/* =========================================
   1. GLOBAL & BASE STYLES
   ========================================= */
:root {
    /* --- Explicit Color Tokens --- */
    --bg-main-light: white;
    --bg-header-footer-light: #f8f9fa;
    --text-main-light: #333333;
    --text-header-footer-light: #333333;
    --accent-light: #6a1b9a;
    --share-bg-light: #333333;
    --btn-shadow-light: 0 3px 6px #00000026, 0 1px 3px #0000001a;
    --btn-border-light: transparent;

    --bg-main-dark: #121212;
    --bg-header-footer-dark: #1e1e1e;
    --text-main-dark: #e0e0e0;
    --text-header-footer-dark: white;
    --accent-dark: #ba68c8;
    --share-bg-dark: #333333;
    --btn-shadow-dark: none;
    --btn-border-dark: var(--accent-dark);

    /* --- Default Active Theme (Light) --- */
    --bg-main: var(--bg-main-light);
    --bg-header-footer: var(--bg-header-footer-light);
    --text-main: var(--text-main-light);
    --text-header-footer: var(--text-header-footer-light);
    --accent-color: var(--accent-light);
    --share-bg: var(--share-bg-light);
    --btn-shadow: var(--btn-shadow-light);
    --btn-border: var(--btn-border-light);
}

html.theme-light {
    --bg-main: var(--bg-main-light);
    --bg-header-footer: var(--bg-header-footer-light);
    --text-main: var(--text-main-light);
    --text-header-footer: var(--text-header-footer-light);
    --accent-color: var(--accent-light);
    --share-bg: var(--share-bg-light);
    --btn-shadow: var(--btn-shadow-light);
    --btn-border: var(--btn-border-light);
}

html.theme-dark {
    --bg-main: var(--bg-main-dark);
    --bg-header-footer: var(--bg-header-footer-dark);
    --text-main: var(--text-main-dark);
    --text-header-footer: var(--text-header-footer-dark);
    --accent-color: var(--accent-dark);
    --share-bg: var(--share-bg-dark);
    --btn-shadow: var(--btn-shadow-dark);
    --btn-border: var(--btn-border-dark);
}

@media (prefers-color-scheme: dark) {
    :root:not(.theme-light) {
        --bg-main: var(--bg-main-dark);
        --bg-header-footer: var(--bg-header-footer-dark);
        --text-main: var(--text-main-dark);
        --text-header-footer: var(--text-header-footer-dark);
        --accent-color: var(--accent-dark);
        --share-bg: var(--share-bg-dark);
        --btn-shadow: var(--btn-shadow-dark);
        --btn-border: var(--btn-border-dark);
    }
}

html {
    box-sizing: border-box;
}

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

html,
body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Comfortaa', cursive;
    background-color: var(--bg-main);
    color: var(--text-main);
    display: grid;
    min-height: 100vh;
    grid-template-rows: auto 1fr auto;
}

/* =========================================
   2. LAYOUT & STRUCTURE
   ========================================= */
header,
footer,
section {
    text-align: center;
}

header,
footer {
    color: var(--text-header-footer);
    background-color: var(--bg-header-footer);
}

header {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1em;
    padding: 1.5em 1em;
    z-index: 1;
    border-bottom: 4px solid var(--accent-color);
    box-shadow: 0 1px 3px #0000001f, 0 1px 2px #0000003d;
}

@media (min-width: 600px) {
    header {
        flex-direction: row;
        justify-content: space-between;
        padding: 0 2em;
        min-height: 6em;
    }
}

.header-branding {
    display: flex;
    align-items: center;
    gap: 0.75em;
}

.header-logo {
    width: 40px;
    height: 40px;
}

header h1 {
    margin: 0;
    font-size: 1.5rem;
}

section {
    display: flex;
    flex-direction: column;
}

.content {
    margin: auto;
    padding: 2em;
}

.content img {
    max-width: 100%;
    height: auto;
    margin-top: 1em;
}

nav {
    padding-bottom: 1em;
}

footer {
    display: flex;
    flex-direction: column;
    z-index: 1;
    padding: 1em 1em 0.5em 1em;
    border-top: 4px solid var(--accent-color);
    box-shadow: 0 -3px 6px #00000029, 0 -3px 6px #0000003b;
}

footer p {
    margin: auto;
    padding-top: 0.5em;
    padding-bottom: 0.5em;
}

/* =========================================
   3. SHARE BUTTONS
   ========================================= */
.share-button {
    display: inline-block;
    margin: 4px 6px;
    width: 32px;
    height: 32px;
    border-radius: 32px;
    padding: 0;
    color: white;
    background-color: var(--share-bg);
    outline: none;
    text-decoration: none;
    /* border, highlight, inner shadow, drop shadow */
    box-shadow: var(--btn-shadow), 0 0 0 2px var(--btn-border);
    transition: 0.4s;
}

.share-button:focus {
    background-image: none;
}

.share-button:hover {
    opacity: 0.75;
    transform: scale(1.125);
}

.share-button:active,
.share-button:active:focus {
    background-image: linear-gradient(to top, #ffffff4d, #0000001a);
}

.share-button i,
.share-button span {
    margin: 8px;
    vertical-align: middle;
    color: white;
}

.share-button:active span {
    color: white;
    text-shadow: 0 2px #00000033;
}

.share-button span {
    font-size: 24px;
    line-height: 26px;
    text-transform: uppercase;
    font-weight: 700;
    margin: 0;
    padding: 0;
}

.share-button i {
    font-size: 16px;
    vertical-align: middle;
    text-align: center;
    line-height: 33px;
    width: 24px;
    margin: 0;
    padding: 0;
}

@media (min-width: 992px) {
    .share-button {
        width: 64px;
        height: 64px;
    }

    .share-button span {
        line-height: 52px;
    }

    .share-button i {
        font-size: 32px;
        line-height: 66px;
        width: 64px;
    }
}


/* =========================================
   4. BRAND COLORS
   ========================================= */
.share-button.x {
    background-color: black;
}

.share-button.stack {
    background-color: #1E5397;
}

.share-button.deviantart {
    background-color: black;
}

.share-button.deviantart i {
    color: #50CC47;
}

.share-button.github {
    background-color: #26115F;
}

.share-button.linkedin {
    background-color: #0A66C2;
}

.share-button.dev {
    background-color: #0A0A0A;
}

.share-button.instagram {
    background-color: #E4405F;
}

.share-button.youtube {
    background-color: #FF0000;
}

.share-button.gitlab {
    background-color: #FC6D26;
}

.share-button.medium {
    background-color: #E8E8E8;
}

.share-button.medium i {
    color: #191919;
}

.share-button.steam {
    background-color: #1B2838;
}

/* =========================================
   5. ANIMATIONS
   ========================================= */
/*
    Hearbeat Animation
    Derived from https://codepen.io/ksycz/pen/MVvqpy
*/

.heartbeat-animation {
    animation: 1.25s infinite heartbeat;
}

@keyframes heartbeat {
    0% {
        transform: scale(1);
    }

    25% {
        transform: scale(1.05);
    }

    40% {
        transform: scale(1);
    }

    60% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
    }
}

/* end - Hearbeat Animation */

/* =========================================
   6. THEME SEGMENT CONTROL
   ========================================= */
.theme-segment {
    display: flex;
    background-color: var(--share-bg);
    border-radius: 20px;
    padding: 3px;
    gap: 2px;
    box-shadow: var(--btn-shadow), 0 0 0 2px var(--btn-border);
}

.theme-segment button {
    background: transparent;
    border: none;
    color: white;
    font-size: 1.1rem;
    cursor: pointer;
    border-radius: 16px;
    padding: 0.4em 0.8em;
    outline: none;
    transition: all 0.3s ease;
}

.theme-segment button:hover {
    opacity: 0.8;
}

.theme-segment button.active {
    background-color: var(--accent-color);
    color: white;
}