/* ========================================================
   HealthWellness4US Sleep Calculator CSS Stylesheet (Polished)
   ======================================================== */

.hw4us-sleep-calculator {
    margin: 20px auto;
    font-family: var(--font-body), sans-serif;
    color: var(--text-dark);
    max-width: 1000px;
    padding: 0 16px;
    box-sizing: border-box;
}

/* Hero Section */
.hw4us-sleep-calculator .sleep-calc-hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
    color: #ffffff;
    padding: 40px 24px;
    border-radius: 16px;
    text-align: center;
    margin-bottom: 24px;
    box-shadow: var(--shadow-lg);
}

.hw4us-sleep-calculator .sleep-calc-hero h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 900;
    color: #ffffff;
    margin: 0 0 12px 0;
    letter-spacing: -0.02em;
}

.hw4us-sleep-calculator .sleep-calc-hero .sleep-calc-subtitle {
    font-size: 1.05rem;
    color: #93c5fd;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.5;
}

/* Calculator Centered Layout */
.hw4us-sleep-calculator .sleep-calc-layout-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    margin-bottom: 32px;
}

/* Card Styling */
.hw4us-sleep-calculator .sleep-calc-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    padding: 28px;
    width: 100%;
    max-width: 700px;
    box-sizing: border-box;
}

/* Time Format Toggler */
.hw4us-sleep-calculator .format-toggle-container {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 16px;
}

.hw4us-sleep-calculator .toggle-btn {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    color: var(--text-dark);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.hw4us-sleep-calculator .toggle-btn:hover {
    background-color: var(--border-color);
}

.hw4us-sleep-calculator .toggle-btn:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 2px;
}

/* Tab Navigation */
.hw4us-sleep-calculator .sleep-calc-tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 24px;
    padding: 0;
    list-style: none;
    gap: 4px;
}

.hw4us-sleep-calculator .sleep-calc-tab-item {
    flex: 1;
}

.hw4us-sleep-calculator .sleep-calc-tab {
    width: 100%;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    padding: 12px 6px;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    box-sizing: border-box;
}

.hw4us-sleep-calculator .sleep-calc-tab:hover {
    color: var(--accent-blue);
    border-bottom-color: var(--border-color);
}

.hw4us-sleep-calculator .sleep-calc-tab[aria-selected="true"] {
    color: var(--accent-blue);
    border-bottom-color: var(--accent-blue);
}

.hw4us-sleep-calculator .sleep-calc-tab:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: -3px;
    border-radius: 4px 4px 0 0;
}

/* Tab Panel content */
.hw4us-sleep-calculator .sleep-calc-panel {
    display: none;
}

.hw4us-sleep-calculator .sleep-calc-panel.active {
    display: block;
}

/* Form Groups */
.hw4us-sleep-calculator .form-group {
    margin-bottom: 20px;
}

.hw4us-sleep-calculator .form-group label {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 6px;
}

.hw4us-sleep-calculator .form-group label span {
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-light);
}

.hw4us-sleep-calculator .input-row {
    display: flex;
    gap: 12px;
    align-items: center;
}

.hw4us-sleep-calculator .time-input,
.hw4us-sleep-calculator .select-input {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 14px;
    font-family: var(--font-body);
    font-size: 1.05rem;
    color: var(--text-dark);
    outline: none;
    width: 100%;
    box-sizing: border-box;
    transition: var(--transition);
}

.hw4us-sleep-calculator .time-input:focus,
.hw4us-sleep-calculator .select-input:focus {
    border-color: var(--accent-blue);
    background-color: var(--bg-white);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.hw4us-sleep-calculator .time-input:focus-visible,
.hw4us-sleep-calculator .select-input:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 2px;
}

/* Sleep Onset Control */
.hw4us-sleep-calculator .onset-control-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
}

.hw4us-sleep-calculator .onset-slider {
    flex-grow: 1;
    cursor: pointer;
}

.hw4us-sleep-calculator .onset-number-input {
    width: 80px;
    text-align: center;
}

/* Button */
.hw4us-sleep-calculator .btn-submit {
    display: block;
    width: 100%;
    background-color: var(--accent-blue);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    padding: 12px 20px;
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(37, 99, 235, 0.15);
    transition: var(--transition);
    text-align: center;
}

.hw4us-sleep-calculator .btn-submit:hover {
    background-color: var(--secondary);
    box-shadow: 0 6px 12px rgba(30, 58, 138, 0.2);
}

.hw4us-sleep-calculator .btn-submit:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 3px;
}

/* Results Section with Fade-in Animation */
.hw4us-sleep-calculator .sleep-results-container {
    margin-top: 24px;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    display: none;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.35s ease-out, transform 0.35s ease-out;
}

.hw4us-sleep-calculator .sleep-results-container.active {
    display: block;
}

.hw4us-sleep-calculator .sleep-results-container.visible {
    opacity: 1;
    transform: translateY(0);
}

.hw4us-sleep-calculator .results-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--primary);
}

.hw4us-sleep-calculator .results-summary {
    background-color: var(--bg-light);
    border-left: 4px solid var(--accent-teal);
    padding: 14px;
    border-radius: 0 8px 8px 0;
    margin-bottom: 16px;
    font-size: 0.9rem;
    line-height: 1.5;
}

.hw4us-sleep-calculator .results-summary strong {
    color: var(--primary);
}

/* Results Grid Cards */
.hw4us-sleep-calculator .results-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

@media (max-width: 600px) {
    .hw4us-sleep-calculator .results-cards-grid {
        grid-template-columns: 1fr;
    }
}

.hw4us-sleep-calculator .result-card {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    text-align: left;
    transition: var(--transition);
    background-color: var(--bg-white);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
}

.hw4us-sleep-calculator .result-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}



.hw4us-sleep-calculator .result-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.hw4us-sleep-calculator .result-card-time {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--primary);
}

.hw4us-sleep-calculator .result-card-cycles {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-dark);
}

.hw4us-sleep-calculator .result-card-duration {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 12px;
    line-height: 1.4;
}

.hw4us-sleep-calculator .result-card-badge {
    display: inline-block;
    font-size: 0.725rem;
    font-weight: 800;
    text-transform: uppercase;
    padding: 4px 8px;
    border-radius: 4px;
    align-self: flex-start;
}

/* Colors for badges */
.hw4us-sleep-calculator .result-card.optimal {
    border-top: 4px solid var(--accent-green);
}
.hw4us-sleep-calculator .result-card.optimal .result-card-badge {
    background-color: rgba(21, 128, 61, 0.08);
    color: var(--accent-green);
}

.hw4us-sleep-calculator .result-card.recommended {
    border-top: 4px solid var(--accent-blue);
}
.hw4us-sleep-calculator .result-card.recommended .result-card-badge {
    background-color: rgba(37, 99, 235, 0.08);
    color: var(--accent-blue);
}

.hw4us-sleep-calculator .result-card.minimum {
    border-top: 4px solid var(--accent-teal);
}
.hw4us-sleep-calculator .result-card.minimum .result-card-badge {
    background-color: rgba(13, 148, 136, 0.08);
    color: var(--accent-teal);
}

.hw4us-sleep-calculator .result-card.warning {
    border-top: 4px solid #f97316;
}
.hw4us-sleep-calculator .result-card.warning .result-card-badge {
    background-color: rgba(249, 115, 22, 0.08);
    color: #ea580c;
}



/* Warning Alerts */
.hw4us-sleep-calculator .insufficient-warning {
    background-color: #fff7ed;
    border: 1px solid #ffedd5;
    border-left: 4px solid #ea580c;
    border-radius: 8px;
    padding: 14px;
    margin-top: 16px;
    display: flex;
    gap: 10px;
    align-items: flex-start;
}

.hw4us-sleep-calculator .insufficient-warning-icon {
    font-size: 1.15rem;
    line-height: 1;
}

.hw4us-sleep-calculator .insufficient-warning-text {
    font-size: 0.85rem;
    line-height: 1.4;
    color: #7c2d12;
    margin: 0;
}

.hw4us-sleep-calculator .insufficient-warning-title {
    font-weight: 700;
    margin-bottom: 2px;
}

/* Sidebar Info widget (Responsive 2 columns) */
.hw4us-sleep-calculator .sleep-info-sidebar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    width: 100%;
    max-width: 700px;
    box-sizing: border-box;
}

@media (max-width: 650px) {
    .hw4us-sleep-calculator .sleep-info-sidebar {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

.hw4us-sleep-calculator .sleep-info-card {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
}

.hw4us-sleep-calculator .sleep-info-card h4 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 800;
    margin-bottom: 8px;
    color: var(--primary);
}

.hw4us-sleep-calculator .sleep-info-card p {
    font-size: 0.85rem;
    line-height: 1.45;
    color: var(--text-dark);
    margin: 0 0 8px 0;
}

.hw4us-sleep-calculator .sleep-info-card p:last-child {
    margin-bottom: 0;
}

/* Educational Content Section Styling */
.hw4us-sleep-calculator .sleep-calc-content {
    margin-top: 40px;
    line-height: 1.6;
    font-size: 1rem;
}

.hw4us-sleep-calculator .sleep-calc-content h2 {
    font-family: var(--font-heading);
    font-size: 1.65rem;
    font-weight: 800;
    margin-top: 32px;
    margin-bottom: 12px;
    color: var(--primary);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 6px;
}

.hw4us-sleep-calculator .sleep-calc-content h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-top: 20px;
    margin-bottom: 10px;
    color: var(--secondary);
}

.hw4us-sleep-calculator .sleep-calc-content p {
    margin-bottom: 14px;
}

.hw4us-sleep-calculator .sleep-calc-content ul {
    margin-bottom: 16px;
    padding-left: 20px;
}

.hw4us-sleep-calculator .sleep-calc-content li {
    margin-bottom: 6px;
}

/* Related articles cards */
.hw4us-sleep-calculator .related-articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin-top: 24px;
}

.hw4us-sleep-calculator .related-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.hw4us-sleep-calculator .related-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: rgba(37, 99, 235, 0.2);
}

.hw4us-sleep-calculator .related-card-title {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 6px;
    line-height: 1.3;
}

.hw4us-sleep-calculator .related-card:hover .related-card-title {
    color: var(--accent-blue);
}

.hw4us-sleep-calculator .related-card-excerpt {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.45;
    margin-bottom: 12px;
    flex-grow: 1;
}

.hw4us-sleep-calculator .related-card-link {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent-blue);
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Accordion FAQ */
.hw4us-sleep-calculator .faq-accordion-list {
    margin-top: 16px;
}

.hw4us-sleep-calculator .faq-accordion-item {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 10px;
    overflow: hidden;
    background-color: var(--bg-white);
}

.hw4us-sleep-calculator .faq-accordion-item h3 {
    margin: 0;
    padding: 0;
}

.hw4us-sleep-calculator .faq-accordion-trigger {
    width: 100%;
    background: none;
    border: none;
    text-align: left;
    padding: 16px 20px;
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.hw4us-sleep-calculator .faq-accordion-trigger:hover {
    background-color: var(--bg-light);
    color: var(--accent-blue);
}

.hw4us-sleep-calculator .faq-accordion-trigger:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: -3px;
    background-color: rgba(37, 99, 235, 0.05);
}

.hw4us-sleep-calculator .faq-accordion-trigger::after {
    content: '▼';
    font-size: 0.75rem;
    color: var(--text-light);
    transition: transform 0.25s ease;
}

.hw4us-sleep-calculator .faq-accordion-trigger[aria-expanded="true"] {
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-light);
}

.hw4us-sleep-calculator .faq-accordion-trigger[aria-expanded="true"]::after {
    transform: rotate(180deg);
}

.hw4us-sleep-calculator .faq-accordion-panel {
    padding: 16px 20px;
    background-color: var(--bg-white);
    line-height: 1.5;
    font-size: 0.9rem;
    display: none;
}

.hw4us-sleep-calculator .faq-accordion-panel.active {
    display: block;
}

/* Disclaimer Block */
.hw4us-sleep-calculator .sleep-calc-disclaimer {
    background-color: #f8fafc;
    border-left: 4px solid var(--accent-blue);
    padding: 20px;
    border-radius: 0 8px 8px 0;
    margin: 32px 0;
    font-size: 0.875rem;
    line-height: 1.55;
}

.hw4us-sleep-calculator .sleep-calc-disclaimer p {
    margin: 0;
}

/* E-E-A-T Author Card */
.hw4us-sleep-calculator .author-card {
    display: flex;
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    gap: 16px;
    align-items: center;
    margin-top: 32px;
}

@media (max-width: 600px) {
    .hw4us-sleep-calculator .author-card {
        flex-direction: column;
        text-align: center;
    }
}

.hw4us-sleep-calculator .author-avatar-wrap {
    flex-shrink: 0;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    overflow: hidden;
}

.hw4us-sleep-calculator .author-avatar-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hw4us-sleep-calculator .author-info h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 800;
    margin: 0 0 2px 0;
    color: var(--primary);
}

.hw4us-sleep-calculator .author-role {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--accent-teal);
    margin-bottom: 6px;
}

.hw4us-sleep-calculator .author-bio {
    font-size: 0.825rem;
    line-height: 1.45;
    color: var(--text-dark);
    margin: 0;
}

/* Sources section styling */
.hw4us-sleep-calculator .sources-section {
    margin-top: 32px;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

.hw4us-sleep-calculator .sources-section h4 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 800;
    margin-bottom: 10px;
    color: var(--primary);
}

.hw4us-sleep-calculator .sources-list {
    padding-left: 20px;
    margin: 0;
}

.hw4us-sleep-calculator .sources-list li {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 4px;
    line-height: 1.45;
}

.hw4us-sleep-calculator .sources-list a {
    color: var(--text-light);
    text-decoration: underline;
    transition: var(--transition);
}

.hw4us-sleep-calculator .sources-list a:hover {
    color: var(--accent-blue);
}

/* Screen reader text helper */
.screen-reader-text {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    word-wrap: normal !important;
}

/* Share & Actions Bar styling */
.hw4us-sleep-calculator .results-actions-bar {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.hw4us-sleep-calculator .action-btn {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    color: var(--text-dark);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.hw4us-sleep-calculator .action-btn:hover {
    background-color: var(--border-color);
    color: var(--accent-blue);
}

.hw4us-sleep-calculator .action-btn:focus-visible {
    outline: 3px solid var(--accent-blue);
    outline-offset: 2px;
}

/* Want Better Sleep CTA block */
.hw4us-sleep-calculator .sleep-calc-cta-section {
    background: linear-gradient(135deg, #1e3a8a 0%, #0d9488 100%);
    color: #ffffff;
    padding: 24px;
    border-radius: 12px;
    text-align: center;
    margin: 24px auto;
    max-width: 600px;
    box-shadow: var(--shadow-md);
    box-sizing: border-box;
}

.hw4us-sleep-calculator .sleep-calc-cta-section h4 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 800;
    color: #ffffff;
    margin: 0 0 8px 0;
}

.hw4us-sleep-calculator .sleep-calc-cta-section p {
    font-size: 0.95rem;
    color: #ccfbf1;
    margin: 0 0 16px 0;
    line-height: 1.5;
}

.hw4us-sleep-calculator .cta-link-btn {
    display: inline-block;
    background-color: #ffffff;
    color: #1e3a8a;
    padding: 10px 20px;
    border-radius: 6px;
    font-family: var(--font-heading);
    font-weight: 700;
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.hw4us-sleep-calculator .cta-link-btn:hover {
    background-color: var(--bg-light);
    transform: translateY(-1px);
}

/* Print Layout rules */
@media print {
    body > *:not(.hw4us-sleep-calculator) {
        display: none !important;
    }
    .hw4us-sleep-calculator .sleep-calc-hero,
    .hw4us-sleep-calculator .format-toggle-container,
    .hw4us-sleep-calculator .sleep-calc-tabs,
    .hw4us-sleep-calculator form,
    .hw4us-sleep-calculator .results-actions-bar,
    .hw4us-sleep-calculator .sleep-info-sidebar,
    .hw4us-sleep-calculator .sleep-calc-content-section,
    .hw4us-sleep-calculator .sleep-calc-cta-section,
    .hw4us-sleep-calculator .insufficient-warning {
        display: none !important;
    }
    .hw4us-sleep-calculator .sleep-results-container {
        display: block !important;
        border: none !important;
        padding: 0 !important;
        margin: 0 !important;
    }
    .hw4us-sleep-calculator .results-cards-grid {
        grid-template-columns: 1fr 1fr 1fr !important;
        gap: 12px !important;
    }
}