/* =========================================
   1. VARIABLES & RESET
========================================= */
:root {
    --primary: #0062ff;
    --primary-hover: #004ecc;
    --dark: #0f172a;
    --light: #f8fafc;
    --gray-border: #e2e8f0;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --white: #ffffff;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.05);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--white);
    color: var(--text-main);
    line-height: 1.6;
    padding-top: 90px;
    -webkit-font-smoothing: antialiased;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* =========================================
   2. TYPOGRAPHY & BUTTONS
========================================= */
.section-title-center {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 3rem;
}

.section-title-left {
    text-align: left;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 1.5rem;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary);
    color: var(--white);
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 14px 0 rgba(0, 98, 255, 0.39);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 98, 255, 0.23);
    color: var(--white);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    padding: 1rem;
}

.btn-secondary:hover {
    color: var(--dark);
    transform: translateX(5px);
}

/* =========================================
   3. HEADER / NAV
========================================= */
.biz-nav {
    height: 90px;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 0 5%;
    border-bottom: 1px solid var(--gray-border);
}

/* Logo — κλικ πάει πάνω */
.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    cursor: pointer;
}

.nav-logo-img {
    height: 75px;
    width: auto;
    object-fit: contain;
    transform: scale(1.2);
    transform-origin: left center;
    transition: var(--transition);
}

.nav-logo-img:hover {
    opacity: 0.85;
}

/* Nav links */
.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition);
    padding: 0.4rem 0;
    border-bottom: 2px solid transparent;
}

.nav-links a:hover {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.nav-links a.nav-btn {
    background-color: var(--primary);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    box-shadow: var(--shadow-sm);
    border-bottom: none;
}

.nav-links a.nav-btn:hover {
    background-color: var(--dark);
    color: var(--white);
    transform: translateY(-2px);
    border-bottom-color: transparent;
}

/* Header right: socials + hamburger */
.header-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.header-socials {
    display: flex;
    gap: 0.75rem;
}

.header-socials a {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
    border: 1px solid var(--gray-border);
    text-decoration: none;
    transition: var(--transition);
}

.header-socials a:hover {
    color: var(--primary);
    border-color: var(--primary);
    background-color: rgba(0, 98, 255, 0.06);
}

/* Hamburger — κρυμμένο σε desktop */
.menu-toggle {
    display: none;
    width: 38px;
    height: 38px;
    border-radius: 8px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 1px solid var(--gray-border);
    color: var(--text-main);
    font-size: 17px;
    transition: var(--transition);
}

.menu-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* =========================================
   4. HERO SECTION
========================================= */
.biz-hero {
    padding: 120px 0;
    background: radial-gradient(circle at top right, var(--light) 0%, var(--white) 100%);
    text-align: center;
}

.biz-hero h1 {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 900;
    color: var(--dark);
    margin-bottom: 1.5rem;
    line-height: 1.1;
    letter-spacing: -1px;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-top: 3rem;
}

/* =========================================
   5. ABOUT & STATS SECTION
========================================= */
.about-section {
    padding: 100px 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.about-text p {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.about-list {
    list-style: none;
}

.about-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.25rem;
    font-size: 1.05rem;
    font-weight: 500;
}

.about-list i {
    color: var(--primary);
    font-size: 1.25rem;
    margin-top: 3px;
}

.about-stats-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.stat-card {
    background-color: var(--light);
    padding: 3rem 2rem;
    border-radius: 24px;
    text-align: center;
    border: 1px solid var(--gray-border);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.stat-card h3 {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-card p {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark);
}

/* =========================================
   6. SERVICES SECTION
========================================= */
.services-section {
    padding: 100px 0;
    background-color: var(--light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.service-card {
    background-color: var(--white);
    padding: 3rem 2.5rem;
    border-radius: 24px;
    text-align: center;
    border: 1px solid var(--gray-border);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.icon-wrapper {
    width: 80px;
    height: 80px;
    background-color: rgba(0, 98, 255, 0.1);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.icon-wrapper i {
    font-size: 2rem;
    color: var(--primary);
}

.service-card h3 {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-muted);
}

/* =========================================
   7. CONTACT SECTION
========================================= */
.contact-section {
    padding: 100px 0;
}

.contact-wrapper {
    max-width: 850px;
    margin: 0 auto;
    background-color: var(--white);
    padding: 4rem;
    border-radius: 32px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-border);
}

.contact-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin: -1.5rem auto 3rem;
}

.biz-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.input-group {
    position: relative;
    width: 100%;
}

.input-group input,
.input-group textarea {
    width: 100%;
    padding: 1.25rem;
    background-color: var(--light);
    border: 1px solid var(--gray-border);
    border-radius: 12px;
    font-size: 1rem;
    color: var(--text-main);
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
}

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

.input-group label {
    position: absolute;
    left: 1.25rem;
    top: 1.25rem;
    color: var(--text-muted);
    pointer-events: none;
    transition: var(--transition);
    background-color: transparent;
}

.input-group input:focus,
.input-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background-color: var(--white);
    box-shadow: 0 0 0 4px rgba(0, 98, 255, 0.1);
}

.input-group input:focus ~ label,
.input-group input:not(:placeholder-shown) ~ label,
.input-group textarea:focus ~ label,
.input-group textarea:not(:placeholder-shown) ~ label {
    top: -0.6rem;
    left: 1rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    background-color: var(--white);
    padding: 0 0.4rem;
    border-radius: 4px;
}

.form-submit-btn {
    width: 100%;
    margin-top: 1rem;
    padding: 1.25rem;
    font-size: 1.1rem;
}

/* =========================================
   8. FOOTER
========================================= */
.main-footer {
    background-color: var(--dark);
    color: var(--white);
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--white);
}

.footer-brand p {
    color: var(--text-muted);
    max-width: 350px;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.footer-socials {
    display: flex;
    gap: 0.75rem;
}

.footer-socials a {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: var(--text-muted);
    border: 1px solid rgba(255, 255, 255, 0.1);
    text-decoration: none;
    transition: var(--transition);
}

.footer-socials a:hover {
    background-color: var(--primary);
    border-color: var(--primary);
    color: var(--white);
}

.main-footer h4 {
    color: var(--white);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 1.5rem;
}

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

.footer-nav li {
    margin-bottom: 0.8rem;
}

.footer-nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
}

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

.footer-contact p {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--text-muted);
    margin-bottom: 1rem;
    font-size: 0.95rem;
    line-height: 1.5;
}

.footer-contact i {
    color: var(--primary);
    margin-top: 3px;
    flex-shrink: 0;
}

.footer-bottom {
    display: flex;
    align-items: center;
     justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2.5rem;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-bottom-links {
    display: flex;
    gap: 1.5rem;
}

.footer-bottom-links a {
    color: var(--text-muted);
    font-size: 0.875rem;
    text-decoration: none;
    transition: var(--transition);
}

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

/* =========================================
   9. RESPONSIVE
========================================= */
@media (max-width: 992px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .biz-nav {
        padding: 0 1.5rem;
    }

    /* Κρύβουμε links & socials, εμφανίζουμε hamburger */
    .nav-links {
        display: none;
    }
    .header-socials {
        display: none;
    }
    .menu-toggle {
        display: flex;
    }

    /* Mobile menu ανοιχτό */
    .nav-links.is-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 90px;
        left: 0;
        right: 0;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        padding: 1.5rem 2rem;
        border-bottom: 1px solid var(--gray-border);
        gap: 1rem;
        z-index: 999;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    .hero-actions .btn-primary,
    .hero-actions .btn-secondary {
        width: 100%;
        justify-content: center;
    }

    .contact-wrapper {
        padding: 2rem 1.5rem;
    }
    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
}