/* =========================================================
   CERTIFICATIONS PAGE
   File: static/css/certificate.css
   ========================================================= */

:root {
    --certificate-bg: #07111f;
    --certificate-surface: #0f1c2e;
    --certificate-surface-hover: #14243a;
    --certificate-border: rgba(148, 163, 184, 0.2);
    --certificate-text: #f8fafc;
    --certificate-muted: #a8b3c5;
    --certificate-primary: #22d3ee;
    --certificate-secondary: #3b82f6;
    --certificate-shadow: 0 18px 45px rgba(0, 0, 0, 0.28);
}

.certifications-page,
.certifications-page * {
    box-sizing: border-box;
   overflow-y: hidden;
}

.certifications-page {
    min-height: 100vh;
    padding: 7rem 1.25rem 5rem;
    color: var(--certificate-text);
    background:
        radial-gradient(circle at 15% 15%, rgba(34, 211, 238, 0.1), transparent 30rem),
        radial-gradient(circle at 85% 85%, rgba(59, 130, 246, 0.1), transparent 30rem),
        var(--certificate-bg);
}

.certifications-container {
    width: min(1120px, 100%);
    margin: 0 auto;
}

/* Page heading */

.certifications-header {
    max-width: 760px;
    margin: 0 auto 3rem;
    text-align: center;
}

.certifications-icon {
    display: inline-grid;
    width: 74px;
    height: 74px;
    margin-bottom: 1.25rem;
    place-items: center;
    color: #06131f;
    font-size: 2rem;
    border-radius: 22px;
    background: linear-gradient(135deg, var(--certificate-primary), #67e8f9);
    box-shadow: 0 12px 30px rgba(34, 211, 238, 0.25);
}

.certifications-header h1 {
    margin: 0 0 1rem;
    color: var(--certificate-text);
    font-size: clamp(2.15rem, 5vw, 3.5rem);
    line-height: 1.1;
    letter-spacing: -0.04em;
}

.certifications-header p {
    margin: 0 auto;
    color: var(--certificate-muted);
    font-size: clamp(1rem, 2vw, 1.1rem);
    line-height: 1.8;
}

/* Certificate cards */

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
}

.certification-card {
    position: relative;
    display: flex;
    min-width: 0;
    min-height: 290px;
    gap: 1.25rem;
    padding: 1.75rem;
    overflow: hidden;
    color: inherit;
    text-decoration: none;
    border: 1px solid var(--certificate-border);
    border-radius: 22px;
    background: linear-gradient(145deg, rgba(20, 36, 58, 0.96), rgba(15, 28, 46, 0.96));
    box-shadow: var(--certificate-shadow);
    transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.certification-card::before {
    position: absolute;
    inset: 0 0 auto;
    height: 3px;
    content: "";
    background: linear-gradient(90deg, var(--certificate-primary), var(--certificate-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 220ms ease;
}

.certification-card::after {
    position: absolute;
    right: -80px;
    bottom: -90px;
    width: 190px;
    height: 190px;
    content: "";
    pointer-events: none;
    border-radius: 50%;
    background: rgba(34, 211, 238, 0.07);
}

.certification-card:hover {
    border-color: rgba(34, 211, 238, 0.55);
    box-shadow: 0 22px 55px rgba(0, 0, 0, 0.36), 0 0 28px rgba(34, 211, 238, 0.08);
    transform: translateY(-6px);
}

.certification-card:hover::before {
    transform: scaleX(1);
}

.certification-card:focus-visible {
    outline: 3px solid var(--certificate-primary);
    outline-offset: 4px;
}

.certification-card-icon {
    position: relative;
    z-index: 1;
    display: grid;
    flex: 0 0 58px;
    width: 58px;
    height: 58px;
    place-items: center;
    color: var(--certificate-primary);
    font-size: 1.65rem;
    border: 1px solid rgba(34, 211, 238, 0.25);
    border-radius: 16px;
    background: rgba(34, 211, 238, 0.1);
}

.certification-card-content {
    position: relative;
    z-index: 1;
    display: flex;
    min-width: 0;
    flex: 1;
    flex-direction: column;
}

.certification-card-content h2 {
    margin: 0 0 0.5rem;
    color: var(--certificate-text);
    font-size: 1.35rem;
    line-height: 1.3;
}

.certificate-provider {
    margin: 0 0 1rem;
    color: var(--certificate-primary);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    line-height: 1.5;
    text-transform: uppercase;
}

.certificate-description {
    margin: 0 0 1.5rem;
    color: var(--certificate-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

.certificate-button {
    display: inline-flex;
    width: fit-content;
    min-height: 42px;
    margin-top: auto;
    padding: 0.7rem 1rem;
    align-items: center;
    gap: 0.55rem;
    color: #06131f;
    font-size: 0.9rem;
    font-weight: 800;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--certificate-primary), #67e8f9);
    transition: transform 180ms ease, box-shadow 180ms ease;
}

.certification-card:hover .certificate-button {
    box-shadow: 0 10px 22px rgba(34, 211, 238, 0.22);
    transform: translateX(3px);
}

/* PDF preview modal */

.cert-modal {
    position: fixed;
    z-index: 9999;
    inset: 0;
    display: grid;
    padding: 2rem;
    place-items: center;
    background: rgba(2, 6, 23, 0.88);
    backdrop-filter: blur(8px);
}

.cert-modal.hidden {
    display: none;
}

.cert-modal-content {
    position: relative;
    width: min(1100px, 96vw);
    height: min(850px, 90vh);
    overflow: hidden;
    border: 1px solid rgba(148, 163, 184, 0.28);
    border-radius: 18px;
    background: #ffffff;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
}

.cert-modal-close {
    position: absolute;
    z-index: 2;
    top: 0.75rem;
    right: 0.75rem;
    display: grid;
    width: 44px;
    height: 44px;
    padding: 0;
    place-items: center;
    color: #ffffff;
    font: inherit;
    font-size: 1.85rem;
    line-height: 1;
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50%;
    background: rgba(7, 17, 31, 0.88);
    transition: background-color 180ms ease, transform 180ms ease;
}

.cert-modal-close:hover {
    background: #dc2626;
    transform: rotate(6deg);
}

.cert-modal-close:focus-visible {
    outline: 3px solid var(--certificate-primary);
    outline-offset: 3px;
}

.cert-modal-iframe {
    display: block;
    width: 100%;
    height: 100%;
    border: 0;
    background: #ffffff;
}

body.cert-modal-open {
    overflow: hidden;
}

/* Tablet and mobile */

@media (max-width: 850px) {
    .certifications-page {
        padding-top: 6rem;
    }

    .certifications-grid {
        grid-template-columns: 1fr;
    }

    .certification-card {
        min-height: 0;
    }
}

@media (max-width: 560px) {
    .certifications-page {
        padding: 5.5rem 1rem 3.5rem;
    }

    .certifications-header {
        margin-bottom: 2rem;
    }

    .certifications-icon {
        width: 62px;
        height: 62px;
        font-size: 1.65rem;
        border-radius: 18px;
    }

    .certification-card {
        flex-direction: column;
        gap: 1rem;
        padding: 1.35rem;
        border-radius: 18px;
    }

    .cert-modal {
        padding: 0.75rem;
    }

    .cert-modal-content {
        width: 100%;
        height: 94vh;
        border-radius: 14px;
    }
}

/* Accessibility */

@media (prefers-reduced-motion: reduce) {
    .certification-card,
    .certification-card::before,
    .certificate-button,
    .cert-modal-close {
        transition: none;
    }

    .certification-card:hover,
    .certification-card:hover .certificate-button,
    .cert-modal-close:hover {
        transform: none;
    }
}

@media (prefers-contrast: more) {
    .certification-card {
        border-color: #ffffff;
    }

    .certificate-description,
    .certifications-header p {
        color: #e2e8f0;
    }
}

/* Print-friendly certificate list */

@media print {
    .certifications-page {
        min-height: auto;
        padding: 1rem;
        color: #111827;
        background: #ffffff;
    }

    .certifications-grid {
        display: block;
    }

    .certification-card {
        min-height: auto;
        margin-bottom: 1rem;
        break-inside: avoid;
        color: #111827;
        border: 1px solid #cbd5e1;
        background: #ffffff;
        box-shadow: none;
    }

    .certification-card-content h2,
    .certifications-header h1 {
        color: #111827;
    }

    .certificate-description,
    .certifications-header p {
        color: #475569;
    }

    .certificate-button,
    .cert-modal {
        display: none !important;
    }
}