/* ==========================================================================
   Hub / Index Page — Light Corporate Theme
   ========================================================================== */

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

/* ---------- Design Tokens (Light — default) ---------- */
:root {
    --hub-bg:            #f8fafc;
    --hub-card-bg:       #ffffff;
    --hub-card-border:   #e2e8f0;
    --hub-text:          #1e293b;
    --hub-text-muted:    #64748b;
    --hub-accent:        #3b82f6;
    --hub-shadow:        0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --hub-shadow-hover:  0 10px 24px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.04);
    --hub-radius:        10px;
    --hub-font:          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                         "Helvetica Neue", Arial, sans-serif;
    --hub-max-width:     1200px;
    --hub-accent-width:  5px;
    --hub-footer-bg:     #ffffff;
    --hub-footer-border: #e2e8f0;
    --hub-badge-bg:      #f1f5f9;
    --hub-badge-text:    #475569;
    --hub-tag-bg:        #f1f5f9;
    --hub-tag-text:      #475569;
    --hub-tag-border:    #e2e8f0;
    --hub-hero-bg:       #ffffff;
    --hub-hero-border:   #e2e8f0;
}

/* ---------- Design Tokens (Dark) ---------- */
[data-theme="dark"] {
    --hub-bg:            #0f172a;
    --hub-card-bg:       #1e293b;
    --hub-card-border:   #334155;
    --hub-text:          #e2e8f0;
    --hub-text-muted:    #94a3b8;
    --hub-accent:        #3b82f6;
    --hub-shadow:        0 1px 3px rgba(0, 0, 0, 0.25), 0 1px 2px rgba(0, 0, 0, 0.18);
    --hub-shadow-hover:  0 10px 24px rgba(0, 0, 0, 0.35), 0 4px 8px rgba(0, 0, 0, 0.22);
    --hub-footer-bg:     #1e293b;
    --hub-footer-border: #334155;
    --hub-badge-bg:      #334155;
    --hub-badge-text:    #cbd5e1;
    --hub-tag-bg:        #334155;
    --hub-tag-text:      #cbd5e1;
    --hub-tag-border:    #475569;
    --hub-hero-bg:       #1e293b;
    --hub-hero-border:   #334155;
}

body {
    font-family: var(--hub-font);
    background-color: var(--hub-bg);
    color: var(--hub-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hub-hero {
    background-color: var(--hub-hero-bg);
    border-bottom: 1px solid var(--hub-hero-border);
    padding: 48px 24px 44px;
    text-align: center;
}

.hub-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--hub-text);
    letter-spacing: -0.025em;
    margin-bottom: 8px;
}

.hub-subtitle {
    font-size: 1.075rem;
    color: var(--hub-text-muted);
    font-weight: 400;
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================================================
   Main Content Area
   ========================================================================== */
.hub-main {
    max-width: var(--hub-max-width);
    width: 100%;
    margin: 0 auto;
    padding: 40px 24px 60px;
    flex: 1;
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.hub-section-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.hub-section-header:not(:first-child) {
    margin-top: 40px;
}

.hub-section-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--hub-text);
    letter-spacing: -0.01em;
}

.hub-section-line {
    flex: 1;
    height: 1px;
    background: var(--hub-card-border);
}

/* ==========================================================================
   Card Grid
   ========================================================================== */
.hub-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

@media (max-width: 1024px) {
    .hub-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .hub-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Card Component
   ========================================================================== */
.hub-card {
    position: relative;
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    background-color: var(--hub-card-bg);
    border: 1px solid var(--hub-card-border);
    border-radius: var(--hub-radius);
    box-shadow: var(--hub-shadow);
    padding: 24px 24px 24px calc(24px + var(--hub-accent-width));
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.hub-card:hover,
.hub-card:focus-visible {
    transform: translateY(-3px);
    box-shadow: var(--hub-shadow-hover);
    text-decoration: none;
    color: inherit;
}

.hub-card:focus-visible {
    outline: 2px solid var(--hub-accent);
    outline-offset: 2px;
}

/* Left accent bar */
.hub-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: var(--hub-accent-width);
    height: 100%;
    background-color: var(--hub-accent);
    border-radius: var(--hub-radius) 0 0 var(--hub-radius);
}

/* ---------- Accent colours via data-color ---------- */
.hub-card[data-color="blue"]::before    { background-color: #3b82f6; }
.hub-card[data-color="green"]::before   { background-color: #22c55e; }
.hub-card[data-color="amber"]::before   { background-color: #f59e0b; }
.hub-card[data-color="red"]::before     { background-color: #ef4444; }
.hub-card[data-color="purple"]::before  { background-color: #8b5cf6; }
.hub-card[data-color="teal"]::before    { background-color: #14b8a6; }
.hub-card[data-color="indigo"]::before  { background-color: #6366f1; }
.hub-card[data-color="pink"]::before    { background-color: #ec4899; }
.hub-card[data-color="slate"]::before   { background-color: #64748b; }
.hub-card[data-color="orange"]::before  { background-color: #f97316; }

/* ==========================================================================
   Card — Icon Area
   ========================================================================== */
.hub-card-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background-color: var(--hub-tag-bg);
    color: var(--hub-text-muted);
    font-size: 1.35rem;
    margin-right: 18px;
}

/* Tint icon container to match card accent colour */
.hub-card[data-color="blue"]   .hub-card-icon { background-color: #eff6ff; color: #3b82f6; }
.hub-card[data-color="green"]  .hub-card-icon { background-color: #f0fdf4; color: #22c55e; }
.hub-card[data-color="amber"]  .hub-card-icon { background-color: #fffbeb; color: #f59e0b; }
.hub-card[data-color="red"]    .hub-card-icon { background-color: #fef2f2; color: #ef4444; }
.hub-card[data-color="purple"] .hub-card-icon { background-color: #f5f3ff; color: #8b5cf6; }
.hub-card[data-color="teal"]   .hub-card-icon { background-color: #f0fdfa; color: #14b8a6; }
.hub-card[data-color="indigo"] .hub-card-icon { background-color: #eef2ff; color: #6366f1; }
.hub-card[data-color="pink"]   .hub-card-icon { background-color: #fdf2f8; color: #ec4899; }
.hub-card[data-color="slate"]  .hub-card-icon { background-color: #f8fafc; color: #64748b; }
.hub-card[data-color="orange"] .hub-card-icon { background-color: #fff7ed; color: #f97316; }

/* Dark-mode icon tints — subtler background so they don't blow out */
[data-theme="dark"] .hub-card[data-color="blue"]   .hub-card-icon { background-color: rgba(59,130,246,0.15); }
[data-theme="dark"] .hub-card[data-color="green"]  .hub-card-icon { background-color: rgba(34,197,94,0.15);  }
[data-theme="dark"] .hub-card[data-color="amber"]  .hub-card-icon { background-color: rgba(245,158,11,0.15); }
[data-theme="dark"] .hub-card[data-color="red"]    .hub-card-icon { background-color: rgba(239,68,68,0.15);  }
[data-theme="dark"] .hub-card[data-color="purple"] .hub-card-icon { background-color: rgba(139,92,246,0.15); }
[data-theme="dark"] .hub-card[data-color="teal"]   .hub-card-icon { background-color: rgba(20,184,166,0.15); }
[data-theme="dark"] .hub-card[data-color="indigo"] .hub-card-icon { background-color: rgba(99,102,241,0.15); }
[data-theme="dark"] .hub-card[data-color="pink"]   .hub-card-icon { background-color: rgba(236,72,153,0.15); }
[data-theme="dark"] .hub-card[data-color="slate"]  .hub-card-icon { background-color: rgba(100,116,139,0.15);}
[data-theme="dark"] .hub-card[data-color="orange"] .hub-card-icon { background-color: rgba(249,115,22,0.15); }

/* ==========================================================================
   Card — Body (Text Content)
   ========================================================================== */
.hub-card-body {
    flex: 1;
    min-width: 0; /* prevent overflow */
}

.hub-card-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--hub-text);
    margin-bottom: 4px;
    line-height: 1.35;
}

.hub-card-desc {
    font-size: 0.875rem;
    color: var(--hub-text-muted);
    line-height: 1.55;
    margin-bottom: 14px;
}

/* ==========================================================================
   Card — Meta Row (Badge + Tags)
   ========================================================================== */
.hub-card-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

/* ---------- Status Badge ---------- */
.hub-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-radius: 9999px;
    background-color: var(--hub-badge-bg);
    color: var(--hub-badge-text);
    line-height: 1.5;
    white-space: nowrap;
}

.hub-badge-green {
    background-color: #dcfce7;
    color: #166534;
}

.hub-badge-amber {
    background-color: #fef3c7;
    color: #92400e;
}

.hub-badge-red {
    background-color: #fee2e2;
    color: #991b1b;
}

.hub-badge-blue {
    background-color: #dbeafe;
    color: #1e40af;
}

.hub-badge-purple {
    background-color: #ede9fe;
    color: #5b21b6;
}

/* Dark mode badge overrides */
[data-theme="dark"] .hub-badge-green {
    background-color: rgba(34, 197, 94, 0.18);
    color: #86efac;
}

[data-theme="dark"] .hub-badge-amber {
    background-color: rgba(245, 158, 11, 0.18);
    color: #fcd34d;
}

[data-theme="dark"] .hub-badge-red {
    background-color: rgba(239, 68, 68, 0.18);
    color: #fca5a5;
}

[data-theme="dark"] .hub-badge-blue {
    background-color: rgba(59, 130, 246, 0.18);
    color: #93c5fd;
}

[data-theme="dark"] .hub-badge-purple {
    background-color: rgba(139, 92, 246, 0.18);
    color: #c4b5fd;
}

/* ---------- Hardware / Tech Tags ---------- */
.hub-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
}

.hub-tag {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: 0.68rem;
    font-weight: 500;
    border-radius: 5px;
    background-color: var(--hub-tag-bg);
    color: var(--hub-tag-text);
    border: 1px solid var(--hub-tag-border);
    white-space: nowrap;
    line-height: 1.55;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.hub-footer {
    background-color: var(--hub-footer-bg);
    border-top: 1px solid var(--hub-footer-border);
    padding: 24px;
    text-align: center;
    font-size: 0.82rem;
    color: var(--hub-text-muted);
    margin-top: auto;
}

.hub-footer a {
    color: var(--hub-accent);
    text-decoration: none;
}

.hub-footer a:hover {
    text-decoration: underline;
}

/* ==========================================================================
   Mobile Adjustments
   ========================================================================== */
@media (max-width: 640px) {
    .hub-hero {
        padding: 32px 16px 28px;
    }

    .hub-title {
        font-size: 1.5rem;
    }

    .hub-subtitle {
        font-size: 0.95rem;
    }

    .hub-main {
        padding: 24px 16px 40px;
    }

    .hub-grid {
        gap: 16px;
    }

    /* Stack card content vertically on mobile */
    .hub-card {
        flex-direction: column;
        padding: 20px 18px 20px calc(18px + var(--hub-accent-width));
    }

    .hub-card-icon {
        margin-right: 0;
        margin-bottom: 14px;
    }
}