:root {
    --primary-color: #0066ff;
    --secondary-color: #001233;
    --background-dark: #0a0b1a;
    --text-color: #ffffff;
    --text-secondary: #8b8b8b;
    --accent-gradient: linear-gradient(135deg, #0066ff, #2c46c9);
    --card-bg: rgba(255, 255, 255, 0.05);
    --border-color: rgba(255, 255, 255, 0.1);
    --chat-bg: rgba(255, 255, 255, 0.02);
    --user-message-bg: rgba(0, 102, 255, 0.1);
    --ai-message-bg: rgba(255, 255, 255, 0.05);
    --border-radius: 8px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background-dark);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background: rgba(10, 11, 26, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    font-size: 1.5rem;
}

.logo img {
    height: 40px;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.cta-button {
    background: var(--accent-gradient);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s;
}

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

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at top right, rgba(0, 102, 255, 0.1), transparent);
    pointer-events: none;
}

body.light-mode .hero::before {
    background: radial-gradient(circle at top right, rgba(0, 102, 255, 0.05), transparent);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    border: none;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

/* Services & Features */
.services, .features-grid {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--text-color);
    margin-bottom: 20px;
}

.cards-grid, .features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    padding: 20px 0;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 30px;
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-color);
}

.card p {
    color: var(--text-secondary);
}

/* AYA Chat Section */
.aya-chat {
    background: var(--chat-bg);
    border-radius: 16px;
    padding: 30px;
    margin-top: 50px;
    border: 1px solid var(--border-color);
}

#chat-history {
    height: 400px;
    overflow-y: auto;
    padding: 20px;
    margin-bottom: 20px;
}

.message {
    margin-bottom: 20px;
    padding: 15px;
    border-radius: 12px;
    max-width: 80%;
    word-wrap: break-word;
}

.user-message {
    background: var(--user-message-bg);
    margin-left: auto;
    border: 1px solid rgba(0, 102, 255, 0.2);
}

body.light-mode .user-message {
    border: 1px solid var(--border-color);
}

.ai-message {
    background: var(--ai-message-bg);
    margin-right: auto;
    border: 1px solid var(--border-color);
}

.input-container {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

input[type="text"] {
    flex: 1;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-color);
    font-size: 16px;
}

body.light-mode input[type="text"] {
    background: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
}

body.light-mode input[type="text"]:focus {
    border-color: var(--primary-color);
}

button {
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 15px 30px;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: transform 0.3s;
}

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

.typing-indicator {
    color: var(--text-secondary);
    font-style: italic;
    margin: 10px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.typing-indicator::after {
    content: "...";
    animation: typing 1.5s infinite;
}

@keyframes typing {
    0% { content: "."; }
    33% { content: ".."; }
    66% { content: "..."; }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

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

    .hero-buttons {
        flex-direction: column;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(10, 11, 26, 0.98);
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
    }

    .nav-links.active {
        max-height: 300px;
        border-top: 1px solid var(--border-color);
    }

    .nav-links a {
        padding: 10px 0;
        width: 100%;
        text-align: center;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .message {
        max-width: 90%;
    }

    input[type="text"] {
        font-size: 14px;
    }

    button {
        padding: 12px 20px;
        font-size: 14px;
    }
}

/* Mobil menü gomb */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.8rem;
    cursor: pointer;
}

/* Téma váltó gomb */
.theme-toggle-button {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 5px;
    margin-left: 15px;
}

body.light-mode .theme-toggle-button {
    color: var(--text-color);
}