/* style.css (Verze s vylepšeným accordionem UX) */

/* --- Definice barev a fontů --- */
:root {
    --primary-color: #5D2D8E;
    --secondary-color: #E9E4FF;
    --primary-button-text-color: #FFFFFF;
    --text-color: #000000;
    --background-color: #FFFFFF;
    --container-background: #FFFFFF;
    --border-color: #EEEEEE;
    --input-border-color: #CCCCCC;
    --input-focus-border-color: var(--primary-color);
    --input-focus-shadow: rgba(93, 45, 142, 0.25);
    --link-color: var(--primary-color);
    --success-text-color: #155724;
    --success-bg-color: #d4edda;
    --success-border-color: #c3e6cb;
    --error-text-color: #721c24;
    --error-bg-color: #f8d7da;
    --error-border-color: #f5c6cb;
    --loader-color: var(--primary-color);
    --help-button-bg: transparent;
    --help-button-text: var(--primary-color);
    --help-button-border: var(--primary-color);
    --help-button-hover-bg: rgba(93, 45, 142, 0.05);
    --code-bg-color: #f0f0f0;
    --help-section-bg: #f8f9fa;
    --lightbox-bg: rgba(0, 0, 0, 0.8);
    --lightbox-close-color: #FFFFFF;
    /* Accordion Barvy */
    --accordion-header-bg: #f8f6fc; /* Výchozí pozadí záhlaví (velmi světle fialová) */
    --accordion-header-hover-bg: #ede9f7; /* Tmavší fialový nádech pro hover/focus */
    --accordion-icon-color: var(--primary-color); /* Barva ikony + / - */
    --accordion-border-color: #dcd1ea; /* Fialovější border mezi položkami a kolem */
    --accordion-content-bg: #FFFFFF; /* Pozadí obsahu (může být stejné jako kontejner) */
}

/* --- Google Font Poppins (volitelné) --- */
/* @import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&display=swap'); */

/* --- Základní styly --- */
body {
    /* font-family: 'Poppins', sans-serif; */
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    margin: 0;
    padding: 40px 20px;
    box-sizing: border-box;
    line-height: 1.6;
}

.container {
    background-color: var(--container-background);
    padding: 70px 40px 30px 40px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    max-width: 550px;
    width: 100%;
    text-align: center;
    border: 1px solid var(--border-color);
    margin-top: 20px;
    position: relative;
}

/* --- Nadpisy a Texty --- */
h1, h2 { color: var(--primary-color); margin-top: 0; margin-bottom: 25px; font-weight: 600; }
h1 { margin-bottom: 35px; }
h2 { margin-top: 30px; font-size: 1.5em; }
p { color: var(--text-color); margin-bottom: 15px; text-align: left; }
p strong { font-weight: 600; color: inherit; }
p.small-text { font-size: 0.9em; color: #555; margin-top: 15px; line-height: 1.5; }
p.success-inline { color: var(--success-text-color); font-weight: 500; text-align: center; margin-bottom: 20px; }
a, a:visited { color: var(--link-color); text-decoration: none; font-weight: 500; }
a:hover { text-decoration: underline; }
code { background-color: var(--code-bg-color); padding: 2px 6px; border-radius: 4px; font-family: monospace; font-size: 0.95em; }

/* --- Formulářové prvky --- */
label { display: block; margin-bottom: 8px; color: var(--text-color); font-weight: 500; text-align: left; font-size: 0.95em; }
input[type="email"], input[type="text"], textarea { width: 100%; padding: 12px 15px; margin-bottom: 20px; border: 1px solid var(--input-border-color); border-radius: 6px; font-size: 1em; box-sizing: border-box; transition: border-color 0.2s ease, box-shadow 0.2s ease; font-family: inherit; line-height: 1.5; }
input[type="email"]:focus, input[type="text"]:focus, textarea:focus { border-color: var(--input-focus-border-color); outline: 0; box-shadow: 0 0 0 0.2rem var(--input-focus-shadow); }
input.invalid, textarea.invalid { border-color: var(--error-text-color); }
input.invalid:focus, textarea.invalid:focus { box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25); }
textarea { resize: vertical; min-height: 80px; }

/* --- Tlačítka --- */
button, .button-primary, .button-secondary { padding: 12px 25px; border: none; border-radius: 6px; cursor: pointer; font-size: 1em; font-weight: 500; transition: background-color 0.3s ease, transform 0.1s ease, border-color 0.3s ease; display: inline-flex; align-items: center; justify-content: center; width: auto; min-width: 150px; margin-top: 10px; margin-right: 10px; text-decoration: none; line-height: 1.5; vertical-align: middle; }
button:last-of-type, .button-primary:last-of-type, .button-secondary:last-of-type { margin-right: 0; }
.button-primary { background-color: var(--primary-color); color: var(--primary-button-text-color); border: 1px solid var(--primary-color); }
.button-primary:hover { background-color: #4a2472; border-color: #4a2472; }
.button-primary:disabled { background-color: #a48bbf; border-color: #a48bbf; cursor: not-allowed; opacity: 0.8; }
.button-secondary { background-color: #FFFFFF; color: var(--primary-color); border: 1px solid var(--primary-color); }
.button-secondary:hover { background-color: rgba(93, 45, 142, 0.05); }
button:active { transform: scale(0.98); }

/* Tlačítko Pomoci */
.help-button { position: absolute; top: 15px; right: 15px; background-color: var(--help-button-bg); color: var(--help-button-text); border: 1px solid var(--help-button-border); padding: 6px 12px; font-size: 0.85em; min-width: auto; margin: 0; border-radius: 20px; }
.help-button:hover { background-color: var(--help-button-hover-bg); }

/* --- Zprávy a Notifikace --- */
.message { padding: 15px 20px; margin-bottom: 25px; border-radius: 6px; font-weight: 500; border: 1px solid transparent; text-align: left; font-size: 0.95em; }
.message.error { background-color: var(--error-bg-color); color: var(--error-text-color); border-color: var(--error-border-color); }
.message.success { background-color: var(--success-bg-color); color: var(--success-text-color); border-color: var(--success-border-color); }

/* --- Loader --- */
.loader { border: 3px solid rgba(0, 0, 0, 0.1); border-top: 3px solid var(--loader-color); border-radius: 50%; width: 18px; height: 18px; animation: spin 0.8s linear infinite; display: inline-block; margin-left: 10px; vertical-align: middle; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* --- Oddělovač --- */
hr { border: 0; height: 1px; background-color: var(--border-color); margin: 35px 0; }
hr.help-hr { margin: 25px 0; }

/* --- Návod na kopírování přezdívky (Obrázky) --- */
.image-guide { display: flex; justify-content: space-around; align-items: flex-start; margin: 20px 0; flex-wrap: wrap; gap: 20px; }
.image-guide-item { text-align: center; max-width: 45%; min-width: 150px; }
.image-guide img.lightbox-trigger { display: block; max-width: 100%; height: auto; border: 1px solid var(--border-color); border-radius: 4px; margin-top: 5px; cursor: pointer; transition: transform 0.2s ease, box-shadow 0.2s ease; }
.image-guide img.lightbox-trigger:hover { transform: scale(1.03); box-shadow: 0 4px 10px rgba(0,0,0,0.1); }
.image-caption { font-weight: 500; margin-bottom: 5px; text-align: center; }
.image-caption-detail { text-align: center; margin-top: 0; }

/* --- Sekce pro žádost o pomoc (Inline) --- */
.help-section { background-color: var(--help-section-bg); border: 1px solid var(--border-color); border-radius: 6px; padding: 20px 30px; margin-top: 10px; margin-bottom: 30px; text-align: left; }
.help-section h2 { text-align: center; margin-top: 0; margin-bottom: 15px; font-size: 1.3em; }
.help-section label { margin-top: 10px; }
.help-section button { width: 100%; margin-top: 15px; }
.help-section .loader { margin: 0 auto; display: block; margin-top: 15px; }

/* --- Styly pro Accordion (Rozbalovací návody) --- VYLEPŠENÉ UX --- */
.accordion {
    margin: 25px 0;
    border: 1px solid var(--accordion-border-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.accordion-item {
    border-bottom: 1px solid var(--accordion-border-color);
}
.accordion-item:last-child {
    border-bottom: none;
}

.accordion-header { /* Toto je <summary> tag */
    display: flex;
    align-items: center;
    width: 100%;
    padding: 16px 20px; /* Upraven padding */
    cursor: pointer;
    background-color: var(--accordion-header-bg); /* Výchozí pozadí */
    font-weight: 600;
    color: var(--primary-color);
    list-style: none; /* Skrýt výchozí šipku */
    transition: background-color 0.2s ease;
    position: relative;
    box-sizing: border-box;
    text-align: left;
    border: none;
    outline: none;
}
.accordion-header::-webkit-details-marker,
.accordion-header::marker {
    display: none;
    content: "";
}

.accordion-header:hover,
.accordion-header:focus {
    background-color: var(--accordion-header-hover-bg); /* Tmavší při hover/focus */
    outline: none; /* Odstranit defaultní outline */
}
/* Vizuální focus styl pro přístupnost */
.accordion-header:focus-visible {
     box-shadow: inset 0 0 0 2px var(--primary-color); /* Vnitřní linka pro focus */
     /* Nebo použít vnější: */
     /* box-shadow: 0 0 0 2px var(--container-background), 0 0 0 4px var(--primary-color); */
     /* z-index: 1; */ /* Potřeba jen pro vnější box-shadow */
}

.accordion-icon {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    margin-right: 15px;
    font-size: 1.2em;
    font-weight: bold;
    color: var(--accordion-icon-color);
    width: 22px; /* Mírně širší pro lepší vizuální váhu */
    height: 22px;
    line-height: 1;
    flex-shrink: 0;
    background-color: rgba(93, 45, 142, 0.1); /* Lehké pozadí ikony */
    border-radius: 50%; /* Udělat ikonu kulatou */
    transition: transform 0.3s ease-in-out, background-color 0.2s ease; /* Přidána transition pro pozadí */
}
/* Změna pozadí ikony při hover/focus na hlavičce */
.accordion-header:hover .accordion-icon,
.accordion-header:focus .accordion-icon {
    background-color: rgba(93, 45, 142, 0.2);
}

/* Ikony + a - */
.accordion-item .accordion-header .accordion-icon::before {
    content: '+';
    display: block;
    transform-origin: center center; /* Rotace kolem středu */
    transition: transform 0.3s ease-in-out;
}
.accordion-item[open] > .accordion-header .accordion-icon::before {
    content: '−'; /* Používá se minus, ne pomlčka */
    transform: rotate(180deg); /* Otočení pro vizuální efekt */
}

.accordion-content {
    padding: 20px 25px 25px 25px;
    background-color: var(--accordion-content-bg);
    text-align: left;
    animation: fadeIn 0.4s ease-out; /* Mírně delší animace */
    border-top: 1px solid var(--accordion-border-color);
}
.accordion-content ol { padding-left: 20px; margin-top: 0; margin-bottom: 15px; }
.accordion-content li { margin-bottom: 8px; }
.accordion-image { text-align: center; margin-top: 15px; padding: 0; }
.accordion-image img { max-width: 90%; margin-left: auto; margin-right: auto; display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }
.accordion-content .image-guide { margin: 15px 0 0 0; justify-content: center; }
.accordion-content .image-guide-item { max-width: 100%; min-width: auto; }
.accordion-content .image-guide-item .image-caption { display: none; }


/* --- Styly pro Lightbox --- */
.lightbox-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: var(--lightbox-bg); display: flex; justify-content: center; align-items: center; z-index: 1001; opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0s linear 0.3s; padding: 20px; box-sizing: border-box; cursor: pointer; }
.lightbox-overlay.visible { opacity: 1; visibility: visible; transition: opacity 0.3s ease; }
.lightbox-image { display: block; max-width: 90%; max-height: 90%; width: auto; height: auto; object-fit: contain; box-shadow: 0 10px 30px rgba(0,0,0,0.4); border-radius: 4px; cursor: default; }
.lightbox-close-btn { position: absolute; top: 15px; right: 25px; color: var(--lightbox-close-color); font-size: 2.5em; font-weight: bold; cursor: pointer; line-height: 1; transition: color 0.2s ease; z-index: 1002; }
.lightbox-close-btn:hover { color: #ccc; }

/* Skrývání elementů */
[style*="display: none;"] { display: none !important; }