/* about page */

/* about hero */
.about-hero {
    padding: calc(var(--nav-height) + var(--space-4xl)) var(--content-padding) var(--space-4xl);
    text-align: center;
}

.about-hero h1 {
    margin-bottom: var(--space-md);
}

.about-hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto;
    color: var(--color-text-secondary);
}

/* about content */
.about-content {
    padding: 0 var(--content-padding) var(--space-4xl);
}

.about-columns {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    gap: var(--space-3xl);
    align-items: flex-start;
}

.about-col {
    flex: 1;
}

.about-col p {
    text-align: justify;
    line-height: 1.9;
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.about-divider {
    width: 1px;
    align-self: stretch;
    background: linear-gradient(180deg, transparent, var(--color-border-strong), transparent);
    flex-shrink: 0;
}

.founder-sig {
    display: block;
    margin-top: var(--space-xl);
    font-style: italic;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    position: relative;
    padding-left: var(--space-xl);
}

.founder-sig::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 16px;
    height: 1px;
    background: var(--color-border-strong);
}

@media (max-width: 768px) {
    .about-columns {
        flex-direction: column;
        gap: var(--space-2xl);
    }

    .about-divider {
        width: 80px;
        height: 1px;
        background: linear-gradient(90deg, transparent, var(--color-border-strong), transparent);
        align-self: center;
    }

    .about-hero {
        padding-top: calc(var(--nav-height) + var(--space-2xl));
    }
}

/* timeline roadmap */
.roadmap-section {
    padding: 0 var(--content-padding) var(--space-4xl);
    text-align: center;
}

.roadmap-container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.roadmap-subtitle {
    margin-bottom: var(--space-3xl);
    color: var(--color-text-secondary);
    font-size: 1.05rem;
}

.timeline {
    position: relative;
    max-width: 650px;
    margin: 0 auto;
    padding: var(--space-xl) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, black 10%, black 90%, transparent 100%);
    mask-image: linear-gradient(to bottom, transparent 0%, black 10%, black 90%, transparent 100%);
}

.timeline-item {
    position: relative;
    padding-left: 55px;
    margin-bottom: var(--space-2xl);
    text-align: left;
}

.timeline-dot {
    position: absolute;
    left: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 2px solid var(--color-border-strong);
    z-index: 2;
    transition: all var(--duration-normal) var(--ease-out);
}

.timeline-item.completed .timeline-dot {
    background: var(--color-text);
    border-color: var(--color-text);
    box-shadow: 0 0 0 4px rgba(26, 18, 6, 0.05);
}

.timeline-item.current .timeline-dot {
    background: var(--color-accent);
    border-color: var(--color-accent);
    box-shadow: 0 0 0 6px rgba(231, 111, 81, 0.15);
}

.timeline-content {
    background: var(--color-surface);
    padding: var(--space-xl);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--duration-normal) var(--ease-out);
    box-shadow: var(--shadow-sm);
}

.timeline-item.current .timeline-content {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-lg);
    transform: scale(1.02);
}

.timeline-phase {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: 8px;
    letter-spacing: 0.1em;
}

.timeline-content h3 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    margin-bottom: var(--space-md);
}

.timeline-content ul {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.timeline-content li {
    position: relative;
    padding-left: 22px;
    margin-bottom: 8px;
}

.timeline-content li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    opacity: 0.6;
    font-size: 0.8rem;
    top: 1px;
}