@import url('https://fonts.googleapis.com/css2?family=Solitreo&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Inter&family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700;1,900&display=swap');

/*Obsah*/
:root {
    --primary-accent: #e7621f; /* Ta specifická oranžová */
    --white: #f1f1f1;     /* Antracitová */
    --light-bg: #494949;      /* Světlé šedé pozadí pro sekce */
    --black: rgba(0, 0, 0, 0.8);
}

body {
    font-family: 'Montserrat', sans-serif;
    line-height: 1.7;
    color: var(--white);
    margin: 0;
    padding: 0;
    background-color: var(--black);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 25px;
}

/* Header */
header {
    padding: 80px 0 30px 0;
    text-align: center;
}

h1 {
    font-size: 3.2rem;
    color: var(--white);
    margin-bottom: 5px;
    font-weight: 700;
    text-transform: uppercase;
}

.subtitle {
    font-size: 1.3rem;
    color: var(--primary-accent);
    font-weight: 400;
    letter-spacing: 1px;
}

/* Hero sekce */
.hero {
    padding: 50px 0;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.book-cover {
    max-width: 80%;
    max-height: auto;
    box-shadow: 20px 20px 0px var(--primary-accent); /* Stylový stín v barvě brandu */
    border-radius: 2px;
}

.hero-text p {
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    background-color: var(--primary-accent);
    color: var(--black);
    padding: 18px 35px;
    text-decoration: none;
    border-radius: 0; /* Ostré rohy pro modernější vzhled */
    font-weight: 700;
    text-transform: uppercase;
    transition: all 0.3s ease;
}

.btn:hover {
    background-color: var(--white);
    transform: translateY(-3px);
}

/* Detaily */
.details {
    background-color: var(--white);
    color: var(--black);
    padding: 50px 0;
    text-align: center;
}

/* Vlastnosti / Co v knize najdete */
.features {
    padding: 80px 0;
}

.features h2 {
    color: var(--white);
    border-bottom: 4px solid var(--primary-accent);
    display: inline-block;
    padding-bottom: 10px;
    margin-bottom: 40px;
}

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

.feature-item {
    background: var(--light-bg);
    padding: 30px;
    border-top: 4px solid var(--primary-accent);
    transition: transform 0.2s;
}

.feature-item:hover {
    transform: scale(1.02);
}

.observation {
    margin-top: 50px;
    padding: 30px;
    background-color: #5a5a5a;
    border-left: 4px solid var(--primary-accent);
    font-style: italic;
}

/* Sekce Pro koho */
.for-whom {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.for-whom h2 {
    color: var(--primary-accent);
}

.for-whom ul {
    list-style: none;
    padding: 0;
}

.for-whom li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
}

.for-whom li::before {
    content: "➔";
    position: absolute;
    left: 0;
    color: var(--primary-accent);
}

/* Footer / Prodej */
footer {
    padding: 80px 0;
    text-align: center;
    border-top: 1px solid #eee;
}

/* Responzivita */
@media (max-width: 850px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .book-cover {
        max-width: 100%;
        margin-bottom: 30px;
        /*box-shadow: 10px 10px 0px var(--primary-accent);*/
        box-shadow: none;
    }
    h1 {
        font-size: 2.2rem;
    }
}








/*NAVIGACE*/
.start-logos{
    position: absolute;
    display: flex;
    top: 3em;
    left: 1.5em;
    gap: 1.1em;
}
.start-logos img{
    width: 20px;
}

.start-logos img:hover{
    cursor: pointer;
}

nav{
    width: 100%;
    max-height: 140px;
    background-color: transparent;
    top: 0;
}

.nav-toggle{
    display: none;
}

.nav-toggle-label{
    position: fixed;
    right: 2em;
    top: 3em;
    z-index: 1000;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after{
    display: block;
    background: white;
    height: 2px;
    width: 1.5em;
    border-radius: 2px;
    position: relative;
    transition: all .1s ease-in-out;
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
    content: '';
    position: absolute;
    transition: all .2s ease-in-out;
}

.nav-toggle-label span::before{
    bottom: 7px;
}
.nav-toggle-label span::after{
    top: 7px;
}

.margin-top-nav{
    margin-top: 5em !important;
}
.grid ul{
    position: fixed;
    text-align: left;
    background: #333333;
    right: 0;
    top: 0;
    width: 70%;
    height: 100vh;
    z-index: 500;
    margin-top: 0;
    transform: scale(0, 1);
    transform-origin: right;
    transition: transform .5s ease-in-out;
    list-style: none;
    padding: 0;
}

.grid ul li, .grid ul a{
    text-decoration: none;
    color: white;
    opacity: 0;
    font-size: 16px;
    text-transform: uppercase;
    transition: opacity .1s ease-in-out;
    margin-top: 2em;
    transition: .5s;
    font-family: "Roboto", sans-serif;
}

.grid ul li, .grid ul a:hover{
    color: #e7621f;
}

.grid li img{
    width: 16px;
    height: 16px;
    margin-left: 1em;
    margin-right: 1em;
}

.nav-toggle:checked ~ #ul-navigace{
    transform: scale(1, 1);
}

.nav-toggle:checked ~ #ul-navigace a, #ul-navigace li{
    opacity: 1;
    transition: opacity .2s ease-in-out .4s;
}

.nav-toggle:checked ~ .nav-toggle-label span{
    transform: translateX(-20px);
    background: transparent;
    box-shadow: none;
}

.nav-toggle:checked ~ .nav-toggle-label span::before {
    transform: rotate(45deg) translate(25px, -15px);
}
.nav-toggle:checked ~ .nav-toggle-label span::after {
    transform: rotate(-45deg) translate(25px, 15px);
}
/* ---------------------------------------------------------- */
.overlay{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity .35s, visibility .35s, height .35s;
    overflow: hidden;
    background: black;
}

.nav-toggle:checked ~ .overlay{
    visibility: visible;
    opacity: 0.4;
}
.nav-toggle:checked ~ html{
    margin: 0;
    height: 100%;
    overflow: hidden;
}

/* Logo */
.logoIMG{
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 2px solid rgba(231, 98, 31, 0.5);
}
.logoIMG img{
    height: auto;
    width: 150px;
    margin: 0.5em 0 0.5em 0;
}


@media (min-width:840px) {
    /* Navigace */
    .nav-toggle-label{
        display: none;
    }
    .sticky{
        position: fixed !important;
        top: 0 !important;
        width: 100% !important;
        padding: 1em 0 1.5em 0 !important;
        background: #333333;
        border-top: 2px solid rgba(231, 98, 31, 0.5) !important;
        border-bottom: 2px solid rgba(231, 98, 31, 0.5) !important;
    }

    .start-logos{
        position: absolute;
        top: 4em;
        left: auto;
        right: 3.5em;
        display: flex;
        gap: 1em;
    }
    .start-logos img{
        width: 25px;
    }
    /* ------------------------------ */
    nav{
        position: static;
        justify-content: center;
        align-items: center;
        top: 0;
        z-index: 99;
        border-bottom: 2px solid rgba(231, 98, 31, 0.5);
        border-top: 2px solid rgba(231, 98, 31, 0.5);
    }

    .margin-top-nav{
    margin-top: 0 !important;
}

    .grid ul{
        position: static;
        display: flex;
        justify-content: center;
        width: 100%;
        transform: scale(1, 1);
        padding: 1em 0 .5em 0;
        height: auto;
    }
    .grid ul a, .grid ul li{
        opacity: 1;
        margin-left: .5em;
        margin-right: .5em;
        margin-top: 0;
    }

    .grid li img{
        display: none;
    }

    .margin-top-nav{
        margin: 0;
    }

    /* Logo */
    .logoIMG{
        border-bottom: none;
        margin-bottom: 1em;
        display: flex;
    }
    .logoIMG img{
        width: 200px;
        height: auto;
    }
}

@media (min-width:1024px) {
    /* Navigace */
    .grid ul {
        text-align: center;
    }

    .grid ul a, .grid ul li {
        opacity: 1;
        margin: 0;
    }

    .grid li img {
        display: block;
        padding-top: 0.3em;
    }

    .grid ul a {
        display: flex;
    }
}

@media (min-width: 1440px){
    .grid ul li, .grid ul a{
        font-size: 20px;
    }
}