/* Auditory Rhythm - Circadian Bioacoustics & Sensory Chronobiology */
:root {
    --ra-forest: #064e3b;
    --ra-forest-dark: #022c22;
    --ra-forest-light: #047857;
    --ra-copper: #b45309;
    --ra-copper-hover: #92400e;
    --ra-copper-light: #d97706;
    --ra-amber-bg: #fef3c7;
    --ra-mint: #10b981;
    --ra-mint-bg: #ecfdf5;
    --ra-bg-linen: #f4f7f4;
    --ra-card-bg: #ffffff;
    --ra-text-main: #1f2937;
    --ra-text-muted: #4b5563;
    --ra-border: #e2e8f0;
    --ra-shadow: 0 4px 18px rgba(6, 78, 59, 0.08);
    --ra-radius: 12px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--ra-bg-linen);
    color: var(--ra-text-main);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: "Georgia", "Times New Roman", serif;
    color: var(--ra-forest-dark);
    line-height: 1.3;
    font-weight: 700;
}

a {
    color: var(--ra-forest);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--ra-copper);
}

.ra-container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.ra-topbar {
    background-color: var(--ra-forest-dark);
    color: #e2e8f0;
    font-size: 13px;
    padding: 6px 0;
}

.ra-topbar-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ra-header {
    background-color: #ffffff;
    border-bottom: 2px solid #e5ede5;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.ra-navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.ra-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.ra-logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--ra-forest) 0%, var(--ra-copper) 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
}

.ra-logo-title {
    font-family: "Georgia", serif;
    font-size: 22px;
    font-weight: 700;
    color: var(--ra-forest-dark);
}

.ra-logo-subtitle {
    font-size: 11px;
    color: var(--ra-copper);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    font-weight: 600;
    display: block;
}

.ra-nav-menu {
    display: flex;
    list-style: none;
    gap: 22px;
    align-items: center;
}

.ra-nav-link {
    font-size: 15px;
    font-weight: 600;
    color: var(--ra-text-main);
    padding: 6px 10px;
    border-radius: 6px;
    transition: all 0.2s;
}

.ra-nav-link:hover, .ra-nav-link.active {
    color: var(--ra-forest);
    background-color: var(--ra-mint-bg);
}

.ra-nav-cta {
    background-color: var(--ra-forest);
    color: #ffffff !important;
    padding: 8px 18px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
}

.ra-nav-cta:hover {
    background-color: var(--ra-copper);
}

/* Hero */
.ra-hero {
    background: linear-gradient(180deg, #e9f2eb 0%, var(--ra-bg-linen) 100%);
    padding: 60px 0 50px;
    border-bottom: 1px solid #dbe6dc;
}

.ra-hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: center;
}

.ra-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: #ffffff;
    border: 1px solid #c7dccb;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    color: var(--ra-forest);
    font-weight: 600;
    margin-bottom: 18px;
}

.ra-hero h1 {
    font-size: 38px;
    margin-bottom: 20px;
}

.ra-hero-lead {
    font-size: 18px;
    color: var(--ra-text-muted);
    margin-bottom: 28px;
    line-height: 1.6;
}

.ra-hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.ra-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

.ra-btn-primary {
    background-color: var(--ra-forest);
    color: #ffffff;
}

.ra-btn-primary:hover {
    background-color: var(--ra-forest-light);
    color: #ffffff;
}

.ra-btn-secondary {
    background-color: #ffffff;
    color: var(--ra-forest);
    border: 1px solid #c0d7c5;
}

.ra-btn-secondary:hover {
    background-color: #f1f7f2;
}

.ra-hero-card {
    background-color: #ffffff;
    border-radius: var(--ra-radius);
    padding: 28px;
    border: 1px solid #d2e4d6;
    box-shadow: var(--ra-shadow);
}

.ra-hero-card h3 {
    font-size: 19px;
    margin-bottom: 14px;
    color: var(--ra-forest);
}

.ra-hero-card p {
    font-size: 14px;
    color: var(--ra-text-muted);
    margin-bottom: 16px;
}

/* Circadian Calculator Component */
.ra-calc-box {
    background: #ffffff;
    border-radius: var(--ra-radius);
    border: 1px solid #d2e4d6;
    padding: 32px;
    box-shadow: var(--ra-shadow);
    margin: 40px 0;
}

.ra-calc-header {
    margin-bottom: 24px;
    text-align: center;
}

.ra-calc-header h2 {
    font-size: 26px;
    margin-bottom: 8px;
}

.ra-calc-header p {
    color: var(--ra-text-muted);
    font-size: 15px;
}

.ra-calc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.ra-calc-control {
    margin-bottom: 20px;
}

.ra-calc-label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--ra-forest-dark);
}

.ra-calc-select, .ra-calc-input {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid #c7dccb;
    border-radius: 8px;
    font-size: 15px;
    background: #fafcfa;
    color: var(--ra-text-main);
}

.ra-calc-select:focus, .ra-calc-input:focus {
    outline: none;
    border-color: var(--ra-forest);
    box-shadow: 0 0 0 3px rgba(6, 78, 59, 0.15);
}

.ra-calc-result-panel {
    background: linear-gradient(135deg, #f0f7f2 0%, #e2efe5 100%);
    border-radius: 10px;
    padding: 24px;
    border: 1px solid #c3ded0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.ra-score-badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.ra-score-good {
    background: #d1fae5;
    color: #065f46;
}

.ra-score-warn {
    background: #fef3c7;
    color: #92400e;
}

.ra-calc-stat {
    margin-bottom: 12px;
}

.ra-calc-stat-label {
    font-size: 12px;
    color: var(--ra-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ra-calc-stat-val {
    font-size: 22px;
    font-weight: 700;
    color: var(--ra-forest-dark);
}

.ra-calc-note {
    font-size: 13px;
    color: var(--ra-text-muted);
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px dashed #b5d5c0;
}

/* Grid & Cards */
.ra-section {
    padding: 50px 0;
}

.ra-section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 40px;
}

.ra-section-header h2 {
    font-size: 30px;
    margin-bottom: 12px;
}

.ra-section-header p {
    color: var(--ra-text-muted);
    font-size: 16px;
}

.ra-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.ra-card {
    background-color: #ffffff;
    border-radius: var(--ra-radius);
    overflow: hidden;
    border: 1px solid #dce8de;
    box-shadow: 0 2px 12px rgba(6, 78, 59, 0.04);
    display: flex;
    flex-direction: column;
    transition: transform 0.2s, box-shadow 0.2s;
}

.ra-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 24px rgba(6, 78, 59, 0.08);
}

.ra-card-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.ra-tag {
    display: inline-block;
    padding: 4px 10px;
    background-color: var(--ra-mint-bg);
    color: var(--ra-forest);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    border-radius: 4px;
    margin-bottom: 12px;
}

.ra-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    line-height: 1.4;
}

.ra-card p {
    font-size: 14px;
    color: var(--ra-text-muted);
    margin-bottom: 20px;
    flex-grow: 1;
    line-height: 1.6;
}

.ra-card-footer {
    padding-top: 14px;
    border-top: 1px solid #edf3ee;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--ra-text-muted);
}

/* Article Detail */
.ra-article-wrap {
    padding: 45px 0 60px;
}

.ra-article-grid {
    display: grid;
    grid-template-columns: 2.2fr 1fr;
    gap: 40px;
}

.ra-article-body {
    background-color: #ffffff;
    border-radius: var(--ra-radius);
    padding: 40px;
    border: 1px solid #dce8de;
    box-shadow: 0 2px 14px rgba(6, 78, 59, 0.03);
}

.ra-article-meta {
    display: flex;
    gap: 14px;
    align-items: center;
    font-size: 13px;
    color: var(--ra-text-muted);
    margin-bottom: 20px;
    border-bottom: 1px solid #edf3ee;
    padding-bottom: 14px;
}

.ra-article-body h1 {
    font-size: 32px;
    margin-bottom: 24px;
}

.ra-article-body h2 {
    font-size: 22px;
    margin: 32px 0 16px;
    color: var(--ra-forest);
    border-left: 4px solid var(--ra-copper);
    padding-left: 12px;
}

.ra-article-body p {
    margin-bottom: 18px;
    color: #374151;
    line-height: 1.8;
}

.ra-article-body ul, .ra-article-body ol {
    margin: 18px 0 22px 24px;
    color: #374151;
}

.ra-article-body li {
    margin-bottom: 10px;
}

.ra-callout {
    background: #fdfaf3;
    border-left: 4px solid var(--ra-copper);
    padding: 20px 24px;
    border-radius: 0 8px 8px 0;
    margin: 28px 0;
    color: #78350f;
    font-size: 15px;
}

/* Sidebar */
.ra-sidebar {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.ra-widget {
    background-color: #ffffff;
    border-radius: var(--ra-radius);
    padding: 24px;
    border: 1px solid #dce8de;
}

.ra-widget h3 {
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--ra-forest);
    border-bottom: 2px solid #e7f0e9;
    padding-bottom: 8px;
}

.ra-data-list {
    list-style: none;
}

.ra-data-list li {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px dashed #e5ede7;
    font-size: 14px;
}

.ra-data-list li:last-child {
    border-bottom: none;
}

.ra-data-list span {
    color: var(--ra-text-muted);
}

.ra-data-list strong {
    color: var(--ra-forest-dark);
}

.ra-sidebar-links {
    list-style: none;
}

.ra-sidebar-links li {
    padding: 8px 0;
    border-bottom: 1px solid #f1f6f2;
}

.ra-sidebar-links a {
    color: var(--ra-forest);
    font-size: 14px;
    font-weight: 500;
}

.ra-sidebar-links a:hover {
    color: var(--ra-copper);
}

/* Footer */
.ra-footer {
    background-color: #022019;
    color: #d1d5db;
    padding: 55px 0 25px;
    margin-top: 60px;
    border-top: 4px solid var(--ra-copper);
}

.ra-footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 36px;
    margin-bottom: 40px;
}

.ra-footer h4 {
    color: #ffffff;
    font-size: 17px;
    margin-bottom: 16px;
}

.ra-footer p {
    font-size: 14px;
    color: #9ca3af;
    line-height: 1.6;
    margin-bottom: 14px;
}

.ra-footer-links {
    list-style: none;
}

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

.ra-footer-links a {
    color: #9ca3af;
    font-size: 14px;
}

.ra-footer-links a:hover {
    color: #fef3c7;
}

.ra-footer-entity {
    background-color: #032b22;
    border: 1px solid #094739;
    border-radius: 8px;
    padding: 16px;
    font-size: 13px;
    color: #9ca3af;
}

.ra-footer-entity strong {
    color: #fef3c7;
    display: block;
    margin-bottom: 6px;
}

.ra-footer-bottom {
    border-top: 1px solid #083c2f;
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: #6b7280;
    flex-wrap: wrap;
    gap: 12px;
}

@media (max-width: 992px) {
    .ra-hero-grid, .ra-article-grid, .ra-calc-grid {
        grid-template-columns: 1fr;
    }
    .ra-grid-3, .ra-footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .ra-grid-3, .ra-footer-grid {
        grid-template-columns: 1fr;
    }
    .ra-nav-menu {
        display: none;
    }
}