:root {
–bg: #f8fafc;
–surface: #ffffff;
–surface2: #f1f5f9;
–accent: #0369a1;
–accent2: #7c3aed;
–accent3: #f59e0b;
–text: #1e293b;
–text-muted: #64748b;
–success: #059669;
–border: rgba(3,105,161,0.14);
–glow: rgba(3,105,161,0.10);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
background: var(–bg);
color: var(–text);
font-family: ‘Syne’, sans-serif;
min-height: 100vh;
overflow-x: hidden;
}

/* Subtle grid background */
body::before {
content: ”;
position: fixed;
inset: 0;
background-image:
linear-gradient(rgba(3,105,161,0.04) 1px, transparent 1px),
linear-gradient(90deg, rgba(3,105,161,0.04) 1px, transparent 1px);
background-size: 60px 60px;
pointer-events: none;
z-index: 0;
}

/* Glowing orbs */
.orb {
position: fixed;
border-radius: 50%;
filter: blur(120px);
opacity: 0.06;
pointer-events: none;
z-index: 0;
}
.orb-1 { width: 500px; height: 500px; background: var(–accent2); top: -100px; right: -150px; animation: float 8s ease-in-out infinite; }
.orb-2 { width: 400px; height: 400px; background: var(–accent); bottom: 100px; left: -100px; animation: float 10s ease-in-out infinite reverse; }

@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-30px); } }

/* HERO */
.hero {
position: relative;
z-index: 1;
text-align: center;
padding: 80px 24px 60px;
}
.badge {
display: inline-block;
background: rgba(0,229,255,0.1);
border: 1px solid var(–accent);
color: var(–accent);
font-family: ‘Space Mono’, monospace;
font-size: 11px;
letter-spacing: 3px;
text-transform: uppercase;
padding: 6px 16px;
border-radius: 2px;
margin-bottom: 28px;
animation: fadeDown 0.6s ease both;
}
.hero h1 {
font-size: clamp(2.4rem, 5vw, 4rem);
font-weight: 800;
line-height: 1.1;
letter-spacing: -1px;
margin-bottom: 20px;
animation: fadeDown 0.7s ease both 0.1s;
}
.hero h1 span { color: var(–accent); }
.hero p {
font-size: 1.1rem;
color: var(–text-muted);
max-width: 600px;
margin: 0 auto 40px;
line-height: 1.7;
animation: fadeDown 0.8s ease both 0.2s;
}

/* PROGRESS BAR */
.progress-container {
position: relative;
z-index: 1;
max-width: 800px;
margin: 0 auto 70px;
padding: 0 24px;
animation: fadeDown 0.9s ease both 0.3s;
}
.progress-label {
display: flex;
justify-content: space-between;
font-family: ‘Space Mono’, monospace;
font-size: 11px;
color: var(–text-muted);
margin-bottom: 10px;
letter-spacing: 1px;
}
.progress-track {
height: 4px;
background: var(–surface2);
border-radius: 2px;
overflow: hidden;
}
.progress-fill {
height: 100%;
background: linear-gradient(90deg, var(–accent), var(–accent2));
width: 0%;
border-radius: 2px;
transition: width 0.6s ease;
box-shadow: 0 0 12px var(–accent);
}

/* STEPS */
.steps-container {
position: relative;
z-index: 1;
max-width: 900px;
margin: 0 auto;
padding: 0 24px 80px;
}

.step-card {
background: var(–surface);
border: 1px solid var(–border);
border-radius: 16px;
margin-bottom: 20px;
overflow: hidden;
transition: border-color 0.3s ease, box-shadow 0.3s ease;
animation: fadeUp 0.6s ease both;
}
.step-card:nth-child(1) { animation-delay: 0.1s; }
.step-card:nth-child(2) { animation-delay: 0.2s; }
.step-card:nth-child(3) { animation-delay: 0.3s; }
.step-card:nth-child(4) { animation-delay: 0.4s; }
.step-card:nth-child(5) { animation-delay: 0.5s; }

.step-card.active {
border-color: var(–accent);
box-shadow: 0 0 30px var(–glow), inset 0 0 30px rgba(3,105,161,0.02);
}
.step-card.completed {
border-color: var(–success);
box-shadow: 0 0 20px rgba(5,150,105,0.08);
}

.step-header {
display: flex;
align-items: center;
gap: 20px;
padding: 24px 28px;
cursor: pointer;
user-select: none;
transition: background 0.2s;
}
.step-header:hover { background: rgba(255,255,255,0.02); }

.step-num {
flex-shrink: 0;
width: 48px;
height: 48px;
border-radius: 12px;
display: flex;
align-items: center;
justify-content: center;
font-family: ‘Space Mono’, monospace;
font-weight: 700;
font-size: 1rem;
background: var(–surface2);
border: 1px solid var(–border);
color: var(–text-muted);
transition: all 0.3s;
position: relative;
}
.step-card.active .step-num {
background: linear-gradient(135deg, rgba(3,105,161,0.10), rgba(124,58,237,0.10));
border-color: var(–accent);
color: var(–accent);
box-shadow: 0 0 20px rgba(3,105,161,0.12);
}
.step-card.completed .step-num {
background: rgba(5,150,105,0.08);
border-color: var(–success);
color: var(–success);
}

.step-info { flex: 1; }
.step-tag {
font-family: ‘Space Mono’, monospace;
font-size: 10px;
letter-spacing: 2px;
text-transform: uppercase;
color: var(–text-muted);
margin-bottom: 6px;
}
.step-card.active .step-tag { color: var(–accent); }
.step-card.completed .step-tag { color: var(–success); }

.step-title {
font-size: 1.05rem;
font-weight: 700;
line-height: 1.3;
}

.step-chevron {
flex-shrink: 0;
width: 32px;
height: 32px;
border-radius: 8px;
background: var(–surface2);
display: flex;
align-items: center;
justify-content: center;
transition: transform 0.3s, background 0.3s;
color: var(–text-muted);
}
.step-card.open .step-chevron { transform: rotate(180deg); background: rgba(3,105,161,0.08); color: var(–accent); }

/* STEP BODY */
.step-body {
max-height: 0;
overflow: hidden;
transition: max-height 0.5s cubic-bezier(0.4,0,0.2,1);
}
.step-card.open .step-body { max-height: 800px; }

.step-content {
padding: 0 28px 28px;
border-top: 1px solid var(–border);
padding-top: 24px;
}

.context-box {
background: rgba(3,105,161,0.04);
border: 1px solid rgba(3,105,161,0.14);
border-left: 3px solid var(–accent);
border-radius: 8px;
padding: 16px 20px;
margin-bottom: 24px;
font-size: 0.92rem;
line-height: 1.7;
color: #475569;
}
.context-box strong { color: var(–accent); }

.activities-grid {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 14px;
margin-bottom: 24px;
}
@media (max-width: 600px) { .activities-grid { grid-template-columns: 1fr; } }

.activity-card {
background: var(–surface2);
border: 1px solid var(–border);
border-radius: 10px;
padding: 18px;
display: flex;
gap: 14px;
align-items: flex-start;
transition: border-color 0.2s, transform 0.2s;
}
.activity-card:hover { border-color: rgba(0,229,255,0.3); transform: translateY(-2px); }

.activity-icon {
width: 40px;
height: 40px;
border-radius: 8px;
display: flex;
align-items: center;
justify-content: center;
font-size: 1.2rem;
flex-shrink: 0;
}
.icon-video { background: rgba(124,58,237,0.15); }
.icon-doc { background: rgba(245,158,11,0.15); }
.icon-quiz { background: rgba(16,185,129,0.15); }
.icon-lab { background: rgba(3,105,161,0.08); }

.activity-label {
font-family: ‘Space Mono’, monospace;
font-size: 10px;
letter-spacing: 1px;
text-transform: uppercase;
color: var(–text-muted);
margin-bottom: 4px;
}
.activity-desc {
font-size: 0.88rem;
line-height: 1.5;
color: var(–text);
}

/* KEY NOTIONS */
.notions-title {
font-family: ‘Space Mono’, monospace;
font-size: 10px;
letter-spacing: 2px;
text-transform: uppercase;
color: var(–text-muted);
margin-bottom: 12px;
}
.notions-wrap { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.notion-tag {
background: rgba(124,58,237,0.12);
border: 1px solid rgba(124,58,237,0.3);
color: #a78bfa;
font-size: 0.78rem;
font-family: ‘Space Mono’, monospace;
padding: 4px 12px;
border-radius: 4px;
}

/* RESOURCE LINKS */
.resource-link {
display: inline-block;
margin-top: 8px;
font-size: 0.80rem;
font-family: ‘Space Mono’, monospace;
color: var(–accent);
text-decoration: none;
border-bottom: 1px solid rgba(3,105,161,0.25);
transition: border-color 0.2s, color 0.2s;
}
.resource-link:hover { border-color: var(–accent); color: var(–accent2); }

/* COMPLETE BUTTON */
.btn-complete {
display: flex;
align-items: center;
gap: 10px;
background: none;
border: 1px solid var(–border);
color: var(–text-muted);
font-family: ‘Syne’, sans-serif;
font-size: 0.9rem;
font-weight: 600;
padding: 12px 20px;
border-radius: 8px;
cursor: pointer;
transition: all 0.2s;
width: 100%;
justify-content: center;
}
.btn-complete:hover { border-color: var(–success); color: var(–success); background: rgba(16,185,129,0.05); }
.step-card.completed .btn-complete { background: rgba(5,150,105,0.07); border-color: var(–success); color: var(–success); }

/* FINAL CARD */
.final-card {
position: relative;
z-index: 1;
max-width: 900px;
margin: 0 auto 80px;
padding: 0 24px;
}
.final-inner {
background: linear-gradient(135deg, rgba(0,229,255,0.06), rgba(124,58,237,0.06));
border: 1px solid rgba(0,229,255,0.2);
border-radius: 16px;
padding: 40px;
text-align: center;
}
.final-inner h2 { font-size: 1.6rem; font-weight: 800; margin-bottom: 12px; }
.final-inner h2 span { color: var(–accent); }
.final-inner p { color: var(–text-muted); line-height: 1.7; margin-bottom: 24px; }
.final-chips { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.chip {
background: var(–surface2);
border: 1px solid var(–border);
border-radius: 100px;
padding: 8px 18px;
font-size: 0.82rem;
font-family: ‘Space Mono’, monospace;
color: var(–text-muted);
}

/* CONNECTOR LINE */
.connector {
width: 2px;
height: 20px;
background: linear-gradient(to bottom, var(–border), transparent);
margin: 0 auto;
}

@keyframes fadeDown {
from { opacity: 0; transform: translateY(-20px); }
to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeUp {
from { opacity: 0; transform: translateY(24px); }
to { opacity: 1; transform: translateY(0); }
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(–bg); }
::-webkit-scrollbar-thumb { background: var(–surface2); border-radius: 3px; }

let completed = new Set();

function toggleStep(n) {
const card = document.getElementById(‘step-‘ + n);
const isOpen = card.classList.contains(‘open’);
// Close all
document.querySelectorAll(‘.step-card’).forEach(c => c.classList.remove(‘open’, ‘active’));
if (!isOpen) {
card.classList.add(‘open’, ‘active’);
}
}

function completeStep(n) {
const card = document.getElementById(‘step-‘ + n);
if (completed.has(n)) {
completed.delete(n);
card.classList.remove(‘completed’);
} else {
completed.add(n);
card.classList.add(‘completed’);
card.classList.remove(‘active’);
card.classList.remove(‘open’);
// Auto-open next
const next = n + 1;
if (next toggleStep(next), 300);
}
}
updateProgress();
}

function updateProgress() {
const pct = (completed.size / 5) * 100;
document.getElementById(‘progress-fill’).style.width = pct + ‘%’;
document.getElementById(‘progress-text’).textContent = completed.size + ‘ / 5 étapes complétées’;
}

// Open first step on load
window.addEventListener(‘load’, () => {
setTimeout(() => toggleStep(1), 600);
});