:root { --bg: #111827; --panel: #1f2937; --text: #f9fafb; --accent: #10b981; --border: #374151; }
body { margin: 0; padding: 20px; font-family: 'Segoe UI', system-ui, sans-serif; background: var(--bg); color: var(--text); }
.container { max-width: 1200px; margin: 0 auto; }
header { text-align: center; margin-bottom: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; margin-bottom: 40px; }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; display: flex; flex-direction: column; }
.panel-head { background: #111827; padding: 12px 15px; font-weight: bold; border-bottom: 1px solid var(--border); color: var(--accent); }
textarea { flex-grow: 1; height: 350px; background: transparent; color: #fff; border: none; padding: 15px; font-family: monospace; font-size: 14px; resize: none; outline: none; }
textarea:focus { background: rgba(0,0,0,0.2); }

.tool-matrix { margin-top: 40px; padding-top: 30px; border-top: 1px solid var(--border); text-align: center; }
.matrix-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 10px; margin-top: 20px; }
.matrix-grid a { background: var(--panel); color: var(--text); padding: 10px; border-radius: 6px; text-decoration: none; border: 1px solid var(--border); transition: 0.2s; font-size: 0.9rem; }
.matrix-grid a:hover { background: var(--border); border-color: var(--accent); }
.donate-text { color: #9ca3af; font-size: 0.9rem; }
.support-text a { color: var(--accent); text-decoration: none; font-weight: bold; }