body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #F9FAFB;
    color: #111827;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

.header {
    background: white;
    border-bottom: 1px solid #E5E7EB;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-weight: bold;
    font-size: 20px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 25px;
}

nav a {
    text-decoration: none;
    color: #111827;
    font-weight: 500;
}

/* CTA BUTTON */
.btn {
    padding: 10px 18px;
    border-radius: 6px;
    border: 1px solid #111827;
}

.btn.primary {
    background: #10B981;
    color: white;
    border: none;
}

.hero {
    padding: 80px 0;
    background: white;
}

.hero-inner {
    display: flex;
    align-items: center;
    gap: 40px;
}

.hero-text h1 {
    font-size: 42px;
    margin-bottom: 20px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.card, .project {
    background: white;
    padding: 25px;
    border-radius: 8px;
    border: 1px solid #E5E7EB;
}

.about-inner {
    display: flex;
    align-items: center;
    gap: 40px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-width: 500px;
}

input, textarea {
    padding: 12px;
    border-radius: 6px;
    border: 1px solid #D1D5DB;
}

/*
.footer {
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
    background: #111827;
    color: white;
}
*/

/* odlehceny footer */

.footer {
    text-align: center;
    padding: 25px 0;
    margin-top: 40px;
    background: #F3F4F6;
    color: #4B5563;
    border-top: 1px solid #E5E7EB;
    font-size: 14px;
}

body.dark .footer {
    background: #1F2937;
    color: #D1D5DB;
    border-top: 1px solid #374151;
}


/* images */
img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 6px;
}

.project img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 6px 6px 0 0;
}

.about-img img {
    width: 280px;
    height: 280px;
    object-fit: cover;
    border-radius: 50%;
}

.hero-img img {
    width: 100%;
    max-width: 450px;
    height: auto;
    object-fit: cover;
}

/* responsive */
@media (max-width: 900px) {
    .hero-inner,
    .about-inner,
    .contact-inner {
        flex-direction: column;
        text-align: center;
    }

    .grid-3 {
        grid-template-columns: 1fr;
    }

    .grid-2 {
        grid-template-columns: 1fr;
    }

    nav ul {
        gap: 15px;
    }

    .hero-img img {
        max-width: 300px;
    }
}

@media (max-width: 600px) {
    .nav {
        flex-direction: column;
        gap: 10px;
    }

    .logo {
        font-size: 18px;
    }

    .hero-text h1 {
        font-size: 32px;
    }

    .about-img img {
        width: 200px;
        height: 200px;
    }
}

/* dark mode */
body.dark {
    background: #111827;
    color: #F9FAFB;
}

body.dark .header {
    background: #1F2937;
    border-bottom-color: #374151;
}

body.dark .card,
body.dark .project,
body.dark .contact-form input,
body.dark .contact-form textarea {
    background: #1F2937;
    border-color: #374151;
    color: #F9FAFB;
}

body.dark .btn {
    border-color: #F9FAFB;
}

body.dark .btn.primary {
    background: #10B981;
}

/* hero dark */
body.dark .hero {
    background: #1F2937;
}

body.dark .hero-text h1,
body.dark .hero-text p {
    color: #F9FAFB;
}

/* nav dark */
body.dark nav a {
    color: #F9FAFB;
}

body.dark nav a.btn {
    border-color: #F9FAFB;
    color: #F9FAFB;
}

body.dark nav a.btn:hover {
    background: #374151;
}

/* active menu item (underline) */
nav a.active {
    color: inherit;
    font-weight: 600;
    border-bottom: 2px solid currentColor;
    padding-bottom: 2px;
}

body.dark nav a.active {
    color: #F9FAFB;
}

/* dark mode button */
.btn.small {
    padding: 6px 12px;
    font-size: 14px;
    border-radius: 6px;
}

#darkToggle {
    background: #F3F4F6;
    color: #111827;
    border: 1px solid #D1D5DB;
}

#darkToggle:hover {
    background: #E5E7EB;
}

body.dark #darkToggle {
    background: #374151;
    color: #F9FAFB;
    border: 1px solid #4B5563;
}

body.dark #darkToggle:hover {
    background: #4B5563;
}

/* card hover */
.card {
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

body.dark .card:hover {
    box-shadow: 0 8px 20px rgba(0,0,0,0.4);
}

/* CTA section */
.cta {
    text-align: center;
    padding: 80px 0;
    background: #F3F4F6;
}

body.dark .cta {
    background: #1F2937;
}

/* FINAL CTA ACTIVE FIX */
nav li a.btn.active {
    font-weight: 600 !important;
    border-bottom: none !important;
    padding-bottom: 10px !important;
    background: #E5E7EB;
    color: #111827;
    border-color: #D1D5DB;
}

body.dark nav li a.btn.active {
    font-weight: 600 !important;
    border-bottom: none !important;
    padding-bottom: 10px !important;
    background: #374151;
    color: #F9FAFB;
    border-color: #4B5563;
}

/* ZJEMNĚNÉ CTA BUTTONY – LIGHT MODE */
.btn.primary {
    background: #4ADE80; /* jemnější zelená */
    color: white;
    border: none;
    transition: background 0.25s ease, box-shadow 0.25s ease;
}

.btn.primary:hover {
    background: #22C55E; /* o chlup tmavší */
    box-shadow: 0 0 12px rgba(34, 197, 94, 0.35); /* jemný odlesk */
}

/* DARK MODE */
body.dark .btn.primary {
    background: #16A34A; /* tlumenější */
    color: white;
}

body.dark .btn.primary:hover {
    background: #22C55E;
    box-shadow: 0 0 12px rgba(34, 197, 94, 0.45);
}

/* language switch */
.lang-switch {
    display: flex;
    gap: 10px;
    align-items: center;
}

.lang-switch img {
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.lang-switch img:hover {
    opacity: 1;
}

/* sticky footer */
html, body {
    height: 100%;
}

body {
    display: flex;
    flex-direction: column;
}

footer.footer {
    margin-top: auto;
}

/* nice CTA work with me */
/* Výchozí stav – jemný stín */
.btn.primary {
    background: #4ADE80;
    color: white;
    border: none;
    transition: background 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

/* Hover – silnější stín + lehké nadzvednutí */
.btn.primary:hover {
    background: #22C55E;
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    transform: translateY(-3px);
}

/* DARK MODE */
body.dark .btn.primary {
    background: #16A34A;
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}

body.dark .btn.primary:hover {
    background: #22C55E;
    box-shadow: 0 8px 20px rgba(0,0,0,0.55);
    transform: translateY(-3px);
}

.btn {
    display: inline-block;
}

.btn.primary {
    display: inline-block;
}