:root {
    --bg-dark: #796de7ce;
    --panel-bg: rgba(11, 16, 34, 0.92);
    --border: rgba(255,255,255,0.16);
    --text-main: #eef2ff;
    --text-muted: rgba(226, 232, 240, 0.78);
    --accent: #7c3aed;
    --line-color: rgba(255,255,255,0.16);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, var(--bg-dark), rgb(141, 250, 129));
    color: var(--text-main);
}

.timeline-shell {
    max-width: 1080px;
    margin: 26px auto 40px;
    padding: 36px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: 32px;
    backdrop-filter: blur(18px);
    box-shadow: 0 26px 84px rgba(0,0,0,0.14);
}

.page-hero {
    text-align: center;
    margin-bottom: 34px;
}

.eyebrow {
    display: inline-flex;
    margin-bottom: 1rem;
    color: rgba(255,255,255,0.72);
    letter-spacing: 0.22em;
    text-transform: uppercase;
    font-size: 0.85rem;
}

.page-hero h1 {
    margin: 0;
    font-size: clamp(2.8rem, 4vw, 3.6rem);
}

.hero-copy {
    margin: 1rem auto 0;
    max-width: 720px;
    color: var(--text-muted);
    line-height: 1.8;
}

.timeline-container {
    position: relative;
    display: grid;
    gap: 2rem;
    padding-top: 24px;
}

.timeline-line {
    position: absolute;
    left: 30px;
    top: 20px;
    bottom: 20px;
    width: 4px;
    background: linear-gradient(180deg, rgba(255,255,255,0.3), rgba(124, 58, 237, 0.85));
    border-radius: 999px;
}

.timeline-progress {
    position: absolute;
    left: 30px;
    top: 20px;
    width: 4px;
    height: 0;
    background: linear-gradient(180deg, #8b5cf6, #22d3ee);
    border-radius: 999px;
    transition: height 0.2s ease;
}

.timeline-item {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 1rem;
    padding: 26px 26px 26px 84px;
    background: rgba(20, 24, 48, 0.95);
    border: 1px solid var(--border);
    border-radius: 28px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.14);
    overflow: hidden;
}

.timeline-point {
    position: absolute;
    left: 18px;
    top: 36px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, #7c3aed, #22d3ee);
    box-shadow: 0 0 24px rgba(34, 211, 238, 0.35);
}

.timeline-item:nth-child(even) .timeline-point {
    top: 36px;
}

.timeline-date {
    display: inline-flex;
    align-items: center;
    padding: 0.7rem 0.95rem;
    border-radius: 999px;
    background: rgba(255,255,255,0.08);
    color: #dbeafe;
    letter-spacing: 0.08em;
    font-size: 0.92rem;
    text-transform: uppercase;
}

.timeline-title {
    margin: 1rem 0 0.85rem;
    font-size: clamp(1.45rem, 2.2vw, 1.9rem);
}

.timeline-desc {
    margin: 0;
    color: var(--text-muted);
    line-height: 1.75;
}

.primary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.95rem 1.5rem;
    color: #fff;
    background: linear-gradient(135deg, rgba(75, 85, 255, 0.96), rgba(56, 189, 248, 0.92));
    border-radius: 999px;
    text-decoration: none;
    font-weight: 700;
    box-shadow: 0 18px 42px rgba(75, 85, 255, 0.22);
}

.primary-button:hover,
.primary-button:focus-visible {
    transform: translateY(-2px);
}

@media (max-width: 900px) {
    .timeline-container {
        padding-left: 0;
    }

    .timeline-line,
    .timeline-progress {
        left: 16px;
    }

    .timeline-item {
        padding-left: 60px;
    }

    .timeline-point {
        left: 8px;
    }
}

@media (max-width: 600px) {
    .page-hero h1 {
        font-size: 2.4rem;
    }

    .timeline-item {
        padding: 22px 18px 22px 56px;
    }

    .timeline-title {
        font-size: 1.5rem;
    }
}