/* Reset & Base Styles */
:root {
    --primary-color: #0f172a; /* Dark Blue */
    --secondary-color: #334155; /* Slate */
    --accent-color: #3b82f6; /* Blue */
    --accent-hover: #2563eb;
    --text-color: #1e293b;
    --light-bg: #f8fafc;
    --white: #ffffff;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
    scroll-behavior: smooth;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }

@media (max-width: 768px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.75rem; }
}

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

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--accent-color);
    color: var(--white);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-outline {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.text-gradient {
    background: linear-gradient(to right, var(--accent-color), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.bg-light { background-color: var(--light-bg); }
.bg-dark { background-color: var(--primary-color); color: var(--white); }
.text-white { color: var(--white); }

/* Header */
.header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.highlight { color: var(--accent-color); }

.nav-list {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    font-weight: 500;
    color: var(--secondary-color);
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    text-align: center;
    background: radial-gradient(circle at top right, #f1f5f9 0%, transparent 40%);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero p {
    font-size: 1.25rem;
    color: var(--secondary-color);
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Sections */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--secondary-color);
}

/* Services */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-card .icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

/* About */
.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image .image-placeholder {
    width: 100%;
    height: 400px;
    background-color: #cbd5e1;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary-color);
    font-weight: 600;
}

/* Contact */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
}

.contact-info h4 {
    color: var(--white);
    margin-bottom: 0.5rem;
}

.info-item { margin-bottom: 2rem; }
.info-item p { color: #94a3b8; }

.contact-form {
    display: grid;
    gap: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border-radius: 6px;
    border: 1px solid #334155;
    background-color: #1e293b;
    color: var(--white);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* Footer */
.footer {
    padding: 30px 0;
    text-align: center;
    background-color: #020617;
    color: #64748b;
    font-size: 0.875rem;
}

/* Chatbot Widget */
.chatbot-widget {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 9999;
    font-family: 'Inter', sans-serif;
}

.chat-toggle-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--accent-color);
    color: var(--white);
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.chat-toggle-btn:hover {
    transform: scale(1.1);
    background-color: var(--accent-hover);
}

.chat-window {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 350px;
    height: 500px;
    background-color: var(--white);
    border-radius: 16px;
    box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform-origin: bottom right;
    transform: scale(0);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
}

.chat-window.open {
    transform: scale(1);
    opacity: 1;
}

.chat-header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-title {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: #22c55e;
    border-radius: 50%;
}

.close-btn {
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
    opacity: 0.8;
}

.close-btn:hover { opacity: 1; }

.chat-messages {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
    background-color: #f8fafc;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.message {
    max-width: 85%;
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 0.9375rem;
    line-height: 1.5;
    word-wrap: break-word;
}

.bot-message {
    background-color: var(--white);
    color: var(--text-color);
    border-bottom-left-radius: 4px;
    box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
}

.user-message {
    background-color: var(--accent-color);
    color: var(--white);
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.chat-input-area {
    padding: 12px;
    background-color: var(--white);
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 8px;
}

.chat-input-area input {
    flex: 1;
    padding: 10px 14px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background-color: #f1f5f9;
    font-family: inherit;
    font-size: 0.9375rem;
}

.chat-input-area input:focus {
    outline: none;
    border-color: var(--accent-color);
    background-color: var(--white);
}

.chat-input-area button {
    background-color: var(--accent-color);
    color: var(--white);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.chat-input-area button:hover {
    background-color: var(--accent-hover);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .header-container { padding: 0 16px; }
    .nav { display: none; } /* Simplified for this demo */
    .mobile-menu-btn { display: block; }
    
    .hero { padding-top: 120px; }
    .about-container, .contact-wrapper { grid-template-columns: 1fr; }
    
    .chat-window {
        width: calc(100vw - 40px);
        bottom: 100px;
        right: 20px;
        left: 20px;
    }
    
    .chatbot-widget {
        bottom: 20px;
        right: 20px;
    }
}