/* ===== HLAVNÍ STRÁNKA Cauahoj Tools ===== */
/* Tento CSS je pouze pro index.html (hlavní stránku) */

:root {
    /* Barvy */
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --secondary: #8b5cf6;
    --accent: #10b981;
    
    /* Pozadí */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: rgba(30, 41, 59, 0.8);
    --bg-overlay: rgba(15, 23, 42, 0.95);
    
    /* Text */
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    /* Border a stíny */
    --border: rgba(148, 163, 184, 0.1);
    --border-light: rgba(255, 255, 255, 0.05);
    --radius: 16px;
    --radius-lg: 24px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.3);
    
    /* Animace */
    --transition: 0.3s ease;
}

/* Reset a základní styly */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Canvas pozadí - OPRAVA */
#background-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -9999;
    pointer-events: none;
    display: block;
}

/* Hlavní kontejner */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    padding: 24px 0;
    margin-bottom: 40px;
    position: relative;
    z-index: 10;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.logo-section {
    display: flex;
    flex-direction: column;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 4px;
}

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

.logo-text {
    color: var(--text-primary);
}

.logo-highlight {
    color: var(--primary);
    font-weight: 900;
}

.tagline {
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 500;
}

/* Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: 10px 16px;
    border-radius: var(--radius);
    transition: all var(--transition);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.nav-text {
    display: inline-block;
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition);
}

.theme-toggle:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.1);
    transform: rotate(15deg);
}

/* Content wrapper */
.content-wrapper {
    flex: 1;
    position: relative;
    z-index: 1;
}

/* Hero section */
.hero-section {
    text-align: center;
    padding: 60px 0;
    margin-bottom: 60px;
    position: relative;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.5px;
}

.hero-gradient {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.stats-container {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
    margin-top: 40px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 100px;
}

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

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

/* Tools section */
.tools-section {
    padding: 60px 0;
    margin-bottom: 60px;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Tools grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.tool-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-decoration: none;
    color: inherit;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s;
}

.tool-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    background: rgba(30, 41, 59, 0.95);
}

.tool-card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.card-icon i {
    font-size: 1.75rem;
    color: white;
}

.card-content {
    flex: 1;
    margin-bottom: 20px;
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
    line-height: 1.3;
}

.card-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.card-tag {
    background: var(--accent);
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-arrow {
    color: var(--primary);
    font-size: 1.25rem;
    font-weight: 300;
    transition: transform var(--transition);
}

.tool-card:hover .card-arrow {
    transform: translateX(6px);
}

/* Features section */
.features-section {
    padding: 60px 0;
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    transition: all var(--transition);
}

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

.feature-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.feature-icon i {
    font-size: 2rem;
    color: white;
}

.feature-title {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* CTA section */
.cta-section {
    padding: 80px 0;
    text-align: center;
    margin-bottom: 60px;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.cta-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 18px 36px;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.125rem;
    transition: all 0.4s;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.cta-button:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(59, 130, 246, 0.4);
}

/* Footer */
.main-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 60px 0 30px;
    margin-top: 60px;
    position: relative;
    z-index: 10;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
}

.footer-logo i {
    color: var(--primary);
}

.footer-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    text-align: center;
}

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

.separator {
    margin: 0 12px;
    color: var(--border);
}

.footer-tech {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

.tech-badge {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Mobile components */
.mobile-menu-button {
    display: none;
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 1000;
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
    transition: all var(--transition);
}

.mobile-menu-button:hover {
    transform: scale(1.1);
}

.back-to-top {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    color: var(--text-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 999;
    box-shadow: var(--shadow);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-4px);
}

/* Mobile overlay */
.mobile-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-overlay);
    backdrop-filter: blur(20px);
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.mobile-nav-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-content {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 320px;
    max-width: 90%;
    background: var(--bg-secondary);
    padding: 30px;
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--transition);
}

.mobile-nav-overlay.active .mobile-nav-content {
    transform: translateX(0);
}

.mobile-nav-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    transition: all var(--transition);
}

.mobile-nav-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--primary);
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 40px;
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius);
    transition: all var(--transition);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
}

.mobile-nav-link:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateX(4px);
}

.mobile-nav-divider {
    height: 1px;
    background: var(--border);
    margin: 20px 0;
}

.mobile-nav-title {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 16px;
    font-weight: 700;
}

/* Responsivní design */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.8rem;
    }
    
    .tools-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .main-container {
        padding: 0 16px;
    }
    
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }
    
    .main-nav {
        display: none;
    }
    
    .mobile-menu-button {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-description {
        font-size: 1.125rem;
        padding: 0 10px;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .tool-card {
        padding: 24px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    .back-to-top {
        bottom: 90px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .stats-container {
        gap: 30px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .cta-button {
        width: 100%;
        justify-content: center;
    }
    
    .mobile-menu-button {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
    }
}

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

.tool-card, .feature-card {
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
}

.tool-card:nth-child(1) { animation-delay: 0.1s; }
.tool-card:nth-child(2) { animation-delay: 0.2s; }
.tool-card:nth-child(3) { animation-delay: 0.3s; }
.tool-card:nth-child(4) { animation-delay: 0.4s; }
.tool-card:nth-child(5) { animation-delay: 0.5s; }
.tool-card:nth-child(6) { animation-delay: 0.6s; }

/* ===== ZAKULACENÍ HLAVNÍ STRÁNKY ===== */

/* Hlavní kontejner */
.main-container {
    border-radius: 32px !important;
    margin: 20px auto !important;
    overflow: hidden !important;
}

/* Header */
.app-header {
    border-radius: 32px 32px 24px 24px !important;
    margin: 0 20px 40px 20px !important;
}

/* Hero sekce */
.hero-section {
    border-radius: 28px !important;
    margin: 0 20px 40px 20px !important;
}

/* Tools sekce */
.tools-section {
    border-radius: 28px !important;
    margin: 0 20px 60px 20px !important;
}

/* Features sekce */
.features-section {
    border-radius: 28px !important;
    margin: 0 20px 60px 20px !important;
}

/* CTA sekce */
.cta-section {
    border-radius: 28px !important;
    margin: 0 20px 60px 20px !important;
}

/* Footer */
.main-footer {
    border-radius: 32px 32px 0 0 !important;
    margin-top: 80px !important;
}

/* Tool cards - extra zakulacení */
.tool-card {
    border-radius: 24px !important;
    overflow: hidden !important;
}

.tool-card::before {
    border-radius: 24px 24px 0 0 !important;
}

.tool-card:hover {
    border-radius: 28px !important;
}

/* Feature cards */
.feature-card {
    border-radius: 22px !important;
}

/* CTA button */
.cta-button {
    border-radius: 18px !important;
}

/* Icons */
.card-icon,
.feature-icon {
    border-radius: 20px !important;
}

/* Tech badges */
.tech-badge {
    border-radius: 20px !important;
}

/* Mobile menu button */
.mobile-menu-button {
    border-radius: 50% !important;
}

.back-to-top {
    border-radius: 50% !important;
}

/* Responsivní zakulacení */
@media (max-width: 768px) {
    .main-container {
        border-radius: 24px !important;
        margin: 10px auto !important;
    }
    
    .app-header {
        border-radius: 24px 24px 20px 20px !important;
        margin: 0 10px 30px 10px !important;
    }
    
    .hero-section,
    .tools-section,
    .features-section,
    .cta-section {
        border-radius: 22px !important;
        margin: 0 10px 40px 10px !important;
    }
    
    .tool-card,
    .feature-card {
        border-radius: 20px !important;
    }
}

@media (max-width: 480px) {
    .main-container {
        border-radius: 20px !important;
        margin: 8px auto !important;
    }
    
    .app-header {
        border-radius: 20px 20px 16px 16px !important;
        margin: 0 8px 24px 8px !important;
    }
    
    .hero-section,
    .tools-section,
    .features-section,
    .cta-section {
        border-radius: 18px !important;
        margin: 0 8px 32px 8px !important;
    }
    
    .tool-card {
        border-radius: 18px !important;
    }
    
    .cta-button {
        border-radius: 16px !important;
    }
}