/*
================================================
TABLE OF CONTENTS
================================================
1.  :root Variables & General Styles
2.  Header & Navigation
3.  Hero Section
4.  Core Service Pillars Section
5.  Growth Flywheel Section
6.  Technology Section
7.  Testimonials Section
8.  Final CTA Section
9.  Footer
10. Sub-Page Styles (Contact, Legal)
11. Animations & Keyframes
12. Responsive Media Queries
================================================
*/

/* 1. :root Variables & General Styles */
:root {
    --color-primary: #1D1D1F;
    /* Charcoal Black */
    --color-accent: #CFFF04;
    /* Electric Lime */
    --color-background: #F5F5F7;
    /* Off-white */
    --color-background-alt: #FFFFFF;
    --color-text: #555;
    --color-border: #E5E5E5;

    --font-main: 'Inter', sans-serif;

    --header-height: 90px;
    --border-radius: 4px;
    --transition-speed: 0.3s;
    --section-padding: 120px 0;
}

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

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

body {
    background-color: var(--color-background);
    color: var(--color-text);
    font-family: var(--font-main);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

h1,
h2,
h3,
h4 {
    font-family: var(--font-main);
    color: var(--color-primary);
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(3rem, 6vw, 5rem);
    letter-spacing: -0.04em;
}

h2 {
    font-size: 2.8rem;
    letter-spacing: -0.03em;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section-padding {
    padding: var(--section-padding);
}

.highlight {
    color: var(--color-accent);
    -webkit-text-stroke: 1px var(--color-primary);
}

.subtitle {
    display: block;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 1rem;
}

.cta-button {
    display: inline-block;
    padding: 16px 36px;
    background-color: var(--color-accent);
    color: var(--color-primary);
    font-weight: 600;
    border: 2px solid var(--color-primary);
    border-radius: 50px;
    transition: all var(--transition-speed) ease;
    box-shadow: 4px 4px 0px var(--color-primary);
}

.cta-button:hover {
    background-color: var(--color-primary);
    color: var(--color-accent);
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0px var(--color-primary);
}

/* 2. Header & Navigation */
#main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all var(--transition-speed) ease;
    height: var(--header-height);
    display: flex;
    align-items: center;
    border-bottom: 1px solid transparent;
}

#main-header.scrolled {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

#main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-text {
    color: var(--color-primary);
    font-size: 1.75rem;
    font-weight: 700;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-link {
    color: var(--color-primary);
    font-weight: 600;
    position: relative;
    padding: 5px 0;
}

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

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

#hamburger-btn {
    display: none;
    background: none;
    border: none;
    z-index: 1001;
}

#hamburger-btn .bar {
    display: block;
    width: 25px;
    height: 2px;
    margin: 6px auto;
    background-color: var(--color-primary);
    transition: all 0.3s ease-in-out;
}

/* 3. Hero Section */
#hero {
    padding-top: calc(var(--header-height) + 60px);
    padding-bottom: 60px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
}

.hero-content {
    max-width: 750px;
}

#hero h1 {
    margin-bottom: 1.5rem;
}

#hero p {
    font-size: 1.2rem;
    max-width: 500px;
    margin-bottom: 2.5rem;
}

/* 4. Core Service Pillars Section */
#services {
    background-color: var(--color-background-alt);
}

.section-title {
    margin-bottom: 4rem;
    max-width: 500px;
}

.pillars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1px;
    background-color: var(--color-border);
    border: 1px solid var(--color-border);
}

.pillar-card {
    background-color: var(--color-background-alt);
    padding: 2.5rem;
}

.pillar-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 1rem;
    margin-bottom: 1rem;
}

.pillar-header h3 {
    font-size: 2rem;
}

.pillar-header span {
    font-weight: 600;
}

.pillar-card p {
    font-size: 1.1rem;
}

/* 5. Growth Flywheel Section */
#approach {
    background-color: var(--color-primary);
    color: var(--color-background);
}

#approach h2,
#approach p,
#approach .subtitle {
    color: var(--color-background);
}

#approach .section-title p {
    color: rgba(245, 245, 247, 0.8);
}

.flywheel-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    align-items: center;
    gap: 2rem;
    margin-top: 4rem;
}

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

.flywheel-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1.5rem;
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.flywheel-icon span {
    font-size: 1.5rem;
    font-weight: 700;
}

.flywheel-step h3 {
    color: #fff;
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.flywheel-arrow {
    display: none;
    font-size: 2rem;
    color: var(--color-accent);
    text-align: center;
}

/* 6. Technology Section */
#technology {
    background-color: var(--color-background-alt);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1px;
    background-color: var(--color-border);
    border: 1px solid var(--color-border);
    margin-top: 4rem;
}

.tech-logo {
    height: 100px;
    background-color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-speed) ease;
}

.tech-logo span {
    font-weight: 600;
    color: var(--color-primary);
}

.tech-logo:hover {
    background-color: var(--color-accent);
}

/* 7. Testimonials Section */
.testimonial-wrapper {
    background-color: var(--color-background-alt);
    padding: 4rem;
    display: grid;
    align-items: center;
}

.testimonial-slider {
    position: relative;
    min-height: 200px;
}

.testimonial-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease;
}

.testimonial-slide.active {
    opacity: 1;
    visibility: visible;
    position: relative;
}

.quote {
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.6;
    color: var(--color-primary);
    margin-bottom: 2rem;
}

.author h4 {
    font-size: 1.1rem;
    margin: 0;
}

.author span {
    color: var(--color-text);
}

.slider-controls {
    margin-top: 2rem;
}

.slider-controls button {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: none;
    color: var(--color-primary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    margin-right: 1rem;
}

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

/* 8. Final CTA Section */
#final-cta {
    background-color: var(--color-accent);
    padding: var(--section-padding);
}

#final-cta .container {
    text-align: center;
}

#final-cta h2 {
    font-size: 3.5rem;
}

#final-cta p {
    max-width: 600px;
    margin: 1rem auto 2.5rem;
    font-size: 1.1rem;
}

/* 9. Footer */
#main-footer {
    background-color: var(--color-background-alt);
    padding: 80px 0 0;
    border-top: 1px solid var(--color-border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 2rem;
    padding-bottom: 40px;
}

.footer-col h4 {
    color: var(--color-primary);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-col a,
.footer-col li {
    color: var(--color-text);
}

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

/* 10. Sub-Page Styles */
.page-header {
    padding-top: calc(var(--header-height) + 80px);
    padding-bottom: 40px;
}

#contact-page .contact-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px;
    background-color: var(--color-background-alt);
    border: 1px solid var(--color-border);
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: 1px solid var(--color-primary);
}

.contact-info-wrapper h3 {
    margin-bottom: 1rem;
}

.contact-item {
    margin-bottom: 1.5rem;
}

.contact-item h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.legal-content .container {
    max-width: 800px;
}

.legal-content h2 {
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.5rem;
}

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

/* 11. Animations & Keyframes */
.animate-on-load {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn-up 0.8s ease forwards;
}

#hero .animate-on-load:nth-child(1) {
    animation-delay: 0.2s;
}

#hero .animate-on-load:nth-child(2) {
    animation-delay: 0.4s;
}

#hero .animate-on-load:nth-child(3) {
    animation-delay: 0.6s;
}

.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);
}

.pillar-card:nth-child(2),
.flywheel-step:nth-child(2) {
    transition-delay: 0.1s;
}

.pillar-card:nth-child(3),
.flywheel-step:nth-child(3) {
    transition-delay: 0.2s;
}

@keyframes fadeIn-up {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 12. Responsive Media Queries */
@media (min-width: 769px) {
    .flywheel-arrow {
        display: block;
    }
}

@media (max-width: 992px) {
    #main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 60%;
        max-width: 300px;
        height: 100vh;
        background-color: #fff;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: right 0.4s ease-in-out;
        box-shadow: -10px 0 20px rgba(0, 0, 0, 0.1);
    }

    #main-nav.is-active {
        right: 0;
    }

    .nav-links {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }

    .header-cta {
        display: none;
    }

    #hamburger-btn {
        display: block;
        z-index: 1001;
    }

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

    #footer-brand {
        grid-column: 1 / -1;
    }

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

@media (max-width: 768px) {
    .flywheel-grid {
        grid-template-columns: 1fr;
    }

    .testimonial-wrapper {
        padding: 2rem;
    }

    .quote {
        font-size: 1.2rem;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

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