/* ============================================
   Ovulation Tracker - ovulationtracktool.org
   CSS Prefix: .ovu-
   Style: Warm, intimate, caring feminine health
   ============================================ */

:root {
    --ovu-primary: #c4956a;
    --ovu-primary-light: #d4b896;
    --ovu-primary-dark: #a67c52;
    --ovu-secondary: #8b9dc3;
    --ovu-accent: #e8a87c;
    --ovu-bg: #faf7f5;
    --ovu-bg-warm: #f5efe9;
    --ovu-bg-card: #ffffff;
    --ovu-text: #4a4a4a;
    --ovu-text-light: #7a7a7a;
    --ovu-text-muted: #999;
    --ovu-border: #e8e0d8;
    --ovu-shadow: 0 4px 20px rgba(0,0,0,0.06);
    --ovu-shadow-lg: 0 8px 40px rgba(0,0,0,0.1);
    --ovu-radius: 16px;
    --ovu-radius-sm: 8px;
    --ovu-transition: all 0.3s ease;
    --ovu-max-width: 1200px;
    --ovu-header-height: 70px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--ovu-text);
    background: var(--ovu-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.ovu-container {
    max-width: var(--ovu-max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.ovu-header {
    background: var(--ovu-bg-card);
    border-bottom: 1px solid var(--ovu-border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.ovu-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--ovu-header-height);
}

.ovu-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--ovu-text);
    text-decoration: none;
}

.ovu-logo span {
    color: var(--ovu-primary-dark);
}

.ovu-nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
    align-items: center;
}

.ovu-nav-link {
    display: block;
    padding: 10px 16px;
    border-radius: var(--ovu-radius-sm);
    color: var(--ovu-text-light);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--ovu-transition);
    min-height: 44px;
    display: flex;
    align-items: center;
}

.ovu-nav-link:hover,
.ovu-nav-link.active {
    color: var(--ovu-primary-dark);
    background: var(--ovu-bg-warm);
}

.ovu-nav-toggle {
    display: none;
    background: none;
    border: none;
    padding: 8px;
    color: var(--ovu-text);
    min-height: 44px;
    min-width: 44px;
}

.ovu-hero {
    padding: 60px 0 40px;
    background: linear-gradient(180deg, var(--ovu-bg-warm) 0%, var(--ovu-bg) 100%);
}

.ovu-hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.ovu-hero-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    color: var(--ovu-text);
    line-height: 1.2;
    margin-bottom: 16px;
}

.ovu-accent {
    color: var(--ovu-primary);
    position: relative;
}

.ovu-accent::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 100%;
    height: 8px;
    background: var(--ovu-primary-light);
    opacity: 0.3;
    z-index: -1;
    border-radius: 4px;
}

.ovu-hero-subtitle {
    font-size: 1.15rem;
    color: var(--ovu-text-light);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.ovu-tool-card {
    background: var(--ovu-bg-card);
    border-radius: var(--ovu-radius);
    padding: 40px;
    box-shadow: var(--ovu-shadow-lg);
    text-align: left;
}

.ovu-tool-inputs {
    display: grid;
    gap: 24px;
    margin-bottom: 32px;
}

.ovu-input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ovu-input-group label {
    font-weight: 600;
    color: var(--ovu-text);
    font-size: 0.95rem;
}

.ovu-input {
    padding: 14px 18px;
    border: 2px solid var(--ovu-border);
    border-radius: var(--ovu-radius-sm);
    font-size: 1rem;
    font-family: inherit;
    color: var(--ovu-text);
    background: var(--ovu-bg);
    transition: var(--ovu-transition);
    width: 100%;
}

.ovu-input:focus {
    outline: none;
    border-color: var(--ovu-primary);
    background: var(--ovu-bg-card);
}

.ovu-input-hint {
    font-size: 0.85rem;
    color: var(--ovu-text-muted);
}

.ovu-btn-primary {
    background: var(--ovu-primary);
    color: white;
    border: none;
    padding: 16px 32px;
    border-radius: var(--ovu-radius-sm);
    font-size: 1.05rem;
    font-weight: 600;
    transition: var(--ovu-transition);
    width: 100%;
    min-height: 48px;
}

.ovu-btn-primary:hover {
    background: var(--ovu-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(196, 149, 106, 0.3);
}

.ovu-btn-secondary {
    background: transparent;
    color: var(--ovu-primary-dark);
    border: 2px solid var(--ovu-border);
    padding: 10px 20px;
    border-radius: var(--ovu-radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--ovu-transition);
    min-height: 44px;
}

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

.ovu-results {
    margin-top: 32px;
    padding-top: 32px;
    border-top: 2px solid var(--ovu-border);
}

.ovu-results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.ovu-results-header h2 {
    font-size: 1.4rem;
    color: var(--ovu-text);
}

.ovu-dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.ovu-dash-card {
    background: var(--ovu-bg-warm);
    border-radius: var(--ovu-radius-sm);
    padding: 24px;
    text-align: center;
    border: 1px solid var(--ovu-border);
}

.ovu-dash-fertile {
    background: linear-gradient(135deg, #fef3e8, #fde8d0);
    border-color: #f5d5b5;
}

.ovu-dash-ovulation {
    background: linear-gradient(135deg, #fdf2f0, #fce0dc);
    border-color: #f5c8c0;
}

.ovu-dash-next {
    background: linear-gradient(135deg, #f0f4f8, #e0e8f0);
    border-color: #c8d8e8;
}

.ovu-dash-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ovu-text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.ovu-dash-value {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--ovu-text);
    margin-bottom: 4px;
}

.ovu-dash-sub {
    font-size: 0.85rem;
    color: var(--ovu-text-muted);
}

.ovu-fertility-meter {
    background: var(--ovu-bg);
    border-radius: var(--ovu-radius-sm);
    padding: 24px;
    margin-bottom: 24px;
}

.ovu-meter-label {
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--ovu-text);
}

.ovu-meter-bar {
    height: 12px;
    background: var(--ovu-border);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 8px;
}

.ovu-meter-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--ovu-primary-light), var(--ovu-primary));
    border-radius: 6px;
    transition: width 0.8s ease;
}

.ovu-meter-text {
    font-size: 0.9rem;
    color: var(--ovu-text-light);
    font-weight: 500;
}

.ovu-calendar-preview {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
    margin-top: 24px;
}

.ovu-cal-day {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: var(--ovu-radius-sm);
    font-size: 0.85rem;
    background: var(--ovu-bg);
    border: 1px solid var(--ovu-border);
}

.ovu-cal-day-header {
    font-weight: 600;
    color: var(--ovu-text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
}

.ovu-cal-day-period {
    background: #fce0dc;
    border-color: #f5c8c0;
    color: #c44;
}

.ovu-cal-day-fertile {
    background: #fef3e8;
    border-color: #f5d5b5;
    color: var(--ovu-primary-dark);
    font-weight: 700;
}

.ovu-cal-day-ovulation {
    background: var(--ovu-primary);
    color: white;
    border-color: var(--ovu-primary-dark);
    font-weight: 700;
}

.ovu-ad-section {
    padding: 24px 0;
    text-align: center;
    background: var(--ovu-bg);
}

.ovu-ad-section .ovu-container {
    display: flex;
    justify-content: center;
}

.ovu-products {
    padding: 60px 0;
    background: var(--ovu-bg-warm);
}

.ovu-section-title {
    font-size: 1.8rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 40px;
    color: var(--ovu-text);
}

.ovu-products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.ovu-product-card {
    background: var(--ovu-bg-card);
    border-radius: var(--ovu-radius);
    padding: 24px;
    box-shadow: var(--ovu-shadow);
    transition: var(--ovu-transition);
}

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

.ovu-product-img {
    height: 160px;
    border-radius: var(--ovu-radius-sm);
    margin-bottom: 16px;
}

.ovu-product-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--ovu-text);
}

.ovu-product-card p {
    font-size: 0.9rem;
    color: var(--ovu-text-light);
    margin-bottom: 16px;
    line-height: 1.5;
}

.ovu-product-link {
    color: var(--ovu-primary);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--ovu-transition);
}

.ovu-product-link:hover {
    color: var(--ovu-primary-dark);
}

.ovu-articles {
    padding: 60px 0;
    background: var(--ovu-bg);
}

.ovu-article-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
    margin-bottom: 48px;
    background: var(--ovu-bg-card);
    border-radius: var(--ovu-radius);
    overflow: hidden;
    box-shadow: var(--ovu-shadow);
}

.ovu-article-reverse {
    direction: rtl;
}

.ovu-article-reverse > * {
    direction: ltr;
}

.ovu-article-img {
    min-height: 300px;
    height: 100%;
}

.ovu-article-content {
    padding: 40px;
}

.ovu-article-content h3 {
    font-size: 1.4rem;
    margin-bottom: 8px;
    line-height: 1.3;
}

.ovu-article-content h3 a {
    color: var(--ovu-text);
    transition: var(--ovu-transition);
}

.ovu-article-content h3 a:hover {
    color: var(--ovu-primary);
}

.ovu-article-meta {
    font-size: 0.85rem;
    color: var(--ovu-text-muted);
    margin-bottom: 16px;
    font-weight: 500;
}

.ovu-article-content p {
    margin-bottom: 14px;
    color: var(--ovu-text-light);
    line-height: 1.7;
}

.ovu-article-content a {
    color: var(--ovu-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.ovu-read-more {
    display: inline-block;
    margin-top: 8px;
    font-weight: 600;
    color: var(--ovu-primary) !important;
    text-decoration: none !important;
}

.ovu-footer {
    background: var(--ovu-text);
    color: #b8b8b8;
    padding: 60px 0 24px;
}

.ovu-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.ovu-footer-brand .ovu-logo {
    color: white;
    margin-bottom: 16px;
}

.ovu-footer-brand p {
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 300px;
}

.ovu-footer-links h4 {
    color: white;
    font-size: 0.95rem;
    margin-bottom: 16px;
    font-weight: 600;
}

.ovu-footer-links ul {
    list-style: none;
}

.ovu-footer-links li {
    margin-bottom: 10px;
}

.ovu-footer-links a {
    color: #b8b8b8;
    font-size: 0.9rem;
    transition: var(--ovu-transition);
    display: block;
    min-height: 24px;
}

.ovu-footer-links a:hover {
    color: var(--ovu-primary-light);
}

.ovu-footer-bottom {
    border-top: 1px solid #555;
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    color: #888;
}

@media (max-width: 768px) {
    .ovu-nav-toggle {
        display: block;
    }

    .ovu-nav-menu {
        display: none;
        position: absolute;
        top: var(--ovu-header-height);
        left: 0;
        right: 0;
        background: var(--ovu-bg-card);
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--ovu-border);
        box-shadow: var(--ovu-shadow-lg);
        gap: 4px;
    }

    .ovu-nav-menu.active {
        display: flex;
    }

    .ovu-nav-link {
        width: 100%;
        padding: 14px 16px;
    }

    .ovu-hero {
        padding: 40px 0 24px;
    }

    .ovu-tool-card {
        padding: 24px;
    }

    .ovu-dashboard {
        grid-template-columns: 1fr;
    }

    .ovu-article-card,
    .ovu-article-reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }

    .ovu-article-img {
        min-height: 200px;
        order: -1;
    }

    .ovu-article-content {
        padding: 24px;
    }

    .ovu-products-grid {
        grid-template-columns: 1fr;
    }

    .ovu-footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }

    .ovu-calendar-preview {
        gap: 4px;
    }

    .ovu-cal-day {
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .ovu-container {
        padding: 0 16px;
    }

    .ovu-footer-grid {
        grid-template-columns: 1fr;
    }

    .ovu-results-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media print {
    .ovu-header,
    .ovu-ad-section,
    .ovu-products,
    .ovu-footer,
    .ovu-nav-toggle {
        display: none !important;
    }

    .ovu-hero {
        padding: 0;
    }

    .ovu-tool-card {
        box-shadow: none;
        border: 1px solid #ccc;
    }

    .ovu-results {
        display: block !important;
    }
}

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