/* ==========================================================================
   TABLE OF CONTENTS
   --------------------------------------------------------------------------
   1. ROOT VARIABLES & GLOBAL STYLES (Light Theme)
   2. REUSABLE COMPONENTS (Buttons, Containers, etc.)
   3. HEADER & NAVIGATION
   4. HERO SECTION
   5. SERVICES SECTION
   6. ABOUT & STATS SECTION
   7. OUR PROCESS SECTION (Timeline)
   8. ROI CALCULATOR SECTION
   9. PRICING SECTION
   10. TESTIMONIALS SECTION
   11. CTA SECTION
   12. FOOTER
   13. LIVE CHAT SIMULATOR
   14. ANIMATIONS & EFFECTS
   15. RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */

/* ==========================================================================
   1. ROOT VARIABLES & GLOBAL STYLES (Light Theme)
   ========================================================================== */
:root {
    --header-height: 5rem;

    /* Colors */
    --primary-color: #005A9C; /* Professional Blue */
    --secondary-color: #4CAF50; /* Fresh Green */
    --primary-color-dark: #004a80;
    --secondary-color-dark: #409a43;
    
    --bg-light: #FFFFFF;
    --bg-off-white: #f8f9fa;
    --text-dark: #333333;
    --text-muted: #6c757d;
    --border-color: #dee2e6;

    /* Typography */
    --font-primary: 'Montserrat', sans-serif;
    --font-secondary: 'Open Sans', sans-serif;

    /* Font sizes */
    --fs-h1: clamp(2.5rem, 5vw + 1rem, 3.75rem);
    --fs-h2: clamp(2rem, 4vw + 0.5rem, 2.75rem);
    --fs-h3: clamp(1.2rem, 2vw + 0.5rem, 1.5rem);
    --fs-body: 1rem;

    /* Transitions & Borders */
    --transition-smooth: all 0.3s ease-in-out;
    --border-radius: 8px;
    --box-shadow-soft: 0 4px 15px rgba(0, 0, 0, 0.05);
    --box-shadow-medium: 0 8px 25px rgba(0, 0, 0, 0.1);
}

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

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

body {
    font-family: var(--font-secondary);
    font-size: var(--fs-body);
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.7;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-dark);
}

ul {
    list-style: none;
}

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

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

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

/* ==========================================================================
   2. REUSABLE COMPONENTS
   ========================================================================== */
.container {
    max-width: 1140px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

.grid {
    display: grid;
    gap: 2rem;
}

.section {
    padding: 6rem 0;
}

.section:nth-of-type(odd) {
    background-color: var(--bg-off-white);
}

.section-title {
    font-size: var(--fs-h2);
    font-weight: 800;
    margin-bottom: 1.5rem;
    text-align: center;
}

.section-subtitle {
    display: block;
    text-align: center;
    color: var(--primary-color);
    font-family: var(--font-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

.button {
    display: inline-block;
    padding: 0.8rem 2rem;
    font-family: var(--font-primary);
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: 2px solid transparent;
    text-align: center;
    font-size: 0.9rem;
}

.button--primary {
    background-color: var(--primary-color);
    color: var(--bg-light);
}

.button--primary:hover {
    background-color: var(--primary-color-dark);
    transform: translateY(-3px);
    box-shadow: var(--box-shadow-medium);
}

.button--secondary {
    background-color: var(--secondary-color);
    color: var(--bg-light);
}
.button--secondary:hover {
    background-color: var(--secondary-color-dark);
    transform: translateY(-3px);
    box-shadow: var(--box-shadow-medium);
}

.button--outline {
    background-color: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
}
.button--outline:hover {
    background-color: var(--primary-color);
    color: var(--bg-light);
}

.button--lg {
    padding: 1rem 2.5rem;
    font-size: 1rem;
}

.button--full {
    width: 100%;
}

/* ==========================================================================
   3. HEADER & NAVIGATION
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: transparent;
    transition: background-color 0.4s, box-shadow 0.4s, padding 0.4s;
    padding: 1rem 0;
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.07);
    padding: 0.5rem 0;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
}

.nav__logo img {
    height: auto;
    width: 180px;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav__link {
    color: var(--text-dark);
    font-family: var(--font-primary);
    font-weight: 600;
    position: relative;
    padding-bottom: 0.25rem;
    font-size: 0.95rem;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav__link:hover::after,
.nav__link.active-link::after {
    width: 60%;
}

.nav__link.active-link {
    color: var(--primary-color);
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav__toggle, .nav__close {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-dark);
}

/* ==========================================================================
   4. HERO SECTION
   ========================================================================== */
.hero {
    padding: calc(var(--header-height) + 4rem) 0 4rem;
    background-color: var(--bg-off-white);
    overflow: hidden;
}

.hero__container {
    grid-template-columns: 1fr 1fr;
    align-items: center;
}

.hero__data {
    max-width: 550px;
}

.hero__title {
    font-size: var(--fs-h1);
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.hero__title .highlight {
    color: var(--primary-color);
}

.hero__description {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.hero__buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.hero__image-wrapper {
    position: relative;
    justify-self: center;
}

.hero__image {
    width: 100%;
    max-width: 450px;
    border-radius: var(--border-radius);
    position: relative;
    z-index: 2;
}

.hero__image-bg-shape {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--border-radius);
    top: -20px;
    left: 20px;
    z-index: 1;
    opacity: 0.15;
}

.hero__social-proof {
    text-align: center;
    margin-top: 5rem;
}

.hero__social-proof p {
    font-family: var(--font-primary);
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.hero__social-proof .logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 3rem;
    filter: grayscale(100%);
    opacity: 0.6;
}
.hero__social-proof .logos span {
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ==========================================================================
   5. SERVICES SECTION
   ========================================================================== */
.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--bg-light);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition-smooth);
    border: 1px solid var(--border-color);
    box-shadow: var(--box-shadow-soft);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow-medium);
}

.service-card__icon-wrapper {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    background-color: #e6f0ff;
    color: var(--primary-color);
    display: grid;
    place-items: center;
    font-size: 2rem;
    transition: var(--transition-smooth);
}

.service-card:hover .service-card__icon-wrapper {
    background-color: var(--primary-color);
    color: var(--bg-light);
    transform: rotate(15deg);
}

.service-card__title {
    font-size: var(--fs-h3);
    margin-bottom: 1rem;
}

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

/* ==========================================================================
   6. ABOUT & STATS SECTION
   ========================================================================== */
.about__container {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
}

.about__data .section-title,
.about__data .section-subtitle {
    text-align: left;
}
.about__description {
    margin-bottom: 2rem;
    color: var(--text-muted);
}
.about__list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.about__list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}
.about__list i {
    color: var(--secondary-color);
    margin-top: 5px;
}

.about__stats-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 3rem;
    border-radius: var(--border-radius);
}

.stat-item {
    text-align: center;
}
.stat__number {
    font-size: 3rem;
    font-weight: 800;
    color: white;
}
.stat__text {
    font-weight: 600;
    opacity: 0.9;
}

/* ==========================================================================
   7. OUR PROCESS SECTION (Timeline)
   ========================================================================== */
.process__timeline {
    position: relative;
    max-width: 800px;
    margin: 4rem auto 0;
}
.process__timeline::after {
    content: '';
    position: absolute;
    width: 4px;
    background: var(--border-color);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -2px;
}

.timeline__item {
    padding: 1rem 3rem;
    position: relative;
    background-color: inherit;
    width: 50%;
}
.timeline__item:nth-child(odd) {
    left: 0;
    padding-right: 4rem;
}
.timeline__item:nth-child(even) {
    left: 50%;
    padding-left: 4rem;
}

.timeline__icon {
    position: absolute;
    width: 50px;
    height: 50px;
    right: -25px;
    top: 50%;
    transform: translateY(-50%);
    background-color: var(--bg-light);
    border: 4px solid var(--secondary-color);
    border-radius: 50%;
    z-index: 1;
    display: grid;
    place-items: center;
    font-size: 1.5rem;
    color: var(--secondary-color);
    transition: var(--transition-smooth);
}
.timeline__item:nth-child(even) .timeline__icon {
    left: -25px;
}
.timeline__item:hover .timeline__icon {
    background-color: var(--secondary-color);
    color: white;
    transform: translateY(-50%) scale(1.1);
}

.timeline__content {
    padding: 2rem;
    background-color: white;
    position: relative;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow-soft);
    border: 1px solid var(--border-color);
}
.timeline__item:nth-child(odd) .timeline__content {
    text-align: right;
}
.timeline__step {
    font-family: var(--font-primary);
    font-weight: 700;
    color: var(--secondary-color);
    font-size: 0.8rem;
    text-transform: uppercase;
}
.timeline__title {
    font-size: var(--fs-h3);
    margin: 0.5rem 0;
}
.timeline__content p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ==========================================================================
   8. ROI CALCULATOR SECTION
   ========================================================================== */
.roi-calculator {
    display: grid;
    grid-template-columns: 2fr 1.2fr;
    gap: 3rem;
    background-color: var(--bg-light);
    padding: 3rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--box-shadow-medium);
}
.form-group {
    margin-bottom: 2rem;
}
.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
}
.form-group .range-value {
    font-family: var(--font-primary);
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}
.form-group input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 5px;
    outline: none;
    cursor: pointer;
}
.form-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none; appearance: none;
    width: 22px; height: 22px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
}

.roi-calculator__results {
    background: var(--bg-off-white);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    border-left: 4px solid var(--secondary-color);
}
.results__title {
    font-size: 1.3rem;
    margin-bottom: 2rem;
}
.result-item {
    margin-bottom: 1.5rem;
}
.result-item h4 {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
}
.result-item p {
    font-size: 2.2rem;
    font-weight: 700;
    font-family: var(--font-primary);
    color: var(--text-dark);
}
.result-item.highlight p {
    color: var(--secondary-color);
    font-size: 2.5rem;
}
.result-item small {
    color: var(--text-muted);
    font-size: 0.8rem;
    display: block;
    margin-top: 1.5rem;
}
/* ==========================================================================
   9. PRICING SECTION
   ========================================================================== */
.pricing__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    align-items: center;
    margin-top: 3rem;
}

.pricing-card {
    background: var(--bg-light);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: all 0.4s ease;
    position: relative;
    text-align: center;
    box-shadow: var(--box-shadow-soft);
}

.pricing-card.featured {
    transform: scale(1.05);
    border: 2px solid var(--primary-color);
    box-shadow: var(--box-shadow-medium);
}
.pricing-card__badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--primary-color);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 0.8rem;
}
.pricing-card__header {
    margin-bottom: 2rem;
}
.pricing-card__title {
    font-size: 1.5rem;
}
.pricing-card__subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
}
.pricing-card__price {
    font-size: 3.5rem;
    font-family: var(--font-primary);
    font-weight: 800;
    margin: 1.5rem 0;
    color: var(--primary-color);
}
.pricing-card__price sup {
    font-size: 1.5rem;
    font-weight: 600;
    top: -1.5em;
}
.pricing-card__price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-muted);
}
.pricing-card__features {
    margin: 2rem 0;
    text-align: left;
}
.pricing-card__features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}
.pricing-card__features i {
    color: var(--secondary-color);
}
.pricing-card__features li.disabled {
    color: var(--text-muted);
    opacity: 0.7;
}
.pricing-card__features li.disabled i {
    color: #ccc;
}
/* ==========================================================================
   10. TESTIMONIALS SECTION
   ========================================================================== */
.testimonial-slider {
    position: relative;
    max-width: 850px;
    margin: 3rem auto 0;
    overflow: hidden;
}

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

.testimonial-slide {
    min-width: 100%;
    box-sizing: border-box;
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 2rem;
    align-items: center;
    padding: 1rem;
    opacity: 0;
    transition: opacity 0.5s ease;
    position: absolute;
    top: 0; left: 0;
}
.testimonial-slide.active {
    opacity: 1;
    position: relative;
}

.testimonial__img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
}
.testimonial__text {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-muted);
    margin-bottom: 1rem;
    position: relative;
    padding-left: 2rem;
}
.testimonial__text::before {
    content: '\f10d';
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 0;
    font-size: 1.5rem;
    color: var(--primary-color);
    opacity: 0.2;
}
.testimonial__name {
    font-size: 1.1rem;
    color: var(--text-dark);
}
.testimonial__company {
    color: var(--text-muted);
    font-weight: 600;
}
.testimonial-dots {
    text-align: center;
    margin-top: 2rem;
}
.testimonial-dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--border-color);
    margin: 0 5px;
    cursor: pointer;
    transition: var(--transition-smooth);
}
.testimonial-dot.active {
    background-color: var(--primary-color);
    transform: scale(1.2);
}

/* ==========================================================================
   11. CTA SECTION
   ========================================================================== */
.cta-section {
    padding: 5rem 0;
    background: linear-gradient(45deg, var(--primary-color), var(--primary-color-dark));
}
.cta__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}
.cta__content {
    color: white;
}
.cta__title {
    font-size: var(--fs-h2);
    color: white;
    margin-bottom: 0.5rem;
}
.cta__description {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 600px;
}
.cta__action .button {
    background-color: var(--bg-light);
    color: var(--primary-color);
}
.cta__action .button:hover {
    background-color: var(--bg-off-white);
    transform: scale(1.05);
}

/* ==========================================================================
   12. FOOTER
   ========================================================================== */
.footer {
    background-color: #1a1a1a;
    color: var(--text-muted);
    padding-top: 5rem;
}
.footer__container {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 3rem;
}
.footer__logo img {
    height: auto;
    width: 180px;
    margin-bottom: 1rem;
    filter: brightness(0) invert(1) grayscale(1) contrast(10);
    opacity: 0.8;
}
.footer__about-text {
    margin-bottom: 1.5rem;
    max-width: 300px;
}
.footer__socials {
    display: flex;
    gap: 1rem;
}
.social-link {
    width: 40px; height: 40px;
    display: grid; place-items: center;
    background: #333;
    border-radius: 50%;
    color: var(--text-muted);
    transition: var(--transition-smooth);
}
.social-link:hover {
    background: var(--primary-color);
    color: white;
}
.footer__title {
    font-size: 1.1rem;
    font-family: var(--font-primary);
    margin-bottom: 1.5rem;
    color: white;
    font-weight: 600;
}
.footer__links li, .footer__contact li {
    margin-bottom: 0.75rem;
}
.footer__links a {
    color: var(--text-muted);
}
.footer__links a:hover {
    color: white;
    padding-left: 5px;
}
.footer__contact li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}
.footer__contact i {
    color: var(--primary-color);
    margin-top: 4px;
}
.footer__bottom {
    margin-top: 4rem;
    padding: 1.5rem 0;
    border-top: 1px solid #333;
}
.footer__bottom-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}
.footer__copyright {
    font-size: 0.9rem;
}
.footer__legal {
    display: flex;
    gap: 1.5rem;
}
.footer__legal a {
    font-size: 0.9rem;
    color: var(--text-muted);
}
/* Legal Pages Styling (for light theme) */
.legal-page .header {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.07);
}
.legal-container {
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    padding: 3rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}
.legal-container h1 {
    color: var(--text-dark);
}
.legal-container h2 {
    color: var(--primary-color);
}
.legal-container p, .legal-container li {
    color: var(--text-muted);
}

/* ==========================================================================
   13. LIVE CHAT SIMULATOR (Light theme)
   ========================================================================== */
.live-chat { position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 1001; }
.chat-bubble {
    width: auto;
    height: 60px;
    background: var(--primary-color);
    border-radius: 30px;
    display: flex;
    align-items: center;
    padding: 0 20px;
    gap: 10px;
    color: white;
    font-family: var(--font-primary);
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 90, 156, 0.3);
    transition: var(--transition-smooth);
}
.chat-bubble:hover { transform: scale(1.05); }
.chat-bubble i { font-size: 1.5rem; }
.chat-window {
    width: 350px;
    height: 480px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
    border: 1px solid var(--border-color);
    position: absolute;
    bottom: 80px; right: 0;
    display: flex; flex-direction: column;
    transform: scale(0.9) translateY(20px) rotateX(-10deg);
    opacity: 0;
    transform-origin: bottom right;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    visibility: hidden;
}
.live-chat.active .chat-window { transform: scale(1) translateY(0) rotateX(0deg); opacity: 1; visibility: visible; }
.live-chat.active .chat-bubble { transform: scale(0); }
.chat-header {
    background: var(--primary-color);
    color: white;
    padding: 1rem;
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
    display: flex; justify-content: space-between; align-items: center;
}
.chat-header-info { display: flex; align-items: center; gap: 0.75rem; }
.chat-header h3 { font-size: 1.1rem; color: white; }
.chat-header button { background: none; border: none; color: white; font-size: 1.5rem; cursor: pointer; opacity: 0.8; }
.chat-header button:hover { opacity: 1; }
.chat-body { flex-grow: 1; padding: 1rem; overflow-y: auto; background: #f9f9f9; }
.message { margin-bottom: 1rem; max-width: 80%; }
.message p { padding: 0.75rem 1rem; border-radius: 18px; font-size: 0.9rem; line-height: 1.5; }
.message.bot { align-self: flex-start; }
.message.bot p { background: #e9ecef; color: var(--text-dark); border-bottom-left-radius: 4px; }
.message.user { margin-left: auto; }
.message.user p { background: var(--primary-color); color: white; border-bottom-right-radius: 4px; }
.chat-footer {
    padding: 0.75rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 0.5rem;
}
#chat-input {
    flex-grow: 1;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
}
#chat-input:focus { outline: none; border-color: var(--primary-color); }
#send-chat-btn {
    background: var(--primary-color);
    border: none;
    color: white;
    width: 40px; height: 40px;
    border-radius: 50%;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-smooth);
}
#send-chat-btn:hover { background-color: var(--primary-color-dark); }
/* ==========================================================================
   14. ANIMATIONS & EFFECTS
   ========================================================================== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}
.animate-fade-in-down { animation: fadeInDown 1s ease-out forwards; }
.animate-fade-in-up { animation: fadeInUp 1s 0.2s ease-out forwards; opacity: 0; }
.animate-fade-in { animation: fadeIn 1.2s 0.4s ease-out forwards; opacity: 0; }
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; } to { opacity: 1; }
}

/* ==========================================================================
   15. RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */
@media screen and (max-width: 992px) {
    .nav__menu {
        position: fixed; top: 0; right: -100%;
        width: 70%; height: 100%;
        background-color: white;
        z-index: 100;
        transition: right 0.4s ease-in-out;
        padding: 6rem 2rem 2rem;
        box-shadow: -10px 0 20px rgba(0,0,0,0.1);
    }
    .nav__menu.show-menu { right: 0; }
    .nav__list { flex-direction: column; gap: 3rem; align-items: flex-start; }
    .nav__toggle, .nav__close { display: block; }
    .nav__close { position: absolute; top: 1.5rem; right: 1.5rem; }
    .nav__actions .button { display: none; }
    
    .hero__container { grid-template-columns: 1fr; text-align: center; gap: 4rem; }
    .hero__data { max-width: 100%; }
    .hero__buttons { justify-content: center; }
    .hero__image-wrapper { grid-row: 1; }

    .about__container { grid-template-columns: 1fr; gap: 3rem; }
    .about__data .section-title, .about__data .section-subtitle { text-align: center; }
    
    .pricing__grid { grid-template-columns: 1fr; max-width: 450px; margin: 3rem auto 0; }
    .pricing-card.featured { transform: scale(1); }
    
    .roi-calculator { grid-template-columns: 1fr; }
    
    .cta__container { flex-direction: column; text-align: center; }
    .footer__container { grid-template-columns: 1fr 1fr; }
    .footer__col--about { grid-column: 1 / -1; }
}

@media screen and (max-width: 768px) {
    .section { padding: 4rem 0; }
    .process__timeline::after { left: 30px; }
    .timeline__item { width: 100%; padding-left: 70px; padding-right: 15px; }
    .timeline__item:nth-child(odd), .timeline__item:nth-child(even) { left: 0; padding-left: 80px; padding-right: 1rem; }
    .timeline__item:nth-child(odd) .timeline__content,
    .timeline__item:nth-child(even) .timeline__content { text-align: left; }
    .timeline__icon { left: 5px; }
    .timeline__item:nth-child(even) .timeline__icon { left: 5px; }

    .testimonial-slide { grid-template-columns: 1fr; text-align: center; gap: 1rem; }
    .testimonial__img { margin: 0 auto; }
}

@media screen and (max-width: 576px) {
    .hero__buttons { flex-direction: column; align-items: center; }
    .about__stats-wrapper { grid-template-columns: 1fr; }
    .footer__container { grid-template-columns: 1fr; text-align: center; }
    .footer__socials, .footer__contact { justify-content: center; }
    .footer__bottom-container { flex-direction: column; gap: 1rem; }
}