/* ================================================
           VARIABLES LOCALES
           ================================================ */
        :root {
            --nav-height: 70px;
            --border: rgba(0,0,0,0.1);
            --border-soft: rgba(0,0,0,0.06);
        }

        [data-theme="dark"] {
            --border: rgba(255,255,255,0.1);
            --border-soft: rgba(255,255,255,0.06);
        }

        /* ================================================
           NAV MÍNIMO — solo para esta página
           ================================================ */
        #cert-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 var(--space-lg);
            background-color: var(--color-primary);
            border-bottom: 0.5px solid var(--border-soft);
            z-index: 1000;
            transition: background-color var(--transition), border-color var(--transition);
        }

        #cert-nav.scrolled {
            border-bottom-color: var(--border);
        }

        /* Lado izquierdo — logo */
        #cert-nav-left {
            display: flex;
            align-items: center;
            gap: var(--space-md);
            text-decoration: none;
        }

        /* Links mínimos */
        #cert-nav-links {
            display: flex;
            align-items: center;
            gap: var(--space-md);
        }

        .cert-nav-link {
            font-size: 0.75rem;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--text-muted);
            text-decoration: none;
            font-weight: 500;
            position: relative;
            transition: color var(--transition);
        }

        .cert-nav-link::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 1px;
            background-color: var(--accent);
            transition: width var(--transition);
        }

        .cert-nav-link:hover,
        .cert-nav-link.active {
            color: var(--text);
            opacity: 1;
        }

        .cert-nav-link:hover::after,
        .cert-nav-link.active::after {
            width: 100%;
        }

        /* Lado derecho — tema */
        #cert-nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        /* Separador vertical entre logo y links */
        .nav-sep {
            width: 1px;
            height: 18px;
            background-color: var(--border);
        }

        @media (max-width: 768px) {
            #cert-nav {
                padding: 0 var(--space-sm);
            }

            #cert-nav-links {
                gap: var(--space-sm);
            }

            .cert-nav-link {
                font-size: 0.7rem;
            }
        }

        /* ================================================
           HERO
           ================================================ */
        #cert-hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: calc(var(--nav-height) + var(--space-lg));
            position: relative;
            overflow: hidden;
        }

        #cert-hero-content {
            max-width: 650px;
            z-index: 1;
            min-width: 400px;
        }

        #cert-hero h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            font-weight: 700;
            line-height: 1.1;
            margin-bottom: 0.75rem;
        }

        #cert-hero p {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 350px;
            margin-bottom: var(--space-md);
        }

        #cert-kanji {
            position: absolute;
            right: -20px;
            top: 50%;
            transform: translateY(-50%);
            font-family: var(--font-display);
            font-size: clamp(120px, 20vw, 220px);
            font-weight: 300;
            color: var(--text);
            line-height: 1;
            pointer-events: none;
            user-select: none;
            z-index: 0;
        }

        #cert-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.75rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--text-muted);
            margin-bottom: var(--space-sm);
        }

        #cert-breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition);
        }

        #cert-breadcrumb a:hover { color: var(--accent); opacity: 1; }
        #cert-breadcrumb .sep   { color: var(--accent); }

        #cert-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: var(--space-md);
        }

        .cert-chip {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: 0.75rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--text-muted);
            border: 0.5px solid var(--border);
            padding: 5px 14px;
            transition: border-color var(--transition), color var(--transition);
        }

        .cert-chip i      { color: var(--accent); font-size: 0.7rem; }
        .cert-chip:hover  { border-color: var(--accent); color: var(--accent); }

        #cert-btns {
            display: flex;
            gap: var(--space-sm);
            flex-wrap: wrap;
            align-items: flex-start;
        }

        .btn { padding: 0.75rem 1.5rem; }

        /* ================================================
           VISOR PDF
           ================================================ */
        #cert-viewer { border-top: 0.5px solid var(--border-soft); }

        #cert-frame-wrapper {
            position: relative;
            border: 0.5px solid var(--border);
            background-color: var(--color-primary);
            overflow: hidden;
            transition: border-color var(--transition);
        }

        #cert-frame-wrapper:hover { border-color: var(--accent); }

        #cert-frame-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 16px;
            border-bottom: 0.5px solid var(--border);
            background-color: var(--color-primary);
        }

        #cert-frame-bar-left {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .frame-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            border: 0.5px solid var(--border);
        }

        .frame-dot.red  { border-color: var(--accent); background-color: var(--accent); opacity: 0.7; }
        .frame-dot.gray { background-color: transparent; }

        #cert-frame-label {
            font-size: 0.7rem;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--text-muted);
        }

        #cert-frame-actions { display: flex; gap: 8px; }

        .frame-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.7rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--text-muted);
            border: 0.5px solid var(--border);
            padding: 4px 12px;
            text-decoration: none;
            transition: all var(--transition);
            background: transparent;
            cursor: pointer;
            font-family: var(--font-body);
        }

        .frame-btn:hover { border-color: var(--accent); color: var(--accent); opacity: 1; }

        #cert-iframe {
            width: 100%;
            height: 680px;
            display: block;
            border: none;
            background-color: #f0f0f0;
        }

        /* ================================================
           INFO CARDS
           ================================================ */
        #cert-info-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 10px;
            margin-top: var(--space-md);
        }

        .cert-info-card {
            padding: var(--space-sm);
            border: 0.5px solid var(--border);
            display: flex;
            flex-direction: column;
            gap: 4px;
            transition: border-color var(--transition);
        }

        .cert-info-card:hover { border-color: var(--accent); }

        .cert-info-label {
            font-size: 0.68rem;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--text-muted);
        }

        .cert-info-value {
            font-family: var(--font-display);
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text);
        }

        .cert-info-icon { color: var(--accent); font-size: 0.85rem; margin-bottom: 4px; }

        #cert-verify {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.78rem;
            color: var(--text-muted);
            border: 0.5px solid var(--border);
            padding: 8px 16px;
            margin-top: var(--space-sm);
            letter-spacing: 0.06em;
            
        }

        #cert-verify i { color: var(--accent); }
        #cert-verify a { color: var(--accent); font-weight: 500; }
        @media (max-width: 768px) {
            #cert-verify {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
                font-size: 0.72rem;
                word-break: break-all;
            }
        }

        @media (max-width: 768px) {
            #cert-iframe { height: 420px; }
            #cert-hero   { padding-top: calc(var(--nav-height) + var(--space-md)); }
            #cert-frame-actions { display: none; }
        }