:root {
    --bg-primary: #0a0e27;
    --bg-secondary: #1a1f3a;
    --text-primary: #ffffff;
    --text-secondary: #6b7280;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-bg-hover: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glow-strong: rgba(59, 130, 246, 0.35);
    --glow-soft: rgba(139, 92, 246, 0.25);
    --shadow-soft: 0 20px 50px rgba(5, 10, 25, 0.45);
    --font-sans: 'Plus Jakarta Sans', sans-serif;
    --font-display: 'Space Grotesk', 'Plus Jakarta Sans', sans-serif;
}

.theme-light {
    --bg-primary: #b7c2d2;
    --bg-secondary: #9eacbf;
    --text-primary: #0a101b;
    --text-secondary: #151f33;
    --glass-bg: rgba(10, 16, 27, 0.18);
    --glass-bg-hover: rgba(10, 16, 27, 0.24);
    --glass-border: rgba(10, 16, 27, 0.34);
}

* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

body {
    font-family: var(--font-sans);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

.skip-link {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 10px 16px;
    border-radius: 999px;
    background: var(--accent-blue);
    color: #ffffff;
    font-weight: 600;
    z-index: 200;
    transform: translateY(-200%);
    transition: transform 0.2s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
    transform: translateY(0);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.error-message {
    display: none;
    margin-top: 6px;
    font-size: 0.875rem;
    color: #fca5a5;
}

.error-message.is-visible {
    display: block;
}

:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

#themeToggle,
.quick-reply-btn,
#lightboxPrev,
#lightboxNext {
    min-width: 44px;
    min-height: 44px;
}

/* Mobile chat fallback */
@supports not (height: 100dvh) {
    #chatWindow {
        height: min(550px, calc(100vh - 120px)) !important;
    }
}

/* Chat na úzkých obrazovkách */
@media (max-width: 400px) {
    #chatWindow {
        width: calc(100vw - 24px) !important;
        right: -12px !important;
    }
}

/* DVH fallback pro hero sekci */
.min-h-screen {
    min-height: 100vh;
    min-height: 100dvh;
}

/* Touch feedback */
@media (hover: none) {
    .btn-primary:active,
    .glass:active,
    button:active,
    a:active {
        transform: scale(0.97);
        opacity: 0.9;
    }

    .quick-reply-btn:active {
        transform: scale(0.95);
    }
}

/* Lepší scroll na iOS */
#messages {
    -webkit-overflow-scrolling: touch;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .float-animation, .reveal, .hero-orb {
        animation: none !important;
        transform: none !important;
    }

}
/* Android backdrop-filter fallback */
@supports not (backdrop-filter: blur(1px)) {
    #mobileMenu {
        background: rgba(0, 0, 0, 0.98) !important;
    }
    .glass {
        background: rgba(20, 25, 45, 0.95) !important;
    }
}

/* iOS Safe Area */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    .fixed.bottom-6 {
        bottom: calc(1.5rem + env(safe-area-inset-bottom));
    }
    #chatWindow {
        max-height: calc(100dvh - 120px - env(safe-area-inset-bottom));
    }
    footer {
        padding-bottom: calc(4rem + env(safe-area-inset-bottom));
    }
}

/* iOS input zoom prevention */
input, textarea, select {
    font-size: 16px !important;
}

/* Lightbox na mobilu */
@media (max-width: 640px) {
    .lightbox {
        padding: 0.5rem !important;
    }
    #closeLightbox {
        top: 1rem !important;
        right: 1rem !important;
        font-size: 2rem !important;
    }
    #lightboxControls {
        bottom: 1rem !important;
    }
    #lightboxPrev, #lightboxNext {
        width: 3rem !important;
        height: 3rem !important;
    }
}

/* Velmi male obrazovky */
@media (max-width: 360px) {
    h1.text-4xl {
        font-size: 1.75rem !important;
    }
    h2.text-4xl {
        font-size: 1.5rem !important;
    }
    .px-8 {
        padding-left: 1rem !important;
        padding-right: 1rem !important;
    }
    .px-6 {
        padding-left: 0.75rem !important;
        padding-right: 0.75rem !important;
    }
    .gap-4 {
        gap: 0.5rem !important;
    }
    .text-lg {
        font-size: 1rem !important;
    }
}

/* Stredne male obrazovky */
@media (max-width: 480px) {
    #chatWindow {
        width: calc(100vw - 1.5rem) !important;
        right: -0.75rem !important;
    }
}

/* Landscape mobily */
@media (max-height: 500px) and (orientation: landscape) {
    .min-h-screen {
        min-height: auto !important;
        padding: 2rem 0 !important;
    }
    #chatWindow {
        height: 80vh !important;
        max-height: 80vh !important;
    }
    .py-24 {
        padding-top: 3rem !important;
        padding-bottom: 3rem !important;
    }
}

/* Vylepseny touch feedback */
@media (hover: none) and (pointer: coarse) {
    .btn-primary:active,
    .btn-secondary:active {
        transform: scale(0.97);
        opacity: 0.9;
        transition: transform 0.1s, opacity 0.1s;
    }
    .portfolio-item:active {
        transform: scale(0.98);
    }
    .filter-btn:active {
        transform: scale(0.95);
    }
}

/* Disable tap highlight */
html {
    -webkit-tap-highlight-color: transparent;
}

#messages, .overflow-y-auto {
    overscroll-behavior: contain;
}


body::before,
body::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

body::before {
    background:
        radial-gradient(circle at 20% 10%, rgba(59, 130, 246, 0.15), transparent 50%),
        radial-gradient(circle at 85% 15%, rgba(139, 92, 246, 0.2), transparent 45%),
        radial-gradient(circle at 80% 80%, rgba(34, 211, 238, 0.2), transparent 55%),
        radial-gradient(circle at 10% 80%, rgba(59, 130, 246, 0.12), transparent 50%);
    opacity: 0.8;
    filter: blur(10px);
}

body::after {
    background-image: radial-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 0);
    background-size: 3px 3px;
    opacity: 0.2;
    mix-blend-mode: soft-light;
}

#neuralCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.4;
}

#cursorSpotlight {
    will-change: transform, opacity;
}

main {
    position: relative;
    z-index: 1;
}

header {
    z-index: 100;
}
header a.flex {    text-decoration: none;    color: inherit;    position: relative;    z-index: 101;}

header.is-scrolled {
    box-shadow: 0 16px 40px rgba(6, 10, 24, 0.45);
    background: rgba(9, 13, 32, 0.65);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 14px 40px rgba(8, 12, 30, 0.35);
    contain: layout style;
}

.glass:hover {
    background: var(--glass-bg-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.3);
    border-color: rgba(59, 130, 246, 0.3);
}

.gradient-text {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6, #22d3ee);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% 200%;
    animation: gradient 8s ease infinite;
}

.display-text {
    font-family: var(--font-display);
    letter-spacing: -0.02em;
    text-shadow: 0 20px 60px rgba(14, 20, 40, 0.45);
}

.section-title {
    font-family: var(--font-display);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    display: block;
    width: 72px;
    height: 4px;
    margin: 14px auto 0;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(59, 130, 246, 0.9), rgba(139, 92, 246, 0.9));
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.35);
}

.hero-ambient {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
    transform: translate3d(var(--hero-x, 0px), var(--hero-y, 0px), 0);
    transition: transform 0.2s ease;
    will-change: transform;
}

.hero-orb {
    position: absolute;
    border-radius: 999px;
    filter: blur(20px);
    opacity: 0.6;
    animation: float 10s ease-in-out infinite;
}

.hero-orb.one {
    width: 320px;
    height: 320px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.45), transparent 70%);
    top: 8%;
    left: 8%;
}

.hero-orb.two {
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.4), transparent 70%);
    top: 0%;
    right: 5%;
    animation-delay: -2s;
}

.hero-orb.three {
    width: 260px;
    height: 260px;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.4), transparent 70%);
    bottom: 5%;
    right: 25%;
    animation-delay: -4s;
}

@keyframes gradient {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.portfolio-item {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.06);
    box-shadow: var(--shadow-soft);
    transform-style: preserve-3d;
    contain: layout style paint;
}

.portfolio-item:hover {
    transform: scale(1.02) translateY(-4px);
    border-color: rgba(59, 130, 246, 0.35);
    box-shadow: 0 30px 70px rgba(10, 18, 40, 0.6);
}

.portfolio-item img {
    transition: transform 0.5s ease;
}

.portfolio-item:hover img {
    transform: scale(1.1);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.8), rgba(168, 85, 247, 0.8));
    opacity: 0;
    transition: opacity 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.portfolio-meta {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.85);
    background: rgba(0, 0, 0, 0.25);
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

html {
    scroll-behavior: smooth;
}

.filter-btn {
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.filter-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
    border-color: rgba(255, 255, 255, 0.2);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.nav-link:hover::after {
    transform: scaleX(1);
}

.btn-primary {
    box-shadow: 0 20px 40px var(--glow-strong);
}

.btn-primary:hover {
    transform: translateY(-2px) scale(1.02);
}

.btn-secondary {
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: linear-gradient(120deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
}

.chip {
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 12px 30px rgba(6, 12, 24, 0.4);
}

.btn-outline-glow {
    position: relative;
    overflow: hidden;
}

.btn-outline-glow::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    border: 1px solid rgba(59, 130, 246, 0.4);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.btn-outline-glow:hover::after {
    opacity: 1;
}

.card {
    position: relative;
    contain: layout style;
}

.card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
    pointer-events: none;
}

.card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.12), rgba(139, 92, 246, 0.1), transparent 60%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.card:hover::after {
    opacity: 1;
}

.section-wrap {
    position: relative;
}

.section-wrap::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 32px;
    background: radial-gradient(circle at 15% 10%, rgba(59, 130, 246, 0.16), transparent 45%),
        radial-gradient(circle at 85% 20%, rgba(139, 92, 246, 0.18), transparent 50%);
    opacity: 0.6;
    filter: blur(20px);
    pointer-events: none;
}

.reveal {
    opacity: 0;
    transform: translateY(24px) scale(0.98);
    transition: all 0.8s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.lightbox.active {
    display: flex;
}

.lightbox img {
    max-width: 90%;
    max-height: 90vh;
    object-fit: contain;
}

.chat-message {
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.typing-indicator {
    display: inline-flex;
    gap: 4px;
    padding: 12px 16px;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #60a5fa;
    animation: bounce 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(1) {
    animation-delay: -0.32s;
}

.typing-indicator span:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

.quick-reply-btn {
    transition: all 0.2s ease;
}

.quick-reply-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

.message-time {
    font-size: 10px;
    color: #9ca3af;
    margin-top: 4px;
}

.confidence-indicator {
    font-size: 10px;
    color: #60a5fa;
    margin-top: 2px;
}

.ai-suggestion {
    background: rgba(59, 130, 246, 0.1);
    border-left: 3px solid #3b82f6;
    padding: 8px 12px;
    margin-top: 8px;
    border-radius: 8px;
    font-size: 13px;
    animation: slideIn 0.3s ease-out;
}

.ai-suggestion.warning {
    background: rgba(251, 191, 36, 0.1);
    border-left-color: #fbbf24;
}

.ai-suggestion.success {
    background: rgba(34, 197, 94, 0.1);
    border-left-color: #22c55e;
}

.ai-generated-text {
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.3);
    padding: 12px;
    margin-top: 8px;
    border-radius: 8px;
    font-size: 14px;
    animation: slideIn 0.3s ease-out;
}

.ai-action-btn {
    background: rgba(59, 130, 246, 0.2);
    border: 1px solid rgba(59, 130, 246, 0.4);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
    margin-right: 8px;
    margin-top: 8px;
    display: inline-block;
}

.ai-action-btn:hover {
    background: rgba(59, 130, 246, 0.4);
    transform: translateY(-1px);
}

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

/* Mobile Menu Animations */
#mobileMenu.active {
    opacity: 1 !important;
    visibility: visible !important;
}

#mobileMenuBtn.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

#mobileMenuBtn.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

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

.mobile-menu-link {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.5s ease forwards;
}

.mobile-menu-link:nth-child(1) { animation-delay: 0.1s; }
.mobile-menu-link:nth-child(2) { animation-delay: 0.2s; }
.mobile-menu-link:nth-child(3) { animation-delay: 0.3s; }
.mobile-menu-link:nth-child(4) { animation-delay: 0.4s; }

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

/* Mesh Gradient Background */
.mesh-gradient {
    background:
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.3) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(139, 92, 246, 0.3) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(34, 211, 238, 0.3) 0px, transparent 50%),
        radial-gradient(at 0% 100%, rgba(59, 130, 246, 0.3) 0px, transparent 50%);
    animation: meshMove 15s ease infinite;
}

@keyframes meshMove {
    0%, 100% { background-position: 0% 0%, 100% 0%, 100% 100%, 0% 100%; }
    25% { background-position: 100% 0%, 100% 100%, 0% 100%, 0% 0%; }
    50% { background-position: 100% 100%, 0% 100%, 0% 0%, 100% 0%; }
    75% { background-position: 0% 100%, 0% 0%, 100% 0%, 100% 100%; }
}

/* Floating Animation */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.float-animation {
    animation: float 6s ease-in-out infinite;
}
.theme-light .text-gray-200 { color: #26344a; }
.theme-light .text-gray-300 { color: #324258; }
.theme-light .text-gray-400 { color: #3e5168; }
.theme-light .text-gray-500 { color: #4a5e77; }
.theme-light .text-blue-300 { color: #1a46c4; }
.theme-light .text-blue-400 { color: #163da9; }
.theme-light .bg-white\/10 { background-color: rgba(10, 16, 27, 0.18); }
.theme-light .bg-white\/20 { background-color: rgba(10, 16, 27, 0.24); }
.theme-light .border-white\/10 { border-color: rgba(10, 16, 27, 0.34); }