:root {
    --bg-start: #f5f7fb;
    --bg-end: #dfe8f0;
    --surface: #ffffff;
    --surface-alt: #f3f6f9;
    --border: #d6dde6;
    --text: #183247;
    --muted: #5f7384;
    --accent: #2c8f5d;
    --shadow: 0 22px 60px rgba(18, 40, 56, 0.16);
    --radius-lg: 28px;
    --radius-md: 18px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
    font-family: Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(44, 143, 93, 0.18), transparent 30%),
        linear-gradient(180deg, var(--bg-start), var(--bg-end));
}

body {
    padding: 24px;
}

img {
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
}

.page-shell {
    width: min(1100px, 100%);
    margin: 0 auto;
}

.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 24px;
}

.brand-logo {
    width: clamp(88px, 12vw, 132px);
    height: auto;
}

.header-copy {
    flex: 1;
    text-align: right;
}

.eyebrow,
.section-label,
.detail-label {
    margin: 0;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
}

.reference-number {
    margin: 8px 0 10px;
    font-family: "Courier New", monospace;
    font-size: clamp(1.5rem, 3vw, 2.45rem);
    line-height: 1.15;
    word-break: break-word;
}

.reference-meta {
    margin: 0;
    color: var(--muted);
    font-size: 1rem;
    font-weight: 700;
    text-transform: capitalize;
}

.certificate-card {
    padding: clamp(22px, 4vw, 36px);
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid rgba(255, 255, 255, 0.55);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}

.certificate-layout {
    display: grid;
    grid-template-columns: minmax(250px, 320px) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 40px);
    align-items: start;
}

.profile-panel {
    display: grid;
    gap: 18px;
}

.photo-frame {
    position: relative;
    aspect-ratio: 4 / 5;
    overflow: hidden;
    border-radius: calc(var(--radius-lg) - 8px);
    background:
        linear-gradient(135deg, rgba(24, 50, 71, 0.08), rgba(44, 143, 93, 0.12)),
        var(--surface-alt);
    border: 1px solid var(--border);
}

.photo-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
}

.profile-copy,
.course-summary,
.detail-item,
.error-state {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

.profile-copy,
.course-summary,
.error-state {
    padding: 20px;
}

.trainee-name,
.course-name {
    margin: 10px 0 0;
    line-height: 1.2;
}

.trainee-name {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

.certificate-badge {
    display: inline-flex;
    margin: 14px 0 0;
    padding: 10px 14px;
    border-radius: 999px;
    background: rgba(44, 143, 93, 0.12);
    color: var(--accent);
    font-weight: 700;
    text-transform: capitalize;
}

.details-panel {
    display: grid;
    gap: 18px;
}

.course-name {
    font-size: clamp(1.4rem, 2.8vw, 2.1rem);
}

.course-description {
    margin: 14px 0 0;
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.7;
}

.details-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.detail-item {
    padding: 18px 20px;
}

.detail-value {
    display: block;
    margin-top: 10px;
    font-size: 1.05rem;
    line-height: 1.5;
    word-break: break-word;
}

.detail-reference {
    font-family: "Courier New", monospace;
}

.error-state {
    text-align: center;
    padding: 48px 24px;
}

.error-state h2 {
    margin: 0 0 10px;
    font-size: 1.8rem;
}

.error-state p {
    margin: 10px 0 0;
    color: var(--muted);
}

.social-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    color: var(--muted);
}

.social-links a {
    transition: transform 0.2s ease, color 0.2s ease;
}

.social-links a:hover {
    color: var(--accent);
    transform: translateY(-2px);
}

@media (max-width: 820px) {
    body {
        padding: 16px;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-copy {
        width: 100%;
        text-align: left;
    }

    .certificate-layout {
        grid-template-columns: 1fr;
    }

    .profile-panel {
        grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
        align-items: center;
    }
}

@media (max-width: 640px) {
    .profile-panel,
    .details-grid {
        grid-template-columns: 1fr;
    }

    .photo-frame {
        max-width: 360px;
        margin: 0 auto;
    }

    .profile-copy {
        text-align: center;
    }

    .certificate-badge {
        justify-content: center;
        text-transform: capitalize;
    }
}