:root {
    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.14);
    --focus: #06b6d4;
    }

    /* "Glass" surface used throughout */
    .glass {
    background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.02));
    border: 1px solid rgba(0,0,0,0.06);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    }

    .dark .glass {
    background: linear-gradient(180deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
    border: 1px solid rgba(255,255,255,0.08);
    }

    .card-border {
    border-radius: 16px;
    }

    /* Skip link: visible only on focus */
    .skip-link {
    position: absolute;
    left: 12px;
    top: 12px;
    z-index: 100;
    padding: 10px 12px;
    border-radius: 10px;
    font-weight: 700;
    text-decoration: none;
    background: rgba(6, 182, 212, 0.95);
    color: #021126;
    transform: translateY(-140%);
    transition: transform 150ms ease;
    }
    .skip-link:focus {
    transform: translateY(0);
    outline: 2px solid rgba(2,6,23,0.5);
    outline-offset: 2px;
    }

    /* A11y focus style: applied when JS adds .focus-outline to body */
    .focus-outline :focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
    border-radius: 10px;
    }

    /* Helper: inputs in contact form */
    .focus-ring:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 2px;
    }

    /* Small UI building blocks used in index */
    .chip {
    font-size: 12px;
    padding: 8px 10px;
    border-radius: 10px;
    background: rgba(0,0,0,0.05);
    }
    .dark .chip { background: rgba(255,255,255,0.06); }

    .pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    border-radius: 999px;
    background: rgba(0,0,0,0.05);
    }
    .dark .pill { background: rgba(255,255,255,0.06); }

    /* Certificate action buttons */
    .btn-primary,
    .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 10px 12px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    }

    .btn-primary {
    background: linear-gradient(90deg, rgba(34,211,238,1), rgba(167,139,250,1));
    color: #021126;
    }

    .btn-secondary {
    border: 1px solid rgba(0,0,0,0.10);
    color: rgba(15,23,42,1);
    background: rgba(255,255,255,0.0);
    }

    .dark .btn-secondary {
    border: 1px solid rgba(255,255,255,0.14);
    color: rgba(226,232,240,1);
    }

    .is-disabled {
    opacity: 0.55;
    cursor: not-allowed;
    filter: grayscale(25%);
    }

    /* Certificate status line (below title/description) */
    .cert-status {
    margin-top: 8px;
    font-size: 12px;
    opacity: 0.8;
    }

    /* Timeline styling */
    .timeline-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    }

    .timeline-dot {
    width: 10px;
    height: 10px;
    margin-top: 6px;
    border-radius: 999px;
    background: var(--focus);
    flex: 0 0 auto;
    }

    /* Toast */
    .toast {
    position: fixed;
    left: 50%;
    bottom: 20px;
    transform: translateX(-50%);
    z-index: 60;
    max-width: min(560px, calc(100vw - 24px));
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid rgba(0,0,0,0.12);
    background: rgba(255,255,255,0.92);
    color: rgba(15,23,42,1);
    box-shadow: 0 12px 40px rgba(2,6,23,0.20);
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms ease;
    }

    .dark .toast {
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(2,6,23,0.86);
    color: rgba(226,232,240,1);
    }

    .toast.toast--show {
    opacity: 1;
    pointer-events: auto;
    }

        #particles{
    position:fixed;
    inset:0;
    z-index:-2;
    pointer-events:none;
    }
    #particles canvas{
    display:block;
}

    /* Reduced motion support */
    @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }

    .animate-floaty,
    .animate-hue {
        animation: none !important;
    }

    * {
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    }