@font-face {
    font-family: 'Open Sans';
    font-style: normal;
    font-weight: 400;
    src: local('Open Sans'), local('OpenSans'), url(/assets/fonts/OpenSans.woff) format('woff');
}

/* Light/dark theme tokens */
:root {
    --bg-body: #f5f5f5;
    --bg-header: #ffffff;
    --bg-footer: #f8f8f8;
    --bg-surface: #ffffff;
    --border-subtle: #dddddd;
    --shadow-soft: 0 2px 4px rgba(0,0,0,0.1);

    --text-main: #333333;
    --text-muted: #666666;

    --link: #337ab7;
    --link-hover: #23527c;

    --nav-link: #333333;
    --nav-link-hover-bg: #f5f5f5;

    --dropdown-bg: #ffffff;
    --dropdown-border: #dddddd;
}

body.theme-dark {
    --bg-body: #111214;
    --bg-header: #181a1f;
    --bg-footer: #181a1f;
    --bg-surface: #20232b;
    --border-subtle: #333842;
    --shadow-soft: 0 2px 4px rgba(0,0,0,0.6);

    --text-main: #e6e6e6;
    --text-muted: #a0a4b0;

    --link: #7ab0ff;
    --link-hover: #a4c7ff;

    --nav-link: #e6e6e6;
    --nav-link-hover-bg: #2a2f3a;

    --dropdown-bg: #20232b;
    --dropdown-border: #333842;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Open Sans', Verdana, Geneva, sans-serif;
    font-size: 14px;
    color: var(--text-main);
    background-color: var(--bg-body);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

a {
    color: var(--link);
    text-decoration: none;
}

a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

a img {
    border: none;
}

#body-wrapper {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background-color: var(--bg-header);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-soft);
}

.navbar {
    margin-bottom: 0;
    border-radius: 0;
    padding: 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    padding: 0 15px;
}

.navbar-brand {
    font-weight: bold;
    font-size: 18px;
    padding: 15px;
    color: var(--nav-link);
}

.navbar-brand:hover {
    text-decoration: none;
    color: var(--link-hover);
}

#content-wrapper {
    flex: 1;
    margin: 0;
    padding: 0;
    min-height: 500px;
    width: 100%;
}

#content-wrapper.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 15px;
}

footer {
    font-size: 12px;
    padding: 20px 10px;
    text-align: center;
    margin-top: auto;
    background-color: var(--bg-footer);
    border-top: 1px solid var(--border-subtle);
    color: var(--text-muted);
}

footer a {
    color: var(--text-muted);
    margin: 0 5px;
}

footer a:hover {
    color: var(--text-main);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.navbar {
    min-height: 50px;
}

.navbar-nav {
    margin: 0;
    padding: 0;
    display: flex;
    list-style: none;
}

.navbar-nav > li {
    position: relative;
}

.navbar-nav > li > a {
    padding: 15px;
    display: block;
    color: var(--nav-link);
}

.navbar-nav > li > a:hover {
    background-color: var(--nav-link-hover-bg);
    text-decoration: none;
}

.dropdown {
    position: relative;
}

.dropdown-toggle .caret {
    font-size: 0.7em;
    margin-left: 3px;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--dropdown-bg);
    border: 1px solid var(--dropdown-border);
    border-radius: 4px;
    box-shadow: var(--shadow-soft);
    padding: 5px 0;
    min-width: 160px;
    z-index: 1000;
    list-style: none;
    margin: 0;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu li a {
    display: block;
    padding: 8px 20px;
    color: var(--nav-link);
}

.dropdown-menu li a:hover {
    background-color: var(--nav-link-hover-bg);
    text-decoration: none;
}

.navbar-right {
    margin-left: auto;
}

/* Dark mode toggle */
.theme-toggle-btn {
    border: 1px solid var(--border-subtle);
    border-radius: 999px;
    padding: 8px 12px;
    margin: 8px 10px 8px 0;
    background: transparent;
    color: var(--nav-link);
    font-size: 13px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    line-height: 1;
}

.theme-toggle-btn span {
    margin-left: 4px;
}

.theme-toggle-btn:hover {
    background-color: var(--nav-link-hover-bg);
}

@media (max-width: 768px) {
    .navbar .container {
        flex-wrap: wrap;
    }
    
    .navbar-nav {
        width: 100%;
        flex-direction: column;
    }
    
    .navbar-nav > li {
        width: 100%;
    }
    
    .navbar-right {
        margin-left: 0;
    }
    
    .dropdown-menu {
        position: static;
        display: block;
        box-shadow: none;
        border: none;
    }
}