/* ===================
   1. CSS Variables
   =================== */
:root {
    /* Brand Colors */
    --color-red: #E53935;
    --color-green: #43A047;
    --color-blue: #1E88E5;
    --color-dark: #333333;

    /* Neutral Palette */
    --color-white: #FFFFFF;
    --color-light-gray: #F8F9FA;
    --color-medium-gray: #E9ECEF;
    --color-text-gray: #6C757D;
    --color-text: #555555;

    /* Spacing */
    --section-padding: 48px;
    --container-max-width: 1200px;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

/* ===================
   2. Reset & Base
   =================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-white);
}

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

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

a:hover {
    color: #1565C0;
}

ul {
    list-style: none;
}

/* ===================
   3. Typography
   =================== */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-dark);
    line-height: 1.3;
    font-weight: 600;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.25rem;
}

h4 {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

p {
    margin-bottom: 1rem;
}

.lead {
    font-size: 1.25rem;
    color: var(--color-text-gray);
}

/* ===================
   4. Layout Utilities
   =================== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section-title {
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-gray);
    max-width: 600px;
    margin: 0 auto 2rem;
}

/* ===================
   5. Buttons
   =================== */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover {
    background-color: #1565C0;
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(30, 136, 229, 0.3);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

/* ===================
   6. Header & Navigation
   =================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--color-white);
    transition: box-shadow var(--transition-normal);
}

.site-header.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 16px 20px;
}

.logo img {
    height: 56px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--color-dark);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--color-blue);
}

.nav-links .btn {
    padding: 10px 20px;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-dark);
    position: relative;
    transition: background-color var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 24px;
    height: 2px;
    background-color: var(--color-dark);
    transition: transform var(--transition-fast);
}

.hamburger::before {
    top: -7px;
}

.hamburger::after {
    top: 7px;
}

.mobile-menu-toggle.active .hamburger {
    background-color: transparent;
}

.mobile-menu-toggle.active .hamburger::before {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active .hamburger::after {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===================
   7. Hero Section
   =================== */
.hero-section {
    padding: 100px 0 24px;
    background-color: var(--color-light-gray);
    min-height: 35vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 700px;
}

.hero-content h1 {
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-gray);
    margin-bottom: 2rem;
}

/* ===================
   8. Services Section
   =================== */
.services-section {
    padding: var(--section-padding) 0;
    background-color: var(--color-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--color-white);
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    transition: all var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.service-icon-red {
    background-color: rgba(229, 57, 53, 0.1);
    color: var(--color-red);
}

.service-icon-green {
    background-color: rgba(67, 160, 71, 0.1);
    color: var(--color-green);
}

.service-icon-blue {
    background-color: rgba(30, 136, 229, 0.1);
    color: var(--color-blue);
}

.service-icon-dark {
    background-color: rgba(51, 51, 51, 0.1);
    color: var(--color-dark);
}

.service-icon-lavender {
    background-color: rgba(167, 139, 250, 0.1);
    color: #a78bfa;
}

.service-icon-orange {
    background-color: rgba(251, 146, 60, 0.1);
    color: #fb923c;
}

.service-card h3 {
    margin-bottom: 12px;
}

.service-card p {
    color: var(--color-text-gray);
    margin-bottom: 0;
}

/* ===================
   9. About Section
   =================== */
.about-section {
    padding: var(--section-padding) 0;
    background-color: var(--color-light-gray);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content .section-title {
    margin-bottom: 1.5rem;
}

.about-values {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-top: 32px;
    flex-wrap: wrap;
}

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

.value-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-blue);
}

.value-label {
    color: var(--color-text-gray);
    font-size: 0.9rem;
}

/* ===================
   10. Process Section
   =================== */
.process-section {
    padding: var(--section-padding) 0;
    background-color: var(--color-white);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

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

.step-number {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-white);
    margin: 0 auto 20px;
}

.step-red {
    background-color: var(--color-red);
}

.step-green {
    background-color: var(--color-green);
}

.step-blue {
    background-color: var(--color-blue);
}

.step-dark {
    background-color: var(--color-dark);
}

.process-step h3 {
    margin-bottom: 12px;
}

.process-step p {
    color: var(--color-text-gray);
    margin-bottom: 0;
}

/* ===================
   11. Testimonials Section
   =================== */
.testimonials-section {
    padding: var(--section-padding) 0;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.testimonial-card {
    background: var(--color-light-gray);
    padding: 32px;
    border-radius: 12px;
}

.testimonial-card blockquote {
    margin-bottom: 24px;
}

.testimonial-card blockquote p {
    font-style: italic;
    color: var(--color-text);
    margin-bottom: 0;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-info strong {
    display: block;
    color: var(--color-dark);
}

.author-info span {
    font-size: 0.875rem;
    color: var(--color-text-gray);
}

/* ===================
   12. Contact Section
   =================== */
.contact-section {
    padding: var(--section-padding) 0;
    background-color: var(--color-light-gray);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-top: 32px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-item svg {
    color: var(--color-blue);
    flex-shrink: 0;
    margin-top: 4px;
}

.contact-item strong {
    display: block;
    color: var(--color-dark);
    margin-bottom: 4px;
}

.contact-item a,
.contact-item span {
    color: var(--color-text-gray);
}

/* Contact Form */
.contact-form {
    background: var(--color-white);
    padding: 32px;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    font-family: inherit;
    border: 1px solid var(--color-medium-gray);
    border-radius: 6px;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-blue);
    box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.1);
}

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

.contact-form .btn {
    width: 100%;
}

/* ===================
   13. Footer
   =================== */
.site-footer {
    background-color: var(--color-white);
    color: var(--color-dark);
    padding: 48px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 32px;
    margin-bottom: 32px;
}

.footer-brand p {
    color: var(--color-text-gray);
    margin-top: 16px;
    margin-bottom: 0;
}

.footer-links h4 {
    color: var(--color-dark);
    margin-bottom: 16px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-links a {
    color: var(--color-text-gray);
}

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

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--color-medium-gray);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-gray);
    font-size: 0.875rem;
    margin-bottom: 0;
}

/* ===================
   14. Animations
   =================== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================
   15. Media Queries
   =================== */

/* Tablet */
@media (max-width: 992px) {
    :root {
        --section-padding: 40px;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

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

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

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

/* Mobile */
@media (max-width: 768px) {
    :root {
        --section-padding: 32px;
    }

    h1 {
        font-size: 1.75rem;
    }

    /* Mobile Navigation */
    .mobile-menu-toggle {
        display: block;
        z-index: 1001;
    }

    .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--color-white);
        flex-direction: column;
        justify-content: center;
        gap: 24px;
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-normal), visibility var(--transition-normal);
    }

    .nav-links.active {
        opacity: 1;
        visibility: visible;
    }

    .nav-links a {
        font-size: 1.25rem;
    }

    /* Hero */
    .hero-section {
        padding-top: 120px;
        min-height: auto;
    }

    /* About Values */
    .about-values {
        gap: 32px;
    }

    .value-number {
        font-size: 2rem;
    }

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .services-grid,
    .process-steps,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .about-values {
        flex-direction: column;
        gap: 24px;
    }
}