/*
Reset
*/

*,
*::before,
*::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

html {
    -webkit-text-size-adjust: 100%;
}

img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
}

input,
button,
textarea,
select {
    font: inherit;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
    overflow-wrap: break-word;
}

/*
 Color scheme
 */

:root {
    --color-bg: #454545;
    --color-container-bg: #121212;
    --color-text: #e0e0e0;
    --color-text-muted: #666;
    --color-link: #66b3ff;
    --color-link-hover: #99ccff;
    --color-border: #333333;
    --color-surface: #1e1e1e;
    --color-accent: #a33;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.5);

    /* Messages */
    --color-success: #393;
    --color-info: #339;
    --color-warning: #f90;
    --color-error: #a00;
    --color-debug: #666;

    /* Buttons */
    --color-btn-bg: #a33;
    --color-btn-text: #fff;

    /* Typeface */
    --font-heading: Avenir, Montserrat, Corbel, 'URW Gothic', source-sans-pro, sans-serif;
}

/* Light theme (system preference) */
@media (prefers-color-scheme: light) {
    :root {
        --color-bg: #ccc;
        --color-container-bg: #fff;
        --color-text: #1a1a1a;
        --color-text-muted: #999;
        --color-link: #0066cc;
        --color-link-hover: #0044aa;
        --color-border: #e0e0e0;
        --color-surface: #f5f5f5;
        --color-accent: #a00;
        --shadow: 0 4px 24px rgba(0, 0, 0, 0.15);

        /* Messages */
        --color-success: #2e7d32;
        --color-info: #1565c0;
        --color-warning: #ef6c00;
        --color-error: #c62828;
        --color-debug: #616161;

        /* Buttons */
        --color-btn-bg: #a00;
        --color-btn-text: #fff;
    }
}

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

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

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

ul,
ol {
    list-style: none;
}

table {
    border-collapse: collapse;
}

/*
Text scheme
*/

html {
    font-size: 100%;
}

body {
    -webkit-font-smoothing: antialiased;
    font-family: system-ui, sans-serif;
    font-weight: normal;
    font-size: 1rem;
    user-select: none;
    -webkit-font-smoothing: antialiased;
}

/*
Buttons
*/

[role="button"],
button,
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--color-btn-bg);
    color: var(--color-btn-text);
    border: none;
    border-radius: 2px;
    cursor: pointer;
    text-decoration: none;
    font-family: var(--font-heading);
}

[role="button"]:hover,
button:hover,
.btn:hover {
    color: var(--color-btn-text);
    text-decoration: underline;
}

[role="button"]:disabled,
button:disabled,
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/*
Container
*/

#container {
    max-width: 65ch;
    margin: 2rem auto;
    min-height: calc(65vh);
    padding: 0;
    background-color: var(--color-container-bg);
    border-radius: 2px;
    box-shadow: var(--shadow);
}

/*
Header Nav
*/

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
}

header nav {
    display: flex;
}

header nav ul {
    display: flex;
    gap: 1rem;
}

/*
Header Logo
*/

header #logo a {
    font-size: 2rem;
    font-family: var(--font-heading);
    font-weight: bolder;
}

#logo #one {
    color: var(--color-text);
}

#logo #two {
    color: var(--color-accent);
}

#logo #three {
    color: var(--color-text-muted);
    font-size: smaller;
}

/*
Messages
*/

.messages {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
}

.messages li {
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    text-align: center;
}

.messages .success {
    background-color: var(--color-success);
    color: #fff;
}

.messages .info {
    background-color: var(--color-info);
    color: #fff;
}

.messages .warning {
    background-color: var(--color-warning);
    color: #fff;
}

.messages .error {
    background-color: var(--color-error);
    color: #fff;
}

.messages .debug {
    background-color: var(--color-debug);
    color: #fff;
}


/*
Main Nav
*/