:root {
    --bg: #ffffff;
    --sidebar-bg: #f7f7f7;
    --text-main: #1d1d1f;
    --text-sec: #86868b;
    --accent: #0071e3;
    --border: #d2d2d7;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', sans-serif; }
body { background: var(--bg); color: var(--text-main); height: 100vh; overflow: hidden; }
.app-container { display: flex; height: 100vh; }

/* SIDEBAR */
.sidebar { width: 260px; background: var(--sidebar-bg); border-right: 1px solid var(--border); padding: 40px 20px; }
.logo { font-size: 1.2rem; font-weight: 700; margin-bottom: 40px; letter-spacing: -1px; padding-left: 15px; }
.logo span { color: var(--accent); }
.nav-item { display: block; width: 100%; text-align: left; background: none; border: none; color: var(--text-sec); padding: 12px 15px; cursor: pointer; font-size: 0.9rem; font-weight: 500; border-radius: 8px; margin-bottom: 5px; transition: 0.2s; }
.nav-item:hover { background: #eeeeee; color: var(--text-main); }
.nav-item.active { background: #e8e8ed; color: var(--accent); }

/* VIEWPORT */
.viewport { flex: 1; padding: 60px 80px; overflow-y: auto; }
.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.4s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.header { margin-bottom: 40px; }
.header h1 { font-size: 2.2rem; font-weight: 700; letter-spacing: -0.8px; margin-bottom: 5px; }
.header p { color: var(--text-sec); }

/* OPTI GRID */
.opti-section { margin-bottom: 30px; }
.opti-section h3 { font-size: 0.85rem; color: var(--text-sec); text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 15px; padding-bottom: 5px; border-bottom: 1px solid var(--border); }
.opti-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 15px; }
.opti-box { border: 1px solid var(--border); padding: 20px; border-radius: 12px; cursor: pointer; transition: 0.3s; background: #fff; }
.opti-box:hover { border-color: var(--accent); box-shadow: 0 4px 15px rgba(0,0,0,0.05); transform: translateY(-2px); }
.opti-box h3 { font-size: 0.95rem; margin-bottom: 8px; }
.opti-box p { font-size: 0.75rem; color: var(--text-sec); margin-bottom: 12px; line-height: 1.4; }
.opti-box span { font-size: 0.7rem; font-weight: 700; color: var(--accent); background: #f0f7ff; padding: 4px 8px; border-radius: 4px; }
.download-link { color: #34c759 !important; background: #f0fff4 !important; }

/* BROWSER GRID */
.browser-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 15px; }

/* HARDWARE FORGE - ACTUALIZADO */
.forge-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.forge-card { border: 1px solid var(--border); border-radius: 12px; background: #fff; padding: 30px; display: flex; flex-direction: column; }

.forge-buttons-large { display: flex; gap: 12px; margin-top: 25px; }
.f-btn-large { flex: 1; text-align: center; padding: 16px; border-radius: 10px; text-decoration: none; font-weight: 700; font-size: 0.9rem; transition: 0.3s; }
.nv { background: #76b900; color: #fff; }
.amd { background: #ed1c24; color: #fff; }
.msi { border: 1px solid var(--text-main); color: var(--text-main); margin-top: auto; text-align: center; padding: 12px; text-decoration: none; font-weight: 600; border-radius: 8px; }
.f-btn-large:hover, .msi:hover { opacity: 0.85; transform: translateY(-2px); box-shadow: 0 5px 15px rgba(0,0,0,0.1); }

/* SYSTEM CHECK - ACTUALIZADO */
.hardware-card { border: 1px solid var(--border); padding: 50px; border-radius: 16px; text-align: center; background: #fff; }
.hw-info-text { color: var(--text-sec); margin-bottom: 30px; line-height: 1.6; max-width: 600px; margin-inline: auto; font-size: 0.95rem; }
.download-btn { background: var(--accent); color: #fff; border: none; padding: 18px 40px; border-radius: 40px; font-weight: 700; font-size: 1rem; cursor: pointer; transition: 0.3s; margin-bottom: 30px; }
.download-btn:hover { transform: scale(1.03); box-shadow: 0 10px 30px rgba(0,113,227,0.3); }

.security-badge-v2 { display: flex; align-items: center; justify-content: center; gap: 15px; padding: 20px; background: #fbfbfb; border: 1px dashed var(--border); border-radius: 12px; max-width: 500px; margin: 0 auto; }
.badge-icon { color: #34c759; font-size: 1.2rem; font-weight: bold; }
.badge-text { text-align: left; }
.badge-text strong { color: #1d1d1f; font-size: 0.75rem; display: block; margin-bottom: 2px; }
.badge-text p { color: var(--text-sec); font-size: 0.7rem; }

/* IA WINDOW */
.ia-window { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: #fff; }
.ia-log { height: 120px; padding: 20px; font-size: 0.9rem; color: var(--text-sec); background: #fafafa; }
.ia-input-group { display: flex; padding: 10px; border-top: 1px solid var(--border); }
.ia-input-group input { flex: 1; border: none; padding: 10px; outline: none; }
.ia-input-group button { background: var(--text-main); color: #fff; border: none; padding: 10px 20px; border-radius: 6px; cursor: pointer; }

/* LINKS & CARDS */
.b-link, .sec-card { display: block; padding: 20px; border: 1px solid var(--border); border-radius: 12px; text-decoration: none; color: var(--text-main); font-weight: 600; margin-bottom: 10px; cursor: pointer; text-align: center; transition: 0.2s; }
.b-link:hover, .sec-card:hover { border-color: var(--accent); color: var(--accent); background: #f9f9fb; }