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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

/* ===== Color Variables ===== */
:root {
    --primary-blue: #2563eb;
    --dark-blue: #1d4ed8;
    --light-blue: #3b82f6;
    --blue-hover: #1e40af;
    --grey-light: #f8fafc;
    --grey-medium: #64748b;
    --grey-dark: #334155;
    --white: #ffffff;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
    line-height: 1.6;
}

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

.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; }
.mb-5 { margin-bottom: 3rem; }

.py-1 { padding: 0.5rem 0; }
.py-2 { padding: 1rem 0; }
.py-3 { padding: 1.5rem 0; }
.py-4 { padding: 2rem 0; }
.py-5 { padding: 3rem 0; }

/* ===== Header & Navigation ===== */
header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary-blue);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--grey-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: width 0.3s ease;
}

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

/* Mobile Menu Toggle */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--grey-dark);
    margin: 3px 0;
    transition: 0.3s;
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, var(--primary-blue), var(--dark-blue));
    color: var(--white);
    padding: 150px 0 100px;
    text-align: center;
    background-image: url('../images/hero-banner.jpg');
    background-size: cover;
    background-position: center;
    background-blend-mode: overlay;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(37, 99, 235, 0.8);
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border: none;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: var(--blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
}

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

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

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

.btn-white:hover {
    background: var(--grey-light);
    transform: translateY(-2px);
}

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

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

.section-title h2 {
    color: var(--grey-dark);
    margin-bottom: 1rem;
}

.section-title p {
    color: var(--grey-medium);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Services Grid ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: var(--white);
}

/* ===== Stats Section ===== */
.stats {
    background: var(--grey-light);
}

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

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--grey-medium);
    font-weight: 500;
}

/* ===== Testimonials ===== */
.testimonials {
    background: var(--white);
}

.testimonial-slider {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.testimonial-card {
    background: var(--grey-light);
    padding: 2rem;
    border-radius: 10px;
    position: relative;
}

.testimonial-quote {
    font-style: italic;
    margin-bottom: 1.5rem;
    color: var(--grey-dark);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 600;
}

.author-info h5 {
    margin-bottom: 0.25rem;
    color: var(--grey-dark);
}

.author-info p {
    color: var(--grey-medium);
    margin: 0;
    font-size: 0.9rem;
}

/* ===== Contact Form ===== */
.contact-section {
    background: var(--grey-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h3 {
    color: var(--primary-blue);
    margin-bottom: 1.5rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.contact-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.form-group {
    margin-bottom: 1.5rem;
}

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

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    background: var(--white);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-blue);
}

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

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.checkbox-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
}

/* ===== Footer ===== */
footer {
    background: var(--grey-dark);
    color: var(--white);
    padding: 3rem 0 1rem;
}

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

.footer-section h4 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

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

.social-link {
    width: 40px;
    height: 40px;
    background: var(--primary-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-decoration: none;
    transition: background-color 0.3s ease;
}

.social-link:hover {
    background: var(--light-blue);
}

.footer-bottom {
    border-top: 1px solid #475569;
    padding-top: 1rem;
    text-align: center;
    color: #cbd5e1;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 2rem;
        transition: left 0.3s ease;
        box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.75rem; }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 120px 0 80px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .testimonial-slider {
        grid-template-columns: 1fr;
    }
}

/* ===== Animation Classes ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.bounce-in {
    animation: bounceIn 0.6s ease;
}

@keyframes bounceIn {
    0% { transform: scale(0.3); opacity: 0; }
    50% { transform: scale(1.05); }
    70% { transform: scale(0.9); }
    100% { transform: scale(1); opacity: 1; }
}

/* ===== Loading Spinner ===== */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}