* {
    box-sizing: border-box;
    font-family: "PT Serif";
}

body {
    --background-color: #1a202e;    /* Deep navy night */
    --primary-color: #3a4f6f;       /* Rich medium blue */
    --secondary-color: #2d3f5c;     /* Deeper blue */
    --accent-color: #5b89b3;        /* Glowing blue highlight */
    --text-color: #ffffff;          /* Pure white */
    --heading-color: #c5d5e6;       /* Soft sky blue */

    --form-background: #222837;     /* Slightly lighter background */
    --text-on-primary: #ffffff;     /* White text */
    --button-text: #ffffff;         /* White text */

    --neutral-light: #d8e1ea;      /* Bright blue-white */
    --neutral-medium: #8494a7;     /* Muted blue-gray */
    --neutral-dark: #2d364a;       /* Deep blue shadow */

    font-size: 24px;
    color: var(--text-color);
    background-color: var(--background-color);
    width: 100vw;
    height: 100vh;

}

/* Generic Structural Layout Defaults */
div, section, article, header, footer, main, nav, aside {
    display: block;
}

span, em, strong, a {
    display: inline;
}

/* Typographic Defaults */
p {
    display: block;
    margin: 1em 0px;
}

h1, h2, h3, h4, h5, h6 {
    display: block;
    font-weight: bold;
    margin: 0.83em 0px;
    color: var(--heading-color);
}

h1 { font-size: 2em; }
h2 { font-size: 1.5em; }
h3 { font-size: 1.17em; }
h4 { font-size: 1em; }
h5 { font-size: 0.83em; }
h6 { font-size: 0.67em; }

em {
    font-style: italic;
}

strong {
    font-weight: bold;
}

a {
    color: #0000ee;
    text-decoration: underline;
}

a:hover {
    color: #551a8b;
}

blockquote {
    display: block;
    margin: 1em 40px;
    padding-left: 10px;
    border-left: 2px #cccccc;
    color: #555555;
}

code, pre {
    font-family: "rmlui-debugger-font";
    background-color: #606060;
    color: #000000;
    padding: 3px;
    font-style: italic;
}

pre {
    display: block;
    white-space: pre;
    margin: 1em 0px;
    padding: 8px;
}

/* Lists */
ul, ol {
    display: block;
    margin: 1em 0px;
    padding-left: 40px;
}

li {
    display: block;
}

/* ==========================================================================
   Tables
   ========================================================================== */
table {
    display: table;
}

tr {
    display: table-row;
}

td, th {
    display: table-cell;
    padding: 4px 8px;
    text-align: left;
}

th {
    font-weight: bold;
    background-color: #eaeaea;
}

col {
    display: table-column;
}

colgroup {
    display: table-column-group;
}

thead, tbody, tfoot {
    display: table-row-group;
}

/* ==========================================================================
   Form Inputs & Interactive UI Components
   ========================================================================== */
button, input, select, textarea {
    display: inline-block;
    /* font-family: "rmlui-debugger-font"; */
    font-size: 14px;
    margin: 2px;
    vertical-align: middle;
}

/* Traditional gray bevel button style */
button, input[type="submit"], input[type="button"] {
    padding: 4px 12px;
    min-width: 40px;
    background-color: #e1e1e1;
    color: #000000;
    border: 1px #767676;
    text-align: center;
}

button:hover, input[type="submit"]:hover, input[type="button"]:hover {
    background-color: #d0d0d0;
    border: 1px #4f4f4f;
}

button:active, input[type="submit"]:active, input[type="button"]:active {
    background-color: #b5b5b5;
    border: 1px #000000;
}

/* Standard text field styling */
input[type="text"], input[type="password"], textarea {
    padding: 4px;
    background-color: #ffffff;
    color: #000000;
    border: 1px #767676;
}

input[type="text"]:focus, input[type="password"]:focus, textarea:focus {
    border: 1px #005aff;
}

textarea {
    display: block;
    white-space: pre-wrap;
    width: 300px;
    height: 100px;
}

/* Select Box & Dropdowns */
select {
    padding: 4px;
    background-color: #ffffff;
    color: #000000;
    border: 1px #767676;
    text-align: left;
}

/* ==========================================================================
   RmlUi Specific Elements (Tabsets, Progress Bars, etc.)
   ========================================================================== */
tabset {
    display: block;
}

tabset tabs {
    display: block;
    border-bottom: 1px #cccccc;
}

/* Simple default layout style for built-in tabs */
tab {
    display: inline-block;
    padding: 6px 12px;
    background-color: #f0f0f0;
    border: 1px #cccccc;
    margin-right: 2px;
}

tab:selected {
    background-color: #ffffff;
    border-bottom: 1px #ffffff; /* Overlap the bottom border line */
    font-weight: bold;
}

panel {
    display: block;
    padding: 10px;
    background-color: #ffffff;
}

/* Standard HTML5 / RmlUi Progress Bar Fallback */
progress {
    display: inline-block;
    width: 160px;
    height: 20px;
    background-color: #e6e6e6;
    border: 1px #b0b0b0;
}

progress-value {
    display: block;
    height: 100%;
    background-color: #0078d7; /* Classic Windows Blue fill */
}

/* ==========================================================================
   Utility & Modern Layout Helpers
   ========================================================================== */
.flex {
    display: flex;
}

.flex-row {
    flex-direction: row;
}

.flex-col {
    flex-direction: column;
}

.justify-center {
    justify-content: center;
}

.align-center {
    align-items: center;
}

.hidden {
    display: none;
}


/* ==========================================================================
   Shell
   ========================================================================== */


#navbar {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    
    width: 100%;
    height: 70px;
    padding: 0px 20px;
    background-color: transparent;
    box-shadow: #000a 0px 6px 8px;
}

#navbar h1 {
    color: var(--heading-color);
    font-size: 24px;
    margin: 0px;
}

#navbar .nav-buttons {
    display: flex;
    flex-direction: row;
    gap: 12px;
}

#navbar button {
    padding: 8px 16px;
}

#navbar svg.logo {
    width: 50px;
    height: 50px;
}


#page-content {
    display: block;
    padding: 2rem;
    background-color: var(--background-color);
    color: var(--text-color);
    margin-top: 15px;
}

/* Custom controls */
button.btn-primary {
    transition: background-color 0.2s exponential-in-out;
    display: inline-block;
    min-width: 100px;
    min-height: 35px;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    background-color: var(--primary-color);
    border-radius: 4px;
    border-color: transparent;
    
    color: var(--text-color);
    font-size: 16px;
} button.btn-primary:hover {
    background-color: var(--secondary-color);
    cursor: pointer;
} 
/* button.btn-primary:active {
    background-color: #3e8e41;
    border-color: #245325;
} */