@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;700;800&family=Inter:wght@400;600;700;800&display=swap');

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

:root {
    --bg:       #0a2832;
    --bg-deep:  #061820;
    --bg-panel: #0d2028;
    --bg-card:  #0f2a35;
    --border:   #1a4050;
    --border-hi:#00b0b0;
    --teal:     #008080;
    --teal-hi:  #00b0b0;
    --teal-dim: #005050;
    --text:     #e0f0f0;
    --text-dim: #809090;
    --text-mid: #a0c0c0;
    --mono:     'JetBrains Mono', 'Consolas', monospace;
    --sans:     'Inter', system-ui, sans-serif;
}

html { scroll-behavior: smooth }
body {
    font-family: var(--mono);
    background: var(--bg-deep);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--teal-hi); text-decoration: none }
a:hover { color: #fff }

::selection { background: var(--teal); color: #000 }

::-webkit-scrollbar { width: 8px }
::-webkit-scrollbar-track { background: var(--bg-deep) }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px }
::-webkit-scrollbar-thumb:hover { background: var(--teal) }

.topbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(6, 24, 32, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color .3s;
}
.topbar-solid { border-bottom-color: var(--border) }
.topbar-inner {
    max-width: 1100px; margin: 0 auto;
    padding: 0 24px; height: 56px;
    display: flex; align-items: center; justify-content: space-between;
}
.topbar-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700 }
.topbar-logo { width: 28px; height: 28px; border-radius: 4px }
.topbar-name { font-size: 16px; letter-spacing: 1px }
.topbar-right { display: flex; gap: 28px; align-items: center }
.topbar-right a { color: var(--text-dim); font-size: 13px; font-weight: 600 }
.topbar-right a:hover { color: #fff }
.topbar-gh {
    padding: 4px 12px;
    border: 1px solid var(--border);
    border-radius: 3px;
}
.topbar-gh:hover { border-color: var(--teal); color: var(--teal-hi) }

.hero {
    position: relative;
    min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    text-align: center;
    padding: 100px 24px 80px;
    background: linear-gradient(180deg, #091118 0%, var(--bg) 50%, #071e28 100%);
    overflow: hidden;
}

.grid-bg {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(0,128,128,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,128,128,0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

.hero-glow {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -60%);
    width: 600px; height: 600px;
    background: radial-gradient(ellipse, rgba(0,176,176,0.12) 0%, transparent 70%);
    pointer-events: none;
    animation: glow-pulse 4s ease-in-out infinite;
}
@keyframes glow-pulse {
    0%,100% { opacity: .5; transform: translate(-50%,-60%) scale(1) }
    50%     { opacity: .9; transform: translate(-50%,-60%) scale(1.08) }
}

.hero-scanline {
    position: absolute; inset: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0,0,0,0.03) 2px,
        rgba(0,0,0,0.03) 4px
    );
    pointer-events: none;
}

.hero-content { position: relative; max-width: 700px }

.hero-frame {
    background: rgba(10, 40, 50, 0.5);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 24px 20px 20px;
    backdrop-filter: blur(8px);
    margin-bottom: 28px;
}

.hero-ascii {
    font-family: var(--mono);
    font-size: clamp(8px, 1.4vw, 13px);
    line-height: 1.3;
    color: var(--teal-hi);
    text-shadow: 0 0 20px rgba(0,176,176,0.3);
    animation: ascii-glow 3s ease-in-out infinite;
    user-select: none;
    white-space: pre;
    margin: 0;
}
@keyframes ascii-glow {
    0%,100% { opacity: .75 }
    50%     { opacity: 1; text-shadow: 0 0 30px rgba(0,176,176,0.5) }
}

.hero-tagline {
    font-family: var(--sans);
    font-size: clamp(18px, 3vw, 24px);
    font-weight: 800;
    color: var(--text-dim);
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-top: 8px;
}

.hero-bar-track {
    width: 320px; max-width: 100%;
    height: 6px;
    background: var(--bg-deep);
    border: 1px solid var(--border);
    border-radius: 3px;
    margin: 0 auto 6px;
    overflow: hidden;
}
.hero-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--teal), var(--teal-hi));
    border-radius: 2px;
    animation: bar-fill 2.5s ease-out forwards;
    box-shadow: 0 0 8px rgba(0,176,176,0.4);
}
@keyframes bar-fill {
    0% { width: 0 }
    100% { width: 100% }
}

.hero-bar-label {
    font-size: 11px;
    color: var(--teal-hi);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 32px;
    animation: label-fade 2.5s ease-out forwards;
    opacity: 0;
}
@keyframes label-fade {
    0%,60% { opacity: 0 }
    100% { opacity: 1 }
}

.hero-desc {
    font-family: var(--sans);
    font-size: 16px;
    color: var(--text-dim);
    line-height: 1.8;
    margin-bottom: 32px;
}
.hero-desc strong { color: var(--text) }

.hero-actions {
    display: flex; gap: 14px;
    justify-content: center; flex-wrap: wrap;
    margin-bottom: 40px;
}

.btn-primary {
    display: inline-flex; flex-direction: column; align-items: center; gap: 2px;
    padding: 12px 28px;
    background: var(--teal);
    color: #fff;
    font-family: var(--mono);
    font-size: 14px;
    font-weight: 700;
    border: 1px solid var(--teal-hi);
    border-radius: 4px;
    cursor: pointer;
    transition: all .2s;
    text-decoration: none;
    text-align: center;
}
.btn-primary:hover {
    background: var(--teal-hi);
    color: #000;
    box-shadow: 0 0 20px rgba(0,176,176,0.3);
}
.btn-sub {
    font-size: 10px;
    font-weight: 600;
    opacity: 0.8;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.btn-ghost {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 12px 28px;
    background: transparent;
    color: var(--text-dim);
    font-family: var(--mono);
    font-size: 14px;
    font-weight: 700;
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    transition: all .2s;
    text-decoration: none;
}
.btn-ghost:hover {
    border-color: var(--teal);
    color: var(--teal-hi);
}

.hero-badges {
    display: flex; gap: 10px;
    justify-content: center; flex-wrap: wrap;
}
.hero-badges span {
    padding: 4px 12px;
    background: rgba(0,128,128,0.1);
    border: 1px solid var(--border);
    border-radius: 3px;
    font-size: 11px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pane {
    padding: 80px 24px;
    background: var(--bg-deep);
    border-top: 1px solid var(--border);
}
.pane-alt {
    background: var(--bg);
}
.pane-inner {
    max-width: 1100px;
    margin: 0 auto;
}
.pane-title {
    text-align: center;
    font-family: var(--mono);
    font-size: clamp(20px, 3vw, 28px);
    font-weight: 800;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 56px;
    color: var(--text);
}
.pane-title-accent {
    color: var(--teal);
    font-weight: 400;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 28px;
    transition: border-color .3s, box-shadow .3s;
}
.feature-card:hover {
    border-color: var(--teal);
    box-shadow: 0 0 16px rgba(0,128,128,0.1);
}
.feature-icon {
    font-size: 28px;
    margin-bottom: 12px;
}
.feature-card h3 {
    font-family: var(--sans);
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}
.feature-card p {
    font-family: var(--sans);
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.6;
}
.feature-tags {
    margin-top: 14px;
    font-size: 11px;
    color: var(--teal-dim);
    letter-spacing: 0.5px;
}

.desktop-rows {
    max-width: 800px;
    margin: 0 auto;
}
.desktop-row {
    display: flex;
    border-bottom: 1px solid var(--border);
    padding: 14px 0;
}
.desktop-row:last-child { border-bottom: none }
.desktop-key {
    width: 120px;
    flex-shrink: 0;
    font-size: 12px;
    color: var(--teal-hi);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding-top: 2px;
}
.desktop-val {
    font-family: var(--sans);
    font-size: 14px;
    color: var(--text-dim);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    max-width: 900px;
    margin: 0 auto 48px;
}
.step {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 24px;
}
.step-num {
    font-size: 32px;
    font-weight: 800;
    color: var(--teal);
    margin-bottom: 12px;
    opacity: 0.5;
}
.step h4 {
    font-family: var(--sans);
    font-size: 16px;
    margin-bottom: 8px;
}
.step p {
    font-family: var(--sans);
    font-size: 13px;
    color: var(--text-dim);
    margin-bottom: 14px;
}
.step-note {
    font-size: 12px !important;
    color: var(--text-dim) !important;
    margin-top: 8px;
    opacity: 0.7;
}
.step-meta {
    display: flex;
    gap: 14px;
    margin-top: 12px;
    flex-wrap: wrap;
}
.step-link {
    font-family: var(--mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--teal-hi);
    border-bottom: 1px dotted var(--border);
    padding-bottom: 1px;
}
.step-link:hover { color: #fff; border-bottom-color: var(--teal-hi) }

.term {
    background: var(--bg-deep);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 10px 14px;
    overflow-x: auto;
}
.term code {
    font-family: var(--mono);
    font-size: 13px;
    color: var(--teal-hi);
    background: none;
    padding: 0;
}
.term-block {
    max-width: 500px;
    margin: 16px auto 0;
    text-align: left;
}
.term-block code {
    line-height: 1.8;
}

.build-section {
    text-align: center;
    border-top: 1px solid var(--border);
    padding-top: 40px;
}
.build-section h3 {
    font-family: var(--mono);
    font-size: 16px;
    font-weight: 700;
    color: var(--text-dim);
    margin-bottom: 16px;
    letter-spacing: 1px;
}
.build-note {
    font-family: var(--sans);
    font-size: 13px;
    color: var(--text-dim);
    margin-top: 12px;
}

.roadmap {
    max-width: 700px;
    margin: 0 auto;
}
.roadmap-row {
    display: flex;
    align-items: baseline;
    gap: 14px;
    padding: 14px 0;
    border-left: 2px solid var(--border);
    padding-left: 24px;
    position: relative;
}
.roadmap-row.done {
    border-left-color: var(--teal);
}
.roadmap-dot {
    position: absolute;
    left: -6px;
    font-size: 10px;
    color: var(--border);
}
.roadmap-row.done .roadmap-dot {
    color: var(--teal-hi);
    text-shadow: 0 0 6px rgba(0,176,176,0.4);
}
.roadmap-text {
    font-family: var(--sans);
    font-size: 14px;
    color: var(--text-dim);
}

.footer {
    border-top: 1px solid var(--border);
    padding: 56px 24px 24px;
    background: var(--bg-deep);
}
.footer-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}
.footer-brand { max-width: 280px }
.footer-ascii {
    font-family: var(--mono);
    font-size: 11px;
    line-height: 1.3;
    color: var(--teal);
    text-shadow: 0 0 12px rgba(0,128,128,0.2);
    margin-bottom: 12px;
    user-select: none;
}
.footer-brand p {
    font-family: var(--sans);
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.7;
}
.footer-links {
    display: flex;
    gap: 56px;
    flex-wrap: wrap;
}
.footer-links h5 {
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-dim);
    margin-bottom: 10px;
}
.footer-links a {
    display: block;
    font-family: var(--sans);
    font-size: 13px;
    color: var(--text-dim);
    padding: 3px 0;
}
.footer-links a:hover { color: var(--teal-hi) }

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 20px;
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}
.footer-bottom span {
    font-size: 12px;
    color: var(--text-dim);
    opacity: 0.6;
}

@media (max-width: 768px) {
    .topbar-right a:not(.topbar-gh) { display: none }
    .hero { padding: 80px 16px 60px; min-height: auto }
    .hero-ascii { font-size: 6px }
    .pane { padding: 56px 16px }
    .feature-grid { grid-template-columns: 1fr }
    .desktop-row { flex-direction: column; gap: 4px }
    .desktop-key { width: auto }
    .footer-links { gap: 28px }
    .footer-inner { flex-direction: column }
}