/* CSS Variables */
:root {
    --font-heading: 'DM Sans', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --color-bg: #FFFFFF;
    --color-text: #111111;
    --color-text-muted: #555555;
    --color-gold: #C5A059;
    --color-testimonial-bg: #F0EEE8;
    --color-border: #E5E5E5;
    
    --nav-height: 56px;
    --max-width: 960px;
}

/* Reset & Base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 1rem;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

a {
    color: var(--color-text);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 4px;
}

a:hover {
    color: var(--color-text-muted);
}

p {
    margin-bottom: 1.25rem;
}

/* Layout */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 2rem 0;
}

/* Navigation */
nav {
    position: sticky;
    top: 0;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid transparent;
    z-index: 100;
    display: flex;
    align-items: center;
    transition: border-color 0.2s ease;
}

.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.nav-brand {
    letter-spacing: -0.03em;
    text-decoration: none;
    font-size: 1.6em;
}

.nav-45 {
    font-family: var(--font-heading);
    font-weight: 700;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color 0.2s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--color-text);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-text);
    color: var(--color-bg);
    padding: 0.75rem 1.25rem;
    text-decoration: none;
    font-weight: 500;
    font-family: var(--font-body);
    border: none;
    cursor: pointer;
    transition: background-color 0.2s ease;
    font-size: 0.95rem;
}

.btn:hover {
    background-color: #333333;
    color: var(--color-bg);
}

.btn-nav {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.cta-group {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-top: 2rem;
}

.cta-secondary {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* Hero Section */
.hero {
    min-height: 60vh;
    display: flex;
    align-items: center;
    padding-top: 4rem;
    padding-bottom: 4rem;
}

.credential-block {
    margin-bottom: 1.5rem;
}

.score-gold {
    color: var(--color-gold);
    font-family: var(--font-heading);
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.04em;
}

.score-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
    font-weight: 500;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.hero h2 {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
    max-width: 780px;
}

.muted-note {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
}

/* Subjects Section */
.subject-category {
    margin-bottom: 1.5rem;
}

.subject-category h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-text);
    padding-bottom: 0.25rem;
    display: inline-block;
}

.subject-row {
    display: flex;
    justify-content: space-between;
    padding: 0.25rem 0;
}

.subject-score {
    font-family: var(--font-mono);
    font-weight: 400;
}

.subject-intro {
    margin-bottom: 2.5rem;
    font-size: 1.1rem;
}

/* About Section Styles */
.about-portrait {
    width: 200px;
    height: 200px;
    float: right;
    margin-left: 2rem;
    margin-bottom: 1rem;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--color-border);
    filter: grayscale(0%);
}

.about-text {
    display: block;
}

/* How It Works */
.process-item {
    margin-bottom: 2rem;
}

.process-item strong {
    display: block;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

/* Testimonial */
.testimonial-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.testimonial-card {
    background-color: var(--color-testimonial-bg);
    padding: 2rem;
    border-left: 3px solid var(--color-gold);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
}

.testimonial-card::before {
    content: "“";
    position: absolute;
    top: 10px;
    left: 15px;
    font-family: var(--font-heading);
    font-size: 3rem;
    color: rgba(197, 160, 89, 0.2);
    line-height: 1;
}

.testimonial-text {
    font-size: 1rem;
    line-height: 1.5;
    font-style: italic;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}

.testimonial-block {
    background-color: var(--color-testimonial-bg);
    padding: 3rem;
    margin: 2rem 0;
}

/* Media Coverage */
.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.media-image {
    width: 100%;
    aspect-ratio: 3/2;
    background-color: #EEEEEE;
    margin-bottom: 1rem;
    object-fit: cover;
}

/* Rates Section */
#rates p {
    margin-bottom: 1rem;
}

/* Footer */
footer {
    padding: 3rem 0;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.85rem;
    text-align: center;
}

/* Blog List Page */
.blog-header {
    padding: 4rem 0 2rem 0;
    text-align: center;
}

.blog-header h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.blog-header p {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.post-list {
    margin: 3rem 0;
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.post-card {
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 2.5rem;
    transition: all 0.3s ease;
}

.post-card:last-child {
    border-bottom: none;
}

.post-meta {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-gold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.post-card h2 {
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.post-card h2 a {
    text-decoration: none;
    transition: color 0.2s ease;
}

.post-card h2 a:hover {
    color: var(--color-gold);
}

.post-excerpt {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.post-read-more {
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
    transition: transform 0.2s ease;
}

.post-card:hover .post-read-more {
    transform: translateX(4px);
    color: var(--color-gold);
}

/* Post detail page */
.post-container {
    max-width: 820px;
    margin: 0 auto;
    padding: 4rem 0;
}

.post-header {
    margin-bottom: 3rem;
}

.post-header h1 {
    font-size: 2.75rem;
    margin-bottom: 1rem;
    line-height: 1.15;
    letter-spacing: -0.03em;
}

.post-header-meta {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.post-content {
    font-size: 1.1rem;
    line-height: 1.75;
    color: #222222;
}

.post-content h2 {
    font-size: 1.75rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.post-content h3 {
    font-size: 1.35rem;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    letter-spacing: -0.01em;
}

.post-content p {
    margin-bottom: 1.5rem;
}

.post-content ul, .post-content ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.post-content li {
    margin-bottom: 0.5rem;
}

.post-content blockquote {
    border-left: 3px solid var(--color-gold);
    background-color: var(--color-testimonial-bg);
    padding: 1.5rem;
    margin: 2rem 0;
    font-style: italic;
}

/* Conversion CTA inside post */
.post-cta {
    background-color: #fcfbf9;
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-gold);
    padding: 2.5rem;
    margin: 4rem 0 2rem 0;
    border-radius: 4px;
}

.post-cta h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.post-cta p {
    font-size: 1rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.back-to-blog {
    margin-top: 3rem;
    display: inline-block;
    font-size: 0.95rem;
    color: var(--color-text-muted);
    text-decoration: none;
}

.back-to-blog:hover {
    color: var(--color-text);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2rem; }
    .hero { min-height: auto; padding-top: 2rem; }
    
    .cta-group {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .about-portrait {
        float: none;
        display: block;
        margin: 0 0 1.5rem 0;
        width: 100px;
        height: 100px;
    }

    .testimonial-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .nav-link {
        font-size: 0.85rem;
    }

    .btn-nav {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }

    .blog-header h1 {
        font-size: 2.25rem;
    }

    .post-header h1 {
        font-size: 2rem;
    }
}