/* --- Premium Re-design Design Tokens & Variables for Date Calculator Hub --- */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
    --font-display: 'Outfit', Arial, sans-serif;
    --font-sans: 'Outfit', Arial, sans-serif;
    --font-mono: 'Inconsolata', monospace;
    
    /* Curated harmonious color palettes (Tailored HSL) */
    --bg-dark-start: hsl(222, 47%, 7%);
    --bg-dark-end: hsl(224, 71%, 4%);
    
    --brand-primary: hsl(340, 71%, 54%); /* vibrant pink */
    --brand-accent: hsl(190, 90%, 45%); /* glowing cyan */
    --brand-info: hsl(210, 90%, 50%); /* bright blue */
    --brand-success: hsl(150, 70%, 45%); /* emerald green */
    
    --text-main: hsl(215, 25%, 27%);
    --text-muted: hsl(218, 11%, 47%);
    --text-light: hsl(210, 40%, 98%);
    --text-light-muted: hsl(215, 20%, 75%);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Ensure font family override is applied to content elements */
#fh5co-date-calculator,
.hero-section,
.breadcrumbs-wrapper,
.faq-section {
    font-family: var(--font-sans) !important;
}

#fh5co-date-calculator h1, 
#fh5co-date-calculator h2, 
#fh5co-date-calculator h3, 
#fh5co-date-calculator p,
.hero-section h1, 
.hero-section p,
.faq-section h2, 
.faq-section summary, 
.faq-section p {
    font-family: var(--font-sans) !important;
}

/* --- Hero Section Redesign --- */
.hero-section {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    position: relative;
    padding: 60px 0;
    text-align: center;
    color: var(--text-main);
    overflow: hidden;
    border-bottom: 1px solid #e2e8f0;
}

/* Subtle radial grid overlay for depth */
.hero-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: radial-gradient(hsla(220, 20%, 80%, 0.4) 1px, transparent 1px);
    background-size: 24px 24px;
    pointer-events: none;
}

.hero-section__container {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-section h1 {
    font-size: 42px;
    font-weight: 800;
    margin: 0 0 12px 0;
    letter-spacing: -0.02em;
    background: linear-gradient(to right, hsl(222, 47%, 11%) 40%, var(--brand-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-section p {
    font-size: 16px;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
    font-weight: 400;
}

/* --- Section Layout --- */
.calculator-section {
    padding: 60px 0;
    background: #f8fafc;
}

/* Grid layout for the landing cards */
.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-top: 20px;
}

/* --- Premium Cards Redesign --- */
.calculator-premium-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 36px 28px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow: hidden;
    height: 100%;
}

/* Accent top borders for cards to represent their personality */
.calculator-premium-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    transition: var(--transition-smooth);
}

.card-diff::after { background: var(--brand-info); }
.card-offset::after { background: var(--brand-primary); }
.card-age::after { background: var(--brand-success); }

/* Hover effects */
.calculator-premium-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: #cbd5e1;
}

.calculator-premium-card:hover::after {
    height: 6px;
}

/* SVG Icon styles */
.calculator-svg-wrapper {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: var(--transition-smooth);
    position: relative;
}

.card-diff .calculator-svg-wrapper {
    background: hsla(210, 90%, 50%, 0.1);
    color: var(--brand-info);
}

.card-offset .calculator-svg-wrapper {
    background: hsla(340, 71%, 54%, 0.1);
    color: var(--brand-primary);
}

.card-age .calculator-svg-wrapper {
    background: hsla(150, 70%, 45%, 0.1);
    color: var(--brand-success);
}

/* Glow effects on hover */
.calculator-premium-card:hover .calculator-svg-wrapper {
    transform: scale(1.1);
}

.card-diff:hover .calculator-svg-wrapper {
    box-shadow: 0 0 20px hsla(210, 90%, 50%, 0.25);
}
.card-offset:hover .calculator-svg-wrapper {
    box-shadow: 0 0 20px hsla(340, 71%, 54%, 0.25);
}
.card-age:hover .calculator-svg-wrapper {
    box-shadow: 0 0 20px hsla(150, 70%, 45%, 0.25);
}

.calculator-premium-card h3 {
    font-size: 22px;
    font-weight: 700;
    color: hsl(222, 47%, 11%);
    margin: 0 0 12px 0;
}

.calculator-premium-card p {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 30px;
    flex-grow: 1;
}

/* --- Premium Buttons Redesign --- */
.calculator-action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    text-decoration: none !important;
    transition: var(--transition-smooth);
    width: 100%;
}

.card-diff .calculator-action-btn {
    background: var(--brand-info);
    color: #ffffff;
    box-shadow: 0 4px 14px hsla(210, 90%, 50%, 0.25);
}
.card-diff .calculator-action-btn:hover {
    background: hsl(210, 95%, 42%);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px hsla(210, 90%, 50%, 0.4);
}

.card-offset .calculator-action-btn {
    background: var(--brand-primary);
    color: #ffffff;
    box-shadow: 0 4px 14px hsla(340, 71%, 54%, 0.25);
}
.card-offset .calculator-action-btn:hover {
    background: hsl(340, 75%, 46%);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px hsla(340, 71%, 54%, 0.4);
}

.card-age .calculator-action-btn {
    background: var(--brand-success);
    color: #ffffff;
    box-shadow: 0 4px 14px hsla(150, 70%, 45%, 0.25);
}
.card-age .calculator-action-btn:hover {
    background: hsl(150, 75%, 38%);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px hsla(150, 70%, 45%, 0.4);
}

/* --- FAQ Accordion Section --- */
.faq-section {
    padding: 60px 0 80px 0;
    background: #ffffff;
    border-top: 1px solid #e2e8f0;
}

.faq-container {
    max-width: 850px;
    margin: 0 auto;
    padding: 0 20px;
}

.faq-title {
    font-size: 32px;
    font-weight: 800;
    color: hsl(222, 47%, 11%);
    text-align: center;
    margin-bottom: 40px;
    letter-spacing: -0.02em;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

details.faq-accordion {
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    background: #ffffff;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

details.faq-accordion:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: #cbd5e1;
}

details.faq-accordion summary {
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 600;
    color: hsl(222, 47%, 11%);
    background: #ffffff;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    outline: none;
    user-select: none;
    transition: background-color 0.2s ease;
}

details.faq-accordion summary::-webkit-details-marker {
    display: none;
}

details.faq-accordion summary:hover {
    background-color: #f8fafc;
}

details.faq-accordion[open] summary {
    background-color: #f1f5f9;
    border-bottom: 1px solid #e2e8f0;
}

/* Custom chevron rotation */
details.faq-accordion summary::after {
    content: '';
    width: 8px;
    height: 8px;
    border-right: 2px solid #64748b;
    border-bottom: 2px solid #64748b;
    transform: rotate(45deg);
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    margin-right: 6px;
    flex-shrink: 0;
}

details.faq-accordion[open] summary::after {
    transform: rotate(-135deg);
}

.faq-content {
    padding: 24px;
    color: var(--text-main);
    font-size: 15px;
    line-height: 1.65;
    background: #ffffff;
}

.faq-content p {
    margin: 0 0 12px 0;
}
.faq-content p:last-child {
    margin-bottom: 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .hero-section {
        padding: 40px 0;
    }
    .hero-section h1 {
        font-size: 32px;
    }
    .calculator-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .faq-title {
        font-size: 26px;
        margin-bottom: 30px;
    }
    .sub-results-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px;
    }
    .calculator-card {
        padding: 24px !important;
    }
    .form-card {
        padding: 16px !important;
    }
}

/* --- Calculator Form & Result Styles --- */
.calculator-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-md);
    margin-top: 30px;
}

.date-input-group-title {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 700;
    color: hsl(222, 47%, 11%);
    margin: 0 0 20px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    transition: var(--transition-smooth);
}

.form-card:hover {
    border-color: #cbd5e1;
    box-shadow: var(--shadow-sm);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: hsl(222, 47%, 20%);
    margin-bottom: 8px;
    display: block;
}

.form-control {
    background: #ffffff;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    color: var(--text-main);
    font-size: 15px;
    height: 44px;
    padding: 0 14px;
    width: 100%;
    box-shadow: none;
    transition: var(--transition-smooth);
    font-family: var(--font-sans);
}

.form-control:focus {
    outline: none;
    border-color: var(--brand-info);
    box-shadow: 0 0 12px hsla(210, 90%, 50%, 0.15);
    background: #ffffff;
}

input[type="date"].form-control,
input[type="time"].form-control {
    padding: 0 12px;
}

/* Custom switches / toggles */
.options-row {
    margin-top: 24px;
    padding: 20px 24px;
    background-color: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

.custom-toggle-container {
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    position: relative;
    user-select: none;
    font-weight: 500 !important;
    font-size: 15px;
    color: var(--text-main);
    margin: 0;
}

.custom-toggle-input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.custom-toggle-slider {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    background-color: #cbd5e1;
    border-radius: 24px;
    margin-right: 12px;
    transition: var(--transition-smooth);
    flex-shrink: 0;
}

.custom-toggle-slider::before {
    content: "";
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: var(--transition-smooth);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.custom-toggle-input:checked + .custom-toggle-slider {
    background-color: var(--brand-info);
}

.custom-toggle-input:checked + .custom-toggle-slider::before {
    transform: translateX(20px);
}

.custom-toggle-input:focus + .custom-toggle-slider {
    box-shadow: 0 0 0 2px hsla(210, 90%, 50%, 0.2);
}

/* Action & Preset Buttons */
.action-row {
    margin-top: 32px;
    text-align: center;
}

.btn-calculate {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    background: var(--brand-primary);
    color: #ffffff !important;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 4px 14px hsla(340, 71%, 54%, 0.25);
    transition: var(--transition-smooth);
    cursor: pointer;
}

.btn-calculate:hover {
    background: hsl(340, 75%, 46%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px hsla(340, 71%, 54%, 0.4);
}

.btn-calculate:active {
    transform: translateY(-0.5px);
}

.presets {
    margin-top: 16px;
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.btn-preset {
    background: #ffffff;
    border: 1px solid #cbd5e1;
    color: var(--text-main);
    font-size: 13px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 20px;
    transition: var(--transition-smooth);
    cursor: pointer;
}

.btn-preset:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
    background: hsla(340, 71%, 54%, 0.05);
    transform: translateY(-1px);
}

/* Results panel */
.result-container {
    margin-top: 36px;
    padding: 32px;
    background: linear-gradient(135deg, hsl(210, 40%, 96%) 0%, #ffffff 100%);
    border: 1px solid hsl(210, 30%, 88%);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    animation: fadeInUp 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.result-title {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 800;
    color: hsl(222, 47%, 11%);
    margin-bottom: 20px;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.main-result {
    font-size: 32px;
    font-weight: 800;
    color: var(--brand-primary);
    text-align: center;
    padding: 16px 20px;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    margin-bottom: 28px;
    box-shadow: var(--shadow-sm);
    letter-spacing: -0.01em;
}

.main-result span {
    color: hsl(222, 47%, 11%);
}

.sub-results {
    margin-top: 24px;
}

.sub-results-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.result-item {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 16px 12px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.result-item:hover {
    transform: translateY(-2px);
    border-color: var(--brand-info);
}

.result-item .label {
    display: block;
    font-size: 12px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
}

.result-item .value {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: hsl(222, 47%, 11%);
    font-family: var(--font-mono);
}

#diff-weeks-desc {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
}

/* SEO Description Layout */
.seo-section-card {
    margin-top: 60px;
    padding: 40px;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
}

.seo-section-card h2 {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 800;
    color: hsl(222, 47%, 11%);
    margin-top: 0;
    margin-bottom: 20px;
    border-bottom: 2px solid hsl(210, 40%, 96%);
    padding-bottom: 10px;
}

.seo-section-card h3 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: hsl(222, 47%, 11%);
    margin-top: 28px;
    margin-bottom: 12px;
}

.seo-section-card p {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-main);
    margin-bottom: 16px;
}

.seo-section-card p:last-child {
    margin-bottom: 0;
}

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

/* --- Operation Segment Controller for Add/Subtract --- */
.operation-toggle-container {
    display: flex;
    justify-content: center;
    margin-bottom: 25px;
}

.operation-toggle {
    display: inline-flex;
    background: #f1f5f9;
    padding: 6px;
    border-radius: 30px;
    border: 1px solid #cbd5e1;
    box-shadow: var(--shadow-sm);
    align-items: center;
    gap: 4px;
}

.operation-toggle-btn {
    padding: 8px 28px;
    border-radius: 20px;
    border: none;
    background: transparent;
    color: var(--text-main);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    user-select: none;
}

.operation-toggle-btn:hover {
    color: var(--brand-primary);
}

.operation-toggle-btn input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.operation-toggle-btn:has(input:checked) {
    background: var(--brand-primary);
    color: #ffffff !important;
    box-shadow: 0 4px 12px hsla(340, 71%, 54%, 0.25);
}