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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>SysScale — Ace Your System Design Interview</title>
<meta name="description" content="The only interactive system design prep tool with real capacity math, architecture diagrams, and structured reasoning cards. 16 systems. Free to use.">
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400&family=JetBrains+Mono:wght@400;500;700&display=swap" rel="stylesheet">
<style>
/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
background: #080E12;
color: #E2EDE8;
line-height: 1.6;
overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
/* ── Design tokens ──────────────────────────────────────── */
:root {
--teal: #2BA07E;
--teal2: #3DC298;
--teal3: rgba(43,160,126,0.12);
--teal-glow: 0 0 40px rgba(43,160,126,0.35), 0 0 80px rgba(43,160,126,0.15);
--dark: #080E12;
--dark2: #0D1A20;
--dark3: #142028;
--card: rgba(255,255,255,0.04);
--card-border: rgba(255,255,255,0.08);
--muted: #7DA898;
--r: 12px;
--r-lg: 18px;
--r-xl: 24px;
--mono: 'JetBrains Mono', monospace;
}
/* ── Utility ──────────────────────────────────────────────*/
.l-inner { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.l-section { padding: 96px 0; }
.l-badge {
display: inline-flex; align-items: center; gap: 8px;
font-family: var(--mono); font-size: 10px; font-weight: 700;
letter-spacing: .2em; text-transform: uppercase;
color: var(--teal); border: 1px solid rgba(43,160,126,0.3);
background: rgba(43,160,126,0.08); padding: 5px 12px;
border-radius: 20px; margin-bottom: 20px;
}
.l-badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--teal2); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:.3; } }
.gradient-text {
background: linear-gradient(135deg, #3DC298 0%, #2BA07E 50%, #6EE7C4 100%);
-webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.section-h2 {
font-size: clamp(32px, 5vw, 52px); font-weight: 800;
line-height: 1.15; letter-spacing: -1.5px; margin-bottom: 16px;
}
.section-sub {
font-size: 18px; color: var(--muted); line-height: 1.7; max-width: 560px;
}
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }
/* ── NAVBAR ─────────────────────────────────────────────── */
.l-nav {
position: fixed; top: 0; left: 0; right: 0; z-index: 100;
background: rgba(8,14,18,0.85); backdrop-filter: blur(16px);
border-bottom: 1px solid rgba(255,255,255,0.06);
height: 64px; display: flex; align-items: center;
}
.l-nav-inner {
max-width: 1100px; width: 100%; margin: 0 auto; padding: 0 24px;
display: flex; align-items: center; gap: 32px;
}
.l-logo {
display: flex; align-items: center; gap: 10px;
font-weight: 800; font-size: 16px; letter-spacing: -0.3px;
white-space: nowrap; flex-shrink: 0;
}
.l-logo-mark {
width: 32px; height: 32px; border-radius: 8px;
background: linear-gradient(135deg, var(--teal), var(--teal2));
display: flex; align-items: center; justify-content: center;
font-size: 11px; font-weight: 800; color: white; letter-spacing: -0.5px;
box-shadow: 0 0 20px rgba(43,160,126,0.4);
}
.l-nav-links { display: flex; gap: 6px; flex: 1; }
.l-nav-links a {
padding: 6px 14px; border-radius: 20px; font-size: 13.5px;
font-weight: 500; color: var(--muted);
transition: color 0.15s, background 0.15s;
}
.l-nav-links a:hover { color: #E2EDE8; background: rgba(255,255,255,0.06); }
.l-nav-ctas { display: flex; gap: 8px; margin-left: auto; flex-shrink: 0; }
.l-btn-ghost {
padding: 8px 18px; border-radius: 8px; font-size: 13.5px; font-weight: 600;
border: 1px solid rgba(255,255,255,0.15); color: #C2D8CF;
transition: border-color 0.15s, color 0.15s;
}
.l-btn-ghost:hover { border-color: var(--teal); color: var(--teal2); }
.l-btn-primary {
padding: 8px 20px; border-radius: 8px; font-size: 13.5px; font-weight: 700;
background: linear-gradient(135deg, var(--teal), var(--teal2));
color: white; box-shadow: 0 0 20px rgba(43,160,126,0.3);
transition: transform 0.15s, box-shadow 0.15s;
}
.l-btn-primary:hover { transform: translateY(-1px); box-shadow: 0 0 32px rgba(43,160,126,0.5); }
/* ── HERO ───────────────────────────────────────────────── */
.l-hero {
min-height: 100vh; display: flex; align-items: center;
position: relative; overflow: hidden;
padding: 120px 0 80px;
}
.l-hero-bg {
position: absolute; inset: 0; pointer-events: none; z-index: 0;
}
.hero-mesh {
position: absolute; inset: 0;
background:
radial-gradient(ellipse 70% 50% at 80% 40%, rgba(43,160,126,0.12) 0%, transparent 60%),
radial-gradient(ellipse 50% 70% at 20% 60%, rgba(43,160,126,0.06) 0%, transparent 60%),
radial-gradient(ellipse 40% 40% at 60% 80%, rgba(61,194,152,0.06) 0%, transparent 50%);
}
.hero-grid {
position: absolute; inset: 0;
background-image:
linear-gradient(rgba(43,160,126,0.04) 1px, transparent 1px),
linear-gradient(90deg, rgba(43,160,126,0.04) 1px, transparent 1px);
background-size: 48px 48px;
mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}
/* Animated SVG architecture nodes in hero */
.hero-nodes { position: absolute; inset: 0; }
.hero-nodes svg { width: 100%; height: 100%; opacity: 0.6; }
.l-hero-inner {
position: relative; z-index: 1;
max-width: 1100px; margin: 0 auto; padding: 0 24px;
display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.l-hero-text {}
.l-hero-eyebrow {
font-family: var(--mono); font-size: 11px; font-weight: 700;
letter-spacing: .2em; text-transform: uppercase; color: var(--teal2);
margin-bottom: 20px; display: flex; align-items: center; gap: 10px;
}
.l-hero-eyebrow::before {
content: ''; width: 24px; height: 1px; background: var(--teal2);
}
.l-hero-h1 {
font-size: clamp(42px, 5.5vw, 68px); font-weight: 800;
letter-spacing: -2.5px; line-height: 1.08; margin-bottom: 24px;
color: #F0F8F4;
}
.l-hero-sub {
font-size: 18px; color: var(--muted); line-height: 1.75;
margin-bottom: 36px; max-width: 500px;
}
.l-hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 48px; }
.l-btn-big-primary {
display: inline-flex; align-items: center; gap: 8px;
padding: 15px 28px; border-radius: 12px; font-size: 15px; font-weight: 700;
background: linear-gradient(135deg, var(--teal) 0%, var(--teal2) 100%);
color: white; box-shadow: var(--teal-glow);
transition: transform 0.2s var(--ease-out, cubic-bezier(0.22,1,0.36,1)), box-shadow 0.2s;
position: relative; overflow: hidden;
}
.l-btn-big-primary::after {
content: ''; position: absolute; inset: 0;
background: linear-gradient(135deg, rgba(255,255,255,0.15) 0%, transparent 60%);
pointer-events: none;
}
.l-btn-big-primary:hover { transform: translateY(-2px); box-shadow: 0 0 60px rgba(43,160,126,0.5), 0 0 120px rgba(43,160,126,0.2); }
.l-btn-big-ghost {
display: inline-flex; align-items: center; gap: 8px;
padding: 15px 24px; border-radius: 12px; font-size: 15px; font-weight: 600;
border: 1px solid rgba(255,255,255,0.15); color: #C2D8CF;
transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.l-btn-big-ghost:hover { border-color: rgba(43,160,126,0.5); color: var(--teal2); background: rgba(43,160,126,0.06); }
.l-hero-stats {
display: flex; gap: 0; flex-wrap: wrap;
border: 1px solid rgba(255,255,255,0.08); border-radius: 14px;
background: rgba(255,255,255,0.03); overflow: hidden;
}
.l-stat {
flex: 1; min-width: 80px; padding: 16px 20px; text-align: center;
border-right: 1px solid rgba(255,255,255,0.07);
}
.l-stat:last-child { border-right: none; }
.l-stat-num {
font-family: var(--mono); font-size: 26px; font-weight: 700;
color: var(--teal2); line-height: 1.1; margin-bottom: 4px;
}
.l-stat-label { font-size: 11px; color: var(--muted); font-weight: 500; }
/* Hero right: app preview card */
.l-hero-preview {
position: relative;
}
.hero-preview-card {
background: rgba(13,26,32,0.9); border: 1px solid rgba(43,160,126,0.2);
border-radius: 20px; overflow: hidden;
box-shadow: 0 40px 80px rgba(0,0,0,0.5), 0 0 0 1px rgba(43,160,126,0.1), var(--teal-glow);
}
.hpc-header {
background: rgba(255,255,255,0.04); border-bottom: 1px solid rgba(255,255,255,0.07);
padding: 12px 16px; display: flex; align-items: center; gap: 8px;
}
.hpc-dot { width: 10px; height: 10px; border-radius: 50%; }
.hpc-dots { display: flex; gap: 5px; }
.hpc-title {
flex: 1; text-align: center; font-family: var(--mono); font-size: 10px;
color: rgba(255,255,255,0.3); letter-spacing: .08em;
}
.hpc-body { padding: 20px; }
.hpc-system-tabs {
display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap;
}
.hpc-tab {
padding: 5px 12px; border-radius: 20px; font-size: 11px; font-weight: 600;
border: 1px solid rgba(255,255,255,0.1); color: rgba(255,255,255,0.4);
}
.hpc-tab.active {
background: rgba(43,160,126,0.15); border-color: rgba(43,160,126,0.4);
color: var(--teal2);
}
.hpc-metric-row {
display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; margin-bottom: 16px;
}
.hpc-metric {
background: rgba(255,255,255,0.04); border-radius: 8px; padding: 10px 12px;
border: 1px solid rgba(255,255,255,0.06);
}
.hpc-metric-val {
font-family: var(--mono); font-size: 14px; font-weight: 700;
color: #3DC298; margin-bottom: 2px;
}
.hpc-metric-lbl { font-size: 9px; color: rgba(255,255,255,0.3); text-transform: uppercase; letter-spacing: .08em; }
/* Mini arch diagram */
.hpc-arch { border-radius: 8px; overflow: hidden; background: rgba(0,0,0,0.3); padding: 16px; }
.arch-mini-svg { width: 100%; display: block; }
/* floating badge */
.hero-float-badge {
position: absolute; top: -16px; right: -16px;
background: linear-gradient(135deg, #F59E0B, #F0A020);
color: #000; font-weight: 800; font-size: 11px; font-family: var(--mono);
padding: 8px 16px; border-radius: 20px; letter-spacing: .04em;
box-shadow: 0 8px 24px rgba(245,158,11,0.4);
animation: float 3s ease-in-out infinite;
}
.hero-float-badge2 {
position: absolute; bottom: -12px; left: -12px;
background: rgba(13,26,32,0.95); color: var(--teal2);
font-size: 11px; font-family: var(--mono); font-weight: 700;
padding: 8px 14px; border-radius: 10px; letter-spacing: .04em;
border: 1px solid rgba(43,160,126,0.3);
box-shadow: 0 8px 24px rgba(0,0,0,0.4);
animation: float 3s ease-in-out infinite 1.5s;
}
@keyframes float {
0%,100% { transform: translateY(0); }
50% { transform: translateY(-8px); }
}
/* ── LOGOS ──────────────────────────────────────────────── */
.l-logos {
padding: 40px 0 60px;
border-top: 1px solid rgba(255,255,255,0.05);
border-bottom: 1px solid rgba(255,255,255,0.05);
}
.l-logos-inner {
max-width: 1100px; margin: 0 auto; padding: 0 24px;
display: flex; flex-direction: column; align-items: center; gap: 20px;
}
.l-logos-eyebrow {
font-family: var(--mono); font-size: 10px; font-weight: 700;
letter-spacing: .2em; text-transform: uppercase; color: rgba(255,255,255,0.2);
}
.l-logos-row {
display: flex; flex-wrap: wrap; gap: 8px 16px; justify-content: center;
}
.l-logo-chip {
padding: 8px 20px; border-radius: 8px; font-size: 13px; font-weight: 700;
letter-spacing: .02em; border: 1px solid rgba(255,255,255,0.08);
color: rgba(255,255,255,0.35); background: rgba(255,255,255,0.03);
transition: color 0.2s, border-color 0.2s;
}
.l-logo-chip:hover { color: rgba(255,255,255,0.7); border-color: rgba(255,255,255,0.18); }
/* ── PROBLEM ────────────────────────────────────────────── */
.l-problem { padding: 96px 0; }
.l-problem-header { text-align: center; margin-bottom: 60px; }
.l-problem-header .section-sub { margin: 0 auto; }
.l-problem-grid {
display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
margin-top: 48px;
}
.l-problem-card {
border-radius: var(--r-xl); padding: 32px 28px;
border: 1px solid;
}
.l-problem-bad {
background: rgba(217,72,72,0.04); border-color: rgba(217,72,72,0.15);
}
.l-problem-good {
background: rgba(43,160,126,0.07); border-color: rgba(43,160,126,0.25);
box-shadow: 0 0 40px rgba(43,160,126,0.1);
}
.l-problem-icon { font-size: 28px; margin-bottom: 16px; }
.l-problem-card h3 {
font-size: 17px; font-weight: 700; margin-bottom: 10px; letter-spacing: -0.3px;
}
.l-problem-bad h3 { color: rgba(255,255,255,0.5); }
.l-problem-good h3 { color: var(--teal2); }
.l-problem-card p { font-size: 14px; color: var(--muted); line-height: 1.7; }
/* ── FEATURES ────────────────────────────────────────────── */
.l-features { padding: 96px 0; background: rgba(255,255,255,0.015); }
.l-features-header { margin-bottom: 60px; }
.l-features-grid {
display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.l-feat-card {
background: var(--card); border: 1px solid var(--card-border);
border-radius: var(--r-xl); padding: 28px;
transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
position: relative; overflow: hidden;
}
.l-feat-card::before {
content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
background: linear-gradient(90deg, transparent, rgba(43,160,126,0.4), transparent);
opacity: 0; transition: opacity 0.2s;
}
.l-feat-card:hover { border-color: rgba(43,160,126,0.25); transform: translateY(-2px); box-shadow: 0 20px 40px rgba(0,0,0,0.3); }
.l-feat-card:hover::before { opacity: 1; }
.l-feat-icon {
width: 44px; height: 44px; border-radius: 12px;
background: rgba(43,160,126,0.12); border: 1px solid rgba(43,160,126,0.2);
display: flex; align-items: center; justify-content: center;
font-size: 20px; margin-bottom: 18px;
}
.l-feat-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; color: #E0EDE8; }
.l-feat-desc { font-size: 13.5px; color: var(--muted); line-height: 1.7; }
.l-feat-tag {
display: inline-block; margin-top: 14px;
font-family: var(--mono); font-size: 9px; font-weight: 700;
letter-spacing: .14em; text-transform: uppercase;
padding: 3px 10px; border-radius: 20px;
color: var(--teal); background: rgba(43,160,126,0.1); border: 1px solid rgba(43,160,126,0.2);
}
/* ── HOW IT WORKS ───────────────────────────────────────── */
.l-phases { padding: 96px 0; }
.l-phases-header { text-align: center; margin-bottom: 60px; }
.l-phases-header .section-sub { margin: 0 auto; }
.l-phases-grid {
display: grid; grid-template-columns: repeat(4, 1fr); gap: 2px;
border: 1px solid rgba(255,255,255,0.08); border-radius: var(--r-xl);
overflow: hidden;
}
.l-phase-card {
padding: 36px 28px; background: rgba(255,255,255,0.02);
border-right: 1px solid rgba(255,255,255,0.07);
position: relative;
}
.l-phase-card:last-child { border-right: none; }
.l-phase-num {
font-family: var(--mono); font-size: 48px; font-weight: 700;
color: rgba(43,160,126,0.12); line-height: 1; margin-bottom: 16px;
position: absolute; top: 20px; right: 24px;
}
.l-phase-icon { font-size: 28px; margin-bottom: 16px; }
.l-phase-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; color: #E0EDE8; }
.l-phase-desc { font-size: 13px; color: var(--muted); line-height: 1.7; }
.l-phase-time {
margin-top: 16px; font-family: var(--mono); font-size: 10px;
color: var(--teal); font-weight: 700; letter-spacing: .06em;
}
/* ── SYSTEMS ─────────────────────────────────────────────── */
.l-systems { padding: 96px 0; background: rgba(255,255,255,0.015); }
.l-systems-header { margin-bottom: 60px; }
.l-systems-grid {
display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
}
.l-sys-card {
background: var(--card); border: 1px solid var(--card-border);
border-radius: var(--r-lg); padding: 20px 18px;
display: flex; align-items: center; gap: 12px;
transition: border-color 0.2s, background 0.2s;
position: relative; overflow: hidden;
}
.l-sys-card:hover { border-color: rgba(43,160,126,0.25); background: rgba(43,160,126,0.05); }
.l-sys-card.free { border-color: rgba(43,160,126,0.2); }
.l-sys-icon { font-size: 22px; flex-shrink: 0; }
.l-sys-info { flex: 1; min-width: 0; }
.l-sys-name { font-size: 12.5px; font-weight: 700; color: #D8EDE6; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.l-sys-cat { font-size: 10px; color: var(--muted); margin-top: 2px; }
.l-sys-badge {
font-family: var(--mono); font-size: 8px; font-weight: 700;
padding: 3px 8px; border-radius: 20px; flex-shrink: 0; letter-spacing: .06em;
}
.l-sys-badge.free-badge { background: rgba(43,160,126,0.15); color: var(--teal2); border: 1px solid rgba(43,160,126,0.3); }
.l-sys-badge.pro-badge { background: rgba(124,92,246,0.12); color: #A78BFA; border: 1px solid rgba(124,92,246,0.25); }
.l-systems-note {
margin-top: 24px; text-align: center; font-size: 13px; color: var(--muted);
}
.l-systems-note a { color: var(--teal2); font-weight: 600; }
/* ── TESTIMONIALS ────────────────────────────────────────── */
.l-testimonials { padding: 96px 0; }
.l-testimonials-header { text-align: center; margin-bottom: 60px; }
.l-testimonials-header .section-sub { margin: 0 auto; }
.l-t-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.l-t-card {
background: var(--card); border: 1px solid var(--card-border);
border-radius: var(--r-xl); padding: 28px;
position: relative;
}
.l-t-card::before {
content: '"'; position: absolute; top: 16px; left: 24px;
font-size: 64px; line-height: 1; color: rgba(43,160,126,0.15);
font-family: Georgia, serif;
}
.l-t-quote { font-size: 14.5px; line-height: 1.75; color: #C0D4CC; margin-bottom: 24px; padding-top: 24px; }
.l-t-author { display: flex; align-items: center; gap: 12px; }
.l-t-avatar {
width: 38px; height: 38px; border-radius: 50%;
display: flex; align-items: center; justify-content: center;
font-size: 15px; font-weight: 800; color: white; flex-shrink: 0;
}
.l-t-name { font-size: 13px; font-weight: 700; color: #E0EDE8; }
.l-t-role { font-size: 11px; color: var(--muted); }
.l-t-company {
margin-left: auto; font-family: var(--mono); font-size: 10px;
font-weight: 700; padding: 3px 10px; border-radius: 20px;
}
/* ── PRICING ─────────────────────────────────────────────── */
/* ── FAQ ─────────────────────────────────────────────────── */
.l-faq { padding: 96px 0; }
.l-faq-header { text-align: center; margin-bottom: 60px; }
.l-faq-list { max-width: 700px; margin: 0 auto; display: flex; flex-direction: column; gap: 2px; }
.l-faq-item {
border: 1px solid rgba(255,255,255,0.07); border-radius: 12px; overflow: hidden;
background: rgba(255,255,255,0.02);
}
.l-faq-q {
width: 100%; padding: 20px 24px; text-align: left;
background: none; border: none; cursor: pointer; color: #E0EDE8;
font-size: 15px; font-weight: 600; font-family: inherit;
display: flex; justify-content: space-between; align-items: center; gap: 16px;
transition: background 0.15s;
}
.l-faq-q:hover { background: rgba(255,255,255,0.04); }
.l-faq-q .l-faq-icon { font-size: 18px; color: var(--teal); flex-shrink: 0; transition: transform 0.2s; }
.l-faq-a {
max-height: 0; overflow: hidden; transition: max-height 0.3s ease, padding 0.3s ease;
font-size: 14px; color: var(--muted); line-height: 1.8; padding: 0 24px;
}
.l-faq-item.open .l-faq-a { max-height: 200px; padding: 0 24px 20px; }
.l-faq-item.open .l-faq-icon { transform: rotate(45deg); }
/* ── FOOTER CTA ──────────────────────────────────────────── */
.l-footer-cta {
padding: 96px 0; text-align: center;
background: linear-gradient(180deg, transparent 0%, rgba(43,160,126,0.06) 50%, transparent 100%);
}
.l-footer-cta .section-h2 { margin-bottom: 20px; }
.l-footer-cta .section-sub { margin: 0 auto 40px; }
.l-footer-cta-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
/* ── FOOTER ──────────────────────────────────────────────── */
.l-footer {
border-top: 1px solid rgba(255,255,255,0.06); padding: 40px 0;
}
.l-footer-inner {
max-width: 1100px; margin: 0 auto; padding: 0 24px;
display: flex; align-items: center; justify-content: space-between; flex-wrap: gap;
gap: 16px;
}
.l-footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 14px; }
.l-footer-mark {
width: 26px; height: 26px; border-radius: 6px;
background: linear-gradient(135deg, var(--teal), var(--teal2));
display: flex; align-items: center; justify-content: center;
font-size: 9px; font-weight: 800; color: white;
}
.l-footer-links { display: flex; gap: 20px; }
.l-footer-links a { font-size: 13px; color: var(--muted); transition: color 0.15s; }
.l-footer-links a:hover { color: var(--teal2); }
.l-footer-copy { font-size: 12px; color: rgba(255,255,255,0.2); }
/* ── AUTH MODAL ──────────────────────────────────────────── */
.l-auth-overlay {
position: fixed; inset: 0; z-index: 500;
background: rgba(0,0,0,0.75); backdrop-filter: blur(8px);
display: flex; align-items: center; justify-content: center; padding: 24px;
opacity: 0; pointer-events: none; transition: opacity 0.2s;
}
.l-auth-overlay.open { opacity: 1; pointer-events: auto; }
.l-auth-modal {
background: #0D1A20; border: 1px solid rgba(43,160,126,0.25);
border-radius: 24px; padding: 40px; width: 100%; max-width: 440px;
position: relative; box-shadow: 0 40px 80px rgba(0,0,0,0.6);
transform: scale(0.95) translateY(10px); transition: transform 0.2s;
}
.l-auth-overlay.open .l-auth-modal { transform: scale(1) translateY(0); }
.l-auth-close {
position: absolute; top: 16px; right: 16px; background: none; border: none;
color: var(--muted); font-size: 20px; cursor: pointer; width: 32px; height: 32px;
border-radius: 8px; display: flex; align-items: center; justify-content: center;
transition: background 0.15s;
}
.l-auth-close:hover { background: rgba(255,255,255,0.08); }
.l-auth-logo { text-align: center; margin-bottom: 24px; }
.l-auth-logo .l-logo-mark { margin: 0 auto 12px; }
.l-auth-title { font-size: 22px; font-weight: 800; text-align: center; margin-bottom: 6px; color: #F0F8F4; }
.l-auth-sub { font-size: 13px; color: var(--muted); text-align: center; margin-bottom: 28px; }
.l-auth-tabs { display: flex; gap: 2px; background: rgba(255,255,255,0.05); border-radius: 10px; padding: 3px; margin-bottom: 24px; }
.l-auth-tab {
flex: 1; padding: 8px; border-radius: 8px; font-size: 13px; font-weight: 600;
cursor: pointer; border: none; background: none; color: var(--muted); font-family: inherit;
transition: background 0.15s, color 0.15s;
}
.l-auth-tab.active { background: rgba(43,160,126,0.15); color: var(--teal2); }
.l-auth-field { margin-bottom: 14px; }
.l-auth-field label { display: block; font-size: 12px; font-weight: 600; color: var(--muted); margin-bottom: 6px; letter-spacing: .04em; text-transform: uppercase; }
.l-auth-field input {
width: 100%; padding: 12px 16px; border-radius: 10px;
background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
color: #E0EDE8; font-size: 14px; font-family: inherit;
outline: none; transition: border-color 0.15s, box-shadow 0.15s;
}
.l-auth-field input:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(43,160,126,0.15); }
.l-auth-field input::placeholder { color: rgba(255,255,255,0.2); }
.l-auth-submit {
width: 100%; padding: 14px; border-radius: 12px; font-size: 15px; font-weight: 700;
background: linear-gradient(135deg, var(--teal), var(--teal2));
color: white; border: none; cursor: pointer; font-family: inherit; margin-top: 8px;
transition: opacity 0.2s, transform 0.2s;
}
.l-auth-submit:hover { opacity: 0.9; transform: translateY(-1px); }
.l-auth-divider {
display: flex; align-items: center; gap: 12px;
margin: 16px 0; font-size: 12px; color: rgba(255,255,255,0.2);
}
.l-auth-divider::before, .l-auth-divider::after {
content: ''; flex: 1; height: 1px; background: rgba(255,255,255,0.08);
}
.l-auth-google {
width: 100%; padding: 12px; border-radius: 12px; font-size: 14px; font-weight: 600;
background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12);
color: #D0E0DB; cursor: pointer; font-family: inherit;
display: flex; align-items: center; justify-content: center; gap: 10px;
transition: background 0.15s, border-color 0.15s;
}
.l-auth-google:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.2); }
.l-auth-error {
background: rgba(217,72,72,0.1); border: 1px solid rgba(217,72,72,0.25);
color: #F07070; border-radius: 8px; padding: 10px 14px;
font-size: 13px; margin-bottom: 14px; display: none;
}
.l-auth-error.show { display: block; }
.l-auth-success {
text-align: center; padding: 20px 0;
display: none;
}
.l-auth-success.show { display: block; }
.l-auth-success-icon { font-size: 48px; margin-bottom: 12px; }
.l-auth-success h3 { font-size: 20px; font-weight: 800; color: var(--teal2); margin-bottom: 8px; }
.l-auth-success p { font-size: 13px; color: var(--muted); }
/* ── RESPONSIVE ──────────────────────────────────────────── */
@media (max-width: 900px) {
.l-hero-inner { grid-template-columns: 1fr; }
.l-hero-preview { display: none; }
.l-problem-grid { grid-template-columns: 1fr; }
.l-features-grid { grid-template-columns: 1fr 1fr; }
.l-phases-grid { grid-template-columns: 1fr 1fr; }
.l-systems-grid { grid-template-columns: 1fr 1fr; }
.l-t-grid { grid-template-columns: 1fr; }
.l-nav-links { display: none; }
}
@media (max-width: 600px) {
.l-features-grid { grid-template-columns: 1fr; }
.l-phases-grid { grid-template-columns: 1fr; }
.l-systems-grid { grid-template-columns: 1fr 1fr; }
.l-hero-stats { flex-direction: column; }
.l-stat { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.07); }
.l-stat:last-child { border-bottom: none; }
}
@media (prefers-reduced-motion: reduce) {
*, *::before, *::after { animation: none !important; transition-duration: 0.01ms !important; }
}
</style>
</head>
<body>
<!-- ── NAVBAR ──────────────────────────────────────────────── -->
<nav class="l-nav">
<div class="l-nav-inner">
<a href="landing.html" class="l-logo">
<div class="l-logo-mark">SS</div>SysScale
</a>
<div class="l-nav-links">
<a href="#features">Features</a>
<a href="#systems">Systems</a>
<a href="#faq">FAQ</a>
</div>
<div class="l-nav-ctas" id="nav-ctas">
<a href="login.html" class="l-btn-ghost">Sign In</a>
<a href="login.html" class="l-btn-primary">Get Started Free →</a>
</div>
</div>
</nav>
<!-- ── HERO ────────────────────────────────────────────────── -->
<section class="l-hero">
<div class="l-hero-bg">
<div class="hero-mesh"></div>
<div class="hero-grid"></div>
<div class="hero-nodes">
<svg viewBox="0 0 800 600" preserveAspectRatio="xMidYMid slice" xmlns="http://www.w3.org/2000/svg">
<defs>
<filter id="glow"><feGaussianBlur stdDeviation="3" result="blur"/><feMerge><feMergeNode in="blur"/><feMergeNode in="SourceGraphic"/></feMerge></filter>
</defs>
<!-- Connection lines -->
<line x1="500" y1="140" x2="620" y2="220" stroke="rgba(43,160,126,0.2)" stroke-width="1.5">
<animate attributeName="stroke-opacity" values="0.2;0.5;0.2" dur="3s" repeatCount="indefinite"/>
</line>
<line x1="620" y1="220" x2="700" y2="360" stroke="rgba(43,160,126,0.2)" stroke-width="1.5">
<animate attributeName="stroke-opacity" values="0.2;0.4;0.2" dur="4s" repeatCount="indefinite" begin="0.5s"/>
</line>
<line x1="500" y1="140" x2="380" y2="260" stroke="rgba(43,160,126,0.15)" stroke-width="1.5">
<animate attributeName="stroke-opacity" values="0.15;0.4;0.15" dur="3.5s" repeatCount="indefinite" begin="1s"/>
</line>
<line x1="620" y1="220" x2="500" y2="340" stroke="rgba(43,160,126,0.15)" stroke-width="1.5">
<animate attributeName="stroke-opacity" values="0.15;0.35;0.15" dur="5s" repeatCount="indefinite"/>
</line>
<line x1="700" y1="360" x2="560" y2="460" stroke="rgba(43,160,126,0.1)" stroke-width="1.5">
<animate attributeName="stroke-opacity" values="0.1;0.3;0.1" dur="4s" repeatCount="indefinite" begin="2s"/>
</line>
<line x1="380" y1="260" x2="500" y2="340" stroke="rgba(43,160,126,0.12)" stroke-width="1.5">
<animate attributeName="stroke-opacity" values="0.12;0.3;0.12" dur="3.8s" repeatCount="indefinite" begin="0.8s"/>
</line>
<!-- Data flow dots on lines -->
<circle r="3" fill="rgba(61,194,152,0.8)" filter="url(#glow)">
<animateMotion dur="3s" repeatCount="indefinite" path="M500,140 L620,220"/>
</circle>
<circle r="3" fill="rgba(61,194,152,0.6)" filter="url(#glow)">
<animateMotion dur="4s" repeatCount="indefinite" begin="1s" path="M620,220 L700,360"/>
</circle>
<circle r="2.5" fill="rgba(61,194,152,0.5)" filter="url(#glow)">
<animateMotion dur="3.5s" repeatCount="indefinite" begin="2s" path="M500,140 L380,260 L500,340"/>
</circle>
<!-- Nodes -->
<g filter="url(#glow)">
<!-- Client -->
<rect x="456" y="110" width="88" height="60" rx="10" fill="rgba(43,160,126,0.12)" stroke="rgba(43,160,126,0.5)" stroke-width="1.5"/>
<text x="500" y="138" text-anchor="middle" font-size="10" fill="rgba(255,255,255,0.8)" font-family="JetBrains Mono,monospace" font-weight="700">CLIENT</text>
<text x="500" y="153" text-anchor="middle" font-size="9" fill="rgba(43,160,126,0.8)" font-family="JetBrains Mono,monospace">100K RPS</text>
<!-- API Gateway -->
<rect x="574" y="192" width="92" height="56" rx="10" fill="rgba(43,160,126,0.1)" stroke="rgba(43,160,126,0.4)" stroke-width="1.5"/>
<text x="620" y="218" text-anchor="middle" font-size="9" fill="rgba(255,255,255,0.7)" font-family="JetBrains Mono,monospace" font-weight="700">API GW</text>
<text x="620" y="232" text-anchor="middle" font-size="8" fill="rgba(43,160,126,0.7)" font-family="JetBrains Mono,monospace">+ Rate Limit</text>
<!-- DB -->
<rect x="656" y="334" width="88" height="52" rx="10" fill="rgba(43,160,126,0.08)" stroke="rgba(43,160,126,0.3)" stroke-width="1.5"/>
<text x="700" y="358" text-anchor="middle" font-size="9" fill="rgba(255,255,255,0.6)" font-family="JetBrains Mono,monospace" font-weight="700">CASSANDRA</text>
<text x="700" y="372" text-anchor="middle" font-size="8" fill="rgba(43,160,126,0.6)" font-family="JetBrains Mono,monospace">RF=3</text>
<!-- Cache -->
<rect x="336" y="232" width="88" height="52" rx="10" fill="rgba(61,194,152,0.1)" stroke="rgba(61,194,152,0.35)" stroke-width="1.5"/>
<text x="380" y="256" text-anchor="middle" font-size="9" fill="rgba(255,255,255,0.65)" font-family="JetBrains Mono,monospace" font-weight="700">REDIS</text>
<text x="380" y="270" text-anchor="middle" font-size="8" fill="rgba(61,194,152,0.7)" font-family="JetBrains Mono,monospace"><1ms P99</text>
<!-- Service -->
<rect x="456" y="314" width="88" height="52" rx="10" fill="rgba(43,160,126,0.09)" stroke="rgba(43,160,126,0.35)" stroke-width="1.5"/>
<text x="500" y="338" text-anchor="middle" font-size="9" fill="rgba(255,255,255,0.65)" font-family="JetBrains Mono,monospace" font-weight="700">SERVICE</text>
<text x="500" y="352" text-anchor="middle" font-size="8" fill="rgba(43,160,126,0.6)" font-family="JetBrains Mono,monospace">3 replicas</text>
<!-- Queue -->
<rect x="516" y="432" width="88" height="52" rx="10" fill="rgba(43,160,126,0.07)" stroke="rgba(43,160,126,0.25)" stroke-width="1.5"/>
<text x="560" y="456" text-anchor="middle" font-size="9" fill="rgba(255,255,255,0.5)" font-family="JetBrains Mono,monospace" font-weight="700">KAFKA</text>
<text x="560" y="470" text-anchor="middle" font-size="8" fill="rgba(43,160,126,0.5)" font-family="JetBrains Mono,monospace">1M msg/s</text>
</g>
</svg>
</div>
</div>
<div class="l-hero-inner">
<div class="l-hero-text">
<div class="l-hero-eyebrow">System Design Interview Prep</div>
<h1 class="l-hero-h1">
Outdesign every<br>candidate <span class="gradient-text">in the room.</span>
</h1>
<p class="l-hero-sub">
16 interactive systems with real capacity math, live architecture diagrams, and reasoning cards that explain <em>why</em> — not just what. Built by engineers who cleared FAANG.
</p>
<div class="l-hero-ctas">
<a href="login.html" class="l-btn-big-primary">Get Started Free →</a>
<a href="estimator.html" class="l-btn-big-ghost">Try free systems →</a>
</div>
<div class="l-hero-stats">
<div class="l-stat">
<div class="l-stat-num" data-target="16">0</div>
<div class="l-stat-label">Systems</div>
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<div class="l-stat">
<div class="l-stat-num" data-target="4">0</div>
<div class="l-stat-label">Phases</div>
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<div class="l-stat">
<div class="l-stat-num" data-target="48">0</div>
<div class="l-stat-label">Design Decisions</div>
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<div class="l-stat">
<div class="l-stat-num" data-target="35">0</div>
<div class="l-stat-label">Min Mock Timer</div>
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<div class="l-hero-preview">
<div class="hero-float-badge">⚡ 48 reasoning cards</div>
<div class="hero-preview-card">
<div class="hpc-header">
<div class="hpc-dots">
<div class="hpc-dot" style="background:#FF5F57"></div>
<div class="hpc-dot" style="background:#FEBC2E"></div>
<div class="hpc-dot" style="background:#28C840"></div>
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<div class="hpc-title">sysscale.io/estimator</div>
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<div class="hpc-body">
<div class="hpc-system-tabs">
<div class="hpc-tab active">Rate Limiter</div>
<div class="hpc-tab">Chat Service</div>
<div class="hpc-tab">News Feed</div>
<div class="hpc-tab" style="color:rgba(255,255,255,0.2)">+13 more</div>
</div>
<div class="hpc-metric-row">
<div class="hpc-metric">
<div class="hpc-metric-val">5.8K</div>
<div class="hpc-metric-lbl">Avg RPS</div>
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<div class="hpc-metric">
<div class="hpc-metric-val">29K</div>
<div class="hpc-metric-lbl">Peak RPS</div>
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<div class="hpc-metric">
<div class="hpc-metric-val">~2 GB</div>
<div class="hpc-metric-lbl">Redis RAM</div>
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<div class="hpc-arch">
<svg class="arch-mini-svg" viewBox="0 0 320 120" xmlns="http://www.w3.org/2000/svg">
<rect x="10" y="44" width="64" height="32" rx="6" fill="rgba(43,160,126,0.15)" stroke="rgba(43,160,126,0.4)" stroke-width="1"/>
<text x="42" y="61" text-anchor="middle" font-size="7" fill="rgba(255,255,255,0.7)" font-family="monospace" font-weight="700">CLIENT</text>
<line x1="74" y1="60" x2="100" y2="60" stroke="rgba(43,160,126,0.5)" stroke-width="1.5" marker-end="url(#a)"/>
<rect x="100" y="44" width="66" height="32" rx="6" fill="rgba(43,160,126,0.12)" stroke="rgba(43,160,126,0.35)" stroke-width="1"/>
<text x="133" y="61" text-anchor="middle" font-size="7" fill="rgba(255,255,255,0.65)" font-family="monospace" font-weight="700">API GW</text>
<line x1="166" y1="60" x2="192" y2="60" stroke="rgba(43,160,126,0.4)" stroke-width="1.5"/>
<rect x="192" y="44" width="66" height="32" rx="6" fill="rgba(61,194,152,0.12)" stroke="rgba(61,194,152,0.4)" stroke-width="1"/>
<text x="225" y="58" text-anchor="middle" font-size="7" fill="rgba(255,255,255,0.7)" font-family="monospace" font-weight="700">RATE</text>
<text x="225" y="68" text-anchor="middle" font-size="7" fill="rgba(255,255,255,0.7)" font-family="monospace" font-weight="700">LIMITER</text>
<line x1="258" y1="60" x2="284" y2="60" stroke="rgba(43,160,126,0.4)" stroke-width="1.5"/>
<rect x="284" y="44" width="30" height="32" rx="6" fill="rgba(43,160,126,0.08)" stroke="rgba(43,160,126,0.25)" stroke-width="1"/>
<text x="299" y="61" text-anchor="middle" font-size="7" fill="rgba(43,160,126,0.7)" font-family="monospace" font-weight="700">DB</text>
<!-- Redis below rate limiter -->
<line x1="225" y1="76" x2="225" y2="96" stroke="rgba(61,194,152,0.4)" stroke-width="1"/>
<rect x="192" y="96" width="66" height="20" rx="4" fill="rgba(61,194,152,0.08)" stroke="rgba(61,194,152,0.3)" stroke-width="1"/>
<text x="225" y="109" text-anchor="middle" font-size="7" fill="rgba(61,194,152,0.7)" font-family="monospace" font-weight="700">REDIS · <1ms</text>
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<div class="hero-float-badge2">✓ Token bucket chosen — 250× less memory</div>
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</section>
<!-- ── LOGOS ────────────────────────────────────────────────── -->
<section class="l-logos">
<div class="l-logos-inner">
<div class="l-logos-eyebrow">Engineers prepping for interviews at</div>
<div class="l-logos-row">
<span class="l-logo-chip">Google</span>
<span class="l-logo-chip">Meta</span>
<span class="l-logo-chip">Amazon</span>
<span class="l-logo-chip">Netflix</span>
<span class="l-logo-chip">Apple</span>
<span class="l-logo-chip">Uber</span>
<span class="l-logo-chip">Microsoft</span>
<span class="l-logo-chip">Stripe</span>
<span class="l-logo-chip">Airbnb</span>
<span class="l-logo-chip">LinkedIn</span>
</div>
</div>
</section>
<!-- ── THE PROBLEM ───────────────────────────────────────────── -->
<section class="l-problem">
<div class="l-inner">
<div class="l-problem-header reveal">
<div class="l-badge">The Problem</div>
<h2 class="section-h2">Other tools show you <em>what</em>.<br>We show you <span class="gradient-text">why.</span></h2>
<p class="section-sub">Memorizing architecture diagrams gets you to the whiteboard. Reasoning about tradeoffs gets you the offer.</p>
</div>
<div class="l-problem-grid reveal">
<div class="l-problem-card l-problem-bad">
<div class="l-problem-icon">📒</div>
<h3>Static diagrams</h3>
<p>Memorize 50 architecture diagrams and hope the interviewer asks the one you've seen before. They never do.</p>
</div>
<div class="l-problem-card l-problem-bad">
<div class="l-problem-icon">🧮</div>
<h3>No estimation math</h3>
<p>Fumble through napkin math live. "86,400 seconds in a day... um, × daily active users... so that's... uh..."</p>
</div>
<div class="l-problem-card l-problem-good">
<div class="l-problem-icon">⚡</div>
<h3>SysScale: live reasoning</h3>
<p>Tune sliders, watch real math update live. Read structured cards that explain every tradeoff with numbers — and practice saying it out loud.</p>
</div>
</div>
</div>
</section>
<!-- ── FEATURES ──────────────────────────────────────────────── -->
<section class="l-features l-section" id="features">
<div class="l-inner">
<div class="l-features-header reveal">
<div class="l-badge">Features</div>
<h2 class="section-h2">Everything you need.<br>Nothing you don't.</h2>
</div>
<div class="l-features-grid reveal">
<div class="l-feat-card">
<div class="l-feat-icon">⚡</div>
<div class="l-feat-title">Live Capacity Estimator</div>
<div class="l-feat-desc">Sliders for DAU, read/write ratio, payload size. Watch RPS, storage, bandwidth, and node counts recalculate in real time.</div>
<div class="l-feat-tag">Instant math</div>
</div>
<div class="l-feat-card">
<div class="l-feat-icon">🏗️</div>
<div class="l-feat-title">Architecture Diagrams</div>
<div class="l-feat-desc">Live SVG diagrams that update with your parameters. Bottleneck nodes pulse red. See the system change as you tune the knobs.</div>
<div class="l-feat-tag">Dynamically generated</div>
</div>
<div class="l-feat-card">
<div class="l-feat-icon">🧠</div>
<div class="l-feat-title">Reasoning Cards</div>
<div class="l-feat-desc">Every design decision shown as Problem → Options → Chosen approach with rationale. Exactly what interviewers want to hear.</div>
<div class="l-feat-tag">48 decisions</div>
</div>
<div class="l-feat-card">
<div class="l-feat-icon">🎯</div>
<div class="l-feat-title">4-Phase Interview Flow</div>
<div class="l-feat-desc">Requirements → Capacity → Architecture → Deep Dive. The exact framework used at every major tech company interview.</div>
<div class="l-feat-tag">FAANG-proven</div>
</div>
<div class="l-feat-card">
<div class="l-feat-icon">⏱️</div>
<div class="l-feat-title">35-Min Practice Timer</div>
<div class="l-feat-desc">Timed mock sessions with coaching prompts at the right moments. Know exactly when to move on from requirements to design.</div>
<div class="l-feat-tag">With live prompts</div>
</div>
<div class="l-feat-card">
<div class="l-feat-icon">📖</div>
<div class="l-feat-title">Failure Mode Chains</div>
<div class="l-feat-desc">Every system's failure modes shown as Scenario → Impact → Mitigation → Recovery. The deep-dive questions that separate seniors from juniors.</div>
<div class="l-feat-tag">48 failure modes</div>
</div>
</div>
</div>
</section>
<!-- ── HOW IT WORKS ───────────────────────────────────────────── -->
<section class="l-phases l-section">
<div class="l-inner">
<div class="l-phases-header reveal">
<div class="l-badge">The Framework</div>
<h2 class="section-h2">4 phases.<br>Every interview.</h2>
<p class="section-sub">The same structure used at Google, Meta, Amazon, and every major tech interview. Practice it until it's automatic.</p>
</div>
<div class="l-phases-grid reveal">
<div class="l-phase-card">
<div class="l-phase-num">1</div>
<div class="l-phase-icon">📋</div>
<div class="l-phase-title">Requirements</div>
<div class="l-phase-desc">Clarify functional + non-functional requirements. State your assumptions. Define what's out of scope. Never skip this.</div>
<div class="l-phase-time">0–5 min</div>
</div>
<div class="l-phase-card">
<div class="l-phase-num">2</div>
<div class="l-phase-icon">🔢</div>
<div class="l-phase-title">Capacity</div>
<div class="l-phase-desc">Traffic → storage → bandwidth → node count. Show your math. Say real numbers. This is where most candidates lose points.</div>
<div class="l-phase-time">5–10 min</div>
</div>
<div class="l-phase-card">
<div class="l-phase-num">3</div>
<div class="l-phase-icon">🏗️</div>
<div class="l-phase-title">Architecture</div>
<div class="l-phase-desc">Draw the components, justify your data stores, explain the write and read paths. Name the tradeoffs you're accepting.</div>
<div class="l-phase-time">10–25 min</div>
</div>
<div class="l-phase-card">
<div class="l-phase-num">4</div>
<div class="l-phase-icon">🔍</div>
<div class="l-phase-title">Deep Dive</div>
<div class="l-phase-desc">Design decisions with options. Failure modes with mitigations. This is the phase that separates seniors from everyone else.</div>
<div class="l-phase-time">25–35 min</div>
</div>
</div>
</div>
</section>
<!-- ── SYSTEMS ────────────────────────────────────────────────── -->
<section class="l-systems l-section" id="systems">
<div class="l-inner">
<div class="l-systems-header reveal">
<div class="l-badge">16 Systems</div>
<h2 class="section-h2">Every system design<br>question that matters.</h2>
<p class="section-sub">Handpicked from real FAANG interview reports. All 16 systems, free to use.</p>
</div>
<div class="l-systems-grid reveal">
<div class="l-sys-card free">
<div class="l-sys-icon">🚦</div>
<div class="l-sys-info"><div class="l-sys-name">Rate Limiter</div><div class="l-sys-cat">Infrastructure</div></div>
<div class="l-sys-badge free-badge">FREE</div>
</div>
<div class="l-sys-card free">
<div class="l-sys-icon">🔗</div>
<div class="l-sys-info"><div class="l-sys-name">URL Shortener</div><div class="l-sys-cat">Storage / Cache</div></div>
<div class="l-sys-badge free-badge">FREE</div>
</div>
<div class="l-sys-card free">
<div class="l-sys-icon">⚡</div>
<div class="l-sys-info"><div class="l-sys-name">Distributed Cache</div><div class="l-sys-cat">Caching</div></div>
<div class="l-sys-badge free-badge">FREE</div>
</div>
<div class="l-sys-card free">
<div class="l-sys-icon">📨</div>
<div class="l-sys-info"><div class="l-sys-name">Message Queue</div><div class="l-sys-cat">Messaging</div></div>
<div class="l-sys-badge free-badge">FREE</div>
</div>
<div class="l-sys-card">
<div class="l-sys-icon">💬</div>
<div class="l-sys-info"><div class="l-sys-name">Chat Service</div><div class="l-sys-cat">Real-time</div></div>
<div class="l-sys-badge pro-badge">PRO</div>
</div>
<div class="l-sys-card">
<div class="l-sys-icon">🔔</div>
<div class="l-sys-info"><div class="l-sys-name">Notifications</div><div class="l-sys-cat">Fan-out</div></div>
<div class="l-sys-badge pro-badge">PRO</div>
</div>
<div class="l-sys-card">
<div class="l-sys-icon">🔍</div>
<div class="l-sys-info"><div class="l-sys-name">Typeahead Search</div><div class="l-sys-cat">Search</div></div>
<div class="l-sys-badge pro-badge">PRO</div>
</div>
<div class="l-sys-card">
<div class="l-sys-icon">📹</div>
<div class="l-sys-info"><div class="l-sys-name">Video Calls (Zoom)</div><div class="l-sys-cat">Real-time Media</div></div>
<div class="l-sys-badge pro-badge">PRO</div>
</div>
<div class="l-sys-card">
<div class="l-sys-icon">📰</div>
<div class="l-sys-info"><div class="l-sys-name">News Feed</div><div class="l-sys-cat">Fan-out</div></div>
<div class="l-sys-badge pro-badge">PRO</div>
</div>
<div class="l-sys-card">
<div class="l-sys-icon">🚗</div>
<div class="l-sys-info"><div class="l-sys-name">Ride Sharing</div><div class="l-sys-cat">Geo / Matching</div></div>
<div class="l-sys-badge pro-badge">PRO</div>
</div>
<div class="l-sys-card">
<div class="l-sys-icon">⏰</div>
<div class="l-sys-info"><div class="l-sys-name">Job Scheduler</div><div class="l-sys-cat">Distributed</div></div>
<div class="l-sys-badge pro-badge">PRO</div>
</div>
<div class="l-sys-card">
<div class="l-sys-icon">🕷️</div>
<div class="l-sys-info"><div class="l-sys-name">Web Crawler</div><div class="l-sys-cat">Large Scale</div></div>
<div class="l-sys-badge pro-badge">PRO</div>
</div>
<div class="l-sys-card">
<div class="l-sys-icon">🗄️</div>
<div class="l-sys-info"><div class="l-sys-name">Object Storage</div><div class="l-sys-cat">Storage</div></div>
<div class="l-sys-badge pro-badge">PRO</div>