/*
================================================
Theme: Dark Matter Collapse
Author: AI Assistant
================================================

TABLE OF CONTENTS
-----------------
1.  :root Variables
2.  Global Styles & Resets
3.  Utility Classes (Container, Buttons, etc.)
4.  Header & Navigation
5.  Footer
6.  General Page & Section Styles
7.  Hero Section & Particle Canvas
8.  Services Section (3D Flip Cards)
9.  Process Timeline Section
10. Industries Section
11. Testimonials Section (Slider)
12. CTA (Call to Action) Section
13. Contact Page Styles
14. Legal Pages Styles
15. Animations & Keyframes
16. Helper & Interactive Elements (Back to Top, Popup)
17. Responsive Design (Media Queries)

================================================
*/

/* 1. :root Variables
------------------------------------------------ */
:root {
    --color-primary: #00f2fe;
    /* Bright Cyan */
    --color-primary-dark: #00c1cb;
    --color-secondary: #a450ff;
    /* Vibrant Purple */
    --color-background: #0d0c1d;
    /* Deep Space Blue/Black */
    --color-surface: #16152b;
    /* Slightly Lighter Surface */
    --color-surface-light: #2a284d;
    --color-text-primary: #f0f0f0;
    --color-text-secondary: #a9a8c3;
    --color-border: rgba(164, 80, 255, 0.2);
    --color-shadow: rgba(0, 242, 254, 0.1);

    --font-family-base: 'Poppins', sans-serif;
    --header-height: 80px;
    --transition-speed-fast: 0.3s;
    --transition-speed-slow: 0.6s;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
}

/* 2. Global Styles & Resets
------------------------------------------------ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family-base);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text-primary);
}

h1 {
    font-size: 3.5rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.2rem;
}

p {
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-speed-fast) ease;
}

a:hover {
    color: var(--color-primary-dark);
}

ul {
    list-style: none;
}

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

::selection {
    background-color: var(--color-primary);
    color: var(--color-background);
}

/* 3. Utility Classes
------------------------------------------------ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

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

.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    text-align: center;
    text-transform: capitalize;
    transition: all var(--transition-speed-fast) ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: var(--color-background);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 242, 254, 0.2);
}

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

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-background);
    transform: translateY(-3px);
}

.btn-lg {
    padding: 15px 40px;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.9rem;
}

.btn-full {
    width: 100%;
}


/* 4. Header & Navigation
------------------------------------------------ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 1000;
    transition: all var(--transition-speed-fast) ease;
    background-color: transparent;
}

.header.scrolled {
    background-color: rgba(13, 12, 29, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    height: 70px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

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

.logo {
    height: 80px;
    transition: height var(--transition-speed-fast) ease;
}


.nav-menu {
    display: flex;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    color: var(--color-text-primary);
    font-weight: 500;
    position: relative;
    padding: 5px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-speed-fast) ease;
}

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

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

.menu-toggle {
    display: none;
    cursor: pointer;
    width: 30px;
    height: 22px;
    position: relative;
    z-index: 1010;
}

.bar {
    width: 100%;
    height: 3px;
    background-color: var(--color-text-primary);
    border-radius: 5px;
    position: absolute;
    transition: all 0.4s cubic-bezier(0.68, -0.6, 0.32, 1.6);
}

.bar:nth-child(1) {
    top: 0;
}

.bar:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

.bar:nth-child(3) {
    bottom: 0;
}

.menu-toggle.is-active .bar:nth-child(1) {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
}

.menu-toggle.is-active .bar:nth-child(2) {
    opacity: 0;
}

.menu-toggle.is-active .bar:nth-child(3) {
    bottom: 50%;
    transform: translateY(50%) rotate(-45deg);
}

/* 5. Footer
------------------------------------------------ */
.footer {
    background-color: var(--color-surface);
    color: var(--color-text-secondary);
    padding-top: 150px;
    position: relative;
}

.footer-wave {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 320'%3E%3Cpath fill='%230d0c1d' fill-opacity='1' d='M0,160L48,176C96,192,192,224,288,213.3C384,203,480,149,576,133.3C672,117,768,139,864,165.3C960,192,1056,224,1152,218.7C1248,213,1344,171,1392,149.3L1440,128L1440,0L1392,0C1344,0,1248,0,1152,0C1056,0,960,0,864,0C768,0,672,0,576,0C480,0,384,0,288,0C192,0,96,0,48,0L0,0Z'%3E%3C/path%3E%3C/svg%3E") no-repeat center center;
    background-size: cover;
    transform: translateY(-99px) rotate(180);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    padding-bottom: 50px;
}

.footer-logo {
    height: 80px;
    margin-bottom: 20px;
}

.footer-about-text {
    margin-bottom: 25px;
}

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

.social-links a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--color-surface-light);
    color: var(--color-text-secondary);
    transition: all var(--transition-speed-fast) ease;
}

.social-links a:hover {
    background-color: var(--color-primary);
    color: var(--color-background);
    transform: translateY(-4px);
}

.footer-col-title {
    color: var(--color-text-primary);
    font-size: 1.25rem;
    margin-bottom: 20px;
    position: relative;
}

.footer-col-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
}

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

.footer-links ul li a:hover {
    padding-left: 5px;
}

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

.footer-contact ul li i {
    color: var(--color-primary);
    margin-top: 5px;
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding: 25px 0;
    text-align: center;
}

/* 6. General Page & Section Styles
------------------------------------------------ */
.page-header {
    padding: 180px 0 100px;
    text-align: center;
    position: relative;
    background: linear-gradient(180deg, var(--color-background) 0%, rgba(13, 12, 29, 0) 100%);
    overflow: hidden;
}

.page-header-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 0%, rgba(164, 80, 255, 0.15), transparent 70%);
    z-index: -1;
}

.page-header h1 {
    font-size: 3.5rem;
}

.page-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 10px auto 0;
}

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

.section-tag {
    display: inline-block;
    background: linear-gradient(90deg, rgba(0, 242, 254, 0.1), rgba(164, 80, 255, 0.1));
    color: var(--color-primary);
    padding: 8px 20px;
    border-radius: 50px;
    font-weight: 500;
    margin-bottom: 15px;
    border: 1px solid rgba(0, 242, 254, 0.2);
}

.section-title {
    font-size: 2.8rem;
    margin-bottom: 15px;
}

.section-subtitle {
    max-width: 700px;
    margin: 0 auto;
    color: var(--color-text-secondary);
    font-size: 1.1rem;
}

/* 7. Hero Section & Particle Canvas
------------------------------------------------ */
.hero-section {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    padding-top: var(--header-height);
}

#particle-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 25px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.hero-title .word {
    display: inline-block;
    opacity: 0;
    transform: translateY(30px);
    animation: word-reveal 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.hero-title .word:nth-child(2) {
    animation-delay: 0.2s;
}

.hero-title .word:nth-child(3) {
    animation-delay: 0.4s;
}

.hero-subtitle {
    font-size: 1.25rem;
    max-width: 750px;
    margin: 0 auto 40px;
    color: var(--color-text-secondary);
    opacity: 0;
    transform: translateY(20px);
    animation: fade-in-up 0.8s ease-out 0.6s forwards;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: 20px;
    opacity: 0;
    transform: translateY(20px);
    animation: fade-in-up 0.8s ease-out 0.8s forwards;
}

.scroll-down-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    animation: fade-in-up 1s ease 1.5s forwards;
}

.mouse {
    width: 25px;
    height: 45px;
    border: 2px solid var(--color-text-secondary);
    border-radius: 20px;
    position: relative;
}

.mouse span {
    position: absolute;
    width: 4px;
    height: 8px;
    background-color: var(--color-primary);
    border-radius: 4px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-anim 2s infinite;
}

/* 8. Services Section (3D Flip Cards)
------------------------------------------------ */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: transparent;
    aspect-ratio: 1 / 1.1;
    perspective: 1000px;
}

.service-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform var(--transition-speed-slow) cubic-bezier(0.25, 0.8, 0.25, 1);
    transform-style: preserve-3d;
}

.service-card:hover .service-card-inner {
    transform: rotateY(180deg);
}

.service-card-front,
.service-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 30px;
    border-radius: var(--border-radius-md);
    background: linear-gradient(145deg, var(--color-surface), #1e1c3a);
    border: 1px solid var(--color-border);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.service-card-back {
    transform: rotateY(180deg);
    align-items: flex-start;
    text-align: left;
    justify-content: flex-start;
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--color-primary);
    text-shadow: 0 0 15px var(--color-shadow);
}

.service-title {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--color-text-primary);
}

.service-description {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.service-back-title {
    color: var(--color-primary);
    margin-bottom: 15px;
    align-self: center;
}

.service-card-back ul {
    width: 100%;
    padding-left: 20px;
    margin-bottom: auto;
}

.service-card-back ul li {
    margin-bottom: 10px;
    position: relative;
}

.service-card-back ul li::before {
    content: '\f00c';
    /* FontAwesome check icon */
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--color-primary);
    position: absolute;
    left: -20px;
}

.service-card-back .btn {
    align-self: center;
    margin-top: 20px;
}

/* 9. Process Timeline Section
------------------------------------------------ */
.process-section {
    background-color: var(--color-surface);
}

.process-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.process-timeline::after {
    content: '';
    position: absolute;
    width: 4px;
    background: linear-gradient(to bottom, var(--color-secondary), var(--color-primary));
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
    border-radius: 2px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    width: 50%;
}

.timeline-item:nth-child(odd) {
    left: 0;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-icon {
    position: absolute;
    width: 50px;
    height: 50px;
    right: -25px;
    top: 30px;
    background-color: var(--color-secondary);
    border: 4px solid var(--color-background);
    border-radius: 50%;
    z-index: 10;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
}

.timeline-item:nth-child(even) .timeline-icon {
    left: -25px;
}

.timeline-content {
    padding: 30px;
    background: var(--color-background);
    position: relative;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-border);
}

.timeline-item:nth-child(odd) {
    text-align: right;
}

.timeline-step {
    font-size: 3rem;
    font-weight: 800;
    position: absolute;
    top: 10px;
    right: 30px;
    color: rgba(255, 255, 255, 0.05);
}

.timeline-item:nth-child(even) .timeline-step {
    right: auto;
    left: 30px;
}

.timeline-title {
    font-size: 1.4rem;
    color: var(--color-primary);
    margin-bottom: 10px;
}

/* 10. Industries Section
------------------------------------------------ */
.industries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 30px;
}

.industry-item {
    background-color: var(--color-surface);
    padding: 30px;
    border-radius: var(--border-radius-md);
    text-align: center;
    border: 1px solid transparent;
    transition: all var(--transition-speed-fast) ease;
}

.industry-item:hover {
    transform: translateY(-10px);
    border-color: var(--color-primary);
    box-shadow: 0 15px 30px var(--color-shadow);
}

.industry-item i {
    font-size: 3rem;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.industry-item h4 {
    font-size: 1.1rem;
    color: var(--color-text-primary);
}

/* 11. Testimonials Section
------------------------------------------------ */
.testimonials-section {
    background-color: var(--color-surface);
}

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

.testimonial-slider {
    display: flex;
    transition: transform var(--transition-speed-slow) ease-in-out;
}

.testimonial-slide {
    min-width: 100%;
    padding: 40px;
    background-color: var(--color-background);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-border);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.testimonial-content {
    text-align: center;
    margin-bottom: 30px;
}

.testimonial-content i {
    font-size: 2.5rem;
    color: var(--color-secondary);
    margin-bottom: 15px;
}

.testimonial-content p {
    font-style: italic;
    font-size: 1.1rem;
    color: var(--color-text-primary);
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
}

.author-info h4 {
    color: var(--color-text-primary);
    font-size: 1.1rem;
}

.author-info span {
    color: var(--color-primary);
    font-size: 0.9rem;
}

.slider-controls {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 10px;
    left: 0;
}

.slider-controls button {
    background: var(--color-surface-light);
    color: var(--color-primary);
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-speed-fast) ease;
}

.slider-controls button:hover {
    background: var(--color-primary);
    color: var(--color-background);
}

.prev-btn {
    transform: translateX(-60px);
}

.next-btn {
    transform: translateX(60px);
}

/* 12. CTA Section
------------------------------------------------ */
.cta-section {
    padding: 100px 0;
    background-color: var(--color-background);
    position: relative;
    overflow: hidden;
}

.cta-bg-shape {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1200px;
    height: 1200px;
    background: radial-gradient(circle, var(--color-secondary) 0%, transparent 60%);
    opacity: 0.1;
    transform: translate(-50%, -50%);
    animation: pulse 5s infinite;
}

.cta-container {
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: 2.5rem;
    max-width: 700px;
    margin: 0 auto 20px;
}

.cta-text {
    max-width: 650px;
    margin: 0 auto 40px;
}

/* 13. Contact Page Styles
------------------------------------------------ */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
    background-color: var(--color-surface);
    padding: 50px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-border);
}

.contact-info-panel h3 {
    margin-top: 15px;
    margin-bottom: 20px;
    font-size: 2rem;
}

.contact-details-list {
    margin-top: 40px;
    list-style: none;
}

.contact-details-list li {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-details-list i {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-top: 5px;
    width: 30px;
    text-align: center;
}

.contact-details-list h4 {
    margin-bottom: 5px;
    color: var(--color-text-primary);
}

.contact-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.contact-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.contact-form input,
.contact-form textarea,
.contact-form select {
    width: 100%;
    padding: 12px 15px;
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    color: var(--color-text-primary);
    font-family: var(--font-family-base);
    transition: border-color var(--transition-speed-fast) ease, box-shadow var(--transition-speed-fast) ease;
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-shadow);
}

.contact-form select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%2300f2fe' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
}

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

.contact-form button i {
    margin-left: 10px;
}

/* 14. Legal Pages Styles
------------------------------------------------ */
.legal-content {
    background: var(--color-surface);
    padding: 40px 50px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--color-border);
}

.legal-content h2 {
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-top: 40px;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 10px;
}

.legal-content p,
.legal-content li {
    line-height: 1.8;
}

/* 15. Animations & Keyframes
------------------------------------------------ */
@keyframes scroll-anim {
    0% {
        transform: translateY(5px) translateX(-50%);
        opacity: 1;
    }

    100% {
        transform: translateY(20px) translateX(-50%);
        opacity: 0;
    }
}

@keyframes word-reveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.1;
    }

    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.15;
    }

    100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.1;
    }
}

[data-animation] {
    opacity: 0;
    transition: opacity 0.8s ease-out, transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

[data-animation="fade-in"] {
    transform: scale(0.95);
}

[data-animation="fade-in-up"] {
    transform: translateY(50px);
}

[data-animation="fade-in-down"] {
    transform: translateY(-50px);
}

[data-animation="fade-in-left"] {
    transform: translateX(-50px);
}

[data-animation="fade-in-right"] {
    transform: translateX(50px);
}

[data-animation="service-explode"] {
    transform: scale(0.5) rotate(-30deg);
}

[data-animation="timeline-reveal-left"] {
    transform: translateX(-100px) scale(0.8);
}

[data-animation="timeline-reveal-right"] {
    transform: translateX(100px) scale(0.8);
}

.is-visible[data-animation] {
    opacity: 1;
    transform: translate(0, 0) scale(1) rotate(0);
}

.animate-on-load {
    animation-duration: 0.8s;
    animation-fill-mode: forwards;
    animation-timing-function: ease-out;
}

.animate-on-load[data-delay] {
    animation-delay: calc(var(--delay, 0) * 1ms);
}

.animate-on-load[data-animation="fade-in-down"] {
    animation-name: fade-in-down-anim;
}

.animate-on-load[data-animation="fade-in-up"] {
    animation-name: fade-in-up-anim;
}

@keyframes fade-in-down-anim {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }

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

@keyframes fade-in-up-anim {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

/* 16. Helper & Interactive Elements
------------------------------------------------ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    background-color: var(--color-primary);
    color: var(--color-background);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-speed-fast) ease;
}

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

.back-to-top:hover {
    background-color: var(--color-primary-dark);
    transform: scale(1.1);
}

/* Popup Styles */
.popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-speed-fast) ease;
}

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

.popup-content {
    background-color: var(--color-surface);
    padding: 40px;
    border-radius: var(--border-radius-md);
    text-align: center;
    position: relative;
    max-width: 450px;
    width: 90%;
    border: 1px solid var(--color-border);
    transform: scale(0.9);
    transition: transform var(--transition-speed-fast) ease;
}

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

.close-popup {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 2rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    line-height: 1;
}

.popup-icon {
    font-size: 4rem;
    color: #28a745;
    /* Success Green */
    margin-bottom: 20px;
}

.popup-content h3 {
    margin-bottom: 15px;
    font-size: 1.8rem;
}

/* 17. Responsive Design
------------------------------------------------ */
@media (max-width: 992px) {
    h1 {
        font-size: 2.8rem;
    }

    h2 {
        font-size: 2rem;
    }

    .hero-title {
        font-size: 3.5rem;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background-color: var(--color-background);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: right var(--transition-speed-fast) ease-in-out;
    }

    .nav-menu.is-active {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        gap: 50px;
    }

    .nav-link {
        font-size: 1.5rem;
    }

    .menu-toggle {
        display: block;
    }

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

    .nav-menu.is-active+.header-actions .btn {
        display: inline-block;
        /* Show quote button inside mobile menu */
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .slider-controls button {
        width: 40px;
        height: 40px;
    }

    .prev-btn {
        transform: translateX(-20px);
    }

    .next-btn {
        transform: translateX(20px);
    }
}

@media (max-width: 768px) {
    .section-padding {
        padding: 80px 0;
    }

    h1,
    .hero-title {
        font-size: 2.5rem;
    }

    .page-header h1 {
        font-size: 2.8rem;
    }

    .section-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .process-timeline::after {
        left: 25px;
    }

    .timeline-item,
    .timeline-item:nth-child(even) {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
        left: 0;
        text-align: left !important;
    }

    .timeline-icon,
    .timeline-item:nth-child(even) .timeline-icon {
        left: 0;
    }

    .timeline-step {
        left: auto !important;
        right: 30px !important;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-col {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .footer-col-title::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .social-links {
        justify-content: center;
    }

    .footer-contact ul li {
        justify-content: center;
    }

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

    .contact-wrapper {
        padding: 30px;
    }

    .legal-content {
        padding: 30px 20px;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }

    .btn-lg {
        padding: 12px 25px;
        font-size: 1rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .service-card {
        aspect-ratio: unset;
        min-height: 350px;
    }

    .industries-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .testimonial-slide {
        padding: 30px 20px;
    }

    .slider-controls {
        display: none;
    }

    /* Hide controls on very small screens, rely on swipe/auto */
}