/*
================================================
TABLE OF CONTENTS
================================================
1.  GLOBAL STYLES & VARIABLES
2.  UTILITY & HELPER CLASSES
3.  PRELOADER
4.  HEADER & NAVIGATION
5.  HAMBURGER MENU
6.  HERO SECTION
7.  PARTNERS SECTION
8.  SERVICES SECTION
9.  ABOUT SECTION
10. PROCESS SECTION
11. CALCULATOR SECTION
12. TESTIMONIALS SECTION
13. PRICING SECTION
14. CTA (CALL TO ACTION) SECTION
15. FOOTER
16. PAGE-SPECIFIC STYLES (Contact, Legal)
17. INTERACTIVE ELEMENTS (Buttons, Forms, etc.)
18. BACK TO TOP BUTTON
19. POPUP / MODAL
20. ANIMATIONS & KEYFRAMES
21. RESPONSIVE DESIGN (MEDIA QUERIES)
================================================
*/

/* 1. GLOBAL STYLES & VARIABLES */
:root {
    --dark-navy: #0a192f;
    --navy: #112240;
    --light-navy: #233554;
    --lightest-navy: #303C55;
    --navy-shadow: rgba(2, 12, 27, 0.7);
    --slate: #8892b0;
    --light-slate: #a8b2d1;
    --lightest-slate: #ccd6f6;
    --white: #e6f1ff;
    --accent: #64ffda;
    --accent-tint: rgba(100, 255, 218, 0.1);

    --font-primary: 'Poppins', sans-serif;
    --font-secondary: 'Montserrat', sans-serif;

    --fz-xxs: 12px;
    --fz-xs: 13px;
    --fz-sm: 14px;
    --fz-md: 16px;
    --fz-lg: 18px;
    --fz-xl: 20px;
    --fz-xxl: 22px;
    --fz-heading: 32px;

    --border-radius: 4px;
    --nav-height: 100px;
    --nav-scroll-height: 70px;
    --tab-height: 42px;
    --tab-width: 120px;

    --easing: cubic-bezier(0.645, 0.045, 0.355, 1);
    --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
}

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

html {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--slate) var(--dark-navy);
}

::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--dark-navy);
}

::-webkit-scrollbar-thumb {
    background-color: var(--lightest-navy);
    border: 3px solid var(--dark-navy);
    border-radius: 10px;
}

body {
    font-family: var(--font-secondary);
    background-color: var(--dark-navy);
    color: var(--slate);
    line-height: 1.6;
    font-size: var(--fz-md);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-primary);
    color: var(--lightest-slate);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
}

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

a:hover {
    color: var(--accent-tint);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    vertical-align: middle;
}

/* 2. UTILITY & HELPER CLASSES */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-padding {
    padding: 100px 0;
}

.section-header {
    margin-bottom: 60px;
}

.section-header .subtitle {
    color: var(--accent);
    font-family: var(--font-secondary);
    font-weight: 500;
    font-size: var(--fz-md);
    margin-bottom: 10px;
    display: block;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-header h2 {
    font-size: clamp(28px, 5vw, 42px);
    font-weight: 700;
}

.section-header p {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    color: var(--light-slate);
}

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

.btn {
    display: inline-block;
    padding: 12px 28px;
    font-family: var(--font-primary);
    font-weight: 500;
    font-size: var(--fz-sm);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--accent);
    text-align: center;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--dark-navy);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--accent);
}

.btn-secondary {
    background-color: transparent;
    color: var(--accent);
}

.btn-secondary:hover {
    background-color: var(--accent-tint);
}

.btn-full {
    width: 100%;
}

.btn-lg {
    padding: 15px 35px;
    font-size: var(--fz-md);
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s var(--easing), transform 0.6s var(--easing);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 3. PRELOADER */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--dark-navy);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    width: 50px;
    height: 50px;
    border: 5px solid var(--light-navy);
    border-top: 5px solid var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* 4. HEADER & NAVIGATION */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 15px;
    background-color: transparent;
    transition: all 0.3s ease-in-out;
}

.header.scrolled {
    background-color: var(--navy-shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px -10px var(--navy-shadow);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.nav-logo img {
    height: 80px;
    width: auto;
    transition: var(--transition);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    font-family: var(--font-secondary);
    font-size: var(--fz-sm);
    color: var(--light-slate);
    padding: 10px 0;
    position: relative;
}

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

.nav-link::before {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background-color: var(--accent);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 100%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

/* 5. HAMBURGER MENU */
.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--accent);
    border-radius: 5px;
    transition: all 0.3s ease-in-out;
}

/* 6. HERO SECTION */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
    background: url('https://www.transparenttextures.com/patterns/cubes.png');
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
}

.hero-content .subtitle {
    font-size: var(--fz-lg);
    font-weight: 400;
    letter-spacing: 2px;
}

.hero-title {
    font-size: clamp(40px, 8vw, 72px);
    font-weight: 800;
    margin-bottom: 20px;
}

.typed-text {
    color: var(--accent);
}

.cursor {
    display: inline-block;
    width: 3px;
    background-color: var(--accent);
    animation: blink 1s infinite;
}

.hero-description {
    font-size: var(--fz-xl);
    color: var(--light-slate);
    max-width: 600px;
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.hero-bg-shape {
    position: absolute;
    bottom: -50px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--accent-tint) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
    animation: pulse 5s infinite ease-in-out;
}

/* 7. PARTNERS SECTION */
.partners-section {
    padding: 60px 0;
    background-color: var(--navy);
}

.partners-title {
    text-align: center;
    color: var(--slate);
    font-size: var(--fz-md);
    font-weight: 500;
    margin-bottom: 30px;
}

.partners-grid {
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
}

.partner-logo {
    opacity: 0.7;
    transition: var(--transition);
}

.partner-logo:hover {
    opacity: 1;
}

.partner-logo img {
    filter: grayscale(100%) contrast(1.2) brightness(1.5);
    transition: var(--transition);
}

.partner-logo:hover img {
    filter: none;
}

/* 8. SERVICES SECTION */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--navy);
    padding: 40px 30px;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
    border: 1px solid var(--light-navy);
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px -15px var(--navy-shadow);
}

.service-icon {
    font-size: 40px;
    color: var(--accent);
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: var(--fz-xxl);
    margin-bottom: 15px;
}

.service-card p {
    flex-grow: 1;
    color: var(--light-slate);
}

.service-link {
    font-weight: 500;
    margin-top: 20px;
    display: inline-block;
}

.service-link i {
    margin-left: 5px;
    transition: transform 0.2s ease;
}

.service-link:hover i {
    transform: translateX(5px);
}


/* 9. ABOUT SECTION */
.about-wrapper {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    align-items: center;
}

.about-image-part {
    position: relative;
}

.about-image-part img {
    border-radius: var(--border-radius);
    filter: grayscale(40%) contrast(1.1);
    position: relative;
    z-index: 1;
}

.about-image-part::after {
    content: '';
    display: block;
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: var(--border-radius);
    border: 2px solid var(--accent);
    top: 20px;
    left: 20px;
    z-index: 0;
    transition: var(--transition);
}

.about-image-part:hover::after {
    top: 15px;
    left: 15px;
}

.about-content-part .subtitle {
    color: var(--accent);
    font-family: var(--font-secondary);
    font-weight: 500;
}

.about-content-part h2 {
    font-size: clamp(28px, 5vw, 42px);
    margin-bottom: 20px;
}

.about-content-part p {
    color: var(--light-slate);
    margin-bottom: 30px;
}

.about-features {
    padding-left: 0;
}

.about-features li {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    margin-bottom: 20px;
}

.about-features i {
    color: var(--accent);
    font-size: var(--fz-xl);
    margin-top: 5px;
}

.about-features h4 {
    font-size: var(--fz-lg);
    margin-bottom: 5px;
}

.about-features p {
    margin-bottom: 0;
    font-size: var(--fz-sm);
}

/* 10. PROCESS SECTION */
.process-section {
    background-color: var(--navy);
}

.process-timeline {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 36px;
    /* Align with center of icon */
    left: 12.5%;
    width: 75%;
    height: 2px;
    background: var(--light-navy);
    z-index: 0;
}

.timeline-item {
    position: relative;
    padding-top: 80px;
    text-align: center;
}

.timeline-dot {
    position: absolute;
    top: 29px;
    /* Adjust to center */
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: var(--dark-navy);
    border: 3px solid var(--accent);
    z-index: 2;
    transition: var(--transition);
}

.timeline-item:hover .timeline-dot {
    background-color: var(--accent);
}

.timeline-content {
    background: var(--dark-navy);
    padding: 30px;
    border-radius: var(--border-radius);
    border: 1px solid var(--light-navy);
    position: relative;
    transition: var(--transition);
}

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

.timeline-step {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: var(--fz-xxs);
    color: var(--slate);
    font-family: var(--font-secondary);
}

.timeline-icon {
    font-size: 32px;
    color: var(--accent);
    margin-bottom: 20px;
    display: inline-block;
}

.timeline-content h3 {
    font-size: var(--fz-xl);
}

/* 11. CALCULATOR SECTION */
.calculator-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    background: var(--navy);
    padding: 60px;
    border-radius: var(--border-radius);
}

.calculator-content .subtitle {
    color: var(--accent);
}

.calculator-content h2 {
    font-size: clamp(28px, 4vw, 36px);
}

.calculator-content p {
    color: var(--light-slate);
}

.sample-report {
    margin-top: 30px;
}

.sample-report a {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
}

.sample-report i {
    font-size: var(--fz-lg);
}

.roi-form {
    background: var(--dark-navy);
    padding: 30px;
    border-radius: var(--border-radius);
    border: 1px solid var(--light-navy);
}

.roi-result {
    margin-top: 20px;
    background: var(--accent-tint);
    padding: 20px;
    border-radius: var(--border-radius);
    border-left: 3px solid var(--accent);
}

.roi-result h4 {
    font-size: var(--fz-lg);
    margin-bottom: 10px;
    color: var(--light-slate);
}

.roi-result h4:last-child {
    margin-bottom: 0;
}

.roi-result span {
    color: var(--white);
    font-weight: 700;
}

/* 12. TESTIMONIALS SECTION */
.testimonials-section {
    background-color: var(--dark-navy);
}

.testimonial-slider-wrapper {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    overflow: hidden;
}

.testimonial-slider {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.testimonial-slide {
    min-width: 100%;
    padding: 40px;
    background-color: var(--navy);
    border-radius: var(--border-radius);
    box-sizing: border-box;
}

.testimonial-content {
    margin-bottom: 30px;
    position: relative;
    padding-left: 40px;
}

.testimonial-content::before {
    content: '\f10d';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    top: -10px;
    font-size: 30px;
    color: var(--accent);
    opacity: 0.5;
}

.testimonial-content p {
    font-size: var(--fz-lg);
    font-style: italic;
    color: var(--light-slate);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.testimonial-author img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 2px solid var(--accent);
}

.author-info h4 {
    margin-bottom: 2px;
    font-size: var(--fz-md);
}

.author-info span {
    font-size: var(--fz-sm);
    color: var(--slate);
}

.slider-controls {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 10px;
    pointer-events: none;
}

.slider-controls button {
    pointer-events: all;
    background-color: var(--light-navy);
    border: none;
    color: var(--white);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.slider-controls button:hover {
    background-color: var(--accent);
    color: var(--dark-navy);
}


/* 13. PRICING SECTION */
.pricing-section {
    background-color: var(--navy);
}

.pricing-toggle-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-bottom: 40px;
    color: var(--light-slate);
    font-weight: 500;
}

.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--light-navy);
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
}

input:checked+.slider {
    background-color: var(--accent);
}

input:checked+.slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    align-items: center;
}

.pricing-card {
    background-color: var(--dark-navy);
    border-radius: var(--border-radius);
    padding: 40px;
    border: 1px solid var(--light-navy);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.pricing-card.recommended {
    transform: scale(1.05);
    border-color: var(--accent);
}

.pricing-card:hover {
    transform: translateY(-10px) scale(1.02);
}

.pricing-card.recommended:hover {
    transform: translateY(-10px) scale(1.07);
}

.reco-badge {
    position: absolute;
    top: 15px;
    right: -45px;
    background-color: var(--accent);
    color: var(--dark-navy);
    padding: 5px 40px;
    transform: rotate(45deg);
    font-size: var(--fz-xs);
    font-weight: 700;
    text-transform: uppercase;
}

.pricing-header h3 {
    font-size: var(--fz-xxl);
}

.pricing-header p {
    min-height: 48px;
    color: var(--light-slate);
}

.price {
    font-size: 52px;
    font-weight: 700;
    color: var(--white);
    margin: 20px 0;
}

.price-currency {
    font-size: 24px;
    vertical-align: super;
    color: var(--slate);
}

.price-period {
    font-size: var(--fz-md);
    color: var(--slate);
}

.pricing-features {
    text-align: left;
    margin: 30px 0;
}

.pricing-features li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.pricing-features i {
    color: var(--accent);
}

.pricing-features li.fa-times {
    color: var(--slate);
}

/* 14. CTA (CALL TO ACTION) SECTION */
.cta-section {
    padding: 80px 0;
}

.cta-wrapper {
    background: linear-gradient(90deg, var(--accent) 0%, #4ae5bd 100%);
    color: var(--dark-navy);
    padding: 60px;
    border-radius: var(--border-radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
}

.cta-content h2 {
    color: var(--dark-navy);
    font-size: clamp(24px, 4vw, 32px);
    margin-bottom: 10px;
}

.cta-content p {
    color: var(--navy);
    margin-bottom: 0;
    max-width: 600px;
}

.cta-action .btn-primary {
    background-color: var(--white);
    color: var(--dark-navy);
    border-color: var(--white);
}

.cta-action .btn-primary:hover {
    background-color: transparent;
    color: var(--white);
}

/* 15. FOOTER */
.footer {
    background-color: var(--navy);
    padding: 80px 0 30px;
    font-size: var(--fz-sm);
}

.footer-main {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-about .footer-logo img {
    height: 100px;
    margin-bottom: 20px;
}

.footer-about p {
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 15px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    background-color: var(--light-navy);
    color: var(--light-slate);
    border-radius: 50%;
}

.footer-social a:hover {
    background-color: var(--accent);
    color: var(--dark-navy);
}

.footer h3 {
    font-size: var(--fz-lg);
    margin-bottom: 20px;
    color: var(--white);
}

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

.footer-links ul a {
    color: var(--slate);
}

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

.footer-contact ul li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 15px;
}

.footer-contact i {
    color: var(--accent);
    margin-top: 4px;
}

.footer-contact a {
    color: var(--slate);
}

.footer-contact a:hover {
    color: var(--accent);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--light-navy);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--slate);
}

.footer-legal a {
    color: var(--slate);
}

.footer-legal a:hover {
    color: var(--accent);
}

.footer-legal span {
    margin: 0 10px;
}


/* 16. PAGE-SPECIFIC STYLES */
.page-header {
    background-color: var(--navy);
    padding: 150px 0 80px;
    text-align: center;
}

.page-header h1 {
    font-size: clamp(36px, 6vw, 52px);
    margin-bottom: 15px;
}

.page-header p {
    font-size: var(--fz-lg);
    color: var(--light-slate);
    max-width: 600px;
    margin: 0 auto;
}

.breadcrumbs {
    margin-top: 20px;
    color: var(--slate);
}

.breadcrumbs a {
    color: var(--accent);
}

.breadcrumbs span {
    color: var(--light-slate);
}

.contact-page-section .section-header p {
    max-width: 800px;
}

.contact-page-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    background-color: var(--navy);
    padding: 50px;
    border-radius: var(--border-radius);
}

.contact-info-block h3 {
    font-size: var(--fz-xxl);
}

.contact-info-block p {
    color: var(--light-slate);
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-top: 30px;
}

.info-icon {
    font-size: 24px;
    color: var(--accent);
    width: 50px;
    height: 50px;
    background-color: var(--accent-tint);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.info-text h4 {
    font-size: var(--fz-lg);
    margin-bottom: 5px;
}

.info-text p {
    margin: 0;
}

.info-text a {
    color: var(--light-slate);
}

.info-text a:hover {
    color: var(--accent);
}

.contact-form-block {
    background-color: var(--dark-navy);
    padding: 40px;
    border-radius: var(--border-radius);
}

.contact-form-block h3 {
    font-size: var(--fz-xxl);
}

.legal-content {
    background-color: var(--navy);
    padding: 50px;
    border-radius: var(--border-radius);
    max-width: 900px;
    margin: 50px auto;
}

.legal-content h2,
.legal-content h3 {
    margin-top: 30px;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--light-navy);
    padding-bottom: 10px;
}

.legal-content h2:first-of-type,
.legal-content h3:first-of-type {
    margin-top: 0;
}

.legal-content p {
    color: var(--light-slate);
}

.legal-content ul {
    list-style: disc;
    padding-left: 20px;
}

.legal-content li {
    margin-bottom: 10px;
}

/* 17. INTERACTIVE ELEMENTS (Forms) */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: var(--fz-sm);
    color: var(--light-slate);
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    background-color: var(--light-navy);
    border: 1px solid var(--lightest-navy);
    border-radius: var(--border-radius);
    color: var(--white);
    font-family: var(--font-secondary);
    font-size: var(--fz-md);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-tint);
}

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

/* 18. BACK TO TOP BUTTON */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--accent);
    color: var(--dark-navy);
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    font-size: var(--fz-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px var(--accent-tint);
}

/* 19. POPUP / MODAL */
.popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 25, 47, 0.8);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.popup.visible {
    opacity: 1;
    visibility: visible;
}

.popup-content {
    background-color: var(--navy);
    padding: 40px;
    border-radius: var(--border-radius);
    text-align: center;
    max-width: 450px;
    width: 90%;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.popup.visible .popup-content {
    transform: scale(1);
}

.popup-close {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 24px;
    color: var(--slate);
    cursor: pointer;
}

.popup-icon {
    font-size: 60px;
    color: var(--accent);
    margin-bottom: 20px;
}

.popup-content h3 {
    font-size: var(--fz-xxl);
    color: var(--white);
}

.popup-content p {
    color: var(--light-slate);
    margin-bottom: 30px;
}


/* 20. ANIMATIONS & KEYFRAMES */
@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

@keyframes pulse {
    0% {
        transform: scale(0.95);
        opacity: 0.8;
    }

    50% {
        transform: scale(1.1);
        opacity: 0.5;
    }

    100% {
        transform: scale(0.95);
        opacity: 0.8;
    }
}

/* 21. RESPONSIVE DESIGN (MEDIA QUERIES) */

/* Tablets and smaller desktops */
@media (max-width: 1024px) {
    .about-wrapper {
        grid-template-columns: 1fr;
    }

    .about-image-part {
        max-width: 500px;
        margin: 0 auto 40px;
    }

    .footer-main {
        grid-template-columns: 1fr 1fr;
    }

    .footer-about {
        grid-column: 1 / -1;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: auto;
    }

    .pricing-card.recommended {
        transform: scale(1);
    }

    .pricing-card:hover {
        transform: translateY(-10px);
    }

    .pricing-card.recommended:hover {
        transform: translateY(-10px) scale(1.02);
    }

    .process-timeline {
        grid-template-columns: 1fr 1fr;
        gap: 40px 20px;
    }

    .process-timeline::before {
        display: none;
    }

    /* Hide line on 2x2 grid */
    .calculator-wrapper {
        grid-template-columns: 1fr;
    }
}

/* Mobile devices */
@media (max-width: 768px) {
    :root {
        --nav-height: 80px;
        --nav-scroll-height: 60px;
    }

    .section-padding {
        padding: 80px 0;
    }

    .hamburger {
        display: block;
        z-index: 1002;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 0;
        width: 75%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--navy);
        flex-direction: column;
        justify-content: center;
        gap: 40px;
        transition: 0.3s ease;
        box-shadow: 2px 0 20px var(--navy-shadow);
        z-index: 1001;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-link {
        font-size: var(--fz-lg);
    }

    .header-actions .btn {
        display: none;
    }

    .hero-content {
        text-align: center;
    }

    .hero-description {
        margin: 0 auto 30px;
    }

    .hero-buttons {
        justify-content: center;
        flex-direction: column;
        gap: 15px;
        align-items: center;
    }

    .partners-grid {
        justify-content: center;
    }

    .process-timeline {
        grid-template-columns: 1fr;
    }

    .contact-page-wrapper {
        grid-template-columns: 1fr;
        padding: 30px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-main {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .cta-wrapper {
        flex-direction: column;
        text-align: center;
        padding: 40px;
    }

    .slider-controls {
        display: none;
    }
}