/* About Page — Terminal Style */

.about-shell {
    min-height: 100vh;
    padding: calc(var(--nav-height) + 32px) 24px 56px;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    background: var(--bg);
    position: relative;
    overflow: hidden;
}

.about-terminal {
    width: min(1000px, 100%);
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.about-body {
    padding: 2rem;
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
}

.about-section {
    margin-bottom: 2rem;
}

.about-section:last-child {
    margin-bottom: 0;
}

.about-prompt {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    letter-spacing: 0.02em;
}

.about-prompt .prompt {
    color: var(--accent);
    margin-right: 0.35rem;
}

.about-title {
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--text);
    margin-bottom: 1rem;
    font-family: var(--mono);
}

.about-desc {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 420px;
}

/* Metrics */
.about-metrics {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.metric-card {
    padding: 1rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.metric-number {
    display: block;
    font-family: var(--mono);
    font-size: clamp(2rem, 3vw, 2.5rem);
    font-weight: 700;
    line-height: 1;
    color: var(--text);
    margin-bottom: 0.35rem;
    font-variant-numeric: tabular-nums;
}

.metric-label {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--text-muted);
    text-transform: lowercase;
    letter-spacing: 0.04em;
}

/* Notes */
.about-note {
    padding: 1rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.about-note p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

/* Skill Tags */
.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    font-family: var(--mono);
    font-size: 0.78rem;
    padding: 0.4rem 0.85rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: all 0.2s ease;
    letter-spacing: 0.02em;
}

.skill-tag:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(230, 0, 35, 0.06);
}

/* Contact Block */
.contact-block {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.contact-line {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.contact-key {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    min-width: 5rem;
}

.contact-val {
    font-family: var(--mono);
    font-size: 0.85rem;
    color: var(--text);
}

.status-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    background: #22c55e;
    border-radius: 50%;
    box-shadow: 0 0 6px rgba(34, 197, 94, 0.4);
    animation: pulse 2s ease infinite;
}

.wechat-copy {
    font-family: var(--mono);
    font-size: 0.72rem;
    padding: 0.25rem 0.6rem;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 3px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
}

.wechat-copy:hover {
    border-color: var(--border-strong);
    color: var(--text);
    background: var(--bg-hover);
}

.wechat-copy.is-copied {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

/* Responsive */
@media (max-width: 860px) {
    .about-shell {
        padding: calc(var(--nav-height) + 24px) 16px 32px;
    }

    .about-body {
        padding: 1.25rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .about-desc {
        max-width: none;
    }

    .about-metrics {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 380px) {
    .about-body {
        padding: 1rem;
    }

    .metric-card {
        padding: 0.75rem;
    }

    .skill-tag {
        font-size: 0.72rem;
        padding: 0.35rem 0.7rem;
    }
}

/* WeChat QR Code */
.contact-qr {
    margin-top: 1rem;
    padding: 0.75rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    display: inline-block;
}

.contact-qr img {
    width: 100%;
    max-width: 120px;
    height: auto;
    display: block;
    border-radius: 4px;
}