/* style.css - Full Responsive Light Theme */
:root { 
    --primary: #007AFF; 
    --bg: #ffffff; 
    --text: #1d1d1f; 
    --card: #f5f5f7; 
    --border: #d2d2d7;
    --code-bg: #1c1c1e;
}

html { scroll-behavior: smooth; }

body { 
    margin: 0; 
    font-family: 'Inter', sans-serif; 
    background: var(--bg); 
    color: var(--text); 
    line-height: 1.6; 
    -webkit-font-smoothing: antialiased;
}

/* --- Navigation & Header --- */
nav { 
    display: flex; 
    justify-content: space-between; 
    padding: 1rem 10%; 
    align-items: center; 
    border-bottom: 1px solid var(--border);
    background: white;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo { display: flex; align-items: center; }
.logo img { height: 45px; width: auto; }

nav ul { display: flex; list-style: none; gap: 2rem; margin: 0; padding: 0; }
nav a { color: var(--text); text-decoration: none; font-weight: 500; opacity: 0.8; transition: 0.3s; }
nav a:hover { opacity: 1; color: var(--primary); }

/* Mobile Menu Toggle (Hidden on Desktop) */
.menu-toggle { display: none; font-size: 1.5rem; cursor: pointer; background: none; border: none; color: var(--text); }

/* --- Hero Section --- */
.hero { 
    text-align: center; 
    padding: 100px 10%; 
    background: radial-gradient(circle at center, #007aff08 0%, transparent 70%); 
}

h1 { font-size: 4rem; line-height: 1.1; margin-bottom: 20px; color: #1d1d1f; letter-spacing: -0.02em; }
h1 span { color: var(--primary); }
.hero p { font-size: 1.4rem; color: #86868b; max-width: 800px; margin: 0 auto 40px; }

.cta-group { display: flex; justify-content: center; gap: 15px; flex-wrap: wrap; }

.btn { padding: 14px 32px; border-radius: 50px; text-decoration: none; font-weight: 600; transition: 0.3s; display: inline-block; }
.primary { background: var(--primary); color: white; }
.secondary { border: 1px solid var(--border); color: var(--text); }
.secondary:hover { background: #f5f5f7; }

/* --- Global Sections --- */
section { padding: 80px 10%; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-header h2 { font-size: 3rem; margin-bottom: 15px; font-weight: 800; }
.section-header p { font-size: 1.2rem; color: #86868b; max-width: 700px; margin: 0 auto; }

.dark-section { 
    background: #fbfbfd; 
    border-top: 1px solid var(--border); 
    border-bottom: 1px solid var(--border); 
}

/* --- Cards & Grid --- */
.principles-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
.card { 
    background: var(--card); 
    padding: 40px; 
    border-radius: 24px; 
    border: 1px solid transparent; 
    transition: 0.3s ease;
}
.card h3 { color: var(--primary); font-size: 1.5rem; margin-top: 0; }
.card p { color: #48484a; margin-bottom: 0; }

/* --- Manifesto Section --- */
.manifesto-container { max-width: 900px; margin: 0 auto; background: white; border: 1px solid var(--border); }
.manifesto-list { list-style: none; padding: 0; counter-reset: manifesto-counter; }
.manifesto-item { counter-increment: manifesto-counter; margin-bottom: 1.5rem; padding-left: 3.5rem; position: relative; }
.manifesto-item:last-child { margin-bottom: 0; }
.manifesto-item::before {
    content: counter(manifesto-counter);
    position: absolute;
    left: 0; top: 0;
    width: 2.2rem; height: 2.2rem;
    background: var(--primary); color: white;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 0.9rem;
}
.manifesto-item strong { display: block; color: var(--text); font-size: 1.1rem; margin-bottom: 0.2rem; }

/* --- Technical/Code Section --- */
.code-container { 
    background: var(--code-bg); 
    padding: 2rem; 
    border-radius: 16px; 
    max-width: 800px; 
    margin: 0 auto; 
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    overflow-x: auto;
}
pre { margin: 0; color: #00ff41; font-family: 'Courier New', monospace; font-size: 0.9rem; }
.rfc-link-container { text-align: center; margin-top: 25px; }
.rfc-link-container a { color: var(--primary); text-decoration: none; font-weight: 600; }

/* --- Certification Section --- */
.cert-card { text-align: center; display: flex; flex-direction: column; align-items: center; }
.cert-badge { width: 140px; height: 140px; margin-bottom: 1.5rem; transition: transform 0.3s ease; }
.cert-card:hover { transform: translateY(-10px); background: #ffffff; }

.cert-card:nth-child(1):hover { box-shadow: 0 20px 40px rgba(50, 215, 75, 0.15); border-color: #32D74B; }
.cert-card:nth-child(2):hover { box-shadow: 0 20px 40px rgba(0, 122, 255, 0.15); border-color: #007AFF; }
.cert-card:nth-child(3):hover { box-shadow: 0 20px 40px rgba(94, 92, 230, 0.15); border-color: #5E5CE6; }
.cert-card:hover .cert-badge { transform: scale(1.05); }

/* --- Footer --- */
footer { padding: 60px 10%; text-align: center; border-top: 1px solid var(--border); color: #86868b; font-size: 0.9rem; }

/* --- Responsive Media Queries --- */
@media (max-width: 768px) {
    nav { padding: 1rem 5%; }
    .menu-toggle { display: block; }
    nav ul {
        display: none; /* Hide by default on mobile */
        flex-direction: column;
        position: absolute;
        top: 100%; left: 0;
        width: 100%;
        background: white;
        padding: 1.5rem 0;
        border-bottom: 1px solid var(--border);
        text-align: center;
        gap: 1.5rem;
    }
    nav ul.active { display: flex; } /* Show when toggled */
    
    h1 { font-size: 2.8rem; }
    .hero p { font-size: 1.1rem; }
    section { padding: 60px 5%; }
    .section-header h2 { font-size: 2.2rem; }
    .card { padding: 30px; }
}