/* ============================================================================
   ATMINIMAS.LT - MODERNIZUOTAS STILIUS V2.0
   Pagal PROJEKTO_SPECIFIKACIJA_IR_ARCHITEKTŪRA.md reikalavimus
   "Security by Design" ir 30-50 metų ilgaamžiškumo strategija
   ============================================================================ */

/* Importuoti Premium šriftus */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Playfair+Display:wght@400;500;600;700&display=swap');

/* ============================================================================
   CSS KINTAMIEJI - MODERNI SPALVŲ PALETĖ
   ============================================================================ */
:root {
    /* Pagrindinės spalvos - Švarūs, šiuolaikiniai tonai */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-bg-tertiary: #f1f3f5;
    --color-bg-dark: #212529;
    
    /* Teksto spalvos - Optimizuotas kontrastas */
    --color-text-primary: #1a202c;
    --color-text-secondary: #4a5568;
    --color-text-muted: #718096;
    --color-text-light: #a0aec0;
    
    /* Akcentų spalvos - Elegantiškas mėlynas + auksas */
    --color-accent-primary: #2563eb;
    --color-accent-primary-hover: #1e40af;
    --color-accent-primary-light: #dbeafe;
    --color-accent-gold: #d4af37;
    --color-accent-gold-hover: #b8941f;
    --color-accent-success: #10b981;
    --color-accent-warning: #f59e0b;
    --color-accent-danger: #ef4444;
    
    /* Gradientai */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-gold: linear-gradient(135deg, #f6d365 0%, #fda085 100%);
    --gradient-dark: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
    
    /* Ribų spalvos */
    --color-border-light: #e2e8f0;
    --color-border-medium: #cbd5e1;
    --color-border-dark: #94a3b8;
    
    /* Šešėliai - Daugiasluoksniai, gilus efektas */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 2px 4px 0 rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 8px -2px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, 0.12), 0 8px 16px -4px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 24px 48px -12px rgba(0, 0, 0, 0.18);
    --shadow-2xl: 0 32px 64px -12px rgba(0, 0, 0, 0.25);
    
    /* Tipografija */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
    
    /* Tarpai - Proporcinga sistema */
    --spacing-xs: 0.5rem;    /* 8px */
    --spacing-sm: 0.75rem;   /* 12px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.5rem;    /* 24px */
    --spacing-xl: 2rem;      /* 32px */
    --spacing-2xl: 3rem;     /* 48px */
    --spacing-3xl: 4rem;     /* 64px */
    --spacing-4xl: 6rem;     /* 96px */
    
    /* Animacijos */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
}

/* ============================================================================
   TAMSIOS TEMOS KINTAMIEJI
   ============================================================================ */
[data-theme="dark"] {
    --color-bg-primary: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-tertiary: #334155;
    --color-bg-dark: #020617;
    
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #94a3b8;
    --color-text-light: #64748b;
    
    --color-accent-primary: #3b82f6;
    --color-accent-primary-hover: #60a5fa;
    --color-accent-primary-light: #1e3a8a;
    --color-accent-gold: #fbbf24;
    --color-accent-gold-hover: #fcd34d;
    
    --color-border-light: #334155;
    --color-border-medium: #475569;
    --color-border-dark: #64748b;
    
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 2px 4px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 8px -2px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 24px 48px -12px rgba(0, 0, 0, 0.7);
}

/* ============================================================================
   BAZINIAI STILIAI
   ============================================================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    overflow-x: hidden;
}

/* ============================================================================
   TIPOGRAFIJA
   ============================================================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-lg);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

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

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

/* ============================================================================
   KONTEINERIS
   ============================================================================ */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* ============================================================================
   NAVIGACIJOS JUOSTA - MODERNI, PERMATOMĄ
   ============================================================================ */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--color-border-light);
    padding: var(--spacing-md) 0;
    transition: all var(--transition-base);
}

[data-theme="dark"] .navbar {
    background: rgba(15, 23, 42, 0.85);
    border-bottom-color: var(--color-border-dark);
}

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

.logo {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-accent-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: transform var(--transition-base);
}

.logo:hover {
    transform: scale(1.05);
}

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

.nav-menu a {
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
    transition: all var(--transition-base);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    position: relative;
}

.nav-menu a:hover {
    color: var(--color-accent-primary);
    background: var(--color-accent-primary-light);
}

.nav-menu a.active {
    color: var(--color-accent-primary);
    font-weight: 600;
}

/* ============================================================================
   MYGTUKAI - MODERNŪS, ANIMUOTI
   ============================================================================ */
.btn, .btn-primary, .btn-secondary, .btn-large, .link-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 1rem;
    line-height: 1;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn-primary, .btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover, .btn-large:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active, .btn-large:active {
    transform: translateY(0);
}

.btn-secondary {
    padding: var(--spacing-md) var(--spacing-xl);
    background: transparent;
    color: var(--color-accent-primary);
    border: 2px solid var(--color-accent-primary);
}

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

.link-primary {
    color: var(--color-accent-primary);
    font-weight: 600;
    padding: var(--spacing-xs) 0;
    position: relative;
}

.link-primary::after {
    content: '→';
    margin-left: var(--spacing-xs);
    transition: transform var(--transition-base);
    display: inline-block;
}

.link-primary:hover::after {
    transform: translateX(4px);
}

/* ============================================================================
   HERO SEKCIJA - ĮSPŪDINGA, SU ANIMACIJOMIS
   ============================================================================ */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero h1 {
    color: white;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 0.8s ease-out;
}

.hero p {
    color: rgba(255, 255, 255, 0.95);
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero .btn-large {
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
    background: white;
    color: var(--color-accent-primary);
    font-size: 1.15rem;
    padding: var(--spacing-lg) var(--spacing-2xl);
}

.hero .btn-large:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: var(--shadow-2xl);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================================================
   SAVYBĖS / FEATURES - MODERNŪS KORTELIŲ STIL
   ============================================================================ */
.features {
    padding: var(--spacing-4xl) 0;
    background: var(--color-bg-secondary);
}

.features h2 {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    color: var(--color-text-primary);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-2xl);
}

.feature-card {
    background: var(--color-bg-primary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--color-border-light);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    transform: scaleY(0);
    transition: transform var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
    transform: scaleY(1);
}

.feature-card h3 {
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.feature-card p {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ============================================================================
   KAINODARA - ELEGANTIŠKA IR AIŠKI
   ============================================================================ */
.pricing {
    padding: var(--spacing-4xl) 0;
    background: var(--color-bg-primary);
    text-align: center;
}

.pricing h2 {
    margin-bottom: var(--spacing-3xl);
}

.price-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
    max-width: 1200px;
    margin: 0 auto;
}

.price-card {
    background: var(--color-bg-primary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    border: 2px solid var(--color-border-light);
    transition: all var(--transition-base);
    position: relative;
    display: flex;
    flex-direction: column;
}

.price-card.featured {
    border-color: var(--color-accent-gold);
    box-shadow: var(--shadow-xl);
    transform: scale(1.05);
}

.price-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.price-card.featured:hover {
    transform: translateY(-8px) scale(1.07);
}

.price-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-gold);
    color: var(--color-bg-dark);
    padding: var(--spacing-xs) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    box-shadow: var(--shadow-md);
}

.price-card h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
}

.price {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-accent-primary);
    margin: var(--spacing-lg) 0;
}

.price-card ul {
    list-style: none;
    margin: var(--spacing-xl) 0;
    text-align: left;
    flex-grow: 1;
}

.price-card li {
    padding: var(--spacing-sm) 0;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.price-card li::before {
    content: '✓';
    color: var(--color-accent-success);
    font-weight: 700;
    flex-shrink: 0;
}

/* ============================================================================
   FOOTER
   ============================================================================ */
footer {
    background: var(--gradient-dark);
    color: rgba(255, 255, 255, 0.9);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    margin-top: var(--spacing-4xl);
}

footer a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-base);
}

footer a:hover {
    color: white;
}

/* ============================================================================
   FORMOS - MODERNIOS IR PRIEINAMOS
   ============================================================================ */
.form-container {
    max-width: 600px;
    margin: var(--spacing-4xl) auto;
    padding: var(--spacing-2xl);
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border-light);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--color-text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border-medium);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-base);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 4px var(--color-accent-primary-light);
}

/* ============================================================================
   ALERT PRANEŠIMAI
   ============================================================================ */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.alert-success {
    background: #f0fdf4;
    color: #166534;
    border-left-color: var(--color-accent-success);
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border-left-color: var(--color-accent-danger);
}

.alert-warning {
    background: #fffbeb;
    color: #92400e;
    border-left-color: var(--color-accent-warning);
}

/* ============================================================================
   RESPONSIVE DIZAINAS
   ============================================================================ */
@media (max-width: 768px) {
    .nav-menu {
        gap: var(--spacing-md);
        font-size: 0.9rem;
    }
    
    .hero {
        min-height: 70vh;
        padding: var(--spacing-3xl) 0;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .price-grid {
        grid-template-columns: 1fr;
    }
    
    .price-card.featured {
        transform: scale(1);
    }
}

/* ============================================================================
   UTILITY KLASĖS
   ============================================================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }