:root {
    --bg-color: #FFFFFF;
    --text-color: #121212;
    --accent-green: #8AAFBA;
    --accent-blue: #A7E2FF;
    --accent-purple: #F0D0FF;
    --accent-yellow: #FFF069;
    --font-primary: 'Inter', sans-serif;
    --font-mono: 'DM Mono', monospace;
    --border-width: 2px;
}

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

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

h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

a {
    color: inherit;
    text-decoration: none;
    transition: all 0.2s ease;
}

img {
    max-width: 100%;
    display: block;
}

/* Utility Classes */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-mono);
    font-weight: 500;
    text-transform: uppercase;
    border: var(--border-width) solid var(--text-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--text-color);
    color: var(--bg-color);
}

.btn-primary:hover {
    background-color: var(--bg-color);
    color: var(--text-color);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-color);
}

.btn-secondary:hover {
    background-color: var(--accent-yellow);
}

/* Header */
.site-header {
    padding: 1.5rem 0;
    border-bottom: var(--border-width) solid var(--text-color);
    margin-bottom: 2rem;
    background-color: var(--bg-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-primary);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
}

.logo a {
    text-decoration: none;
}

.logo .divider {
    margin: 0 0.5rem;
    color: #666;
}

.site-title {
    font-weight: 400;
    color: #444;
}

.site-header nav a {
    margin-left: 2rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    text-transform: uppercase;
    position: relative;
}

.site-header nav a:hover {
    text-decoration: underline;
}

.nav-cta {
    background-color: var(--text-color);
    color: var(--bg-color) !important;
    padding: 0.4rem 1.2rem;
    border: var(--border-width) solid var(--text-color);
    font-weight: 500;
}

.nav-cta:hover {
    background-color: var(--bg-color);
    color: var(--text-color) !important;
    text-decoration: none !important;
}

/* Hero Section */
.hero {
    padding: 6rem 0;
    text-align: left;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
}

.hero-text {
    font-size: 1.25rem;
    max-width: 600px;
    margin-bottom: 2.5rem;
    color: #333;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

/* Section Common Styles */
section {
    padding: 4rem 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    border-bottom: 1px solid #ddd;
    padding-bottom: 1rem;
}

.section-header h2 {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    margin-bottom: 0;
}

/* Training Section */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 2rem;
}

.video-card {
    border: var(--border-width) solid var(--text-color);
    background: var(--bg-color);
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-bottom: var(--border-width) solid var(--text-color);
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.video-info {
    padding: 1.5rem;
}

.video-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.video-info p {
    font-size: 0.95rem;
    color: #555;
}

/* Filters */
.filters {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: none;
    border: 1px solid #ddd;
    padding: 0.4rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn:hover, .filter-btn.active {
    background-color: var(--text-color);
    color: var(--bg-color);
    border-color: var(--text-color);
}

/* Persona Sections */
.persona-section {
    margin-bottom: 3rem;
}

.persona-section:last-child {
    margin-bottom: 0;
}

/* Meta Skill Callout */
.meta-callout {
    border: var(--border-width) solid var(--text-color);
    border-left-width: 6px;
    padding: 2rem;
    margin-bottom: 2rem;
    background-color: #fafafa;
}

.meta-callout-body {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 2rem;
}

.meta-callout-text {
    flex: 1;
}

.meta-callout-text h3 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.meta-objective {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: #555;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
}

.meta-desc {
    font-size: 0.95rem;
    color: #444;
    line-height: 1.5;
}

.meta-install-btn {
    white-space: nowrap;
    flex-shrink: 0;
    align-self: center;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.skill-card {
    border: var(--border-width) solid var(--text-color);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    background-color: var(--bg-color);
}

.skill-card:hover {
    transform: translateY(-4px);
    box-shadow: 4px 4px 0px rgba(0,0,0,1);
}

.skill-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.skill-category {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
    text-transform: uppercase;
    font-weight: 500;
}

.skill-status-badge {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    text-transform: uppercase;
    font-weight: 500;
    border: 1px solid currentColor;
    white-space: nowrap;
}

.skill-status-preview {
    color: #888;
    border-color: #ccc;
}

.skill-status-official {
    color: #1a6b3c;
    border-color: #1a6b3c;
    background-color: #edf7f1;
}

.meta-callout-heading {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 0.5rem;
}

.meta-callout-heading h3 {
    margin-bottom: 0;
}

.skill-title {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.skill-desc {
    font-size: 1rem;
    color: #444;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.skill-meta {
    margin-top: auto;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    border: 1px solid #ddd;
    padding: 0.2rem 0.5rem;
    color: #666;
}

.download-btn {
    display: block;
    width: 100%;
    text-align: center;
    background-color: var(--text-color);
    color: var(--bg-color);
    padding: 0.75rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    font-weight: 500;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

.download-btn:hover {
    background-color: #333;
}

.card-links,
.meta-links {
    display: flex;
    gap: 1rem;
    margin-top: 0.75rem;
    justify-content: flex-end;
}

.meta-links {
    justify-content: flex-start;
}

.traces-link,
.edit-link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: #999;
}

.traces-link:hover,
.edit-link:hover {
    color: #666;
    text-decoration: underline;
}

.no-results {
    font-family: var(--font-mono);
    color: #666;
    text-align: center;
    padding: 3rem 0;
}

.loading-msg {
    font-family: var(--font-mono);
    color: #999;
    text-align: center;
    padding: 3rem 0;
}

/* Install Page */
.install-hero {
    padding: 4rem 0 2rem;
}

.install-hero h1 {
    font-size: 3rem;
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
}

.install-subtitle {
    font-size: 1.15rem;
    color: #444;
    max-width: 600px;
    line-height: 1.6;
}

.install-tier {
    padding: 3rem 0;
}

.install-tier-alt {
    background-color: #fafafa;
    border-top: 1px solid #eee;
    border-bottom: 1px solid #eee;
}

.install-tier-heading {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.install-tier-desc {
    font-size: 1rem;
    color: #444;
    max-width: 600px;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.install-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
}

.install-card {
    border: var(--border-width) solid var(--text-color);
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    background-color: var(--bg-color);
}

.install-card:hover {
    transform: translateY(-4px);
    box-shadow: 4px 4px 0px rgba(0, 0, 0, 1);
}

.install-card-header {
    margin-bottom: 1rem;
}

.install-card-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    text-transform: uppercase;
    background-color: var(--accent-yellow);
    padding: 0.2rem 0.6rem;
    margin-bottom: 0.75rem;
}

.install-card-header h2 {
    font-size: 1.75rem;
    margin-bottom: 0;
}

.install-card-desc {
    font-size: 1rem;
    color: #444;
    line-height: 1.6;
    margin-bottom: 1.25rem;
}

.install-card-features {
    list-style: none;
    margin-bottom: 2rem;
    flex-grow: 1;
}

.install-card-features li {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: #555;
    padding: 0.3rem 0;
    padding-left: 1.25rem;
    position: relative;
}

.install-card-features li::before {
    content: "\2713";
    position: absolute;
    left: 0;
    color: #333;
}

.install-card-btn {
    display: block;
    width: 100%;
    text-align: center;
    margin-top: auto;
}

.install-card-btn-soon {
    background-color: #ccc;
    border-color: #ccc;
    color: #666;
    cursor: default;
}

.install-card-btn-soon:hover {
    background-color: #ccc;
    color: #666;
}

.install-dev-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 1.5rem;
}

.install-dev-option {
    border: 1px solid #ddd;
    padding: 1.5rem;
}

.install-dev-option h3 {
    font-family: var(--font-mono);
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.install-dev-option p {
    font-size: 0.9rem;
    color: #555;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.install-dev-link {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: underline;
}

.install-dev-link:hover {
    color: #555;
}

/* Footer */
.site-footer {
    background-color: var(--text-color);
    color: var(--bg-color);
    padding: 4rem 0;
    margin-top: 4rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-left h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.footer-left p {
    font-size: 0.9rem;
    color: #aaa;
    line-height: 1.5;
}

.footer-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
}

.footer-right a {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: #aaa;
}

.footer-right a:hover {
    color: #fff;
    text-decoration: underline;
}

.copyright {
    margin-top: 1.5rem;
    font-size: 0.8rem;
    color: #666;
}

/* Responsive */
@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .site-header nav a {
        margin-left: 0;
        margin-right: 1.5rem;
    }

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

    .video-grid {
        grid-template-columns: 1fr;
    }

    .meta-callout-body {
        flex-direction: column;
    }

    .meta-install-btn {
        align-self: stretch;
        text-align: center;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
    }

    .footer-right {
        align-items: flex-start;
    }

    .install-hero h1 {
        font-size: 2rem;
    }

    .install-cards {
        grid-template-columns: 1fr;
    }

    .install-dev-options {
        grid-template-columns: 1fr;
    }

    .nav-cta {
        padding: 0.3rem 0.8rem;
    }
}