/* Reset & Variables */
:root {
    --primary-color: #0f172a; /* Slate 900 - Professional Deep Blue */
    --secondary-color: #1e293b; /* Slate 800 */
    --accent-color: #0284c7; /* Sky 600 - Trustworthy Blue */
    --text-color: #475569; /* Slate 600 - Readable Text */
    --heading-color: #0f172a; /* Slate 900 */
    --light-gray: #f8fafc; /* Slate 50 - Clean Background */
    --dark-gray: #0f172a; /* Slate 900 - Footer */
    --white: #ffffff;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --box-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

h1, h2, h3, h4, h5, h6 {
    color: var(--heading-color);
    font-weight: 700;
    line-height: 1.2;
}

/* Layout Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.25rem;
    color: var(--primary-color);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--accent-color);
    margin: 12px auto 0;
    border-radius: 2px;
}

.section-title p {
    color: #64748b;
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Header & Navigation */
header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

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

.logo img {
    height: 48px;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-links a {
    font-weight: 600;
    color: var(--heading-color);
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: var(--transition);
}

.nav-links a:hover::after, .nav-links a.active::after {
    width: 100%;
}

.hamburger {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--heading-color);
}

/* Carousel */
.carousel {
    position: relative;
    height: 600px;
    overflow: hidden;
    background: #000;
}

.carousel-inner {
    height: 100%;
    position: relative;
}

.carousel-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-item.active {
    opacity: 1;
    z-index: 1;
}

.carousel-item img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.5;
    filter: saturate(1.1);
}

.carousel-caption {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 900px;
    padding: 20px;
    animation: fadeInUp 1s ease-out;
}

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

.carousel-caption h2 {
    font-size: 3.5rem;
    margin-bottom: 24px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    color: var(--white);
}

.carousel-caption p {
    font-size: 1.25rem;
    margin-bottom: 40px;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
    color: rgba(255, 255, 255, 0.9);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    background: var(--accent-color);
    color: var(--white);
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    background: #0369a1; /* Darker Sky */
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.carousel-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 2;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: var(--transition);
}

.indicator.active {
    background: var(--white);
    transform: scale(1.2);
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.service-card {
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border: 1px solid #e2e8f0;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--box-shadow-hover);
    border-color: var(--accent-color);
}

.service-img {
    height: 240px;
    overflow: hidden;
}

.service-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.service-card:hover .service-img img {
    transform: scale(1.1);
}

.service-content {
    padding: 32px;
    text-align: center;
}

.service-content h3 {
    margin-bottom: 16px;
    color: var(--heading-color);
    font-size: 1.5rem;
}

.service-content p {
    color: var(--text-color);
}

/* Contact Form */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    background: var(--white);
    padding: 48px;
    border-radius: 16px;
    box-shadow: var(--box-shadow);
    border: 1px solid #e2e8f0;
}

.contact-info h3 {
    margin-bottom: 24px;
    color: var(--primary-color);
    font-size: 1.75rem;
}

.info-item {
    margin-bottom: 32px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.info-item div:first-child {
    width: 48px;
    height: 48px;
    background: #e0f2fe; /* Light Sky */
    color: var(--accent-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.form-group {
    margin-bottom: 24px;
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #e2e8f0;
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    color: var(--heading-color);
    background: #f8fafc;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.1);
}

textarea.form-control {
    resize: vertical;
    min-height: 140px;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    background: #94a3b8;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Footer */
footer {
    background: var(--dark-gray);
    color: #cbd5e1; /* Slate 300 */
    padding: 80px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

.footer-col h4 {
    margin-bottom: 24px;
    color: var(--white);
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--white);
    padding-left: 6px;
}

.copyright {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.875rem;
    color: #64748b;
}

/* About Page Specific */
.about-hero {
    background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.8)), url('../images/about.jpg') no-repeat center center/cover;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-align: center;
}

.about-hero h1 {
    font-size: 3rem;
    color: var(--white);
}

/* Responsive Media Queries */
@media (max-width: 992px) {
    .hamburger {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: 80px;
        right: -100%;
        width: 100%;
        max-width: 300px;
        height: calc(100vh - 80px);
        background: var(--white);
        flex-direction: column;
        padding: 40px;
        box-shadow: -4px 0 20px rgba(0,0,0,0.1);
        transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        align-items: flex-start;
    }

    .nav-links.active {
        right: 0;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .carousel-caption h2 {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .services-grid {
        grid-template-columns: 1fr;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        padding: 32px;
        gap: 40px;
    }

    .carousel-caption h2 {
        font-size: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .section-title h2 {
        font-size: 1.75rem;
    }
}

/* FAQ Details Enhancement */
details {
    background: var(--white);
    border: 1px solid #e2e8f0;
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 16px;
    transition: var(--transition);
}

details:hover {
    border-color: var(--accent-color);
    box-shadow: var(--box-shadow);
}

summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--heading-color);
    list-style: none;
    position: relative;
    padding-right: 24px;
}

summary::-webkit-details-marker {
    display: none;
}

summary::after {
    content: '+';
    position: absolute;
    right: 0;
    font-size: 1.5rem;
    line-height: 1;
    color: var(--accent-color);
}

details[open] summary::after {
    content: '-';
}

details[open] summary {
    margin-bottom: 16px;
    color: var(--accent-color);
}