/* 
 * SuperIntel Innovation - Main Stylesheet
 * Optimized for performance and accessibility
 */

/* CSS Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS Custom Properties for consistent theming */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --text-primary: #2d3748;
    --text-secondary: #666;
    --text-light: #888;
    --background-white: #ffffff;
    --background-light: #f8f9fa;
    --background-accent: #f8f9ff;
    --border-light: #e2e8f0;
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-medium: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 20px 50px rgba(0, 0, 0, 0.15);
    --border-radius-sm: 10px;
    --border-radius-md: 15px;
    --border-radius-lg: 20px;
    --border-radius-xl: 25px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.6s ease;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --max-width: 1200px;
    --header-height: 80px;
}

/* Base Typography */
body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    overflow-x: hidden;
    background: var(--primary-gradient);
    min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

p {
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    transition: var(--transition-normal);
}

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

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: var(--transition-normal);
    height: var(--header-height);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 2rem;
    height: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

    .logo i {
        background: var(--primary-gradient);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        font-size: 1.8rem;
    }

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
}

    .nav-links li a {
        color: var(--text-primary);
        font-weight: 500;
        transition: var(--transition-normal);
        position: relative;
        padding: 0.5rem 0;
    }

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

            .nav-links li a.active::after {
                content: '';
                position: absolute;
                bottom: -5px;
                left: 0;
                width: 100%;
                height: 2px;
                background: var(--primary-gradient);
            }

.member-login {
    background: var(--primary-gradient);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-xl);
    font-weight: 500;
    transition: var(--transition-normal);
}

    .member-login:hover {
        transform: translateY(-2px);
        box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
    }

/* Mobile Navigation */
.mobile-menu {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
}

    .mobile-menu span {
        width: 25px;
        height: 3px;
        background: var(--text-primary);
        margin: 3px 0;
        transition: var(--transition-normal);
        border-radius: 2px;
    }

    .mobile-menu.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

    .mobile-menu.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }

/* Main Content */
main {
    padding-top: var(--header-height);
}

/* Hero Section */
.hero {
    background: var(--primary-gradient);
    color: white;
    padding: 70px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

    .hero::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 1000 1000"><polygon fill="%23ffffff08" points="0,1000 1000,200 1000,1000"/></svg>');
        pointer-events: none;
    }

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.3s forwards;
}

.hero .tagline {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.6s forwards;
    font-weight: 300;
}

.hero .description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0;
    animation: fadeInUp 1s ease 0.9s forwards;
}

.cta-button {
    display: inline-block;
    background: white;
    color: var(--primary-color);
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: bold;
    font-size: 1.1rem;
    transition: var(--transition-normal);
    opacity: 0;
    animation: fadeInUp 1s ease 1.2s forwards;
    border: 2px solid transparent;
}

    .cta-button:hover {
        transform: translateY(-3px);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        border-color: rgba(255, 255, 255, 0.2);
    }

/* Stats Section */
.stats {
    background: white;
    padding: 4rem 0;
    margin-top: -2rem;
    position: relative;
    z-index: 2;
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

.stats-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.stat-item {
    text-align: center;
    background: var(--background-accent);
    padding: 2rem;
    border-radius: var(--border-radius-md);
    transition: var(--transition-normal);
    border: 1px solid var(--border-light);
}

    .stat-item:hover {
        transform: translateY(-5px);
        box-shadow: var(--shadow-medium);
    }

.stat-number {
    font-size: 3rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    line-height: 1;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Services Section */
.services {
    background: var(--background-light);
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

    .section-header h2 {
        font-size: 2.5rem;
        color: var(--text-primary);
        margin-bottom: 1rem;
    }

    .section-header p {
        font-size: 1.1rem;
        color: var(--text-secondary);
        margin-bottom: 0;
    }

.services-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.service-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-medium);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-light);
}

    .service-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: var(--primary-gradient);
    }

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

.service-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.learn-more {
    color: var(--primary-color);
    font-weight: bold;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-normal);
}

    .learn-more:hover {
        gap: 1rem;
        color: var(--secondary-color);
    }

/* Why Choose Us Section */
.why-choose {
    padding: 6rem 0;
    background: white;
}

.features-grid {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-item {
    text-align: center;
    padding: 2rem;
    transition: var(--transition-normal);
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 1rem;
    transition: var(--transition-normal);
}

.feature-item:hover .feature-icon {
    transform: scale(1.1);
}

.feature-item h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.feature-item p {
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* Footer */
.footer {
    background: #2c3e50;
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
    font-size: 1.2rem;
}

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

    .footer-section ul li {
        margin-bottom: 0.5rem;
    }

.footer-section a {
    color: #bbb;
    transition: var(--transition-normal);
}

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

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

    .social-links a {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 50%;
        color: #bbb;
        transition: var(--transition-normal);
    }

        .social-links a:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-2px);
        }

.address {
    margin-top: 1.5rem;
}

    .address h4 {
        margin-bottom: 0.5rem;
        color: var(--primary-color);
        font-size: 1rem;
    }

    .address p {
        color: #bbb;
        font-size: 0.9rem;
        line-height: 1.4;
        margin-bottom: 0;
    }

.footer-bottom {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #34495e;
    color: #bbb;
}

    .footer-bottom a {
        color: var(--primary-color);
    }

        .footer-bottom a:hover {
            color: white;
        }

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-1 {
    margin-bottom: 0.5rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.mb-3 {
    margin-bottom: 1.5rem;
}

.mb-4 {
    margin-bottom: 2rem;
}

.mt-1 {
    margin-top: 0.5rem;
}

.mt-2 {
    margin-top: 1rem;
}

.mt-3 {
    margin-top: 1.5rem;
}

.mt-4 {
    margin-top: 2rem;
}

.p-1 {
    padding: 0.5rem;
}

.p-2 {
    padding: 1rem;
}

.p-3 {
    padding: 1.5rem;
}

.p-4 {
    padding: 2rem;
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: var(--border-radius-xl);
    font-weight: 500;
    text-align: center;
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
    font-family: inherit;
    font-size: 1rem;
}

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

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
    }

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

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

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

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

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

    .form-group label {
        display: block;
        margin-bottom: 0.5rem;
        font-weight: 500;
        color: var(--text-primary);
    }

.form-control {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition-normal);
    background: white;
}

    .form-control:focus {
        outline: none;
        border-color: var(--primary-color);
        box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    }

    .form-control::placeholder {
        color: var(--text-light);
    }

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

/* Card Styles */
.card {
    background: white;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-medium);
    overflow: hidden;
    transition: var(--transition-normal);
    border: 1px solid var(--border-light);
}

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

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-light);
    background: var(--background-accent);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-light);
    background: var(--background-light);
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

    .loading::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 20px;
        height: 20px;
        margin: -10px 0 0 -10px;
        border: 2px solid var(--border-light);
        border-top-color: var(--primary-color);
        border-radius: 50%;
        animation: spin 1s linear infinite;
    }

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.nav-links a:focus,
.member-login:focus,
.btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    * {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
    }

    header, .mobile-menu, .footer {
        display: none;
    }

    main {
        padding-top: 0;
    }

    .hero {
        padding: 2rem 0;
    }

    .cta-button, .learn-more {
        display: none;
    }
}