* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --background-light: #ffffff;
    --foreground-light: #1a1a1a;
    --background-dark: #1a1a1a;
    --foreground-dark: #f5f5f5;
    --gray-300: #d4d4d8;
    --gray-400: #a1a1a8;
    --gray-500: #71717a;
    --gray-700: #3f3f46;
    --gray-800: #27272a;
    --blue-500: #3b82f6;
    --border-radius: 0.625rem;
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Geist', sans-serif;
    min-height: 100vh;
    padding: 1rem 2rem;
}

body.dark {
    background-color: var(--background-dark);
    color: var(--foreground-dark);
}

body.light {
    background-color: var(--background-light);
    color: var(--foreground-light);
}

.container {
    max-width: 56rem;
    margin: 0 auto;
}

/* Desktop View - Horizontal Transit Map */
.process-tracker-desktop {
    display: none;
}

.process-tracker-desktop.active {
    display: block;
}

.process-tracker-desktop {
    position: relative;
    width: 100%;
    padding: 2rem 0;
}

.track-background {
    position: absolute;
    top: 1rem;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--gray-700);
}

.track-progress {
    position: absolute;
    top: 1rem;
    left: 0;
    height: 2px;
    background-color: var(--blue-500);
    transition: var(--transition);
    width: 0%;
}

.nodes-container {
    display: flex;
    justify-content: space-between;
    position: relative;
    z-index: 10;
}

.node {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.node-circle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    border: 2px solid;
    font-size: 0.875rem;
    font-weight: 600;
    transition: var(--transition);
    z-index: 10;
}

.node-circle.completed {
    border-color: var(--blue-500);
    background-color: var(--blue-500);
    color: white;
}

.node-circle.active {
    border-color: var(--blue-500);
    background-color: var(--gray-800);
    color: var(--blue-500);
}

.node-circle.pending {
    border-color: var(--gray-600);
    background-color: var(--gray-800);
    color: var(--gray-500);
}

.node-label {
    position: absolute;
    top: 2.5rem;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.node-label.completed {
    color: var(--blue-500);
}

.node-label.active {
    color: var(--blue-500);
}

.node-label.pending {
    color: var(--gray-400);
}

/* Mobile View - Vertical Timeline */
.process-tracker-mobile {
    display: block;
}

.process-tracker-mobile {
    position: relative;
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
    position: relative;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.vertical-line {
    position: absolute;
    left: 1rem;
    top: 2rem;
    width: 2px;
    height: 1.5rem;
    background-color: var(--gray-700);
    transition: var(--transition);
    transform: translateX(-50%);
}

.vertical-line.completed {
    background-color: var(--blue-500);
}

.timeline-node {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    border: 2px solid;
    font-size: 0.875rem;
    font-weight: 600;
    transition: var(--transition);
    flex-shrink: 0;
    z-index: 10;
    position: relative;
}

.timeline-node.completed {
    border-color: var(--blue-500);
    background-color: var(--blue-500);
    color: white;
}

.timeline-node.active {
    border-color: var(--blue-500);
    background-color: var(--gray-800);
    color: var(--blue-500);
}

.timeline-node.pending {
    border-color: var(--gray-600);
    background-color: var(--gray-800);
    color: var(--gray-500);
}

.timeline-label {
    font-size: 0.875rem;
    font-weight: 500;
    padding-top: 0.25rem;
    transition: var(--transition);
}

.timeline-label.completed {
    color: var(--blue-500);
}

.timeline-label.active {
    color: var(--blue-500);
}

.timeline-label.pending {
    color: var(--gray-400);
}

/* Responsive */
@media (min-width: 768px) {
    .process-tracker-desktop {
        display: block;
    }

    .process-tracker-mobile {
        display: none;
    }
}

@media (max-width: 767px) {
    .process-tracker-desktop {
        display: none !important;
    }

    .process-tracker-mobile {
        display: block;
    }
}