:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #161f30;
    --bg-card: #1e293b;
    --bg-hover: #2d3b55;
    --border-color: #334155;
    --text-primary: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --accent-red: #ef4444;
    --accent-green: #22c55e;
    --accent-yellow: #eab308;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
body { background: var(--bg-primary); color: var(--text-primary); min-height: 100vh; display: flex; flex-direction: column; overflow-x: hidden; }

/* Navbar */
.navbar { background: var(--bg-secondary); border-bottom: 1px solid var(--border-color); padding: 0.65rem 1rem; display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 50; }
.nav-brand { display: flex; align-items: center; gap: 0.65rem; }
.logo-icon { width: 34px; height: 34px; background: linear-gradient(135deg, var(--accent), #818cf8); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; font-size: 1.1rem; color: #fff; }
.nav-brand h1 { font-size: 1rem; font-weight: 700; }
.sub-title { font-size: 0.7rem; color: var(--text-muted); }
.stat-pill { background: rgba(34, 197, 94, 0.15); color: #4ade80; border: 1px solid rgba(34, 197, 94, 0.3); padding: 0.25rem 0.6rem; border-radius: 99px; font-size: 0.75rem; font-weight: 600; }

/* Main */
.main-container { padding: 0.75rem; flex: 1; display: flex; flex-direction: column; max-width: 1100px; margin: 0 auto; width: 100%; }
.device-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.device-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 1rem; display: flex; flex-direction: column; gap: 0.75rem; }
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--text-muted); font-size: 0.9rem; display: flex; flex-direction: column; align-items: center; gap: 0.75rem; grid-column: 1 / -1; }
.empty-state i { font-size: 2.5rem; color: var(--accent); }

/* Buttons & Inputs */
.btn { padding: 0.55rem 0.85rem; border-radius: var(--radius-md); font-size: 0.82rem; font-weight: 600; cursor: pointer; border: none; display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem; transition: all 0.15s; }
.btn-primary { background: linear-gradient(135deg, var(--accent), #0284c7); color: #fff; }
.btn-secondary { background: var(--bg-secondary); border: 1px solid var(--border-color); color: var(--text-primary); }
.btn-danger { background: linear-gradient(135deg, #ef4444, #b91c1c); color: #fff; }
.btn-danger:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-block { width: 100%; padding: 0.75rem; }
.btn-sm { padding: 0.35rem 0.65rem; font-size: 0.75rem; }

input[type=text] { background: #060911; border: 1px solid var(--border-color); border-radius: var(--radius-md); color: #fff; padding: 0.55rem 0.75rem; font-size: 0.85rem; outline: none; }
input[type=text]:focus { border-color: var(--accent); }

/* Studio & Tabs */
.studio-top-bar { display: flex; justify-content: space-between; align-items: center; background: var(--bg-secondary); padding: 0.65rem 1rem; border-radius: var(--radius-lg) var(--radius-lg) 0 0; border: 1px solid var(--border-color); border-bottom: none; }
.studio-tabs { display: flex; background: #060911; border: 1px solid var(--border-color); overflow-x: auto; }
.tab-btn { flex: 1; padding: 0.65rem 0.5rem; background: transparent; border: none; color: var(--text-muted); font-size: 0.8rem; font-weight: 600; cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 0.35rem; border-bottom: 2px solid transparent; white-space: nowrap; }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); background: rgba(56, 189, 248, 0.05); }

.tab-content { display: none; background: var(--bg-secondary); border: 1px solid var(--border-color); border-top: none; border-radius: 0 0 var(--radius-lg) var(--radius-lg); padding: 1rem; }
.tab-content.active { display: block; }

/* Screen Canvas */
.screen-box { display: flex; justify-content: center; align-items: center; background: #000; border: 4px solid #1e293b; border-radius: 24px; max-height: 55vh; overflow: hidden; margin-bottom: 0.75rem; }
#screen-canvas { width: 100%; max-height: 54vh; object-fit: contain; display: block; cursor: crosshair; }

.input-bar { display: flex; gap: 0.45rem; margin-bottom: 0.75rem; }
.input-bar input { flex: 1; }

.quick-tools-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.45rem; margin-bottom: 0.75rem; }
.btn-tool { background: var(--bg-card); border: 1px solid var(--border-color); color: var(--text-primary); padding: 0.5rem; border-radius: var(--radius-md); font-size: 0.75rem; cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 0.35rem; }
.btn-tool:hover { background: var(--bg-hover); border-color: var(--accent); }

.virtual-nav-bar { display: flex; justify-content: space-around; background: #060911; border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 0.4rem; }
.nav-btn { background: transparent; border: none; color: var(--text-muted); font-size: 0.85rem; font-weight: 600; padding: 0.4rem 1rem; cursor: pointer; border-radius: var(--radius-sm); }
.nav-btn:hover { color: #fff; background: rgba(255, 255, 255, 0.08); }

/* SMS Tab */
.sms-header-actions { margin-bottom: 1rem; }
.sms-send-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 0.85rem; margin-bottom: 1rem; }
.sms-list { display: flex; flex-direction: column; gap: 0.5rem; max-height: 350px; overflow-y: auto; }
.sms-item { background: #060911; border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 0.75rem; display: flex; flex-direction: column; gap: 0.25rem; font-size: 0.8rem; }
.sms-meta { display: flex; justify-content: space-between; color: var(--accent); font-weight: 600; }

/* Notifications Feed */
.notifs-feed { display: flex; flex-direction: column; gap: 0.5rem; max-height: 400px; overflow-y: auto; }
.notif-item { background: #060911; border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 0.75rem; display: flex; flex-direction: column; gap: 0.25rem; font-size: 0.8rem; border-left: 3px solid var(--accent); }
.notif-pkg { color: var(--accent); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; }

/* File Manager */
.files-list { display: flex; flex-direction: column; gap: 0.35rem; max-height: 350px; overflow-y: auto; font-size: 0.82rem; }
.file-row { display: flex; justify-content: space-between; align-items: center; background: #060911; border: 1px solid var(--border-color); border-radius: var(--radius-sm); padding: 0.5rem 0.75rem; cursor: pointer; }
.file-row:hover { border-color: var(--accent); }

/* Location Card */
.location-card { text-align: center; padding: 2rem 1rem; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); }