/* Color system */
:root {
    --color-bg: #0A2540;
    --color-bg-alt: #101d2d;
    --color-surface: rgba(18, 32, 48, 0.85);
    --color-card: rgba(26, 47, 72, 0.9);
    --color-text: #E6F0FF;
    --color-text-muted: #A5BBD6;
    --color-accent: #4DB6FF;
    --color-line: rgba(255, 255, 255, 0.08);
    --color-light: #F5F5F5;
    --shadow-soft: 0 18px 45px rgba(4, 13, 26, 0.35);
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition-base: 0.35s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Barlow", "Segoe UI", sans-serif;
    background: radial-gradient(circle at top left, rgba(44, 86, 130, 0.35), transparent 45%), var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background: radial-gradient(circle at 15% 20%, rgba(116, 198, 255, 0.18), transparent 50%), radial-gradient(circle at 75% 0%, rgba(37, 76, 117, 0.4), transparent 60%);
    pointer-events: none;
    z-index: -2;
}

#heroParticles {
    position: fixed;
    inset: 0;
    z-index: -1;
    opacity: 0.6;
}

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

a:hover,
a:focus {
    color: var(--color-light);
}

.container {
    width: min(1100px, 90%);
    margin: 0 auto;
}

.site-header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 10;
    backdrop-filter: blur(12px);
    background: linear-gradient(90deg, rgba(8, 22, 40, 0.9), rgba(10, 37, 64, 0.65));
    border-bottom: 1px solid var(--color-line);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    gap: 2rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: "Space Grotesk", "Barlow", sans-serif;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.brand-mark {
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, rgba(77, 182, 255, 0.9), rgba(16, 71, 122, 0.9));
    color: #021223;
    padding: 0.4rem 0.6rem;
    border-radius: 999px;
    font-weight: 600;
}

.brand-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.main-nav {
    display: flex;
    gap: 1.5rem;
}

.main-nav a {
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    position: relative;
}

.main-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -0.4rem;
    width: 100%;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.main-nav a:hover::after,
.main-nav a:focus::after {
    transform: scaleX(1);
    transform-origin: left;
}

.lang-toggle {
    padding: 0.55rem 1.4rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.22);
    background: rgba(8, 24, 44, 0.3);
    color: var(--color-light);
    font-family: "Space Grotesk", "Barlow", sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    cursor: pointer;
    transition: border-color var(--transition-base), background var(--transition-base), transform var(--transition-base);
}

.lang-toggle:hover,
.lang-toggle:focus {
    border-color: rgba(77, 182, 255, 0.5);
    background: rgba(12, 38, 68, 0.65);
    transform: translateY(-2px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 0.35rem;
    background: transparent;
    border: none;
    padding: 0.25rem;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 1.6rem;
    height: 2px;
    background: var(--color-light);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

main {
    padding-top: 6rem;
}

.hero {
    position: relative;
    padding: clamp(6rem, 20vw, 10rem) 0 clamp(4rem, 10vw, 6rem);
    overflow: hidden;
}

.hero .container {
    display: grid;
    gap: 2.5rem;
    align-items: center;
}

.hero-text h1 {
    font-family: "Space Grotesk", "Barlow", sans-serif;
    font-size: clamp(2.4rem, 5vw, 3.4rem);
    line-height: 1.1;
    margin-bottom: 1.2rem;
}

.hero-text p {
    max-width: 32rem;
    color: var(--color-text-muted);
}

.eyebrow {
    font-size: 0.9rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: rgba(230, 240, 255, 0.6);
    margin-bottom: 1.5rem;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.hero-card {
    background: var(--color-card);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(8px);
}

.hero-card h2 {
    font-family: "Space Grotesk", sans-serif;
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
}

.hero-card ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 0.75rem;
    color: var(--color-text-muted);
}

.section {
    padding: clamp(4rem, 12vw, 6rem) 0;
}

.section h2 {
    font-family: "Space Grotesk", "Barlow", sans-serif;
    font-size: clamp(1.9rem, 4vw, 2.4rem);
    margin-bottom: 1.5rem;
}

.grid {
    display: grid;
    gap: 2.5rem;
}

.about-highlights {
    display: grid;
    gap: 1.5rem;
}

.about-highlights article {
    background: linear-gradient(135deg, rgba(18, 40, 64, 0.85), rgba(12, 31, 52, 0.75));
    padding: 1.75rem;
    border-radius: var(--radius-md);
    border: 1px solid rgba(77, 182, 255, 0.12);
    transition: transform var(--transition-base), border-color var(--transition-base);
}

.about-highlights article:hover {
    transform: translateY(-6px);
    border-color: rgba(77, 182, 255, 0.4);
}

.services {
    background: linear-gradient(160deg, rgba(9, 32, 58, 0.9), rgba(6, 19, 35, 0.9));
    border-block: 1px solid var(--color-line);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.service-grid article {
    background: rgba(10, 32, 52, 0.8);
    border: 1px solid rgba(77, 182, 255, 0.12);
    border-radius: var(--radius-md);
    padding: 1.75rem;
    transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
    box-shadow: 0 12px 28px rgba(3, 9, 18, 0.35);
}

.service-grid article:hover {
    transform: translateY(-10px);
    border-color: rgba(77, 182, 255, 0.35);
    box-shadow: 0 25px 40px rgba(2, 13, 28, 0.5);
}

.service-grid .icon {
    font-size: 1.8rem;
    display: inline-block;
    margin-bottom: 1rem;
}

.projects .project-list {
    display: grid;
    gap: 1.5rem;
}

.projects article {
    padding: 1.75rem;
    border-radius: var(--radius-md);
    background: linear-gradient(120deg, rgba(14, 35, 58, 0.9), rgba(12, 28, 48, 0.75));
    border: 1px solid rgba(77, 182, 255, 0.16);
}

.engagement {
    background: radial-gradient(circle at 0% 0%, rgba(77, 182, 255, 0.12), transparent 55%), rgba(9, 24, 44, 0.95);
}

.engagement-visual {
    height: 100%;
    min-height: 240px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(18, 43, 74, 0.9), rgba(11, 31, 53, 0.95));
    position: relative;
    overflow: hidden;
}

.engagement-visual::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 30%, rgba(77, 182, 255, 0.22), transparent 60%);
}

.engagement-list {
    list-style: none;
    padding: 0;
    margin: 2rem 0 0;
    display: grid;
    gap: 0.75rem;
    color: var(--color-text-muted);
}

.contact {
    background: linear-gradient(160deg, rgba(6, 18, 32, 0.95), rgba(13, 40, 64, 0.9));
    border-top: 1px solid var(--color-line);
}

.contact-details {
    display: grid;
    gap: 0.6rem;
    margin-top: 1.5rem;
}

.contact-form {
    display: grid;
    gap: 0.9rem;
    background: rgba(10, 25, 44, 0.9);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(77, 182, 255, 0.2);
    box-shadow: var(--shadow-soft);
}

.contact-form label {
    font-weight: 600;
    letter-spacing: 0.01em;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(0, 0, 0, 0.25);
    color: var(--color-light);
    font-size: 1rem;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(77, 182, 255, 0.15);
}

.contact-form .form-note {
    font-size: 0.85rem;
    color: rgba(230, 240, 255, 0.6);
    margin: 0.5rem 0 0;
}

.contact-form .form-feedback {
    margin: 0;
    font-size: 0.9rem;
    min-height: 1.2rem;
}

.site-footer {
    border-top: 1px solid var(--color-line);
    background: rgba(5, 16, 29, 0.92);
    padding: 2.5rem 0;
}

.footer-grid {
    display: grid;
    gap: 1.5rem;
}

.footer-links,
.footer-contact {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    font-size: 0.95rem;
    color: var(--color-text-muted);
}

.linkedin-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.8rem;
    border-radius: 999px;
    border: 1px solid transparent;
    font-weight: 600;
    letter-spacing: 0.01em;
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background var(--transition-base);
    cursor: pointer;
}

.btn.primary {
    background: linear-gradient(135deg, rgba(77, 182, 255, 1), rgba(38, 108, 175, 1));
    color: #031225;
    box-shadow: 0 18px 35px rgba(7, 36, 63, 0.45);
}

.btn.primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 25px 45px rgba(5, 28, 51, 0.6);
}

.btn.ghost {
    border-color: rgba(255, 255, 255, 0.28);
    color: var(--color-light);
    background: transparent;
}

.btn.ghost:hover {
    border-color: rgba(77, 182, 255, 0.5);
    background: rgba(7, 24, 43, 0.8);
    transform: translateY(-2px);
}

/* Scroll animation */
[data-animate] {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-animate].is-visible {
    opacity: 1;
    transform: translateY(0);
}

[data-parallax] {
    will-change: transform;
}

/* Legal pages */
.legal-page {
    background: var(--color-bg);
    color: var(--color-text);
}

.legal-header {
    border-bottom: 1px solid var(--color-line);
    background: rgba(5, 14, 24, 0.9);
    padding: 1.2rem 0;
}

.legal-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.legal-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.legal-back {
    font-weight: 600;
}

.legal-content {
    padding: clamp(3rem, 8vw, 5rem) 0;
}

.legal-content h1 {
    font-family: "Space Grotesk", sans-serif;
    margin-bottom: 2.5rem;
}

.legal-content section {
    margin-bottom: 2rem;
}

.legal-content h2 {
    margin-bottom: 0.75rem;
    font-size: 1.15rem;
}

.legal-footer {
    border-top: 1px solid var(--color-line);
    padding: 2rem 0;
    text-align: center;
    background: rgba(5, 16, 29, 0.92);
}

.legal-footer a {
    margin: 0 1rem;
}

/* Responsive adjustments */
@media (max-width: 900px) {
    .header-actions {
        gap: 0.75rem;
    }

    .main-nav {
        position: absolute;
        inset: 100% 0 auto;
        background: rgba(5, 16, 29, 0.95);
        flex-direction: column;
        padding: 1rem 2rem 2rem;
        border-bottom: 1px solid var(--color-line);
        transform: translateY(-20px);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.4s ease, transform 0.4s ease;
    }

    .main-nav.is-open {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle[aria-expanded="true"] span:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }
    .nav-toggle[aria-expanded="true"] span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle[aria-expanded="true"] span:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }

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

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

    .hero-card {
        order: -1;
    }

    .engagement-visual {
        min-height: 200px;
    }

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

@media (max-width: 600px) {
    .site-header .container {
        padding-block: 0.85rem;
        gap: 1rem;
    }

    .hero {
        padding-top: 7rem;
    }

    .contact-form {
        padding: 1.5rem;
    }

    .hero-text h1 {
        font-size: 2.1rem;
    }
}

/* Utility for reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition-duration: 0.001ms !important;
        animation-duration: 0.001ms !important;
    }
}