/* Global Styles */
:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --accent-color: #e74c3c;
    --text-color: #34495e;
    --gradient: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: url('images/image.png') no-repeat center center/cover;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Header Styles */
header {
    background-color: var(--light-color);
    padding: 0.5rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

.logo {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--dark-color);
    text-decoration: none;
    transition: all 0.3s ease;
    letter-spacing: -0.5px;
}

nav ul {
    display: flex;
    gap: 1.5rem;
    list-style: none;
}

nav ul li a {
    color: var(--dark-color);
    text-decoration: none;
    padding: 0.3rem 0.8rem;
    border-radius: 5px;
    transition: all 0.3s ease;
    font-weight: 500;
    background: rgba(0, 0, 0, 0.05);
    font-size: 0.9rem;
    letter-spacing: -0.3px;
}

nav ul li a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    background: rgba(0, 0, 0, 0.7) url('images/image.png') no-repeat center center/cover;
    background-blend-mode: overlay;
    color: white;
    padding: 8rem 2rem;
    text-align: center;
    position: relative;
    min-height: calc(100vh - 60px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
    font-weight: 700;
    letter-spacing: -1px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.2s;
    opacity: 0;
    animation-fill-mode: forwards;
    font-weight: 500;
    letter-spacing: -0.3px;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.6rem;
    background: var(--gradient);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    animation: fadeInUp 1s ease 0.4s;
    opacity: 0;
    animation-fill-mode: forwards;
    font-size: 0.9rem;
    letter-spacing: -0.3px;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

/* Content Sections */
.content {
    max-width: 1200px;
    margin: 4rem auto;
    padding: 2rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.content h2, 
.content h3,
.content h4,
.content h5,
.content h6 {
    color: var(--dark-color);
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 1rem;
    text-align: center;
}

.content h2:after,
.content h3:after,
.content h4:after,
.content h5:after,
.content h6:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--gradient);
    border-radius: 2px;
}

/* Impact Section */
.impact {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.impact .content-box {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    margin: 2rem auto;
    text-align: center;
}

.impact h2,
.impact h3 {
    text-align: center;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 1rem;
}

.impact h2:after,
.impact h3:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--gradient);
    border-radius: 2px;
}

.impact ul {
    list-style: none;
    padding: 0;
    margin: 0 auto;
    max-width: 600px;
}

.impact li {
    background: white;
    margin: 1rem auto;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    text-align: center;
    max-width: 500px;
}

.impact li:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* Course Cards */
.course-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.course {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-align: center;
}

.course h3 {
    text-align: center;
    margin-bottom: 1rem;
}

.course p {
    text-align: center;
}

.course:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--gradient);
}

.course:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

/* Lists and Expandable Content */
ul {
    list-style: none;
}

li {
    background: white;
    margin: 1rem 0;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: all 0.3s ease;
}

li:hover {
    transform: translateX(10px);
}

.expand {
    display: none;
    margin-top: 1rem;
    padding: 1rem;
    background: var(--light-color);
    border-radius: 5px;
    animation: fadeIn 0.3s ease;
}

li:hover .expand {
    display: block;
}

/* About Section */
.about {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 4rem 2rem;
}

.about-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

/* Footer */
footer {
    background: var(--dark-color);
    color: white;
    padding: 2rem;
    text-align: center;
    margin-top: 4rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        padding: 1rem;
    }

    .logo {
        margin-bottom: 1rem;
    }

    nav ul {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

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

    .hero p {
        font-size: 1.2rem;
    }

    .content {
        margin: 2rem 1rem;
        padding: 1.5rem;
    }
}

/* Contact Information Section */
.contact-info {
    text-align: center;
    max-width: 800px;
    margin: 4rem auto;
    padding: 3rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.contact-info h2 {
    color: var(--dark-color);
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 1rem;
}

.contact-info h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--gradient);
    border-radius: 2px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.contact-details p {
    margin: 0;
    font-size: 1.2rem;
}

.contact-details a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    display: inline-block;
}

.contact-details a:hover {
    color: var(--secondary-color);
    background: var(--light-color);
    transform: translateY(-2px);
}

/* Chat Interface Styles */
.chat-container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.chat-display {
    height: 400px;
    overflow-y: auto;
    padding: 1rem;
    margin-bottom: 1rem;
    border: 1px solid #eee;
    border-radius: 8px;
}

.message {
    margin-bottom: 1rem;
    padding: 0.8rem 1.2rem;
    border-radius: 8px;
    max-width: 80%;
    animation: fadeIn 0.3s ease;
}

.user-message {
    background: var(--primary-color);
    color: white;
    margin-left: auto;
}

.assistant-message {
    background: #f0f2f5;
    color: var(--dark-color);
}

.error-message {
    background: #ffebee;
    color: #c62828;
    border: 1px solid #ffcdd2;
}

.input-container {
    display: flex;
    gap: 1rem;
}

#userInput {
    flex: 1;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    transition: border-color 0.3s ease;
}

#userInput:focus {
    outline: none;
    border-color: var(--primary-color);
}

.input-container button {
    padding: 0.8rem 1.5rem;
    background: var(--gradient);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: transform 0.3s ease;
}

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

.typing-indicator {
    display: flex;
    gap: 5px;
    padding: 0.8rem 1.2rem;
    background: #f0f2f5;
    border-radius: 8px;
    width: fit-content;
    margin-bottom: 1rem;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: #666;
    border-radius: 50%;
    animation: typing 1s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}