/* ===== CSS VARIABLES ===== */
:root {
    /* Colors */
    --primary-color: #1a4d2e;
    --primary-dark: #0f3019;
    --secondary-color: #f77f00;
    --accent-color: #d62828;
    --text-color: #2d3748;
    --text-light: #718096;
    --bg-color: #ffffff;
    --bg-light: #f7fafc;
    --bg-dark: #1a202c;
    --border-color: #e2e8f0;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Montserrat', var(--font-primary);

    /* Font Sizes - Mobile First */
    --h1-size: 2rem;
    --h2-size: 1.75rem;
    --h3-size: 1.25rem;
    --normal-size: 1rem;
    --small-size: 0.875rem;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Layout */
    --container-width: 1140px;
    --header-height: 4rem;

    /* Transitions */
    --transition: all 0.3s ease;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.1);

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
}

/* Desktop Font Sizes */
@media screen and (min-width: 768px) {
    :root {
        --h1-size: 3rem;
        --h2-size: 2.25rem;
        --h3-size: 1.5rem;
        --normal-size: 1.125rem;
    }
}

/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-primary);
    font-size: var(--normal-size);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--primary-dark);
}

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

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

ul {
    list-style: none;
}

button {
    font-family: inherit;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

/* ===== UTILITY CLASSES ===== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

@media screen and (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

.section {
    padding: var(--spacing-xxl) 0;
}

@media screen and (min-width: 768px) {
    .section {
        padding: 5rem 0;
    }
}

.section__subtitle {
    display: block;
    font-size: var(--small-size);
    font-weight: 600;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xs);
}

.section__title {
    font-size: var(--h2-size);
    margin-bottom: var(--spacing-md);
    max-width: 600px;
}

.section__description {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
}

.highlight {
    color: var(--secondary-color);
    position: relative;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--normal-size);
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

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

.btn-light:hover {
    background-color: var(--bg-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-full {
    width: 100%;
}

/* ===== HEADER & NAVIGATION ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

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

.nav__logo img {
    width: 150px;
    height: auto;
}

.nav__menu {
    position: fixed;
    top: var(--header-height);
    right: -100%;
    width: 80%;
    height: calc(100vh - var(--header-height));
    background-color: white;
    padding: var(--spacing-lg);
    transition: right 0.4s;
    box-shadow: var(--shadow-lg);
}

.nav__menu.show {
    right: 0;
}

.nav__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.nav__link {
    color: var(--text-color);
    font-weight: 500;
    padding: var(--spacing-xs);
    display: block;
    transition: var(--transition);
}

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

.nav__toggle {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    cursor: pointer;
    z-index: 1001;
}

.nav__toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

/* Desktop Navigation */
@media screen and (min-width: 768px) {
    .nav__logo img {
        width: 180px;
    }

    .nav__menu {
        position: static;
        width: auto;
        height: auto;
        background-color: transparent;
        padding: 0;
        box-shadow: none;
    }

    .nav__list {
        flex-direction: row;
        gap: var(--spacing-lg);
    }

    .nav__toggle {
        display: none;
    }
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    position: relative;
}

.hero__container {
    display: grid;
    gap: var(--spacing-xl);
    align-items: center;
    padding: var(--spacing-xl) 0;
}

.hero__title {
    font-size: var(--h1-size);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero__description {
    color: var(--text-light);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
}

.hero__buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.hero__image {
    order: -1;
}

.hero__image img {
    width: 100%;
    height: auto;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

.hero__scroll {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
}

.scroll-down {
    width: 30px;
    height: 50px;
    border: 2px solid var(--primary-color);
    border-radius: 50px;
    display: flex;
    justify-content: center;
    padding-top: 10px;
}

.scroll-down span {
    width: 4px;
    height: 10px;
    background-color: var(--primary-color);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% {
        opacity: 0;
        transform: translateY(-10px);
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translateY(10px);
    }
}

@media screen and (min-width: 768px) {
    .hero__container {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xxl);
    }

    .hero__image {
        order: 1;
    }
}

/* ===== STATS SECTION ===== */
.stats {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-xl) 0;
}

.stats__container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    text-align: center;
}

.stat__number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-xs);
}

.stat__label {
    font-size: var(--small-size);
    opacity: 0.9;
}

@media screen and (min-width: 768px) {
    .stats__container {
        grid-template-columns: repeat(4, 1fr);
    }

    .stat__number {
        font-size: 3rem;
    }
}

/* ===== ABOUT SECTION ===== */
.about__container {
    display: grid;
    gap: var(--spacing-xl);
    align-items: center;
}

.about__image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about__description {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.about__list {
    margin: var(--spacing-lg) 0;
    display: grid;
    gap: var(--spacing-sm);
}

.about__list-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.about__icon {
    color: var(--primary-color);
    flex-shrink: 0;
}

@media screen and (min-width: 768px) {
    .about__container {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xxl);
    }
}

/* ===== SERVICES SECTION ===== */
.services {
    background-color: var(--bg-light);
}

.services__grid {
    display: grid;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.service__card {
    background-color: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.service__card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.service__icon {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.service__title {
    font-size: var(--h3-size);
    margin-bottom: var(--spacing-sm);
}

.service__description {
    color: var(--text-light);
}

@media screen and (min-width: 576px) {
    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (min-width: 992px) {
    .services__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ===== SOLUTIONS SECTION ===== */
.solutions__content {
    display: grid;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.solution__item {
    position: relative;
    padding-left: var(--spacing-xl);
}

.solution__number {
    position: absolute;
    left: 0;
    top: 0;
    font-size: 2rem;
    font-weight: 800;
    color: var(--secondary-color);
    opacity: 0.2;
}

.solution__title {
    font-size: var(--h3-size);
    margin-bottom: var(--spacing-sm);
}

.solution__description {
    color: var(--text-light);
}

@media screen and (min-width: 768px) {
    .solutions__content {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xxl);
    }
}

/* ===== CTA SECTION ===== */
.cta {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    color: white;
}

.cta__container {
    text-align: center;
}

.cta__title {
    font-size: var(--h2-size);
    color: white;
    margin-bottom: var(--spacing-md);
}

.cta__description {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== CONTACT SECTION ===== */
.contact__content {
    display: grid;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.contact__info {
    display: grid;
    gap: var(--spacing-lg);
}

.contact__info-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
}

.contact__icon {
    color: var(--primary-color);
    flex-shrink: 0;
}

.contact__info-title {
    font-size: var(--small-size);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-light);
}

.contact__info-detail {
    color: var(--text-color);
    font-weight: 500;
}

.contact__info-detail:hover {
    color: var(--primary-color);
}

.contact__form {
    display: grid;
    gap: var(--spacing-md);
}

.form__group {
    display: flex;
    flex-direction: column;
}

.form__label {
    font-size: var(--small-size);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-color);
}

.form__input,
.form__textarea {
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: var(--normal-size);
    transition: var(--transition);
}

.form__input:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 77, 46, 0.1);
}

.form__textarea {
    resize: vertical;
    min-height: 120px;
}

@media screen and (min-width: 768px) {
    .contact__form {
        grid-template-columns: repeat(2, 1fr);
    }

    .form__group-full {
        grid-column: 1 / -1;
    }
}

@media screen and (min-width: 992px) {
    .contact__content {
        grid-template-columns: 1fr 2fr;
        gap: var(--spacing-xxl);
    }
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--bg-dark);
    color: white;
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer__content {
    display: grid;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer__logo {
    margin-bottom: var(--spacing-md);
}

.footer__description {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--small-size);
}

.footer__title {
    font-size: 1.125rem;
    color: white;
    margin-bottom: var(--spacing-md);
}

.footer__links {
    display: grid;
    gap: var(--spacing-sm);
}

.footer__link {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--small-size);
    transition: var(--transition);
}

.footer__link:hover {
    color: var(--secondary-color);
    padding-left: 5px;
}

.footer__social {
    display: flex;
    gap: var(--spacing-sm);
}

.footer__social-link {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.footer__bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
}

.footer__copy {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--small-size);
}

.footer__legal {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.footer__legal-link {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--small-size);
    transition: var(--transition);
}

.footer__legal-link:hover {
    color: white;
}

@media screen and (min-width: 576px) {
    .footer__content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media screen and (min-width: 992px) {
    .footer__content {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }

    .footer__bottom {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

/* ===== BACK TO TOP BUTTON ===== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
}

/* ===== ANIMATIONS ===== */
@media (prefers-reduced-motion: no-preference) {
    .fade-in {
        animation: fadeIn 0.6s ease-in;
    }

    @keyframes fadeIn {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}

/* ===== ACCESSIBILITY ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus Styles */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===== PRINT STYLES ===== */
@media print {
    .header,
    .nav__toggle,
    .back-to-top,
    .hero__scroll {
        display: none;
    }

    .section {
        page-break-inside: avoid;
    }
}