/* ===== CSS Variables ===== */
:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-secondary: #0f172a;
    --color-accent: #06b6d4;

    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-text-inverse: #ffffff;

    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-dark: #0f172a;

    --color-border: #e2e8f0;

    --font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-size-base: 1rem;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    --transition: 0.3s ease;
    --header-height: 80px;
}

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

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

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

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

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

a:hover {
    color: var(--color-primary-dark);
}

ul {
    list-style: none;
}

/* ===== Container ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ===== Header & Navigation ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: box-shadow var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav__logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    color: var(--color-primary);
    font-family: monospace;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav__link {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    position: relative;
}

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

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

.nav__link--cta {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
}

.nav__link--cta:hover {
    background-color: var(--color-primary-dark);
    color: var(--color-text-inverse);
}

.nav__link--cta::after {
    display: none;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

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

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

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

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

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

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

.btn--large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

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

/* ===== Section Headers ===== */
.section__header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section__title {
    font-size: var(--font-size-3xl);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
}

.section__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
}

/* ===== Hero Section ===== */
.hero {
    padding-top: calc(var(--header-height) + var(--spacing-4xl));
    padding-bottom: var(--spacing-4xl);
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero__content {
    max-width: 800px;
}

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

.highlight {
    color: var(--color-primary);
}

.hero__subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
}

.hero__cta {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

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

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    transition: all var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}

.service-card__icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-inverse);
    margin-bottom: var(--spacing-lg);
}

.service-card__title {
    font-size: var(--font-size-xl);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
}

.service-card__description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.service-card__features {
    list-style: none;
}

.service-card__features li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--color-text);
    font-size: var(--font-size-sm);
}

.service-card__features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background-color: var(--color-primary);
    border-radius: 50%;
}

/* ===== Method Section ===== */
.method {
    padding: var(--spacing-4xl) 0;
    background-color: var(--color-bg-alt);
}

.method__steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.method__step {
    text-align: center;
    padding: var(--spacing-xl);
}

.method__number {
    width: 60px;
    height: 60px;
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
}

.method__step h3 {
    font-size: var(--font-size-lg);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
}

.method__step p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

/* ===== Why Section ===== */
.why {
    padding: var(--spacing-4xl) 0;
    background-color: var(--color-bg);
}

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

.why__item {
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    background-color: var(--color-bg-alt);
    transition: all var(--transition);
}

.why__item:hover {
    background-color: var(--color-bg);
    box-shadow: var(--shadow-md);
}

.why__icon {
    width: 50px;
    height: 50px;
    background-color: var(--color-primary);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-inverse);
    margin-bottom: var(--spacing-md);
}

.why__item h3 {
    font-size: var(--font-size-lg);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

.why__item p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

/* ===== CTA Section ===== */
.cta-section {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    text-align: center;
    color: var(--color-text-inverse);
}

.cta-section h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.cta-section p {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
}

.cta-section .btn--primary {
    background-color: var(--color-text-inverse);
    color: var(--color-primary);
}

.cta-section .btn--primary:hover {
    background-color: var(--color-bg-alt);
    transform: translateY(-2px);
}

/* ===== Contact Section ===== */
.contact {
    padding: var(--spacing-4xl) 0;
    background-color: var(--color-bg-alt);
}

.contact__content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.contact__info h3 {
    font-size: var(--font-size-2xl);
    color: var(--color-secondary);
    margin-bottom: var(--spacing-xs);
}

.contact__role {
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-xl);
}

.contact__details {
    margin-bottom: var(--spacing-xl);
}

.contact__item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    color: var(--color-text);
}

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

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

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

.contact__social {
    display: flex;
    gap: var(--spacing-md);
}

.contact__social a {
    width: 40px;
    height: 40px;
    background-color: var(--color-secondary);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-inverse);
    transition: all var(--transition);
}

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

/* ===== Contact Form ===== */
.contact__form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    background-color: var(--color-bg);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

/* Honeypot anti-spam */
.honeypot {
    position: absolute;
    left: -9999px;
    opacity: 0;
    height: 0;
    width: 0;
}

.form__group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

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

.form__group label {
    font-weight: 500;
    color: var(--color-secondary);
    font-size: var(--font-size-sm);
}

.form__group input,
.form__group select,
.form__group textarea {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-family: inherit;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form__group input:focus,
.form__group select:focus,
.form__group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.contact__form .btn {
    grid-column: 1 / -1;
    margin-top: var(--spacing-md);
}

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

.footer__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.footer__content p {
    opacity: 0.8;
    font-size: var(--font-size-sm);
}

.footer__nav {
    display: flex;
    gap: var(--spacing-xl);
}

.footer__nav a {
    color: var(--color-text-inverse);
    opacity: 0.8;
    font-size: var(--font-size-sm);
    transition: opacity var(--transition);
}

.footer__nav a:hover {
    opacity: 1;
    color: var(--color-text-inverse);
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .contact__content {
        grid-template-columns: 1fr;
    }

    .hero__title {
        font-size: var(--font-size-4xl);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }

    .nav__toggle {
        display: flex;
    }

    .nav__menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: var(--color-bg);
        flex-direction: column;
        padding: var(--spacing-xl);
        gap: var(--spacing-lg);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition);
    }

    .nav__menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .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(5px, -5px);
    }

    .hero {
        padding-top: calc(var(--header-height) + var(--spacing-2xl));
        min-height: auto;
    }

    .hero__title {
        font-size: var(--font-size-3xl);
    }

    .hero__subtitle {
        font-size: var(--font-size-base);
    }

    .hero__cta {
        flex-direction: column;
    }

    .hero__cta .btn {
        width: 100%;
    }

    .section__title {
        font-size: var(--font-size-2xl);
    }

    .contact__form {
        grid-template-columns: 1fr;
        padding: var(--spacing-lg);
    }

    .footer__content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

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

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

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

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

.hero__content {
    animation: fadeInUp 0.8s ease-out;
}

/* ===== Print Styles ===== */
@media print {
    .header,
    .nav__toggle,
    .hero__cta,
    .cta-section,
    .contact__form,
    .contact__social,
    .footer__nav {
        display: none;
    }

    body {
        font-size: 12pt;
        color: #000;
    }

    .hero {
        padding-top: 0;
        min-height: auto;
    }
}