*,
*::before,
*::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
}

:root {
    --bg-dark: #050509;
    --bg-light: #f5f5f7;
    --fg-dark: #f9fafb;
    --fg-light: #111827;
    --accent: #e11d48;
    --accent-soft: rgba(225, 29, 72, 0.18);
    --border-subtle-dark: #1f2937;
    --border-subtle-light: #e5e7eb;
    --card-dark: #0b0b11;
    --card-light: #ffffff;

    --radius-xl: 18px;
    --shadow-soft-dark: 0 18px 45px rgba(0, 0, 0, 0.7);
    --shadow-soft-light: 0 18px 45px rgba(15, 23, 42, 0.08);
}

/* LIGHT / DARK THEME */

body.theme-dark {
    background: radial-gradient(circle at top, #111827 0, #020617 45%, #000000 100%);
    color: var(--fg-dark);
}

body.theme-light {
    background: radial-gradient(circle at top, #ffffff 0, #e5e7eb 40%, #d1d5db 100%);
    color: var(--fg-light);
}

body {
    margin: 0;
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Layout helpers */

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* HEADER */

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(12px);
}

body.theme-dark .site-header {
    background: rgba(3, 7, 18, 0.9);
    border-bottom: 1px solid var(--border-subtle-dark);
}

body.theme-light .site-header {
    background: rgba(249, 250, 251, 0.9);
    border-bottom: 1px solid var(--border-subtle-light);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
}

.logo img {
    width: 34px;
    height: 34px;
    object-fit: contain;
}

body.theme-dark .logo span {
    color: var(--fg-dark);
}

body.theme-light .logo span {
    color: var(--fg-light);
}

.logo span {
    font-weight: 800;
    letter-spacing: 0.15em;
    font-size: 0.9rem;
}

.main-nav {
    display: flex;
    gap: 1.5rem;
    font-size: 0.9rem;
}

.main-nav a {
    text-decoration: none;
    position: relative;
    padding-bottom: 2px;
}

body.theme-dark .main-nav a {
    color: #9ca3af;
}

body.theme-light .main-nav a {
    color: #4b5563;
}

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

.main-nav a.active {
    color: var(--accent);
}

.main-nav a.active::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 18px;
    height: 2px;
    border-radius: 999px;
    background: var(--accent);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.theme-toggle {
    border: none;
    border-radius: 999px;
    width: 36px;
    height: 36px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

body.theme-dark .theme-toggle {
    background: #020617;
    color: #e5e7eb;
    box-shadow: 0 0 0 1px #111827;
}

body.theme-light .theme-toggle {
    background: #e5e7eb;
    color: #111827;
    box-shadow: 0 0 0 1px #cbd5f5;
}

/* HERO */

.hero {
    padding: 3.5rem 0 2.5rem;
}

.hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 3rem;
    align-items: center;
}

.hero-text h1 {
    font-size: clamp(3rem, 6vw, 4.2rem);
    margin: 0 0 0.6rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

body.theme-dark .hero-text h1 {
    color: #f9fafb;
}

body.theme-light .hero-text h1 {
    color: #030712;
}

.subtitle {
    margin: 0 0 1.5rem;
    line-height: 1.6;
    max-width: 32rem;
    opacity: 0.9;
}

.hero-actions {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.btn {
    border-radius: 999px;
    padding: 0.65rem 1.4rem;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    font-weight: 500;
    transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}

.btn.primary {
    background: var(--accent);
    color: #f9fafb;
    box-shadow: 0 14px 30px rgba(225, 29, 72, 0.45);
}

.btn.primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 18px 40px rgba(225, 29, 72, 0.6);
}

body.theme-dark .btn.ghost {
    background: transparent;
    color: #e5e7eb;
    box-shadow: 0 0 0 1px #1f2937;
}

body.theme-light .btn.ghost {
    background: transparent;
    color: #111827;
    box-shadow: 0 0 0 1px #d1d5db;
}

.btn.ghost:hover {
    transform: translateY(-1px);
}

.socials {
    display: flex;
    gap: 0.75rem;
}

.social-link {
    width: 36px;
    height: 36px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 1.05rem;
}

body.theme-dark .social-link {
    background: #020617;
    color: #e5e7eb;
    box-shadow: 0 0 0 1px #1f2937;
}

body.theme-light .social-link {
    background: #e5e7eb;
    color: #111827;
    box-shadow: 0 0 0 1px #d1d5db;
}

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

/* HERO IMAGE */

.hero-image {
    display: flex;
    justify-content: flex-end;
}

.hero-photo-placeholder {
    width: 100%;
    max-width: 360px;
    aspect-ratio: 3/4;
    border-radius: 32px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    padding: 1.2rem;
    box-sizing: border-box;
}

body.theme-dark .hero-photo-placeholder {
    background:
        linear-gradient(145deg, rgba(225, 29, 72, 0.45), rgba(59, 130, 246, 0.25)),
        url("../img/hero.jpg") center/cover no-repeat;
    box-shadow: var(--shadow-soft-dark);
    color: #f9fafb;
}

body.theme-light .hero-photo-placeholder {
    background:
        linear-gradient(145deg, rgba(225, 29, 72, 0.22), rgba(37, 99, 235, 0.12)),
        url("../img/hero.jpg") center/cover no-repeat;
    box-shadow: var(--shadow-soft-light);
    color: #111827;
}

/* ABOUT */

.about {
    padding: 1rem 0 3rem;
}

.about h2 {
    font-size: 1.4rem;
    margin-bottom: 0.75rem;
}

.about p {
    line-height: 1.7;
    max-width: 40rem;
    margin-bottom: 0.75rem;
}

.about a {
    color: var(--accent);
    text-decoration: none;
}

.about a:hover {
    text-decoration: underline;
}

/* FOOTER */

.site-footer {
    margin-top: auto;
}

body.theme-dark .site-footer {
    border-top: 1px solid var(--border-subtle-dark);
    background: rgba(3, 7, 18, 0.98);
}

body.theme-light .site-footer {
    border-top: 1px solid var(--border-subtle-light);
    background: rgba(249, 250, 251, 0.98);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.7rem 0;
    font-size: 0.85rem;
}

.footer-socials {
    display: flex;
    gap: 0.5rem;
}

/* NAVIGACE – stejná na PC i mobilu */

.main-nav {
    display: flex;
    gap: 1.5rem;
    margin-left: auto;
    font-size: 0.9rem;
}

.main-nav a {
    text-decoration: none;
    position: relative;
    padding-bottom: 2px;
}

@media (max-width: 768px) {

    .header-inner {
        flex-wrap: wrap;
        justify-content: center;   /* věci pěkně doprostřed */
        column-gap: 0.8rem;
        row-gap: 0.4rem;
        padding: 0 1rem;
    }

    .logo {
        margin-right: 0;
    }

    .main-nav {
        flex-wrap: wrap;
        justify-content: center;
        margin-left: 0;
        width: 100%;
        text-align: center;
    }

    .theme-toggle {
        margin-left: 0;
    }
}

/* Tlačítko pro mobilní menu */
.nav-toggle {
    border: none;
    border-radius: 999px;
    width: 36px;
    height: 36px;
    cursor: pointer;
    display: none; /* na desktopu skryté */
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

body.theme-dark .nav-toggle {
    background: #020617;
    color: #e5e7eb;
    box-shadow: 0 0 0 1px #111827;
}

body.theme-light .nav-toggle {
    background: #e5e7eb;
    color: #111827;
    box-shadow: 0 0 0 1px #cbd5f5;
}

.hero-photo-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 32px;
    display: block;
}