/* about.css — About section styles and animations.
   Kept separate so animations can be modified independently. */

/* ── Pipeline Animation (About section) ──────────────────────── */

.about-pipeline {
    display: flex;
    flex-direction: column;
    gap: 28px;
    padding: 32px 28px;
    background: var(--surface-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    position: relative;
    overflow: hidden;
}

/* Subtle top-left glow */
.about-pipeline::before {
    content: '';
    position: absolute;
    top: -40px;
    left: -40px;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, color-mix(in srgb, var(--accent-color) 18%, transparent), transparent 70%);
    pointer-events: none;
}

/* The horizontal track of steps + connectors */
.pipeline-track {
    display: flex;
    align-items: center;
    gap: 0;
    width: 100%;
}

/* Individual step node */
.pipeline-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.pipeline-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--surface-primary);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition:
        border-color 0.35s ease,
        background   0.35s ease,
        transform    0.35s cubic-bezier(0.34, 1.56, 0.64, 1),
        box-shadow   0.35s ease;
}

.pipeline-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-tertiary);
    letter-spacing: 0.02em;
    transition: color 0.35s ease;
    white-space: nowrap;
}

/* Active state */
.pipeline-step--active .pipeline-icon {
    border-color: var(--accent-color);
    background: color-mix(in srgb, var(--accent-color) 10%, var(--surface-primary));
    transform: scale(1.15);
    box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent-color) 14%, transparent);
}
.pipeline-step--active .pipeline-label {
    color: var(--accent-color);
}

/* Done state */
.pipeline-step--done .pipeline-icon {
    border-color: color-mix(in srgb, var(--accent-color) 55%, transparent);
    background: color-mix(in srgb, var(--accent-color) 8%, var(--surface-primary));
}
.pipeline-step--done .pipeline-label {
    color: var(--text-secondary);
}

/* Connector line between steps */
.pipeline-connector {
    flex: 1;
    height: 2px;
    background: var(--border-color);
    position: relative;
    /* sits at icon centre — offset for icon (48px) + label (≈28px) offset not needed
       because flexbox centres the icon and label is below */
    margin-bottom: 28px; /* visually align with icon centres */
    align-self: flex-start;
    margin-top: 23px;    /* (48px icon / 2) - (2px line / 2) = 23px */
    overflow: hidden;
    border-radius: 2px;
}

.pipeline-connector-fill {
    position: absolute;
    inset: 0;
    background: var(--accent-color);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 2px;
}

.pipeline-fill--active .pipeline-connector-fill,
.pipeline-fill--done   .pipeline-connector-fill {
    transform: scaleX(1);
}

/* Status bar below the track */
.pipeline-status {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pipeline-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-color);
    flex-shrink: 0;
    animation: pipeline-pulse 1.4s ease-in-out infinite;
}

.pipeline-status-dot--done {
    animation: none;
    background: #30D158;
}

@keyframes pipeline-pulse {
    0%, 100% { opacity: 1;   transform: scale(1);    }
    50%       { opacity: 0.4; transform: scale(0.75); }
}

.pipeline-status-text {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-tertiary);
    letter-spacing: 0.01em;
    transition: color 0.3s ease;
}

/* Responsive — stack pipeline vertically on narrow screens */
@media (max-width: 640px) {
    .pipeline-track {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
    .pipeline-connector {
        width: 2px;
        height: 24px;
        margin: 0 0 0 23px; /* align to icon centre (48/2 - 2/2 = 23) */
        flex: none;
    }
    .pipeline-connector-fill {
        transform-origin: top;
        transform: scaleY(0);
    }
    .pipeline-fill--active .pipeline-connector-fill,
    .pipeline-fill--done   .pipeline-connector-fill {
        transform: scaleY(1);
    }
    .pipeline-step {
        flex-direction: row;
        gap: 12px;
    }
    .pipeline-label {
        font-size: 13px;
    }
}