/* ============================================
   CSS VARIABLES - Minden változtatható érték
   ============================================ */
:root {
    /* Colors */
    --color-primary: #003366;      /* Corporate blue - VÁLTOZTASD itt! */
    --color-text: #000000;
    --color-text-light: #666666;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f8f8;
    
    /* Typography */
    --font-main: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 1rem;
    --spacing-s: 2rem;
    --spacing-m: 4rem;
    --spacing-l: 6rem;
    --spacing-xl: 8rem;
    --spacing-xxl: 12rem;
    
    /* Layout */
    --container-max: 1200px;
    --header-height: 140px;
    
    /* Hero Toggle - VÁLTOZTASD 'none'-ra ha nem kell hero! */
    --hero-display: flex;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

/* Desktop scroll padding */
@media (min-width: 1025px) {
    html {
        scroll-padding-top: var(--header-height);
    }
}

/* Tablet & Mobile scroll padding - measured value */
@media (max-width: 1024px) {
    html {
        scroll-padding-top: var(--measured-header-height, 200px);
    }
}

body {
    font-family: var(--font-main);
    font-weight: var(--font-weight-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
}

p {
    margin-bottom: var(--spacing-s);
}

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

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

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

/* ============================================
   HEADER - Sticky Navigation
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid #eee;
    z-index: 1000;
    padding: var(--spacing-s) 0;
}

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

/* Brand (left side) */
.brand {
    flex-shrink: 0;
}

.brand-name-link {
    text-decoration: none;
    color: inherit;
    transition: opacity var(--transition-fast);
}

.brand-name-link:hover {
    opacity: 0.7;
}

.brand-name {
    font-size: 1.8rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.brand-tagline {
    font-size: 1rem;
    font-weight: var(--font-weight-normal);
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.brand-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.05rem;
    font-weight: var(--font-weight-semibold);
}

.brand-nav a {
    color: var(--color-primary);
    transition: opacity var(--transition-fast);
}

.brand-nav a:hover {
    opacity: 0.7;
}

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

/* Main Navigation (right side) */
.main-nav {
    display: flex;
    gap: var(--spacing-s);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
}

.main-nav a {
    transition: color var(--transition-fast);
}

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

/* Hamburger (hidden on desktop) */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-text);
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* X close button (hidden on desktop) */
.nav-close {
    display: none;
}

/* ============================================
   HERO SECTION (toggleable)
   ============================================ */
.hero {
    display: var(--hero-display);
    min-height: 90vh;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xxl) 0;
    margin-top: var(--header-height);
}

/* Tablet & Mobile hero spacing - measured value */
@media (max-width: 1024px) {
    .hero {
        margin-top: var(--measured-header-height, 160px);
    }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-m);
    line-height: 1.1;
}

.cta-button {
    display: inline-block;
    padding: 1rem 3rem;
    background-color: var(--color-primary);
    color: var(--color-bg);
    font-weight: var(--font-weight-semibold);
    border-radius: 0;
    transition: all var(--transition-normal);
    border: 2px solid var(--color-primary);
}

.cta-button:hover {
    background-color: transparent;
    color: var(--color-primary);
}

/* ============================================
   MAIN CONTENT
   ============================================ */
main {
    margin-top: var(--header-height);
}

/* Main Heading - Primary H1 for SEO */
.section-intro {
    padding: var(--spacing-l) 0;
    text-align: center;
    background-color: #fafafa;
}

.main-heading {
    font-size: 2rem;
    font-weight: var(--font-weight-bold);
    line-height: 1.3;
    color: var(--color-text);
    max-width: 900px;
    margin: 0 auto;
}

.section {
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid #eee;
}

.section:nth-child(even) {
    background-color: var(--color-bg-alt);
}

.section-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-m);
}

.section-content {
    max-width: 800px;
    font-size: 1.1rem;
    line-height: 1.8;
}

/* Feature Lists */
.feature-list {
    list-style: none;
    margin-top: var(--spacing-s);
}

.feature-list li {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 1rem;
}

.feature-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
}

/* Expertise Grid */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-m);
    margin-top: var(--spacing-m);
}

.expertise-item h3 {
    font-size: 1.3rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.expertise-item p {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 0;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.section-contact {
    border-bottom: none;
}

.contact-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-m);
    max-width: 600px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.contact-label {
    font-size: 0.9rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0;
}

.contact-link {
    font-size: 1.3rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    transition: opacity var(--transition-fast);
}

.contact-link:hover {
    opacity: 0.7;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: var(--spacing-m) 0;
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.9rem;
    border-top: 1px solid #eee;
}

/* ============================================
   RESPONSIVE
   ============================================ */

/* Tablet & Mobile - Hamburger menu */
@media (max-width: 1024px) {
    :root {
        --spacing-m: 3rem;
        --spacing-l: 4rem;
        --spacing-xl: 6rem;
        --spacing-xxl: 8rem;
    }
    
    .header-content {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: var(--spacing-s);
        position: relative;
    }
    
    /* Show hamburger */
    .hamburger {
        display: flex;
    }
    
    /* Show X close button */
    .nav-close {
        display: block;
        position: absolute;
        top: 1rem;
        right: 1rem;
        background: none;
        border: none;
        font-size: 2.5rem;
        line-height: 1;
        cursor: pointer;
        color: var(--color-text);
        padding: 0;
        width: 40px;
        height: 40px;
    }
    
    /* Hide nav by default */
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 400px;
        height: 100vh;
        background-color: var(--color-bg);
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-xl) var(--spacing-s);
        gap: var(--spacing-s);
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
        z-index: 999;
    }
    
    /* Show nav when active */
    .main-nav.active {
        right: 0;
    }
    
    .main-nav a {
        font-size: 1.2rem;
        width: 100%;
        padding: 0.5rem 0;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

/* Mobile specific */
@media (max-width: 768px) {
    :root {
        --spacing-s: 1.5rem;
        --spacing-m: 2rem;
        --spacing-l: 3rem;
        --spacing-xl: 4rem;
        --spacing-xxl: 6rem;
        --header-height: auto;
    }
    
    .header {
        padding: var(--spacing-s) 0;
    }
    
    .brand-name {
        font-size: 1.5rem;
    }
    
    .brand-tagline {
        font-size: 0.9rem;
    }
    
    .brand-nav {
        font-size: 0.9rem;
        gap: 0.4rem;
    }
    
    .hero {
        padding: var(--spacing-m) 0 !important;
    }
    
    .main-heading {
        font-size: 1.5rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .section-content {
        font-size: 1rem;
    }
    
    .expertise-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-s);
    }
    
    .contact-link {
        font-size: 1.1rem;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }
    
    .cta-button {
        padding: 0.8rem 2rem;
        font-size: 0.9rem;
    }
}