:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --dark: #0a0a0a;
    --gray-bg: #f9fafb;
    --text-main: #1f2937;
    --text-light: #6b7280;
    --white: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    background-color: var(--white);
    line-height: 1.5;
}

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

/* NAVBAR */
.navbar {
    height: 70px;
    display: flex;
    align-items: center;
    background: #000000;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.4rem;
    color: #FFFFFF;
}

.header-logo {
    height: 32px;
    width: auto;
    border-radius: 4px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #FFFFFF;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.nav-links a:hover {
    opacity: 0.7;
}

.menu-circle-btn {
    width: 36px;
    height: 36px;
    background: #1a1a1a;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.3s;
}

.menu-circle-btn:hover {
    background: #333333;
}

/* HERO */
.hero {
    padding: 100px 0;
    background: radial-gradient(circle at 90% 10%, #eff6ff 0%, white 50%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--dark);
}

.hero-text h1 span {
    color: var(--primary);
}

.hero-text p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--primary);
    color: white;
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

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

/* MOCKUP PREVIEW ENHANCEMENTS */
.hero-mockup {
    background: white;
    border-radius: 24px;
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.1);
    padding: 1.25rem;
    border: 1px solid #f0f0f0;
    max-height: 620px; /* Hauteur réduite pour un meilleur équilibre visuel */
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-container-mockup {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    overflow-y: auto;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
    padding-right: 5px;
}

.chat-container-mockup::-webkit-scrollbar {
    display: none; /* Chrome/Safari */
}

.message-row {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.message-row.user {
    align-items: flex-end;
}

.message-row.ai {
    align-items: flex-start;
}

.message-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.8rem;
    font-weight: 500;
    color: #4b5563;
}

.avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
    color: white;
}

.avatar.user {
    background: #3b82f6;
    order: 2;
}

.avatar.ai {
    background: #8b5cf6;
}

.message-bubble {
    padding: 1rem;
    border-radius: 18px;
    max-width: 90%;
    line-height: 1.5;
    font-size: 0.85rem;
}

.message-bubble.user {
    background: #3b82f6;
    color: white;
    border-bottom-right-radius: 4px;
}

.message-bubble.ai {
    background: #f9fafb;
    color: #1f2937;
    border-bottom-left-radius: 4px;
    border: 1px solid #f3f4f6;
}

.message-bubble.ai h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: #111827;
}

.message-bubble.ai h4 {
    font-size: 0.85rem;
    font-weight: 700;
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
    color: #1f2937;
}

.message-bubble.ai p {
    margin-bottom: 0.75rem;
    color: #4b5563;
}

.chat-list {
    list-style: none;
    margin-bottom: 0.75rem;
    padding-left: 0.5rem;
}

.chat-list li {
    margin-bottom: 0.3rem;
    color: #4b5563;
}

.message-time {
    font-size: 0.7rem;
    color: #9ca3af;
    margin-top: 2px;
}

.chat-controls-mockup {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid #f3f4f6;
    background: white;
}

.segmented-control {
    display: flex;
    background: #f3f4f6;
    padding: 4px;
    border-radius: 10px;
    margin-bottom: 1.5rem;
}

.segment-btn {
    flex: 1;
    text-align: center;
    padding: 8px;
    border-radius: 8px;
    font-size: 0.75rem;
    color: #6b7280;
    cursor: pointer;
    transition: all 0.2s;
}

.segment-btn.active {
    background: white;
    color: var(--text-main);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    font-weight: 700;
}

.chat-footer-mockup {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.web-toggle-container {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: #6b7280;
}

.toggle-switch {
    width: 36px;
    height: 20px;
    background: #d1d5db;
    border-radius: 20px;
    position: relative;
    cursor: pointer;
}

.toggle-switch::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    background: white;
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: all 0.2s;
}

.input-fake-wrapper {
    flex: 1;
}

.input-fake {
    width: 100%;
    background: #ffffff;
    border: 1px solid #3b82f6;
    padding: 0.8rem 1.5rem;
    border-radius: 30px;
    color: #9ca3af;
    font-size: 0.85rem;
}

/* FEATURES */
.features {
    padding: 100px 0;
    background-color: #f9fafb;
    border-top: 1px solid #f3f4f6;
    border-bottom: 1px solid #f3f4f6;
}

.section-header {
    margin-bottom: 4rem;
    text-align: left;
}

.section-tag {
    color: #2563eb;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: 1rem;
}

.section-title-alt {
    font-size: 1.8rem; /* Taille réduite de 2.2rem à 1.8rem */
    font-weight: 800;
    color: #000000;
    line-height: 1.3;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    padding: 3.5rem 2.5rem;
    border-radius: 20px;
    background: white;
    border: 1px solid #f3f4f6;
    text-align: left;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
}

.feature-card:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
    transform: translateY(-8px);
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--dark);
    line-height: 1.3;
}

.feature-card p {
    color: #6b7280;
    font-size: 0.9rem;
    line-height: 1.6;
}

.icon-box {
    width: 48px;
    height: 48px;
    background: #eff6ff;
    color: #2563eb;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    margin: 0 0 2rem 0;
    font-size: 1.4rem;
}

/* CONVERSION */
.conversion {
    background: #000000;
    color: white;
    padding: 120px 0;
    overflow: hidden;
}

.conversion-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
}

.conversion-text {
    padding-right: 4rem;
}

.conversion-text h2 {
    font-size: 2.8rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 2.5rem;
}

.check-list {
    list-style: none;
    margin: 2.5rem 0;
}

.check-list li {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 20px;
    color: #ffffff;
}

.custom-bullet {
    width: 14px;
    height: 14px;
    background: #1e3a8a; /* Bleu profond */
    border: 2px solid #3b82f6; /* Bordure bleue plus vive */
    border-radius: 50%;
    display: inline-block;
    position: relative;
    flex-shrink: 0;
}

.custom-bullet::after {
    content: '';
    position: absolute;
    width: 4px;
    height: 4px;
    background: #93c5fd; /* Point central clair */
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 6px #3b82f6;
}

.tagline {
    color: #2563eb;
    font-weight: 400; /* Passage en Normal */
    font-size: 1.1rem;
    font-style: italic;
    margin-top: 2rem;
}

.conversion-visual {
    display: flex;
    justify-content: center;
    position: relative;
}

.brain-target-wrapper {
    width: 450px;
    height: 450px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.brain-target-img {
    width: 100%;
    height: auto;
    object-fit: contain;
    /* Optionnel : légère lueur externe si l'image n'en a pas déjà assez */
    filter: drop-shadow(0 0 30px rgba(37, 99, 235, 0.1));
}

/* FOOTER */
footer {
    padding: 5rem 0;
    background: var(--dark);
    border-top: 1px solid rgba(255,255,255,0.05);
    color: var(--text-light);
    text-align: center;
}

@media (max-width: 992px) {
    .hero-grid, .conversion-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    .hero-text h1 { font-size: 3rem; }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .check-list li { justify-content: center; }
}

@media (max-width: 640px) {
    .feature-grid { grid-template-columns: 1fr; }
    .hero-text h1 { font-size: 2.5rem; }
    .container { padding: 0 1.5rem; }
}