/* ===============================================
   AGE CALCULATOR - USING MODERNTOOLS UNIFIED THEME
   =============================================== */

/* Use modern tools color scheme */
:root {
    --primary-color: #3B82F6;
    --secondary-color: #10B981;
    --accent-color: #8B5CF6;
    --text-color: #111827;
    --text-secondary: #4B5563;
    --text-tertiary: #6B7280;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --border-color: #E5E7EB;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-base: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;    
    --radius-2xl: 1.5rem;
    
    /* Gray color scale for consistency */
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    
    /* Additional colors for age calculator functionality */
    --danger-color: #EF4444;
    --danger-light: #FCA5A5;
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --info-color: #3B82F6;
    
    /* Birthday and celebration colors */
    --birthday-primary: #FF6B6B;
    --birthday-secondary: #FFE66D;
    --milestone-color: #A78BFA;
    
    /* Aliases for compatibility with existing age calculator code */
    --brand-primary: var(--primary-color);
    --brand-secondary: var(--secondary-color);
    --text-primary: var(--text-color);
}

/* Dark theme using exact same colors as percentage calculator */
[data-theme="dark"] {
    --text-color: #F9FAFB;
    --text-secondary: #D1D5DB;
    --text-tertiary: #9CA3AF;
    --bg-primary: #111827;
    --bg-secondary: #1F2937;
    --bg-tertiary: #374151;
    --border-color: #374151;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    
    /* Gray color scale for dark theme */
    --gray-100: #374151;
    --gray-200: #4B5563;
    --gray-300: #6B7280;
    --gray-400: #9CA3AF;
}

/* Theme-aware background support */
body {
    background: var(--bg-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* Dark theme override for body */
[data-theme="dark"] body {
    background: var(--bg-primary);
}

/* Main Layout */
.main-content {
    min-height: 100vh;
}

/* ===============================================
   HERO SECTION STYLES
   =============================================== */

.tool-hero {
    margin-top: 0;
    padding: 120px 0 80px;
    position: relative;
    z-index: 2;
    background: linear-gradient(135deg, var(--bg-primary) 0%, rgba(59, 130, 246, 0.1) 30%, rgba(16, 185, 129, 0.1) 70%, var(--bg-primary) 100%);
    overflow: hidden;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 3;
}

.hero-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    margin: 0 auto 30px auto;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);
    border-radius: 50%;
    box-shadow: 
        0 15px 35px rgba(59, 130, 246, 0.4),
        0 0 0 10px rgba(59, 130, 246, 0.1),
        0 0 0 20px rgba(59, 130, 246, 0.05);
    position: relative;
    overflow: hidden;
}

.hero-icon::before {
    content: '';
    position: absolute;
    inset: -5px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), var(--accent-color));
    border-radius: 50%;
    z-index: -1;
    opacity: 0.4;
}

.hero-icon::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: conic-gradient(
        from 0deg, 
        var(--primary-color) 0%, 
        var(--secondary-color) 25%, 
        var(--accent-color) 50%, 
        var(--primary-color) 75%, 
        var(--secondary-color) 100%
    );
    border-radius: 50%;
    z-index: -2;
    opacity: 0.2;
}

.hero-icon i {
    font-size: 3rem;
    color: white;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    z-index: 2;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-color);
    margin: 0 0 20px 0;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    background: linear-gradient(135deg, var(--text-color) 0%, var(--primary-color) 50%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-content p {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
    font-weight: 500;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

/* Responsive hero adjustments */
@media (max-width: 768px) {
    .tool-hero {
        padding-top: 120;
    }
    
    .hero-icon {
        width: 80px;
        height: 80px;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.125rem;
    }
}

/* ===============================================
   CALCULATOR MAIN SECTION
   =============================================== */

.calculator-main {
    padding: 80px 0;
    background: var(--bg-primary);
}

.calculator-container {
    max-width: 900px;
    margin: 0 auto;
}

.calculator-card {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.calculator-card:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* ===============================================
   INPUT SECTION STYLES
   =============================================== */

.calculator-inputs {
    padding: 3rem;
}

.date-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.input-group {
    position: relative;
    z-index: auto;
}

.input-group label {
    display: block;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.75rem;
    font-size: 1rem;
}

.input-group input[type="date"] {
    width: 100%;
    padding: 1rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    background: var(--bg-primary);
    color: var(--text-color);
    transition: all 0.3s ease;
    font-family: inherit;
    position: relative;
    z-index: 1;
    pointer-events: auto;
    user-select: auto;
}

.input-group input[type="date"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Ensure input functionality across browsers */
.input-group input[type="date"]::-webkit-calendar-picker-indicator {
    cursor: pointer;
    opacity: 0.7;
}

.input-group input[type="date"]::-webkit-calendar-picker-indicator:hover {
    opacity: 1;
}

/* Dark theme support for date inputs */
[data-theme="dark"] .input-group input[type="date"] {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-color);
}

[data-theme="dark"] .input-group input[type="date"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

[data-theme="dark"] .input-group input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(1);
}

/* Error message styling */
.error-message {
    font-size: 0.875rem;
    color: var(--danger-color);
    margin-top: 0.5rem;
    padding: 0.5rem;
    border-radius: var(--radius-base);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    display: none;
}

.error-message.show {
    display: block;
}

.general-error {
    margin-bottom: 1rem;
    text-align: center;
    font-weight: 500;
}

[data-theme="dark"] .error-message {
    background: rgba(239, 68, 68, 0.2);
    border-color: rgba(239, 68, 68, 0.3);
    color: #FCA5A5;
}

/* Touch-friendly improvements */
.quick-btn {
    padding: 1rem 2rem;
    min-height: 44px;
    min-width: 120px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.input-group input[type="date"] {
    min-height: 48px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.input-group label {
    cursor: pointer;
    touch-action: manipulation;
}

/* Improved focus indicators for accessibility */
.quick-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.input-group input[type="date"]:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 1px;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Larger touch targets on mobile */
@media (max-width: 768px) {
    .quick-btn {
        padding: 1.25rem 2rem;
        font-size: 1rem;
    }
    
    .input-group input[type="date"] {
        padding: 1.25rem 1.5rem;
        font-size: 1.125rem;
        min-height: 52px;
    }
    
    .input-group label {
        font-size: 1.125rem;
        margin-bottom: 1rem;
    }
}

/* ===============================================
   RESULTS SECTION STYLES
   =============================================== */

.results-section {
    background: var(--bg-secondary);
    padding: 3rem;
    border-top: 1px solid var(--border-color);
}

/* Main Age Display */
.main-age-display {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-2xl);
    color: white;
    position: relative;
    overflow: hidden;
}

.main-age-display::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(255,255,255,0.2) 0%, transparent 50%);
}

.age-primary {
    position: relative;
    z-index: 1;
    margin-bottom: 1rem;
}

.age-years {
    font-size: 4rem;
    font-weight: 900;
    display: block;
}

.age-secondary {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.age-months, .age-days {
    font-size: 2rem;
    font-weight: 700;
}

.age-label {
    font-size: 0.875rem;
    font-weight: 500;
    opacity: 0.9;
    margin-left: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Age Details Grid */
.age-details {
    margin-bottom: 3rem;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
}

.detail-item {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.detail-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.detail-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.detail-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Birthday Section */
.birthday-section {
    margin-bottom: 3rem;
}

.birthday-card {
    background: linear-gradient(135deg, var(--birthday-primary), var(--birthday-secondary));
    border-radius: var(--radius-xl);
    padding: 2rem;
    color: white;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    position: relative;
    overflow: hidden;
}

.birthday-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255,255,255,0.1) 0%, transparent 50%);
}

.birthday-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 1;
}

.birthday-content {
    position: relative;
    z-index: 1;
}

.birthday-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.birthday-countdown {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.countdown-value {
    font-size: 2rem;
    font-weight: 800;
}

.countdown-label {
    font-size: 1rem;
    opacity: 0.9;
}

.birthday-date {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Milestones Section */
.milestones-section {
    margin-bottom: 3rem;
}

.milestones-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.life-stage {
    background: linear-gradient(135deg, var(--accent-color), var(--milestone-color));
    border-radius: var(--radius-xl);
    padding: 2rem;
    color: white;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.stage-icon {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    backdrop-filter: blur(10px);
}

.stage-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stage-description {
    font-size: 0.875rem;
    opacity: 0.9;
}

.milestones-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.milestone-item {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.3s ease;
}

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

.milestone-item.reached {
    background: linear-gradient(135deg, var(--success-color), var(--accent-color));
    color: white;
    border-color: var(--success-color);
}

.milestone-item.upcoming {
    border-color: var(--warning-color);
    background: #FEF3C7;
    color: #92400E;
}

[data-theme="dark"] .milestone-item.upcoming {
    background: var(--bg-tertiary);
    border-color: var(--warning-color);
    color: var(--text-color);
}

[data-theme="dark"] .milestone-item.upcoming .milestone-title {
    color: var(--warning-color);
}

[data-theme="dark"] .milestone-item.upcoming .milestone-age {
    color: var(--text-secondary);
}

.fact-item {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

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

[data-theme="dark"] .fact-item {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
}

[data-theme="dark"] .fact-title {
    color: var(--text-color);
}

[data-theme="dark"] .fact-description {
    color: var(--text-secondary);
}

/* Fun Facts Section */
.fun-facts-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.facts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.fact-item {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

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

.fact-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-bottom: 1rem;
}

.fact-title {
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.fact-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ===============================================
   RESPONSIVE DESIGN
   =============================================== */

@media (max-width: 768px) {
    .tool-hero {
        padding-top: 120;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.125rem;
    }
    
    .calculator-inputs {
        padding: 2rem;
    }
    
    .results-section {
        padding: 2rem;
    }
    
    .date-inputs {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .age-secondary {
        gap: 1rem;
    }
    
    .age-months, .age-days {
        font-size: 1.5rem;
    }
    
    .detail-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .birthday-card {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .life-stage {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .facts-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .calculator-inputs {
        padding: 1.5rem;
    }
    
    .results-section {
        padding: 1.5rem;
    }
    
    .age-years {
        font-size: 3rem;
    }
    
    .main-age-display {
        padding: 1.5rem;
    }
    
    .detail-grid {
        grid-template-columns: 1fr;
    }
    
    .quick-actions {
        flex-direction: column;
    }
    
    .quick-btn {
        justify-content: center;
    }
}

/* ===============================================
   DARK THEME OVERRIDES
   =============================================== */

[data-theme="dark"] .calculator-card {
    background: var(--bg-secondary);
}

[data-theme="dark"] .detail-item {
    background: var(--bg-tertiary);
}

[data-theme="dark"] .fact-item {
    background: var(--bg-tertiary);
}

[data-theme="dark"] .milestone-item {
    background: var(--bg-tertiary);
}

[data-theme="dark"] .milestone-item.upcoming {
    background: var(--bg-tertiary);
    border-color: var(--warning-color);
    color: var(--text-color);
}

[data-theme="dark"] .milestone-item.upcoming .milestone-title {
    color: var(--warning-color);
}

[data-theme="dark"] .milestone-item.upcoming .milestone-age {
    color: var(--text-secondary);
}

/* ===============================================
   ANIMATIONS AND TRANSITIONS - REMOVED FOR PERFORMANCE
   =============================================== */

.input-helper {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-top: 0.5rem;
}

.quick-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.quick-btn {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    min-height: 44px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

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

.quick-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}