/* ─── DARK MODE (default) ─── */
:root {
    --bg: #070708;
    --fg: #fafafa;
    --card-bg: #0e0e10;
    --border-col: rgba(136, 107, 171, 0.3);
    --muted-bg: #1d1d20;
    --muted-fg: rgba(136, 107, 171, 0.9);
    --label-color: rgba(136, 107, 171, 0.9);
    --dot-color: rgba(136, 107, 171, 0.2);
    --shadow-col: rgba(136, 107, 171, 0.3);
    --btn-bg: #fafafa;
    --btn-fg: #070708;
    --btn-border: #fafafa;
    --nav-bg: #070708;
    --footer-bg: #070708;
}

/* ─── LIGHT MODE ─── */
html.light {
    --bg: #f5f4f0;
    --fg: #0a0a0b;
    --card-bg: #ffffff;
    --border-col: rgba(136, 107, 171, 0.35);
    --muted-bg: #e8e7e2;
    --muted-fg: rgba(100, 70, 140, 0.85);
    --label-color: rgba(100, 70, 140, 0.85);
    --dot-color: rgba(136, 107, 171, 0.2);
    --shadow-col: rgba(136, 107, 171, 0.35);
    --btn-bg: #0a0a0b;
    --btn-fg: #f5f4f0;
    --btn-border: #0a0a0b;
    --nav-bg: #f5f4f0;
    --footer-bg: #f5f4f0;
}

/* ─── BASE TRANSITIONS ─── */
*, *::before, *::after {
    transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

body {
    background-color: var(--bg);
    color: var(--fg);
    font-family: 'Space Grotesk', sans-serif;
    background-image: radial-gradient(var(--dot-color) 1px, transparent 1px);
    background-size: 20px 20px;
    min-height: 100vh;
}

.gum-border {
    border: 2px solid var(--border-col);
}

.gum-card {
    background-color: var(--card-bg);
    border: 2px solid var(--border-col);
    border-radius: 3px;
    box-shadow: 4px 4px 0px var(--shadow-col);
}

.gum-btn {
    background-color: var(--btn-bg);
    color: var(--btn-fg);
    border: 2px solid var(--btn-border);
    border-radius: 3px;
    box-shadow: 4px 4px 0px var(--shadow-col);
    transition: box-shadow 0.15s ease, transform 0.15s ease, background-color 0.25s ease;
}

.gum-btn:hover {
    box-shadow: 2px 2px 0px var(--shadow-col);
    transform: translate(2px, 2px);
}

.gum-btn:active {
    box-shadow: 0px 0px 0px var(--shadow-col);
    transform: translate(4px, 4px);
}

.halftone-bg {
    background-image:
        radial-gradient(var(--dot-color) 15%, transparent 16%),
        radial-gradient(var(--dot-color) 15%, transparent 16%);
    background-size: 8px 8px;
    background-position: 0 0, 4px 4px;
}

/* ─── NAV ─── */
.site-nav {
    background-color: var(--nav-bg);
    border-bottom: 2px solid var(--border-col);
}

/* ─── SECONDARY BUTTON ─── */
.gum-btn-ghost {
    background-color: var(--card-bg);
    color: var(--fg);
    border: 2px solid var(--border-col);
    border-radius: 3px;
}

.gum-btn-ghost:hover {
    background-color: var(--muted-bg);
}

/* ─── FOOTER ─── */
.site-footer {
    background-color: var(--footer-bg);
    border-top: 2px solid var(--border-col);
}

/* ─── HERO INVERT SPAN ─── */
.hero-invert {
    color: var(--bg);
    background-color: var(--fg);
}

/* ─── MUTED TEXT ─── */
.text-muted-custom {
    color: var(--muted-fg);
}

/* ─── BADGE ─── */
.badge {
    background-color: var(--card-bg);
    border: 2px solid var(--border-col);
    color: var(--fg);
}

/* ─── CARD ICON BOX ─── */
.icon-box {
    background-color: var(--muted-bg);
    border: 2px solid var(--border-col);
}

/* ─── THEME TOGGLE ─── */
.theme-toggle {
    position: relative;
    width: 52px;
    height: 28px;
    background-color: var(--muted-bg);
    border: 2px solid var(--border-col);
    border-radius: 3px;
    cursor: pointer;
    box-shadow: 3px 3px 0px var(--shadow-col);
    flex-shrink: 0;
    transition: background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.15s ease;
}

.theme-toggle:hover {
    box-shadow: 1px 1px 0px var(--shadow-col);
    transform: translate(2px, 2px);
}

.theme-toggle:active {
    box-shadow: 0px 0px 0px var(--shadow-col);
    transform: translate(3px, 3px);
}

.toggle-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background-color: var(--fg);
    border-radius: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), background-color 0.25s ease;
}

html.light .toggle-thumb {
    transform: translateX(24px);
}

/* icon swap */
.icon-moon { display: block; }
.icon-sun  { display: none; }
html.light .icon-moon { display: none; }
html.light .icon-sun  { display: block; }


/* ─── SCROLL OFFSET FOR FIXED NAVBAR ─── */
section[id], main[id] {
    scroll-margin-top: 72px;
}


/* ─── PURPLE VIBE LABELS & DESCRIPTIONS ─── */
.section-label {
    color: var(--label-color);
}

/* ─── PURPLE SCROLLBAR ─── */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg);
}
::-webkit-scrollbar-thumb {
    background: rgba(136, 107, 171, 0.5);
    border-radius: 0px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(136, 107, 171, 0.9);
}
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(136, 107, 171, 0.5) transparent;
}

/* ─── MOBILE MENU ANIMATIONS ─── */
@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to   { transform: translateX(0);    opacity: 1; }
}
@keyframes slideOut {
    from { transform: translateX(0);    opacity: 1; }
    to   { transform: translateX(100%); opacity: 0; }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}
@keyframes fadeOut {
    from { opacity: 1; }
    to   { opacity: 0; }
}

#mobileMenu .menu-panel {
    animation: slideIn 0.25s cubic-bezier(0.32, 0.72, 0, 1) forwards;
}
#mobileMenu .menu-backdrop {
    animation: fadeIn 0.25s ease forwards;
}
#mobileMenu.closing .menu-panel {
    animation: slideOut 0.2s cubic-bezier(0.32, 0.72, 0, 1) forwards;
}
#mobileMenu.closing .menu-backdrop {
    animation: fadeOut 0.2s ease forwards;
}