/* ============================================
   SOLVETRONICS — Main Stylesheet
   Colors: Black #000, Cyan #0DBBF0, White #FFF
   Fonts: Orbitron (headings), Exo 2 (body)
   ============================================ */

:root {
    --color-primary: #0DBBF0;
    --color-primary-dark: #0a9fd0;
    --color-primary-glow: rgba(13, 187, 240, 0.15);
    --color-primary-glow-strong: rgba(13, 187, 240, 0.3);
    --color-black: #000000;
    --color-bg-dark: #0a0a0a;
    --color-bg-section: #050508;
    --color-bg-card: #111116;
    --color-bg-card-hover: #18181f;
    --color-text: #e0e0e0;
    --color-text-muted: #888;
    --color-text-bright: #ffffff;
    --color-border: #1a1a22;
    --color-border-light: #2a2a35;

    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Exo 2', sans-serif;

    --nav-height: 72px;
    --container-width: 1140px;
    --radius: 4px;
    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    color: var(--color-text);
    background-color: var(--color-bg-dark);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    color: var(--color-text-bright);
}

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

h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--color-text-bright);
    line-height: 1.2;
    letter-spacing: 0.02em;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---- Navigation ---- */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(10, 10, 10, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 36px;
    width: auto;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-links a {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    padding: 8px 16px;
    border-radius: var(--radius);
    transition: all var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-primary);
    background: var(--color-primary-glow);
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    gap: 4px;
}

.lang-btn {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    padding: 4px 10px;
    border-radius: var(--radius);
    transition: all var(--transition);
    letter-spacing: 0.05em;
}

.lang-btn:hover {
    color: var(--color-text-bright);
}

.lang-btn.active {
    color: var(--color-primary);
    background: var(--color-primary-glow);
}

/* Hamburger */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: all var(--transition);
}

.hamburger {
    position: relative;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
}

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

/* ---- Hero Section ---- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: calc(var(--nav-height) + 40px) 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 50% 40%, var(--color-primary-glow) 0%, transparent 70%),
        var(--color-bg-dark);
}

.circuit-lines {
    position: absolute;
    inset: 0;
    opacity: 0.04;
    background-image:
        linear-gradient(var(--color-primary) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-primary) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-content {
    position: relative;
    max-width: 800px;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 20px;
    letter-spacing: 0.04em;
}

.hero-accent {
    color: var(--color-primary);
    display: block;
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-muted);
    margin-bottom: 40px;
    font-weight: 300;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ---- Buttons ---- */
.btn {
    display: inline-block;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 12px 32px;
    border-radius: var(--radius);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: var(--color-black);
    box-shadow: 0 0 24px var(--color-primary-glow-strong);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary-glow);
    color: var(--color-text-bright);
}

.btn-large {
    padding: 16px 40px;
    font-size: 1rem;
}

/* ---- Sections ---- */
.section {
    padding: 100px 0;
}

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

.section-title {
    text-align: center;
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    margin-bottom: 60px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 2px;
    background: var(--color-primary);
    margin: 16px auto 0;
}

/* ---- Page Hero ---- */
.page-hero {
    padding: calc(var(--nav-height) + 60px) 0 60px;
    text-align: center;
    background:
        radial-gradient(ellipse 50% 60% at 50% 80%, var(--color-primary-glow) 0%, transparent 70%),
        var(--color-bg-dark);
}

.page-title {
    font-size: clamp(2rem, 4vw, 3rem);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 16px;
}

.page-intro {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
    font-weight: 300;
}

/* ---- Features Grid (Home) ---- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 36px 28px;
    transition: all var(--transition);
}

.feature-card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-primary);
    box-shadow: 0 0 30px var(--color-primary-glow);
    transform: translateY(-2px);
}

.feature-icon {
    color: var(--color-primary);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.feature-card p {
    font-size: 0.92rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ---- Services List ---- */
.services-list {
    max-width: 800px;
    margin: 0 auto;
}

.service-item {
    display: flex;
    gap: 32px;
    padding: 48px 0;
    border-bottom: 1px solid var(--color-border);
    align-items: flex-start;
}

.service-item:last-child {
    border-bottom: none;
}

.service-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-primary);
    opacity: 0.3;
    min-width: 80px;
    line-height: 1;
}

.service-content h2 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.service-content p {
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ---- About ---- */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text h2 {
    font-size: 1.4rem;
    margin-bottom: 16px;
    margin-top: 48px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.about-text h2:first-child {
    margin-top: 0;
}

.about-text p {
    color: var(--color-text-muted);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-highlights {
    display: flex;
    gap: 40px;
    margin-top: 48px;
    flex-wrap: wrap;
}

.highlight {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.highlight-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 8px;
}

.highlight-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ---- Projects Grid ---- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 32px;
}

.project-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all var(--transition);
}

.project-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 0 30px var(--color-primary-glow);
    transform: translateY(-2px);
}

.project-image {
    height: 220px;
    background: var(--color-bg-section);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-placeholder {
    color: var(--color-border-light);
}

.project-info {
    padding: 28px;
}

.project-tag {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.project-info h3 {
    font-size: 1.2rem;
    margin: 8px 0 12px;
}

.project-info p {
    font-size: 0.92rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: 16px;
}

.project-tech {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.project-tech span {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-muted);
    background: var(--color-bg-section);
    border: 1px solid var(--color-border);
    padding: 4px 12px;
    border-radius: var(--radius);
}

/* ---- Contact ---- */
.contact-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    max-width: 900px;
    margin: 0 auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.form-group input,
.form-group textarea {
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-text-bright);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 12px 16px;
    transition: border-color var(--transition);
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 12px var(--color-primary-glow);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
    opacity: 0.5;
}

.contact-info {
    padding-top: 8px;
}

.contact-info-block {
    margin-bottom: 32px;
}

.contact-info-block h3 {
    font-family: var(--font-display);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
    color: var(--color-primary);
}

.contact-info-block p,
.contact-info-block a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.social-link-text {
    font-weight: 600;
    color: var(--color-primary) !important;
}

/* ---- CTA Section ---- */
.section-cta {
    background:
        radial-gradient(ellipse 50% 70% at 50% 50%, var(--color-primary-glow) 0%, transparent 70%),
        var(--color-bg-section);
    text-align: center;
}

.cta-content h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: 12px;
}

.cta-content p {
    color: var(--color-text-muted);
    margin-bottom: 32px;
    font-size: 1.05rem;
}

/* ---- Flash Messages ---- */
.flash-messages {
    max-width: var(--container-width);
    margin: calc(var(--nav-height) + 16px) auto 0;
    padding: 0 24px;
}

.flash {
    padding: 14px 20px;
    border-radius: var(--radius);
    font-size: 0.92rem;
    margin-bottom: 8px;
}

.flash-success {
    background: rgba(13, 187, 240, 0.1);
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
}

/* ---- Footer ---- */
.main-footer {
    background: var(--color-black);
    border-top: 1px solid var(--color-border);
    padding: 60px 0 0;
}

.footer-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
}

.footer-logo {
    height: 28px;
    width: auto;
    margin-bottom: 12px;
}

.footer-tagline {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-style: italic;
}

.footer-links h4,
.footer-contact h4 {
    font-family: var(--font-display);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

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

.footer-contact p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.footer-social {
    margin-top: 12px;
}

.social-link {
    color: var(--color-text-muted);
    transition: color var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(10, 10, 10, 0.98);
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links a {
        padding: 12px 0;
    }

    .lang-switcher {
        margin-left: auto;
        margin-right: 12px;
    }

    .hero {
        min-height: 80vh;
        padding-top: calc(var(--nav-height) + 60px);
    }

    .hero-title {
        font-size: 1.8rem;
    }

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

    .service-item {
        flex-direction: column;
        gap: 12px;
    }

    .service-number {
        min-width: auto;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .about-highlights {
        justify-content: center;
    }

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