/* ==========================================
   DESIGN SYSTEM - Reusable Variables
========================================== */
:root {
    /* Colors */
    --color-primary: #0040b4;          /* Dogovorena plava */
    --color-primary-light: #0052d9;    /* Svjetlija za gradiente */
    --color-primary-dark: #003399;     /* Tamnija za hover */
    --color-accent: #06B6D4;           /* Cyan - za detalje */
    --color-accent-hover: #0891B2;
    --color-cta: #FF6B35;              /* Narandžasta za buttone */
    --color-cta-hover: #E85A2A;
    --color-success: #10B981;
    --color-text-primary: #1a1a1a;
    --color-text-secondary: #4a5568;
    --color-text-muted: #718096;
    --color-background: #FFFFFF;
    --color-surface: #F8FAFC;
    --color-border: #E2E8F0;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;   /* 36px */
    --font-size-5xl: 3rem;      /* 48px */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Spacing */
    --spacing-xs: 0.5rem;   /* 8px */
    --spacing-sm: 1rem;     /* 16px */
    --spacing-md: 1.5rem;   /* 24px */
    --spacing-lg: 2rem;     /* 32px */
    --spacing-xl: 3rem;     /* 48px */
    --spacing-2xl: 4rem;    /* 64px */
    --spacing-3xl: 6rem;    /* 96px */
    
    /* Layout */
    --container-max-width: 1200px;
    --content-max-width: 800px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

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

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

/* ==========================================
   BUTTON COMPONENTS
========================================== */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    line-height: 1;
}

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

.btn-primary:hover {
    background-color: var(--color-cta-hover);
    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: white;
}

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

/* ==========================================
   CARD COMPONENT
========================================== */
.card {
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
    border-color: var(--color-accent);
}

.card-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
}

.card-text {
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

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

.section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    max-width: var(--content-max-width);
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

/* ==========================================
   HEADER / NAVIGATION
========================================== */
.header {
    background-color: var(--color-primary);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

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

.logo {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: white;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
    align-items: center;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-accent);
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    gap: 8px;
}

.lang-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.lang-link:hover {
    color: white;
    background-color: rgba(255, 255, 255, 0.1);
}

.lang-link.active {
    color: var(--color-cta);
    font-weight: 600;
}

/* ==========================================
   HERO SECTION
========================================== */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.hero-title {
    color: white;
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-5xl);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--spacing-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    margin-top: var(--spacing-xl);
}

/* ==========================================
   FEATURES GRID
========================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

/* ==========================================
   STEPS / HOW IT WORKS
========================================== */
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.step {
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--color-cta) 0%, var(--color-primary) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin: 0 auto var(--spacing-md);
}

.step-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
}

/* ==========================================
   PRICING SECTION
========================================== */
.pricing-card {
    max-width: 500px;
    margin: 0 auto;
    background: var(--color-background);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
}

.pricing-card.featured {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-xl);
    position: relative;
}

.pricing-card.featured::before {
    content: "NAJPOPULARNIEJSZY";
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    padding: 4px 16px;
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.5px;
}

.pricing-amount {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin: var(--spacing-md) 0;
}

.pricing-period {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
}

.pricing-features {
    list-style: none;
    margin: var(--spacing-xl) 0;
    text-align: left;
}

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

.pricing-feature::before {
    content: "✓";
    color: var(--color-success);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-lg);
}

/* ==========================================
   CTA SECTION
========================================== */
.cta-section {
    background-color: var(--color-surface);
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.cta-title {
    margin-bottom: var(--spacing-md);
}

.cta-text {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
}

/* ==========================================
   FOOTER
========================================== */
.footer {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.footer-text {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 0;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    list-style: none;
    margin-top: var(--spacing-md);
}

.footer-link {
    color: white;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-accent);
}

/* ==========================================
   HAMBURGER MENU (Mobile)
========================================== */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 101;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background: white;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

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

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

/* Language Select Dropdown (za 27 jezika) */
.lang-select {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 6px 10px;
    border-radius: 4px;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
}

.lang-select option {
    background: var(--color-primary);
    color: white;
}

/* ==========================================
   RESPONSIVE DESIGN - UPDATED
========================================== */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
    }

    /* Show hamburger on mobile */
    .hamburger {
        display: flex;
    }

    /* Hide nav links by default on mobile */
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--color-primary);
        flex-direction: column;
        justify-content: flex-start;
        padding: 80px 30px 30px;
        gap: var(--spacing-lg);
        transition: right 0.3s ease;
        box-shadow: -5px 0 15px rgba(0,0,0,0.3);
        z-index: 100;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-link {
        font-size: var(--font-size-lg);
        padding: var(--spacing-sm) 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .lang-switcher {
        width: 100%;
    }

    .lang-select {
        width: 100%;
        padding: var(--spacing-sm);
        font-size: var(--font-size-base);
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .hero {
        padding: var(--spacing-2xl) 0;
    }

    .section {
        padding: var(--spacing-2xl) 0;
    }

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