/* ===== CSS RESET ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===== CSS VARIABLES ===== */
:root {
    /* Colors */
    --primary-color: #FF6B35;
    --primary-dark: #E55A2B;
    --primary-light: #FF8A5B;
    --text-dark: #2C3E50;
    --text-light: #7F8C8D;
    --text-white: #FFFFFF;
    --bg-white: #FFFFFF;
    --bg-light: #F8F9FA;
    --bg-dark: #2C3E50;
    --border-light: #E9ECEF;
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.15);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-base: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Layout */
    --container-max-width: 1200px;
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
    --transition: all 0.3s ease;
    --header-height: 80px;
}

/* ===== BASE STYLES ===== */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

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

.text-accent {
    color: var(--primary-color);
}

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

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

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

.btn--primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 107, 53, 0.3);
}

.btn--outline {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn--outline:hover {
    background-color: var(--primary-color);
    color: var(--text-white);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 107, 53, 0.3);
}

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

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: var(--transition);
}

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

.nav__logo {
    height: 40px;
    width: auto;
}

.nav__menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

.nav__link {
    font-weight: var(--font-weight-medium);
    color: var(--text-dark);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
}

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

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav__toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    transition: var(--transition);
}

/* ===== SECTIONS ===== */
.section__header {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
}

.section__title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-dark);
    margin-bottom: var(--spacing-base);
}

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== HERO SECTION ===== */
.hero {
    padding: calc(var(--header-height) + var(--spacing-4xl)) 0 var(--spacing-4xl);
    background: linear-gradient(135deg, var(--bg-white) 0%, var(--bg-light) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

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

.hero__title {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-dark);
    margin-bottom: var(--spacing-xl);
    line-height: 1.2;
}

.hero__description {
    font-size: var(--font-size-xl);
    color: var(--text-light);
    margin-bottom: var(--spacing-3xl);
    line-height: 1.6;
}

.hero__actions {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== ABOUT SECTION ===== */
.about {
    padding: var(--spacing-4xl) 0;
    background-color: var(--bg-white);
}

.about__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-3xl);
}

.about__card {
    text-align: center;
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    background-color: var(--bg-light);
    transition: var(--transition);
}

.about__card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px var(--shadow-medium);
}

.about__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background-color: var(--primary-color);
    color: var(--text-white);
    border-radius: 50%;
    margin-bottom: var(--spacing-lg);
}

.about__card-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-dark);
    margin-bottom: var(--spacing-base);
}

.about__card-text {
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== SERVICES SECTION ===== */
.services {
    padding: var(--spacing-4xl) 0;
    background-color: var(--bg-light);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
}

.service__card {
    background-color: var(--bg-white);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

.service__card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px var(--shadow-medium);
    border-color: var(--primary-color);
}

.service__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--text-white);
    border-radius: 50%;
    margin-bottom: var(--spacing-lg);
}

.service__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-dark);
    margin-bottom: var(--spacing-base);
}

.service__description {
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== CONTACT SECTION ===== */
.contact {
    padding: var(--spacing-4xl) 0;
    background-color: var(--bg-white);
}

.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: start;
}

.contact__title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-dark);
    margin-bottom: var(--spacing-xl);
}

.contact__item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-base);
    margin-bottom: var(--spacing-xl);
}

.contact__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background-color: var(--primary-color);
    color: var(--text-white);
    border-radius: 50%;
    flex-shrink: 0;
}

.contact__item h4 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--text-dark);
    margin-bottom: var(--spacing-xs);
}

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

/* ===== FORM STYLES ===== */
.form__group {
    margin-bottom: var(--spacing-lg);
}

.form__input,
.form__textarea {
    width: 100%;
    padding: var(--spacing-base);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    border: 2px solid var(--border-light);
    border-radius: var(--border-radius);
    background-color: var(--bg-white);
    transition: var(--transition);
}

.form__input:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

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

/* ===== FOOTER ===== */
.footer {
    background-color: var(--bg-dark);
    color: var(--text-white);
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
}

.footer__content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-3xl);
}

.footer__logo {
    height: 40px;
    width: auto;
    margin-bottom: var(--spacing-base);
}

.footer__description {
    color: #BDC3C7;
    line-height: 1.6;
}

.footer__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-base);
}

.footer__list {
    list-style: none;
}

.footer__list li {
    margin-bottom: var(--spacing-xs);
}

.footer__link {
    color: #BDC3C7;
    text-decoration: none;
    transition: var(--transition);
}

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

.footer__text {
    color: #BDC3C7;
    margin-bottom: var(--spacing-xs);
}

.footer__bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid #34495E;
    text-align: center;
}

.footer__copyright {
    color: #BDC3C7;
    font-size: var(--font-size-sm);
}

/* ===== RESPONSIVE DESIGN ===== */
@media screen and (max-width: 768px) {
    :root {
        --font-size-5xl: 2.25rem;
        --font-size-4xl: 1.875rem;
        --spacing-4xl: 3rem;
    }
    
    .nav__menu {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background-color: var(--bg-white);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--spacing-3xl);
        transition: var(--transition);
        box-shadow: 0 10px 30px var(--shadow-light);
    }
    
    .nav__menu.show {
        left: 0;
    }
    
    .nav__toggle {
        display: flex;
    }
    
    .nav__toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav__toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav__toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero__actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero__actions .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .about__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .services__grid {
        grid-template-columns: 1fr;
    }
    
    .contact__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .footer__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        text-align: center;
    }
}

@media screen and (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero__title {
        font-size: var(--font-size-3xl);
    }
    
    .hero__description {
        font-size: var(--font-size-base);
    }
    
    .section__title {
        font-size: var(--font-size-3xl);
    }
    
    .about__card,
    .service__card {
        padding: var(--spacing-lg);
    }
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero__content,
.about__card,
.service__card {
    animation: fadeInUp 0.6s ease-out;
}

/* ===== SCROLL ANIMATIONS ===== */
@media (prefers-reduced-motion: no-preference) {
    .about__card,
    .service__card {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    }
    
    .about__card.animate,
    .service__card.animate {
        opacity: 1;
        transform: translateY(0);
    }
}