@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Google+Sans:ital,opsz,wght@0,17..18,400..700;1,17..18,400..700&display=swap');

:root {
  --primary-color: #0f70d7;
  --light-bg: #d4dfe8;
  --light-text: #12253A; /*text pro light mode*/
  --light-text-small: #464646;
  --light-sidebar-bg: var(--primary-color);
  --light-highlight: #72A8E0;
  --light-sidebar-text: #fff;
  --light-border: #e9f5ff;
  --light-card-bg: #e9f5ff;
  --dark-bg: #161621;
  --dark-highlight: #245598;
  --dark-text: #e9f5ff;
  --dark-text-small: #b0bdcc;
  --dark-sidebar-bg: #2A3756;
  --dark-border: #393958;
  --dark-card-bg: #272730;

  --warning-color: #FFCA3A;
  --error-color: #FF595E;
  --success-color: #8AC926;
  --info-color: #1982C4;

}

* {font-family: 'Poppins', sans-serif;}

body {
  font-family: 'Poppins', sans-serif;
  margin: 0;
}

body.light-mode {
  background-color: var(--light-bg);
  color: var(--light-text);
}

body.dark-mode {
  background-color: var(--dark-bg);
  color: var(--dark-text);
}

.sidebar {
  width: 260px;
  display: flex;
  flex-direction: column;
  padding: 20px;
  box-sizing: border-box;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  z-index: 1000;
}

body.light-mode .sidebar {
  background-color: var(--light-sidebar-bg);
  color: var(--light-sidebar-text);
}

body.dark-mode .sidebar {
  background-color: var(--dark-sidebar-bg);
  color: var(--dark-text);
}

.sidebar-header {
  display: flex;
  justify-content: center;
}

.logo-placeholder img {
  height: 60px;
  width: 60px;
  background-color: #fff;
  padding: 10px;
  border: 2px dashed rgba(255, 255, 255, .5);
  border-radius: 50%;
  margin-bottom: 30px;
}

.nav-links {
  list-style: none;
  padding: 0;
  margin: 0;
  flex-grow: 1;
  overflow-y: auto;
  transition-duration: 0.3s;
}

.nav-links li a {
  display: flex;
  align-items: center;
  padding: 15px 20px;
  margin-bottom: 10px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  transition-duration: 0.2s;
}

body.light-mode .nav-links li a {
  color: var(--light-sidebar-text);
}

body.light-mode .nav-links li a:hover,
body.light-mode .nav-links li a.active {
  background-color: var(--primary-color-dark);
}

body.dark-mode .nav-links li a {
  color: var(--dark-text);
}

body.dark-mode .nav-links li a:hover,
body.dark-mode .nav-links li a.active {
  background-color: var(--primary-color);
  color: #fff;
}

.icon-placeholder {
  width: 20px;
  margin-right: 15px;
  text-align: center;
}

.sidebar-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, .2);
}

body.dark-mode .sidebar-footer {
  border-top: 1px solid var(--dark-border);
}

.theme-switcher {
  display: flex;
  align-items: center;
  gap: 10px;
}

.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 26px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #aaa;
  transition: .4s;
  border-radius: 26px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 4px;
  bottom: 4px;
  background-color: #fff;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: #ccc;
}

input:checked + .slider:before {
  transform: translateX(24px);
}

.profile-placeholder {
  height: 40px;
  width: 40px;
  border-radius: 50%;
  border: 2px solid #fff;
  background-color: rgba(255, 255, 255, .3);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

body.dark-mode .profile-placeholder {
  border-color: var(--dark-text);
  background-color: rgba(224, 224, 224, .2);
}

.main-content {
  padding: 40px;
  box-sizing: border-box;
  margin-left: 260px;
}

.main-content h1 {
  margin-top: 0;
}
.btn-primary, .btn-secondary {text-decoration: none;}
/* STYLY PRO TLACITKA 67676767*/

.btn-primary { background-color: var(--primary-color); color: #fff; padding: 12px 30px; border: none; border-radius: 8px; cursor: pointer; font-size: 1rem; font-weight: 600; transition: background-color 0.3s; margin-top: 20px; width: 100%; }
.btn-primary:hover { background-color: color-mix(in srgb, var(--primary-color), black 20%); }

.btn-secondary { background-color: transparent; color: var(--primary-color); padding: 12px 30px; border: 1px solid var(--primary-color); border-radius: 8px; cursor: pointer; font-size: 1rem; font-weight: 600; transition: background-color 0.3s; margin-top: 20px; width: 100%; }
body.dark-mode .btn-secondary {color: var(--dark-text)}
.btn-secondary:hover { color: #fff; background-color: var(--primary-color); }

.btn-green { background-color: var(--success-color); color: #fff; padding: 12px 30px; border: none; border-radius: 8px; cursor: pointer; font-size: 1rem; font-weight: 600; transition: background-color 0.3s; margin-top: 20px; width: 100%; }
.btn-green:hover { background-color: color-mix(in srgb, var(--success-color), black 20%); }

.btn-yellow { background-color: var(--warning-color); color: #fff; padding: 12px 30px; border: none; border-radius: 8px; cursor: pointer; font-size: 1rem; font-weight: 600; transition: background-color 0.3s; margin-top: 20px; width: 100%; }
.btn-yellow:hover { background-color: color-mix(in srgb, var(--warning-color), black 20%); }

.btn-red { background-color: var(--error-color); color: #fff; padding: 12px 30px; border: none; border-radius: 8px; cursor: pointer; font-size: 1rem; font-weight: 600; transition: background-color 0.3s; margin-top: 20px; width: 100%; }
.btn-red:hover { background-color: color-mix(in srgb, var(--error-color), black 20%);  }

.btn-blue { background-color: var(--info-color); color: #fff; padding: 12px 30px; border: none; border-radius: 8px; cursor: pointer; font-size: 1rem; font-weight: 600; transition: background-color 0.3s; margin-top: 20px; width: 100%; }
.btn-blue:hover { background-color: color-mix(in srgb, var(--info-color), black 20%); }

/* --- BAREVNÉ PODBARVENÍ ODKAZŮ V SIDEBARU --- */
    
    /* Společné nastavení pro barevné hover stavy - vynutí bílý text */
    .nav-links li a:hover,
    .nav-links li a.active {
        color: #fff !important;
        /* Přidá jemný stín pro lepší čitelnost */
        
    }

    /* Aktuality - Modrá (stejná jako Primary) */
    .nav-links li a:hover,
    .nav-links li a.active {
        background-color: var(--light-highlight) !important;
    }

    body.dark-mode .nav-links li a:hover,
    body.dark-mode .nav-links li a.active {
        background-color: var(--primary-color) !important;
    }
    

    /* Oprava ikonek, aby byly vždy bílé na barevném pozadí */
    .nav-links li a:hover i,
    .nav-links li a.active i,
    .nav-links li a#my-profile-link:hover i {
        color: #fff !important;
    }

/* --- Styly pro Mobilní Hamburger Menu --- */
.hamburger-menu {
    display: none;
    position: fixed;
    top: 25px; /* POSUNUTO NÍŽE */
    left: 20px;
    z-index: 1002;
    width: 30px;
    height: 25px;
    cursor: pointer;
    flex-direction: column;
    justify-content: space-around;
}
.hamburger-menu span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--primary-color);
    border-radius: 3px;
    transition: all 0.3s ease-in-out;
}
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 999;
}

/* --- Stav při otevřeném menu --- */
html.sidebar-open, 
body.sidebar-open {
    overflow: hidden; /* Zámek skrolování stránky */
}
body.sidebar-open .sidebar-overlay {
    display: block;
}
body.sidebar-open .hamburger-menu span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
body.sidebar-open .hamburger-menu span:nth-child(2) {
    opacity: 0;
}
body.sidebar-open .hamburger-menu span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}
body.light-mode.sidebar-open .hamburger-menu span {
    background-color: var(--light-sidebar-text); /* Změní barvu křížku na bílou */
}
/* --- Responzivní chování pro mobilní zařízení --- */
@media (max-width: 768px) {
    .hamburger-menu {
        display: flex;
    }
    .sidebar {
        width: 260px; 
        height: 100dvh;
        transform: translateX(-100%);
        transition: transform 0.3s ease-in-out;
        overflow: hidden; /* Zámek skrolování celého sidebaru */
        padding-top: 15px;
        padding-bottom: 15px;
    }
    .sidebar .logo-placeholder img {
        height: 50px;
        width: 50px;
        margin-bottom: 15px;
    }
    .sidebar .nav-links li a {
        padding-top: 10px;
        padding-bottom: 10px;
        margin-bottom: 5px;
    }
    .sidebar .sidebar-footer {
        padding-top: 15px;
    }
    body.sidebar-open .sidebar {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
        padding: 20px;
        padding-top: 80px;
    }
}

/* --- SKELETON LOADING (WAVE EFFECT) --- */
    .skeleton-box {
        border-radius: 4px;
        /* Lineární přechod: základní barva -> světlejší pruh -> základní barva */
        background: linear-gradient(
            90deg, 
            rgba(160, 160, 160, 0.2) 25%, 
            rgba(160, 160, 160, 0.4) 50%, 
            rgba(160, 160, 160, 0.2) 75%
        );
        /* Pozadí roztáhneme na 4násobek šířky, abychom měli prostor pro pohyb */
        background-size: 400% 100%;
        animation: skeleton-wave 1.5s infinite ease-in-out;
    }

    body.dark-mode .skeleton-box {
        /* Stejný princip, jen s barvami pro tmavý režim */
        background: linear-gradient(
            90deg, 
            rgba(255, 255, 255, 0.05) 25%, 
            rgba(255, 255, 255, 0.12) 50%, 
            rgba(255, 255, 255, 0.05) 75%
        );
        background-size: 400% 100%;
    }

    /* Společná animace posunu pozadí zprava doleva (vlna tak vizuálně jede zleva doprava) */
    @keyframes skeleton-wave {
        0% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    .skeleton-text { height: 14px; margin-bottom: 10px; width: 100%; }
    .skeleton-text.short { width: 30%; }
    .skeleton-text.medium { width: 70%; }
    .skeleton-avatar { width: 45px; height: 45px; border-radius: 50%; flex-shrink: 0; }