:root {
    --bg: #0a0b0d;
    --iron: #2c3e50;
    --gold: #ffcc00;
    --gold-dim: rgba(255, 204, 0, 0.1);
    --glass: rgba(255, 255, 255, 0.02);
    --border: rgba(255, 255, 255, 0.1);
    --text: #e0e6ed;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Outfit', 'Inter', sans-serif;
    min-height: 100vh;
    padding: 60px 40px;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 100px 100px;
}

.back-btn {
    position: fixed; top: 20px; left: 20px; padding: 8px 20px;
    background: var(--glass); border: 1px solid var(--border);
    border-radius: 4px; color: var(--gold);
    text-decoration: none; font-size: 0.75rem; letter-spacing: 2px;
    backdrop-filter: blur(15px); z-index: 1000; transition: 0.3s;
}
.back-btn:hover { background: var(--gold); color: #000; box-shadow: 0 0 20px var(--gold); }

.fortress-container {
    max-width: 1000px; margin: 0 auto;
}

/* HEADER */
header {
    text-align: center; margin-bottom: 60px;
}

header h1 {
    font-weight: 200; letter-spacing: 15px; font-size: 2.5rem;
    color: #fff; text-shadow: 0 0 30px var(--gold-dim);
}

header p {
    font-size: 0.7rem; color: #666; letter-spacing: 5px; margin-top: 10px;
}

/* MAIN LAYOUT */
.main-grid {
    display: grid; grid-template-columns: 350px 1fr; gap: 30px;
}

.panel {
    background: var(--glass); border: 1px solid var(--border);
    border-radius: 20px; padding: 35px; backdrop-filter: blur(30px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

.panel h2 {
    font-size: 0.75rem; letter-spacing: 3px; color: var(--gold);
    margin-bottom: 25px; text-transform: uppercase;
}

/* INPUT CONTROLS */
.input-group { margin-bottom: 25px; }
.input-group label { display: block; font-size: 0.65rem; color: #666; margin-bottom: 8px; letter-spacing: 1px; }
input {
    width: 100%; background: rgba(0,0,0,0.3); border: 1px solid var(--border);
    padding: 12px 15px; border-radius: 8px; color: #fff; font-size: 1rem;
    font-family: monospace; outline: none; transition: 0.3s;
}
input:focus { border-color: var(--gold); box-shadow: 0 0 15px var(--gold-dim); }

.action-btn {
    width: 100%; background: var(--gold); color: #000; border: none;
    padding: 15px; border-radius: 8px; font-weight: 700; cursor: pointer;
    font-size: 0.9rem; letter-spacing: 2px; transition: 0.3s;
}
.action-btn:hover { transform: scale(1.02); box-shadow: 0 0 30px var(--gold); }

/* VISUALIZER */
.visualizer {
    display: flex; flex-direction: column; gap: 20px;
}

.stat-row {
    display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
}

.stat-card {
    background: rgba(255,255,255,0.02); border-radius: 12px; padding: 20px;
    border-left: 3px solid var(--gold);
}

.stat-label { font-size: 0.6rem; color: #666; margin-bottom: 5px; text-transform: uppercase; }
.stat-value { font-size: 1.4rem; font-weight: 700; font-family: monospace; }

/* GROWTH CHART PLACEHOLDER */
.chart-area {
    flex-grow: 1; background: rgba(0,0,0,0.2); border-radius: 12px;
    border: 1px dashed var(--border); position: relative; overflow: hidden;
    height: 300px; display: flex; align-items: center; justify-content: center;
}

.chart-line {
    position: absolute; bottom: 0; left: 0; width: 100%;
    height: 100%; background: linear-gradient(transparent, var(--gold-dim));
    clip-path: polygon(0% 100%, 0% 80%, 20% 70%, 40% 75%, 60% 40%, 80% 50%, 100% 20%, 100% 100%);
    transition: 1s ease-in-out;
}

@media (max-width: 900px) {
    body { padding: 40px 20px; }
    header h1 { font-size: 1.6rem; letter-spacing: 5px; }
    .main-grid { grid-template-columns: 1fr; }
    .stat-row { grid-template-columns: 1fr; }
    .chart-area { height: 200px; }
}