:root {
    --bg-color: #14101f;
    --accent-color: #a855f7;
    --accent-rgb: 168, 85, 247;
    --accent-light: #c084fc;
    --text-main: #ffffff;
    --text-dim: #b4aac6;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    text-align: center;
    padding: 4rem 2rem 3rem 2rem;
    z-index: 1;
}

.logo-echo {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -2px;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff 0%, var(--accent-light) 45%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tagline {
    font-size: 1.2rem;
    color: var(--text-dim);
    max-width: 500px;
    margin: 0 auto 2rem auto;
    line-height: 1.6;
}

.status-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    background: rgba(var(--accent-rgb), 0.14);
    border: 1px solid rgba(var(--accent-rgb), 0.4);
    color: var(--accent-light);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 2rem;
}

.btn {
    text-decoration: none;
    color: var(--bg-color);
    background-color: var(--text-main);
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    transition: transform 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

/* Nos outils */
.tools {
    z-index: 1;
    width: 100%;
    max-width: 1000px;
    padding: 0 2rem 4rem 2rem;
    box-sizing: border-box;
}

.tools-title {
    text-align: center;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 2rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1rem;
}

.card {
    display: block;
    text-decoration: none;
    text-align: left;
    padding: 1.5rem;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.11);
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.card:hover {
    transform: translateY(-4px);
    border-color: rgba(var(--accent-rgb), 0.7);
    background: rgba(var(--accent-rgb), 0.12);
}

.card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.card-icon {
    font-size: 1.5rem;
    line-height: 1;
}

.card-tag {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--accent-light);
    background: rgba(var(--accent-rgb), 0.12);
    border: 1px solid rgba(var(--accent-rgb), 0.3);
    border-radius: 20px;
    padding: 0.2rem 0.6rem;
    white-space: nowrap;
}

.card-name {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.35rem;
}

.card-desc {
    font-size: 0.9rem;
    color: var(--text-dim);
    line-height: 1.5;
    margin: 0;
}

/* Effet d'écho en arrière-plan */
.echo-bg {
    position: fixed;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 0;
    opacity: 0.12;
    pointer-events: none;
}

.circle {
    position: absolute;
    border: 2px solid var(--accent-color);
    border-radius: 50%;
    animation: ripple 6s infinite ease-out;
}

@keyframes ripple {
    0% { width: 0; height: 0; opacity: 0.5; }
    100% { width: 800px; height: 800px; opacity: 0; }
}