@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Space+Mono:ital,wght@0,400;0,700;1,400&display=swap');

:root {
    --bg-primary: #F4F4F0;
    --bg-secondary: #EBEBE6;
    --bg-dark: #1A1A1A;
    --color-text: #222222;
    --accent-red: #D9381E;
    --accent-yellow: #F9A825;
    --accent-green: #2E7D32;
    --font-mono: 'Space Mono', monospace;
    --font-sans: 'Inter', sans-serif;
    --border-thick: 3px solid var(--bg-dark);
    --border-thin: 1px solid #CCC;
    --grid-pattern: radial-gradient(#d1d1d1 1px, transparent 1px);
    --grid-size: 20px 20px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-sans); background-color: var(--bg-primary); color: var(--color-text); line-height: 1.6; overflow-x: hidden; }

h1, h2, h3, h4, h5, h6 { font-family: var(--font-mono); text-transform: uppercase; color: var(--bg-dark); line-height: 1.1; margin-bottom: 1rem; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); border-bottom: var(--border-thick); display: inline-block; padding-bottom: 0.5rem; margin-bottom: 2rem; }
h3 { font-size: 1.5rem; }
p { margin-bottom: 1.5rem; font-size: 1.125rem; }
ul, ol { margin-bottom: 1.5rem; padding-left: 2rem; font-size: 1.125rem; }
li { margin-bottom: 0.5rem; }

.mono-tag { font-family: var(--font-mono); font-size: 0.85rem; background: var(--bg-dark); color: var(--bg-primary); padding: 0.2rem 0.5rem; display: inline-block; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 1rem; }
.mono-tag.red { background: var(--accent-red); }
.mono-tag.yellow { background: var(--accent-yellow); color: var(--bg-dark); }
.mono-tag.green { background: var(--accent-green); }

.container { width: 100%; max-width: 1400px; margin: 0 auto; padding: 0 5%; }
section { padding: 6rem 0; position: relative; border-bottom: var(--border-thin); }
section.blueprint { background-color: var(--bg-secondary); background-image: var(--grid-pattern); background-size: var(--grid-size); }
section.dark-mode { background-color: var(--bg-dark); color: var(--bg-primary); }
section.dark-mode h2, section.dark-mode h3, section.dark-mode p, section.dark-mode li { color: var(--bg-primary); border-color: var(--bg-primary); }

.grid { display: grid; gap: 3rem; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

.kanban-card { background: var(--bg-primary); border: var(--border-thick); padding: 2rem; position: relative; transition: transform 0.3s ease, box-shadow 0.3s ease; }
.kanban-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 5px; background: var(--bg-dark); }
.kanban-card.red-top::before { background: var(--accent-red); }
.kanban-card.green-top::before { background: var(--accent-green); }
.kanban-card.yellow-top::before { background: var(--accent-yellow); }
.kanban-card:hover { transform: translateY(-5px); box-shadow: 10px 10px 0px rgba(0,0,0,1); }
section.dark-mode .kanban-card { background: var(--bg-dark); border-color: var(--bg-primary); color: var(--bg-primary); }

.system-header { background: var(--bg-primary); border-bottom: var(--border-thick); padding: 1rem 5%; display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 100; }
.logo { font-family: var(--font-mono); font-size: 1.5rem; font-weight: 700; color: var(--bg-dark); text-decoration: none; text-transform: uppercase; display: flex; align-items: center; gap: 0.5rem; }
.status-dot { width: 12px; height: 12px; background: var(--accent-green); border-radius: 50%; display: inline-block; animation: blink 2s infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

.main-nav { display: flex; gap: 2rem; }
.main-nav a { font-family: var(--font-mono); color: var(--bg-dark); text-decoration: none; font-weight: 700; text-transform: uppercase; font-size: 0.9rem; padding: 0.5rem 0; position: relative; }
.main-nav a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--accent-red); transition: width 0.3s ease; }
.main-nav a:hover::after, .main-nav a.active::after { width: 100%; }

.menu-toggle { display: none; font-family: var(--font-mono); background: var(--bg-dark); color: var(--bg-primary); border: none; padding: 0.8rem 1.5rem; font-size: 1.1rem; cursor: pointer; font-weight: bold; text-transform: uppercase; }

.system-footer { background: var(--bg-dark); color: var(--bg-primary); padding: 4rem 5%; border-top: 5px solid var(--accent-red); font-family: var(--font-mono); }
.system-footer h4 { color: var(--bg-primary); border-bottom: 1px solid #444; margin-bottom: 1rem; padding-bottom: 0.5rem; }
.system-footer a { color: #999; text-decoration: none; transition: color 0.3s; }
.system-footer a:hover { color: var(--accent-red); }
.system-footer ul { list-style: none; padding: 0; }
.system-footer li { margin-bottom: 0.5rem; font-size: 0.9rem; }

.btn-primary { display: inline-flex; align-items: center; gap: 1rem; background: var(--accent-red); color: #fff; font-family: var(--font-mono); text-transform: uppercase; font-weight: bold; text-decoration: none; padding: 1rem 2rem; border: var(--border-thick); border-color: var(--bg-dark); transition: all 0.2s; cursor: pointer; }
.btn-primary:hover { background: var(--bg-dark); color: var(--bg-primary); }

.img-industrial { width: 100%; height: auto; border: var(--border-thick); filter: grayscale(100%) contrast(1.2); transition: filter 0.5s ease; object-fit: cover; }
.img-industrial:hover { filter: grayscale(0%) contrast(1); }

.metrics-panel { display: flex; flex-wrap: wrap; gap: 2rem; background: var(--bg-dark); padding: 3rem; color: #fff; margin-top: 2rem; border-left: 5px solid var(--accent-red); }
.metric { flex: 1; min-width: 150px; }
.metric-val { font-family: var(--font-mono); font-size: 3.5rem; font-weight: 700; line-height: 1; color: var(--accent-red); margin-bottom: 0.5rem;}
.metric-label { font-size: 1rem; text-transform: uppercase; color: #ccc; font-family: var(--font-mono); }

/* Value Stream map specific */
.process-flow { display: flex; flex-direction: column; gap: 2rem; }
.process-step { border: var(--border-thick); padding: 2rem; position: relative; background: var(--bg-primary); }
.process-step::after { content: '↓'; position: absolute; bottom: -2.5rem; left: 50%; transform: translateX(-50%); font-size: 2rem; color: var(--bg-dark); }
.process-step:last-child::after { display: none; }
@media (min-width: 900px) {
    .process-flow { flex-direction: row; align-items: center; }
    .process-step { flex: 1; }
    .process-step::after { content: '→'; bottom: auto; right: -2rem; top: 50%; left: auto; transform: translateY(-50%); }
}

@media (max-width: 900px) {
    .main-nav { display: none; flex-direction: column; position: absolute; top: 100%; left: 0; width: 100%; background: var(--bg-primary); border-bottom: var(--border-thick); padding: 1rem 5%; }
    .main-nav.active { display: flex; }
    .menu-toggle { display: block; }
    section { padding: 4rem 0; }
    h1 { font-size: 2.5rem; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}