/* ==================== RESET & BASE STYLES ==================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Open Sans', sans-serif;
    color: var(--gray-700);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    color: var(--gray-800);
    line-height: 1.2;
}

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

ul {
    list-style: none;
}

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

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

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(86, 204, 242, 0.4);
}

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

.btn-outline:hover {
    background: var(--white);
    color: var(--primary-darker);
    transform: translateY(-2px);
}

.btn-outline-dark {
    background: transparent;
    color: var(--primary-darker);
    border-color: var(--primary-darker);
}

.btn-outline-dark:hover {
    background: var(--primary-darker);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-small {
    padding: 10px 24px;
    font-size: 0.85rem;
    background: var(--white);
    color: var(--primary-darker);
    border-radius: 50px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
}

.btn-small:hover {
    background: var(--primary-lightest);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* ==================== SECTION HEADERS ==================== */
.section-header {
    text-align: center;
    max-width: 650px;
    margin: 0 auto 60px;
}

.section-tag {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--primary-darker);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    color: var(--gray-800);
    margin-bottom: 16px;
}

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

.section-description {
    font-size: 1.05rem;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ==================== SCROLL ANIMATIONS ==================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ==================== PAGE HERO (used on sub-pages) ==================== */
.page-hero {
    background: linear-gradient(135deg, rgba(86, 204, 242, 0.12) 0%, rgba(56, 189, 248, 0.08) 100%);
    padding: 140px 0 80px;
    text-align: center;
    border-bottom: 1px solid var(--gray-100);
}

.page-hero .section-tag {
    margin-bottom: 12px;
}

.page-hero .section-title {
    margin-bottom: 16px;
}

.page-hero .section-description {
    max-width: 600px;
    margin: 0 auto;
}

/* ==================== BACK TO TOP BUTTON ==================== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 900;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-darker);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ==================== STICKY MOBILE CTA ==================== */
.mobile-cta {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 800;
    background: var(--white);
    padding: 12px 20px;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    border-top: 1px solid var(--gray-100);
}

.mobile-cta-inner {
    display: flex;
    gap: 10px;
    max-width: 600px;
    margin: 0 auto;
}

.mobile-cta .btn-cta-call {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 16px;
    background: var(--white);
    color: var(--primary-darker);
    border: 2px solid var(--primary);
    border-radius: 50px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 0.85rem;
    text-decoration: none;
    transition: var(--transition);
}

.mobile-cta .btn-cta-quote {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 16px;
    background: var(--primary);
    color: var(--white);
    border: 2px solid var(--primary);
    border-radius: 50px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 0.85rem;
    text-decoration: none;
    transition: var(--transition);
}

.mobile-cta .btn-cta-quote:hover {
    background: var(--primary-darker);
    border-color: var(--primary-darker);
}

/* ==================== FAQ ACCORDION ==================== */
.faq {
    padding: 100px 0;
    background: var(--primary-bg);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-100);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--primary-light);
}

.faq-item.active {
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--gray-800);
    gap: 16px;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--primary-darker);
}

.faq-question i {
    font-size: 0.8rem;
    color: var(--primary);
    transition: transform 0.3s ease;
    min-width: 16px;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq-answer-inner {
    padding: 0 24px 20px;
    font-size: 0.9rem;
    color: var(--gray-500);
    line-height: 1.7;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

/* ==================== LIGHTBOX ==================== */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.92);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    padding: 40px;
}

.lightbox-overlay.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-content {
    background: var(--white);
    border-radius: var(--radius-xl);
    max-width: 800px;
    width: 100%;
    overflow: hidden;
    transform: scale(0.9) translateY(20px);
    transition: transform 0.3s ease;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

.lightbox-overlay.active .lightbox-content {
    transform: scale(1) translateY(0);
}

.lightbox-gallery {
    position: relative;
    background: #111;
}

.lightbox-gallery-main {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    max-height: 420px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.gallery-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.3s ease;
    filter: saturate(0.85) contrast(1.05) brightness(1.02);
}

.gallery-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 42px;
    height: 42px;
    background: rgba(0, 0, 0, 0.5);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    z-index: 2;
    transition: background 0.2s ease;
}

.gallery-nav:hover {
    background: rgba(0, 0, 0, 0.75);
}

.gallery-prev { left: 12px; }
.gallery-next { right: 12px; }

.gallery-thumbnails {
    display: none;
}

.gallery-thumb {
    width: 52px;
    height: 38px;
    object-fit: cover;
    border-radius: 6px;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.2s ease, outline 0.2s ease;
    flex-shrink: 0;
    filter: saturate(0.85) contrast(1.05) brightness(1.02);
}

.gallery-thumb:hover {
    opacity: 0.8;
}

.gallery-thumb.active {
    opacity: 1;
    outline: 2px solid var(--white);
    outline-offset: 1px;
}

.gallery-counter {
    display: none;
}

.lightbox-body {
    padding: 32px;
}

.lightbox-body .project-category {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 0.75rem;
    color: var(--primary-darker);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.lightbox-body h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 10px 0 14px;
    color: var(--gray-800);
}

.lightbox-body p {
    font-size: 0.95rem;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 20px;
}

.lightbox-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.lightbox-detail {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--gray-600);
}

.lightbox-detail i {
    color: var(--primary);
    font-size: 0.9rem;
    min-width: 18px;
}

.lightbox-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.4);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: var(--transition);
    z-index: 10;
}

.lightbox-close:hover {
    background: rgba(0, 0, 0, 0.7);
}

/* ==================== CLIENT LOGOS ==================== */
.clients {
    padding: 60px 0;
    background: var(--white);
    border-top: 1px solid var(--gray-100);
    border-bottom: 1px solid var(--gray-100);
}

.clients-label {
    text-align: center;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 0.8rem;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 32px;
}

.clients-logos {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.client-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    color: var(--gray-400);
    transition: var(--transition);
    user-select: none;
    text-align: center;
    min-width: 120px;
}

.client-logo:hover {
    color: var(--primary);
}

.client-logo i {
    font-size: 2rem;
    margin-bottom: 4px;
}

.client-logo .logo-text {
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

.client-logo .logo-desc {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--gray-400);
    letter-spacing: 0;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .mobile-cta {
        display: block;
    }

    /* Add bottom padding to body so footer isn't hidden behind mobile CTA */
    body {
        padding-bottom: 80px;
    }

    .back-to-top {
        bottom: 90px;
        right: 20px;
    }

    .lightbox-overlay {
        padding: 20px;
    }

    .lightbox-details {
        grid-template-columns: 1fr;
    }

    .clients-logos {
        gap: 28px;
    }
}

@media (max-width: 480px) {
    .btn {
        width: 100%;
        justify-content: center;
    }

    .back-to-top {
        width: 42px;
        height: 42px;
        bottom: 85px;
        right: 16px;
    }

    .lightbox-overlay {
        padding: 16px;
    }

    .lightbox-content {
        max-width: 100%;
    }

    .gallery-nav {
        width: 34px;
        height: 34px;
        font-size: 0.8rem;
    }

    .gallery-prev { left: 6px; }
    .gallery-next { right: 6px; }

    .gallery-thumb {
        width: 48px;
        height: 36px;
    }

    .lightbox-body {
        padding: 20px;
    }

    .lightbox-details {
        grid-template-columns: 1fr;
    }
}