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

:root {
    --primary-color: #007bff;
    --secondary-color: #28a745;
    --accent-color: #ffc107;
    --danger-color: #dc3545;
    --text-dark: #333;
    --text-light: #666;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-lg: 0 5px 20px rgba(0,0,0,0.15);
}

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

/* Header Styles */
.landing-header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-color);
}

.logo-img {
    height: 50px;
    width: auto;
    object-fit: contain;
}

.tagline {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-left: 10px;
}

.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}

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

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

.header-buttons {
    display: flex;
    gap: 15px;
    align-items: center;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    font-size: 0.95rem;
}

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

.btn-primary:hover {
    background: #0056b3;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-chat-header {
    background: var(--accent-color);
    color: var(--text-dark);
    padding: 10px 15px;
}

.btn-chat-header:hover {
    background: #e0a800;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 100px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,154.7C960,171,1056,181,1152,165.3C1248,149,1344,107,1392,85.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
    opacity: 0.3;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 40px;
    opacity: 0.95;
    animation: fadeInUp 1s ease;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1.2s ease;
}

.btn-hero {
    padding: 15px 35px;
    font-size: 1.1rem;
    border-radius: 50px;
}

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

.btn-hero-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.btn-hero-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

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

/* Section Styles */
.section {
    padding: 80px 20px;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 60px;
}

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

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.feature-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.feature-description {
    color: var(--text-light);
    line-height: 1.8;
}

/* How It Works */
.how-it-works {
    background: var(--bg-light);
}

.steps-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
    margin-top: 50px;
}

.step {
    flex: 1;
    min-width: 200px;
    text-align: center;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.step-description {
    color: var(--text-light);
}

.step-arrow {
    position: absolute;
    top: 30px;
    right: -15px;
    font-size: 2rem;
    color: var(--primary-color);
}

/* Benefits Section */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.benefit-card {
    background: var(--white);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
}

.benefit-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.benefit-label {
    font-size: 1.1rem;
    color: var(--text-light);
}

/* Footer */
.footer {
    background: #2c3e50;
    color: var(--white);
    padding: 50px 20px 20px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h3 {
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.7);
}

/* Floating Chat Button - link to Support Chat page (SignalR) */
.floating-chat-button {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
    animation: pulse 2s infinite;
    text-decoration: none;
    color: inherit;
    display: inline-block;
}

.chat-btn {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: var(--accent-color);
    border: none;
    color: var(--text-dark);
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.chat-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}

.chat-label {
    font-size: 0.7rem;
    font-weight: 600;
    margin-top: 2px;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    animation: fadeIn 0.3s;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--white);
    border-radius: 10px;
    padding: 40px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s;
    position: relative;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.modal-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-dark);
}

.close-btn {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-light);
    transition: color 0.3s;
}

.close-btn:hover {
    color: var(--text-dark);
}

.form-group {
    margin-bottom: 25px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-dark);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

.form-control.is-invalid {
    border-color: var(--danger-color);
}

.invalid-feedback {
    color: var(--danger-color);
    font-size: 0.9rem;
    margin-top: 5px;
    display: none;
}

.form-control.is-invalid + .invalid-feedback {
    display: block;
}

.modal-buttons {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.modal-buttons .btn {
    flex: 1;
}

/* Chat Interface */
.chat-interface {
    display: none;
}

.chat-interface.active {
    display: block;
}

.chat-container {
    height: 400px;
    overflow-y: auto;
    border: 1px solid #e0e0e0;
    border-radius: 5px;
    padding: 20px;
    margin-bottom: 20px;
    background: var(--bg-light);
}

.chat-message {
    margin-bottom: 15px;
    padding: 10px 15px;
    border-radius: 10px;
    max-width: 80%;
}

.chat-message.sent {
    background: var(--primary-color);
    color: var(--white);
    margin-left: auto;
    text-align: right;
}

.chat-message.received {
    background: var(--white);
    color: var(--text-dark);
    border: 1px solid #e0e0e0;
}

.chat-input-group {
    display: flex;
    gap: 10px;
}

.chat-input {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 25px;
    font-size: 1rem;
}

.chat-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

.chat-send-btn {
    padding: 12px 25px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
}

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Extra Small Devices (phones, less than 576px) */
@media (max-width: 575.98px) {
    .header-container {
        flex-wrap: wrap;
        padding: 10px 15px;
    }

    .logo-img {
        height: 40px;
    }

    .tagline {
        font-size: 0.75rem;
        margin-left: 5px;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 15px;
        box-shadow: var(--shadow);
        display: none;
        margin-top: 10px;
        border-radius: 5px;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        width: 100%;
        margin-bottom: 10px;
    }

    .nav-links a {
        padding: 12px;
        display: block;
    }

    .header-buttons {
        flex-direction: column;
        gap: 10px;
        width: 100%;
        margin-top: 10px;
    }

    .header-buttons .btn {
        width: 100%;
        text-align: center;
    }

    .hero-section {
        padding: 60px 15px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
        padding: 0 10px;
    }

    .section {
        padding: 50px 15px;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .feature-card {
        padding: 30px 20px;
    }

    .steps-container {
        flex-direction: column;
        gap: 20px;
    }

    .step-arrow {
        display: none;
    }

    .benefits-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .floating-chat-button {
        bottom: 15px;
        right: 15px;
    }

    .chat-btn {
        width: 55px;
        height: 55px;
        font-size: 1.1rem;
    }

    .chat-label {
        font-size: 0.6rem;
    }

    .modal-content {
        padding: 25px 20px;
        margin: 10px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* Small Devices (landscape phones, 576px and up) */
@media (min-width: 576px) and (max-width: 767.98px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .steps-container {
        flex-direction: column;
    }

    .step-arrow {
        display: none;
    }

    .header-buttons {
        gap: 10px;
    }

    .btn {
        padding: 8px 15px;
        font-size: 0.85rem;
    }
}

/* Medium Devices (tablets, 768px and up) */
@media (min-width: 768px) and (max-width: 991.98px) {
    .hero-title {
        font-size: 3rem;
    }

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

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .steps-container {
        flex-wrap: wrap;
        justify-content: center;
    }

    .step {
        min-width: 150px;
    }

    .step-arrow {
        display: none;
    }
}

/* Large Devices (desktops, 992px and up) */
@media (min-width: 992px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .benefits-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dark);
    padding: 5px;
}

@media (max-width: 767.98px) {
    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        display: none;
    }

    .nav-links.active {
        display: flex;
    }
}

/* Landscape Orientation */
@media (orientation: landscape) and (max-height: 500px) {
    .hero-section {
        padding: 40px 20px;
    }

    .hero-title {
        font-size: 2rem;
        margin-bottom: 10px;
    }

    .hero-subtitle {
        font-size: 0.9rem;
        margin-bottom: 20px;
    }

    .section {
        padding: 40px 20px;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .nav-links a,
    .chat-btn {
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
}