/* --- Root Variables & Base Styles --- */
:root {
    --electric-blue: #007BFF;
    --deep-indigo: #1A237E;
    --silver: #E0E0E0;
    --soft-blue: #F0F7FF;
    --white: #FFFFFF;
    --gray-900: #121212;
    --gray-700: #424242;
    --gray-500: #757575;
    --font-family: 'Poppins', sans-serif;
    --transition-speed: 0.3s;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    background-color: var(--white);
    color: var(--gray-700);
    line-height: 1.6;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

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

a:hover {
    color: var(--deep-indigo);
}

ul {
    list-style: none;
}

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

.section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    color: var(--gray-900);
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--gray-500);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: transform var(--transition-speed) ease, background-color var(--transition-speed) ease;
}

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

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

.btn-secondary {
    background-color: var(--white);
    color: var(--electric-blue);
    border: 1px solid var(--electric-blue);
}

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

/* --- Preloader (NEW) --- */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--white);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
    overflow: hidden;
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--silver);
    border-top-color: var(--electric-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* --- Header & Navigation --- */
.header {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.header-spacer {
    height: 90px;
    /* matches or slightly exceeds .header height for all breakpoints */
    width: 100%;
    display: block;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo img {
    height: 55px;
    width: auto;
    max-width: 207px;
    object-fit: contain;
}

/* Fallback text logo if image fails to load */
.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--deep-indigo);
    display: none;
}

.logo:not(:has(img)) .logo-text {
    display: block;
}

.nav-menu {
    display: flex;
    gap: 25px;
}

.nav-link {
    font-weight: 500;
    color: var(--gray-700);
    padding: 5px;
}

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--gray-900);
    transition: all var(--transition-speed) ease-in-out;
}

/* --- Hero Section --- */
.hero-section {
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 3rem;
}

.hero-title {
    font-size: 3rem;
    line-height: 1.2;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--gray-500);
    margin-bottom: 2rem;
}

.hero-image {
    border-radius: 15px;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% {
        transform: translateY(0px) translateX(0px) rotate(0deg);
    }

    25% {
        transform: translateY(-10px) translateX(5px) rotate(1deg);
    }

    50% {
        transform: translateY(-5px) translateX(-8px) rotate(-1deg);
    }

    75% {
        transform: translateY(-15px) translateX(3px) rotate(0.5deg);
    }

    100% {
        transform: translateY(0px) translateX(0px) rotate(0deg);
    }
}

/* --- Why Us Section --- */
.why-us-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
}

.why-us-content .section-title,
.why-us-content .section-subtitle {
    text-align: left;
    margin-left: 0;
    margin-right: 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.stat-item h3 {
    font-size: 2.2rem;
    color: var(--electric-blue);
    line-height: 1.1;
}

.stat-item p {
    color: var(--gray-500);
    font-weight: 500;
}

/* --- Use Cases Section (REDESIGNED) --- */
.use-case-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.use-case-card {
    background-color: var(--white);
    padding: 25px;
    border-radius: 10px;
    border: 1px solid var(--silver);
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.use-case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.07);
}

.use-case-icon {
    margin-bottom: 1rem;
}

.use-case-icon img {
    width: 40px;
    height: 40px;
}

.use-case-card h4 {
    color: var(--deep-indigo);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

/* --- How It Works Section --- */
.how-it-works-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.step-icon {
    width: 60px;
    height: 60px;
    background-color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.1);
}

.step-icon img {
    width: 28px;
    height: 28px;
}

.step h3 {
    margin-bottom: 0.5rem;
    color: var(--gray-900);
}

/* --- FAQ Section --- */
.faq-accordion {
    max-width: 750px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--silver);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    font-size: 1.1rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    color: var(--gray-900);
}

.faq-icon {
    font-size: 1.5rem;
    font-weight: 400;
    transition: transform var(--transition-speed) ease;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-speed) ease-out;
}

.faq-answer p {
    padding: 0 0 20px 0;
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

/* --- CTA Section --- */
.cta-section {
    background-color: var(--deep-indigo);
    padding: 60px 0;
    text-align: center;
    color: var(--white);
}

.cta-title {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.cta-subtitle {
    color: var(--silver);
    margin-bottom: 1.5rem;
}

.cta-section .btn-secondary {
    background-color: var(--white);
    border-color: var(--white);
    color: var(--electric-blue);
}

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

/* --- Footer --- */
.footer {
    background-color: var(--gray-900);
    color: var(--silver);
    padding: 60px 0 20px;
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer .logo {
    color: var(--white);
    margin-bottom: 1rem;
    display: inline-flex;
    align-items: center;
}

.footer .logo img {
    height: 48px;
    width: auto;
    max-width: 165px;
    object-fit: contain;
    filter: brightness(0) invert(1);
}

.footer .logo-text {
    color: var(--white);
    font-size: 1.3rem;
    font-weight: 700;
    display: none;
}

.footer .logo:not(:has(img)) .logo-text {
    display: block;
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: 1rem;
}

.footer-col ul li {
    margin-bottom: 0.5rem;
}

.footer-col a,
.footer-col p {
    color: var(--silver);
    font-size: 0.95rem;
}

.footer-col a:hover {
    color: var(--white);
}

.social-icons {
    display: flex;
    gap: 15px;
    margin-top: 1rem;
}

.social-icons img {
    width: 24px;
    height: 24px;
    transition: transform 0.2s ease;
}

.social-icons a:hover img {
    transform: scale(1.1);
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid var(--gray-700);
    padding-top: 20px;
    font-size: 0.9rem;
}

/* --- Scroll Animations --- */
.animate-on-scroll {
    opacity: 0;
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    transition-delay: var(--animation-delay, 0ms);
    will-change: opacity, transform;
}

.fade-in.is-visible {
    opacity: 1;
}

.fade-in-up {
    transform: translateY(20px);
    opacity: 0;
}

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

.slide-from-left {
    transform: translateX(-20px);
    opacity: 0;
}

.slide-from-left.is-visible {
    transform: translateX(0);
    opacity: 1;
}

.slide-from-right {
    transform: translateX(20px);
    opacity: 0;
}

.slide-from-right.is-visible {
    transform: translateX(0);
    opacity: 1;
}

.scale-in {
    transform: scale(0.9);
    opacity: 0;
}

.scale-in.is-visible {
    transform: scale(1);
    opacity: 1;
}

/* --- Media Queries (Mobile First) --- */
@media (max-width: 992px) {
    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 2rem;
    }

    /* Logo responsive adjustments for tablets */
    .logo img {
        height: 48px;
        max-width: 179px;
    }

    .footer .logo img {
        height: 42px;
        max-width: 138px;
    }

    .hero-container,
    .why-us-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-content {
        order: 2;
    }

    .hero-image-container {
        order: 1;
    }

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

    .why-us-content .section-title,
    .why-us-content .section-subtitle {
        text-align: center;
        margin-left: auto;
        margin-right: auto;
    }

    .why-us-image {
        order: 1;
    }

    .why-us-content {
        order: 2;
    }

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

    .use-case-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {

    /* Logo responsive adjustments for mobile */
    .logo img {
        height: 48px;
        max-width: 173px;
    }

    .footer .logo img {
        height: 39px;
        max-width: 141px;
    }

    /* Reduce animation intensity on mobile */
    .fade-in-up {
        transform: translateY(10px);
        /* Further reduced for mobile */
    }

    .slide-from-left {
        transform: translateX(-10px);
        /* Further reduced for mobile */
    }

    .slide-from-right {
        transform: translateX(10px);
        /* Further reduced for mobile */
    }

    .scale-in {
        transform: scale(0.95);
        /* Further reduced for mobile */
    }

    .navbar {
        height: 60px;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 60px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        height: 100vh;
        text-align: center;
        transition: left var(--transition-speed) ease;
        gap: 0;
    }

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

    .nav-item {
        margin: 16px 0;
    }

    .nav-link {
        font-size: 1.2rem;
    }

    .hamburger {
        display: block;
    }

    .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);
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .stats-grid,
    .how-it-works-grid {
        grid-template-columns: 1fr;
    }

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

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

    .header-spacer {
        height: 70px;
    }
}

@media (max-width: 480px) {

    /* Logo responsive adjustments for small mobile */
    .logo img {
        height: 45px;
        max-width: 141px;
    }

    .footer .logo img {
        height: 31px;
        max-width: 110px;
    }

    .navbar {
        height: 55px;
    }

    .nav-menu {
        top: 55px;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .header-spacer {
        height: 60px;
    }
}