/* --- Variables & Theme Setup --- */
:root {
    /* Dark Theme (Default) */
    --bg-app: #05060a;
    --bg-panel: rgba(10, 12, 18, 0.8);
    --bg-card: #0e111a;
    --bg-card-hover: #161b26;
    --border-color: #1f2933;
    --accent-color: #4f46e5;
    --accent-hover: #4338ca;
    --text-main: #e5e7eb;
    --text-muted: #9ca3af;
    --placeholder-bg: #111827;

    /* Dynamic Background Color (Deep Indigo/Purple for Dark Mode) */
    --glow-color: rgba(79, 70, 229, 0.15);

    --font-main: "JetBrains Mono", "Fira Code", monospace;
    --transition: 0.25s ease;
}

body.light-theme {
    /* Light Theme overrides */
    --bg-app: #f3f4f6;
    --bg-panel: rgba(
        255,
        255,
        255,
        0.85
    ); /* Slightly more transparent for glow visibility */
    --bg-card: #ffffff;
    --bg-card-hover: #f9fafb;
    --border-color: #e5e7eb;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --placeholder-bg: #e5e7eb;

    /* Dynamic Background Color (Soft Blue/Violet for Light Mode) */
    --glow-color: rgba(165, 180, 252, 0.4);
}

/* --- Base Reset & Layout --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body.hub-page {
    font-family: var(--font-main);
    background: var(--bg-app);
    color: var(--text-main);
    transition:
        background var(--transition),
        color var(--transition);
    position: relative;
    overflow-x: hidden; /* Prevent scrollbar from blur overflow */
}

/* --- Dynamic Background Glow --- */
.bg-glow {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60vmax; /* Responsive size */
    height: 60vmax;
    background: radial-gradient(
        circle at center,
        var(--glow-color) 0%,
        transparent 70%
    );
    z-index: -1; /* Behind everything */
    pointer-events: none; /* Click-through */
    filter: blur(60px); /* Soften the edges significantly */
    animation: pulse-glow 8s ease-in-out infinite alternate;
}

@keyframes pulse-glow {
    0% {
        opacity: 0.5;
        transform: translate(-50%, -50%) scale(0.8);
    }
    100% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

.site-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1; /* Keep content above glow */
}

/* --- Header --- */
.header {
    padding: 24px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 32px;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.title {
    font-size: 20px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.subtitle {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Theme Toggle Button */
.theme-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-panel); /* Add background to stand out from glow */
}

.theme-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.light-theme .theme-icon.sun {
    display: none;
}
.light-theme .theme-icon.moon {
    display: inline;
}
body:not(.light-theme) .theme-icon.sun {
    display: inline;
}
body:not(.light-theme) .theme-icon.moon {
    display: none;
}

/* --- Main Grid Layout --- */
.hub-main {
    flex: 1; /* Pushes footer down */
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 32px;
    padding-bottom: 40px;
}

/* --- Left Column: List --- */
.hub-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.hub-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    cursor: pointer;
    transition: var(--transition);
}

.hub-item:hover,
.hub-item.active {
    border-color: var(--accent-color);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.hub-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.hub-item-title {
    display: block;
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 4px;
}

.hub-item-meta {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hub-item-arrow {
    font-size: 14px;
    color: var(--text-muted);
    opacity: 0.5;
}

/* Mobile Content Hidden by default on Desktop */
.hub-item-mobile-content {
    display: none;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

/* --- Right Column: Preview Panel (Desktop) --- */
.hub-preview-panel {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    height: fit-content;
    position: sticky;
    top: 20px;
    backdrop-filter: blur(10px);
}

.panel-label {
    font-size: 11px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 8px;
    letter-spacing: 0.08em;
}

.panel-text {
    font-size: 13px;
    line-height: 1.5;
    color: var(--text-muted);
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

.preview-placeholder {
    text-align: center;
    color: var(--text-muted);
    padding: 40px 0;
    font-size: 13px;
    font-style: italic;
}

.project-details {
    display: none; /* Hidden until activated */
    animation: fadeIn 0.3s ease;
}

.project-details.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.desktop-img-placeholder {
    width: 100%;
    height: 200px;
    background: var(--placeholder-bg);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 12px;
    margin-bottom: 20px;
    border: 1px dashed var(--border-color);
}

.detail-title {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--text-main);
}

.detail-desc {
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.detail-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.detail-tags span {
    font-size: 10px;
    background: var(--border-color);
    padding: 4px 8px;
    border-radius: 4px;
    color: var(--text-main);
}

/* Buttons */
.play-btn,
.play-btn-lg {
    background: var(--accent-color);
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    font-size: 13px;
    transition: background 0.2s;
    text-align: center;
    width: 100%;
    display: block;
}

.play-btn:hover,
.play-btn-lg:hover {
    background: var(--accent-hover);
}

/* --- Footer --- */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 20px 0;
    text-align: center;
    font-size: 11px;
    color: var(--text-muted);
    margin-top: auto; /* Sticky footer magic */
}

/* --- Actual Images Styles (Global) --- */
.mobile-img-actual,
.desktop-img-actual {
    width: 100%;
    display: block;
    border-radius: 6px;
    object-fit: cover;
    border: 1px solid var(--border-color);
    margin-bottom: 16px;
    background-color: var(--placeholder-bg);
}

.mobile-img-actual {
    height: 140px;
}

.desktop-img-actual {
    height: 300px;
}

/* --- Mobile / Tablet Adaptation --- */
@media (max-width: 768px) {
    .hub-main {
        grid-template-columns: 1fr; /* Single column */
        gap: 20px;
    }

    /* Hide the right panel completely on mobile */
    .hub-preview-panel {
        display: none;
    }

    /* Show content inside the cards */
    .hub-item-mobile-content {
        display: block;
    }

    /* Image placeholder for mobile */
    .mobile-img-placeholder {
        width: 100%;
        height: 140px;
        background: var(--placeholder-bg);
        border-radius: 6px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-muted);
        font-size: 11px;
        margin-bottom: 12px;
        border: 1px dashed var(--border-color);
    }

    .mobile-desc {
        font-size: 12px;
        color: var(--text-muted);
        line-height: 1.5;
        margin-bottom: 16px;
    }

    /* Disable hover effects that stick on mobile */
    .hub-item:hover {
        transform: none;
    }
}