input,
.form-select {
    width: 100%;
    padding: 12px 16px;
    font-size: var(--fs-12-16);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--card-bg);
    color: var(--text-primary);
    transition: all var(--transition-fast);
    outline: none;
}

.form-input:focus,
.form-select:focus {
    border-color: var(--secondary-bg);
    box-shadow: 0 0 0 3px rgba(255, 198, 47, 0.1);
}

.form-input:invalid,
.form-select:invalid {
    border-color: var(--error);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M10.293 3.293L6 7.586 1.707 3.293A1 1 0 00.293 4.707l5 5a1 1 0 001.414 0l5-5a1 1 0 10-1.414-1.414z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.input-with-toggle {
    display: flex;
    gap: var(--spacing-sm);
}

.input-with-toggle .form-input {
    flex: 1;
}

.unit-toggle {
    display: flex;
    background: var(--border);
    border-radius: var(--radius-sm);
    padding: 2px;
}

.unit-btn {
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: var(--fs-10-16);
    font-weight: 600;
    cursor: pointer;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.unit-btn.active {
    background: var(--card-bg);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.error-message {
    font-size: var(--fs-10-16);
    color: var(--error);
    min-height: 20px;
    display: block;
}


.health-conditions {
    margin-bottom: var(--spacing-xl);
}

.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: var(--fs-12-16);
    color: var(--text-primary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.checkbox-label:hover {
    background: rgba(255, 198, 47, 0.05);
}

.checkbox {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--secondary-bg);
}

.btn {
    padding: 14px 28px;
    font-size: var(--fs-12-18);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    outline: none;
}

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

.btn-primary {
    background: var(--secondary-bg);
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
    background: #ffb81f;
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--gradient-water);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover:not(:disabled) {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-secondary-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border);
    padding: 12px 24px;
}

.btn-secondary-outline:hover:not(:disabled) {
    border-color: var(--secondary-bg);
    background: rgba(255, 198, 47, 0.1);
}

.btn-danger-outline {
    background: transparent;
    color: var(--error);
    border: 2px solid var(--error);
    padding: 12px 24px;
}

.btn-danger-outline:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.1);
    border-color: #dc2626;
}

.btn-download {
    background: var(--gradient-water);
    color: white;
    box-shadow: var(--shadow-md);
    width: 100%;
}

.btn-download:hover:not(:disabled) {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-download .download-icon {
    width: 20px;
    height: 20px;
    filter: brightness(0) invert(1);
    transition: transform var(--transition-base);
}

.btn-download:hover .download-icon {
    transform: translateY(2px);
}

.btn-text {
    background: transparent;
    color: var(--text-secondary);
    padding: 8px 16px;
    font-size: var(--fs-10-16);
}

.btn-text:hover:not(:disabled) {
    color: var(--text-primary);
    background: rgba(0, 0, 0, 0.05);
}

/* Action Buttons Container */
.action-buttons {
    margin-top: var(--spacing-md);
}

#calculate-btn {
    width: 100%;
    margin-bottom: var(--spacing-md);
}

.secondary-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.secondary-actions .btn {
    flex: 1;
    min-width: 140px;
}

.quick-btn {
    padding: 10px 16px;
    background: var(--card-bg);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: var(--fs-10-16);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.quick-btn:hover {
    border-color: var(--secondary-bg);
    background: rgba(255, 198, 47, 0.1);
}

.results-section {
    animation: slideIn var(--transition-slow);
}

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

.result-card {
    background: var(--gradient-water);
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

.result-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.result-icon {
    width: 40px;
    height: 40px;
    filter: brightness(0) invert(1);
}

.result-title {
    font-size: var(--fs-12-24);
    font-weight: 700;
}

.result-value {
    font-size: var(--fs-26-60);
    font-weight: 800;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.result-value .amount {
    letter-spacing: -0.02em;
}

.result-value .unit {
    font-size: var(--fs-12-24);
    font-weight: 400;
    opacity: 0.9;
}

.result-subtitle {
    font-size: var(--fs-12-18);
    opacity: 0.9;
}

/* Electrolytes Grid */
.electrolytes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.electrolyte-card {
    background: linear-gradient(135deg, rgba(255, 198, 47, 0.1) 0%, rgba(255, 198, 47, 0.05) 100%);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 2px solid var(--border);
    transition: all var(--transition-base);
}

.electrolyte-card:hover {
    border-color: var(--secondary-bg);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.electrolyte-name {
    font-size: var(--fs-12-16);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.electrolyte-value {
    font-size: var(--fs-16-32);
    font-weight: 700;
    color: var(--text-primary);
}

.electrolyte-unit {
    font-size: var(--fs-12-18);
    font-weight: 400;
    color: var(--text-secondary);
    margin-left: 4px;
}

/* Recommendations */
.recommendations {
    background: rgba(255, 198, 47, 0.1);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--secondary-bg);
}

.recommendation-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.recommendation-item:last-child {
    margin-bottom: 0;
}

.recommendation-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    margin-top: 2px;
}

.recommendation-icon.info {
    filter: invert(48%) sepia(79%) saturate(2476%) hue-rotate(86deg) brightness(118%) contrast(119%);
}

.recommendation-icon.warning {
    filter: invert(84%) sepia(55%) saturate(2449%) hue-rotate(357deg) brightness(102%) contrast(98%);
}

.recommendation-text {
    font-size: var(--fs-12-16);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Download Section */
.download-section {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--border);
}

.tracker-section {
    animation: slideIn var(--transition-slow);
}

.progress-container {
    margin-bottom: var(--spacing-xl);
}

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

.progress-label {
    font-size: var(--fs-12-18);
    font-weight: 600;
    color: var(--text-primary);
}

.progress-percentage {
    font-size: var(--fs-12-20);
    font-weight: 700;
    color: var(--secondary-bg);
}

.progress-bar {
    width: 100%;
    height: 24px;
    background: var(--border);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-success);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

.progress-footer {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-sm);
    font-size: var(--fs-12-16);
    color: var(--text-secondary);
}

#current-intake {
    font-weight: 600;
    color: var(--text-primary);
}

/* Intake Form */
.intake-form {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: rgba(255, 198, 47, 0.05);
    border-radius: var(--radius-md);
}

.intake-input-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.intake-input-group .form-input {
    flex: 1;
}

.input-unit {
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-md);
    background: var(--border);
    border-radius: var(--radius-sm);
    font-size: var(--fs-12-16);
    font-weight: 600;
    color: var(--text-secondary);
}

.quick-add-btns {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* Intake History */
.intake-history {
    margin-top: var(--spacing-xl);
}

.intake-list {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: var(--spacing-md);
}

.intake-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    animation: fadeIn var(--transition-base);
}

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

.intake-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.intake-amount {
    font-size: var(--fs-12-18);
    font-weight: 600;
    color: var(--text-primary);
}

.intake-time {
    font-size: var(--fs-10-16);
    color: var(--text-secondary);
}

.delete-btn {
    background: transparent;
    border: none;
    padding: var(--spacing-sm);
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.delete-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
    font-size: var(--fs-12-16);
}

#toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    pointer-events: none;
    max-width: 400px;
}

.toast {
    background: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    border-left: 4px solid;
    min-width: 300px;
    pointer-events: auto;
    
    /* CRITICAL: Overlapping positioning */
    position: absolute;
    top: 0;
    right: 0;
    
    /* Start invisible */
    opacity: 0;
    transform: translateX(400px) scale(0.9);
    transition: all 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Show animation */
.toast.show {
    opacity: 1;
    transform: translateX(0) scale(1);
}

/* Remove animation */
.toast.removing {
    opacity: 0;
    transform: translateX(400px) scale(0.9);
}

/* Toast type colors */
.toast.success {
    border-color: var(--success);
}

.toast.error {
    border-color: var(--error);
}

.toast.warning {
    border-color: var(--warning);
}

.toast.info {
    border-color: var(--info);
}

.toast-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
    min-width: 0;
}

.toast-message {
    font-size: var(--fs-12-16);
    color: var(--text-primary);
    font-weight: 500;
    margin: 0;
    word-wrap: break-word;
}

.toast-close {
    background: transparent;
    border: none;
    padding: 4px;
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.toast-close:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-primary);
}

.toast-close:active {
    transform: scale(0.95);
}

.disclaimer {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--info);
    margin-top: var(--spacing-xl);
}

.disclaimer .icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    filter: invert(48%) sepia(79%) saturate(2476%) hue-rotate(86deg) brightness(118%) contrast(119%);
}

.disclaimer p {
    font-size: var(--fs-12-16);
    color: var(--text-primary);
    line-height: 1.6;
}

.icon {
    width: 20px;
    height: 20px;
    display: inline-block;
}

/* Form Label Icons - Warm accent color matching secondary-bg */
.form-label .icon {
    filter: invert(71%) sepia(66%) saturate(478%) hue-rotate(358deg) brightness(101%) contrast(101%);
    /* This creates a warm orange/yellow tone matching #ffc62f */
    opacity: 0.9;
    transition: all var(--transition-fast);
}

.form-label:hover .icon {
    opacity: 1;
    filter: invert(66%) sepia(95%) saturate(478%) hue-rotate(358deg) brightness(105%) contrast(101%);
    transform: scale(1.1);
}

/* Result Icon - White color for gradient backgrounds */
.result-icon {
    width: 40px;
    height: 40px;
    filter: brightness(0) invert(1);
    /* Pure white for gradient backgrounds */
}

/* Toast Icons - Colored based on toast type */
.toast-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.toast.success .toast-icon {
    filter: invert(70%) sepia(50%) saturate(500%) hue-rotate(80deg) brightness(100%) contrast(90%);
    /* Green tone matching --success: #4ade80 */
}

.toast.error .toast-icon,
.toast.warning .toast-icon {
    filter: invert(56%) sepia(98%) saturate(1975%) hue-rotate(336deg) brightness(101%) contrast(95%);
    /* Red/Orange tone matching --error: #ef4444 */
}

.toast.info .toast-icon {
    filter: invert(48%) sepia(79%) saturate(2476%) hue-rotate(200deg) brightness(100%) contrast(95%);
    /* Blue tone matching --info: #3b82f6 */
}

/* Recommendation Icons */
.recommendation-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    margin-top: 2px;
}

.recommendation-icon.info {
    filter: invert(71%) sepia(66%) saturate(478%) hue-rotate(358deg) brightness(101%) contrast(101%);
    /* Warm yellow matching secondary-bg */
}

.recommendation-icon.warning {
    filter: invert(56%) sepia(98%) saturate(1975%) hue-rotate(336deg) brightness(101%) contrast(95%);
    /* Orange/red for warnings */
}

/* Disclaimer Icon - Info blue */
.disclaimer .icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    filter: invert(48%) sepia(79%) saturate(2476%) hue-rotate(200deg) brightness(100%) contrast(95%);
    /* Blue tone for informational content */
}

/* Delete Button Icons - Subtle gray, red on hover */
.delete-btn svg {
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.delete-btn:hover svg {
    color: var(--error);
    transform: scale(1.1);
}

/* Close Button Icons - Subtle gray, darker on hover */
.toast-close svg {
    transition: all var(--transition-fast);
}

.toast-close:hover svg {
    transform: rotate(90deg) scale(1.1);
}

/* Specific Icon Colors for Different Contexts */

/* User/Profile Icon - Purple accent */
img[src*="user.svg"] {
    filter: invert(42%) sepia(93%) saturate(500%) hue-rotate(230deg) brightness(100%) contrast(90%);
}

/* Age Icon - Coral/pink accent */
img[src*="age.svg"] {
    filter: invert(60%) sepia(35%) saturate(1500%) hue-rotate(320deg) brightness(100%) contrast(90%);
}

/* Gender Icon - Purple accent */
img[src*="gender.svg"] {
    filter: invert(42%) sepia(93%) saturate(500%) hue-rotate(230deg) brightness(100%) contrast(90%);
}

/* Activity Icon - Energetic orange */
img[src*="activity.svg"] {
    filter: invert(56%) sepia(98%) saturate(1975%) hue-rotate(10deg) brightness(101%) contrast(95%);
}

/* Exercise Duration Icon - Blue accent */
img[src*="exercise-duration.svg"] {
    filter: invert(48%) sepia(79%) saturate(2476%) hue-rotate(200deg) brightness(100%) contrast(95%);
}

/* Exercise Intensity Icon - Red/orange for intensity */
img[src*="exercise-intensity.svg"] {
    filter: invert(56%) sepia(98%) saturate(1975%) hue-rotate(336deg) brightness(101%) contrast(95%);
}

/* Temperature Icon - Warm red tone */
img[src*="temperature.svg"] {
    filter: invert(56%) sepia(98%) saturate(1975%) hue-rotate(336deg) brightness(101%) contrast(95%);
}

/* Altitude Icon - Mountain blue */
img[src*="altitude.svg"] {
    filter: invert(48%) sepia(79%) saturate(2476%) hue-rotate(200deg) brightness(100%) contrast(95%);
}

/* Water Drop Icon - Cyan/blue water color */
img[src*="water-drop.svg"] {
    filter: invert(48%) sepia(79%) saturate(2476%) hue-rotate(180deg) brightness(100%) contrast(95%);
}

/* Check/Success Icon - Green */
img[src*="check.svg"] {
    filter: invert(70%) sepia(50%) saturate(500%) hue-rotate(80deg) brightness(100%) contrast(90%);
}

/* Warning Icon - Orange/yellow */
img[src*="warning.svg"] {
    filter: invert(71%) sepia(66%) saturate(478%) hue-rotate(358deg) brightness(101%) contrast(101%);
}

/* Info Icon - Blue */
img[src*="info.svg"] {
    filter: invert(48%) sepia(79%) saturate(2476%) hue-rotate(200deg) brightness(100%) contrast(95%);
}

/* Download Icon - White for button use */
img[src*="download.svg"] {
    filter: brightness(0) invert(1);
}

.download-icon {
    width: 20px;
    height: 20px;
    filter: brightness(0) invert(1);
    transition: transform var(--transition-base);
}

/* Icon Hover Effects - Brighten on hover */
.form-label:hover img[src*=".svg"],
.checkbox-label:hover .icon {
    filter: brightness(1.2);
    transform: scale(1.05);
}

/* Icon Animation on Active State */
.form-label:active .icon,
.btn:active .icon {
    transform: scale(0.95);
}

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }

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

    .electrolytes-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .quick-add-btns {
        flex-direction: column;
    }

    .quick-btn {
        width: 100%;
    }

    .secondary-actions {
        flex-direction: column;
    }

    .secondary-actions .btn {
        width: 100%;
    }

    #toast-container {
        left: 20px;
        right: 20px;
        max-width: none;
    }

    .toast {
        min-width: auto;
        right: auto;
        left: 0;
    }
}

@media (max-width: 480px) {
    .card {
        padding: var(--spacing-lg);
    }

    .header {
        padding: var(--spacing-lg) 0;
    }

    .result-card {
        padding: var(--spacing-lg);
    }

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

    .intake-input-group {
        flex-direction: column;
    }
}

@media print {
    body {
        background: white;
    }

    .input-section,
    .tracker-section,
    .disclaimer {
        display: none;
    }

    .card {
        box-shadow: none;
        border: 1px solid var(--border);
    }

    .btn {
        display: none;
    }
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

*:focus-visible {
    outline: 2px solid var(--secondary-bg);
    outline-offset: 2px;
}

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

.toast-confirm {
    min-width: 350px;
}

.toast-confirm .toast-content {
    width: 100%;
}

.toast-confirm .toast-close {
    align-self: flex-start;
    margin-top: -4px;
}

.toast-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    justify-content: flex-end;
}

.toast-btn {
    padding: 8px 20px;
    border: none;
    border-radius: 6px;
    font-size: clamp(10px, 8.525px + 0.3703vw, 16px);
    font-weight: 600;
    cursor: pointer;
    transition: all 150ms ease-in-out;
    outline: none;
}

.toast-btn:focus-visible {
    outline: 2px solid #ffc62f;
    outline-offset: 2px;
}

.toast-btn-confirm {
    background: #ffc62f;
    color: #1a1a1a;
}

.toast-btn-confirm:hover {
    background: #ffb81f;
    transform: translateY(-1px);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.toast-btn-confirm:active {
    transform: translateY(0);
}

.toast-btn-cancel {
    background: transparent;
    color: #6b7280;
    border: 1px solid #e0dfd5;
}

.toast-btn-cancel:hover {
    background: rgba(0, 0, 0, 0.05);
    border-color: #6b7280;
    color: #1a1a1a;
}

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

/* Warning toast for reset action */
.toast-confirm.warning .toast-btn-confirm {
    background: #ef4444;
    color: white;
}

.toast-confirm.warning .toast-btn-confirm:hover {
    background: #dc2626;
}

/* Responsive adjustments for confirmation toast */
@media (max-width: 480px) {
    .toast-confirm {
        min-width: auto;
        max-width: calc(100vw - 40px);
    }
    
    .toast-actions {
        flex-direction: column-reverse;
    }
    
    .toast-btn {
        width: 100%;
    }
}
}