:root {
    --primary: #00d4ff;
    --secondary: #0099cc;
    --accent: #66e0ff;
    --success: #00ff88;
    --error: #ff4466;
    --warning: #ffaa00;
    --dark: #0a0a0f;
    --darker: #050508;
    --light: #ffffff;
    --gray: #6b7280;
    --bubble-1: rgba(0, 212, 255, 0.1);
    --bubble-2: rgba(102, 224, 255, 0.15);
    --bubble-3: rgba(0, 153, 204, 0.08);
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --radius: 20px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.4);
    --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
    --gradient-accent: linear-gradient(135deg, var(--accent), var(--primary));
    --bubble-gradient: radial-gradient(circle, var(--bubble-1), transparent);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--light);
    background: var(--darker);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, var(--bubble-1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, var(--bubble-2) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, var(--bubble-3) 0%, transparent 50%),
        radial-gradient(circle at 90% 70%, var(--bubble-1) 0%, transparent 50%),
        radial-gradient(circle at 10% 90%, var(--bubble-2) 0%, transparent 50%);
    z-index: -1;
    animation: bubbleFloat 20s ease-in-out infinite;
}

@keyframes bubbleFloat {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-20px) rotate(1deg); }
    66% { transform: translateY(10px) rotate(-1deg); }
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--glass);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--light);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background: var(--gradient);
    transition: width 0.3s ease;
    border-radius: 1px;
}

.nav-link:hover::after {
    width: 100%;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 300px;
    height: 300px;
    background: var(--bubble-gradient);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 4s ease-in-out infinite;
    z-index: -1;
}

@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.3; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.1; }
}

.hero-content {
    z-index: 2;
    max-width: 800px;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    text-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.8;
}

.card {
    background: var(--glass);
    backdrop-filter: blur(20px);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--glass-border);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: var(--bubble-gradient);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.card:hover::before {
    opacity: 1;
    animation: ripple 0.6s ease-out;
}

@keyframes ripple {
    0% { transform: scale(0); }
    100% { transform: scale(1); }
}

.features {
    padding: 5rem 0;
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 70% 20%, var(--bubble-3) 0%, transparent 40%),
        radial-gradient(circle at 30% 80%, var(--bubble-1) 0%, transparent 40%);
    z-index: -1;
    opacity: 0.5;
}

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

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    text-align: center;
    padding: 2rem;
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 1.5rem;
    transition: transform 0.3s ease;
}

.feature-icon:hover {
    transform: scale(1.1) rotate(5deg);
}

.documents {
    padding: 5rem 0;
}

.documents-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.doc-card {
    text-align: center;
    padding: 2rem;
    transition: transform 0.3s ease;
}

.doc-card:hover {
    transform: translateY(-10px);
}

.doc-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient);
    color: white;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 1.5rem;
}

.doc-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
}

.doc-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.doc-btn:hover::before {
    left: 100%;
}

.doc-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.4);
    background: linear-gradient(135deg, var(--accent), var(--primary));
}

.chat-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--glass);
    backdrop-filter: blur(20px);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--glass-border);
    overflow: hidden;
    position: relative;
}

.chat-container::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.chat-container:focus-within::after {
    transform: scaleX(1);
}

.chat-header {
    background: var(--gradient);
    color: white;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chat-messages {
    height: 400px;
    overflow-y: auto;
    padding: 1.5rem;
}

.message {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    animation: messageSlide 0.3s ease;
    position: relative;
}

.message::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 50%;
    width: 4px;
    height: 0;
    background: var(--gradient);
    border-radius: 2px;
    transform: translateY(-50%);
    transition: height 0.3s ease;
}

.message:hover::before {
    height: 60%;
}

@keyframes messageSlide {
    from { transform: translateX(-20px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.message-avatar {
    width: 40px;
    height: 40px;
    background: var(--gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.message-content {
    background: var(--glass);
    backdrop-filter: blur(10px);
    padding: 1rem 1.5rem;
    border-radius: var(--radius);
    max-width: 70%;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
    position: relative;
    color: var(--light);
}

.message-content p {
    color: var(--light);
    margin-bottom: 0.5rem;
}

.message-content ul, .message-content ol {
    color: var(--light);
    margin-left: 1rem;
}

.message-content li {
    color: var(--light);
    margin-bottom: 0.25rem;
}

.ai-message .message-content {
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    color: var(--light);
}

.user-message .message-content {
    background: rgba(102, 224, 255, 0.1);
    border: 1px solid rgba(102, 224, 255, 0.2);
    color: var(--light);
}

.chat-input-container {
    border-top: 1px solid var(--glass-border);
    padding: 1.5rem;
}

.document-type-selector {
    margin-bottom: 1rem;
}

.chat-input {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.3s ease;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: var(--shadow);
    border: 1px solid var(--glass-border);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(0, 212, 255, 0.3);
}

input, textarea, select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--glass);
    backdrop-filter: blur(10px);
    color: var(--light);
    position: relative;
}

select {
    background: linear-gradient(135deg, var(--glass), rgba(0, 212, 255, 0.1));
    border: 2px solid var(--glass-border);
    cursor: pointer;
    appearance: none;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="12" height="8" viewBox="0 0 12 8"><path fill="%2300d4ff" d="M6 8L0 2h12z"/></svg>');
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 3rem;
}

select option {
    background: var(--darker);
    color: var(--light);
    padding: 0.75rem;
    border: none;
    backdrop-filter: blur(10px);
}

select option:hover {
    background: rgba(0, 212, 255, 0.2);
    color: var(--primary);
}

select:hover {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(102, 224, 255, 0.1));
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.2);
}

input::placeholder, textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
    transform: translateY(-2px);
}

.send-btn {
    width: 50px;
    height: 50px;
    background: var(--gradient);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.send-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .features-grid,
    .documents-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .chat-messages {
        height: 300px;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--glass);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}