/**
 * DevilAndroid Mobile Design System
 * Premium Gaming-Inspired Mobile Interface Tokens & Foundations
 * High performance, zero lag, GPU-accelerated, touch-first
 */

:root {
    /* Color System - Premium Tactical Gaming Palette */
    --da-bg: #070b13;
    --da-bg-gradient: radial-gradient(circle at 50% 0%, rgba(59, 130, 246, 0.12) 0%, transparent 65%),
                      radial-gradient(circle at 100% 100%, rgba(6, 182, 212, 0.08) 0%, transparent 60%),
                      radial-gradient(circle at 0% 50%, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
    --da-surface: #0e1526;
    --da-surface-elevated: #151f38;
    --da-surface-input: #090e1a;
    --da-surface-glass: rgba(14, 21, 38, 0.85);

    /* Borders */
    --da-border: rgba(255, 255, 255, 0.08);
    --da-border-strong: rgba(255, 255, 255, 0.16);
    --da-border-accent: rgba(59, 130, 246, 0.45);
    --da-border-cyan: rgba(6, 182, 212, 0.45);

    /* Text */
    --da-text: #f3f4f6;
    --da-text-secondary: #94a3b8;
    --da-text-muted: #64748b;

    /* Accents & Status */
    --da-accent: #3b82f6;
    --da-accent-hover: #2563eb;
    --da-accent-active: #1d4ed8;
    --da-accent-cyan: #06b6d4;
    --da-accent-violet: #8b5cf6;
    --da-accent-surface: rgba(59, 130, 246, 0.12);
    --da-accent-glow: rgba(59, 130, 246, 0.35);

    --da-success: #10b981;
    --da-success-surface: rgba(16, 185, 129, 0.12);
    --da-success-glow: rgba(16, 185, 129, 0.3);

    --da-warning: #f59e0b;
    --da-warning-surface: rgba(245, 158, 11, 0.12);
    --da-warning-glow: rgba(245, 158, 11, 0.3);

    --da-danger: #ef4444;
    --da-danger-surface: rgba(239, 68, 68, 0.12);
    --da-danger-glow: rgba(239, 68, 68, 0.3);

    --da-info: #06b6d4;
    --da-info-surface: rgba(6, 182, 212, 0.12);

    /* Dimensions & Radii */
    --da-radius-xs: 4px;
    --da-radius-sm: 8px;
    --da-radius-md: 12px;
    --da-radius-lg: 16px;
    --da-radius-xl: 22px;
    --da-radius-full: 9999px;

    --da-header-height: 56px;
    --da-bottom-nav-height: 66px;
    --da-touch-min: 44px;

    /* Mobile Safe Area Insets */
    --da-safe-top: env(safe-area-inset-top, 0px);
    --da-safe-bottom: env(safe-area-inset-bottom, 0px);
    --da-safe-left: env(safe-area-inset-left, 0px);
    --da-safe-right: env(safe-area-inset-right, 0px);

    /* Glass Surfaces */
    --da-glass-blur: blur(20px);
    --da-glass-border: rgba(255, 255, 255, 0.1);

    /* Shadows & Glows */
    --da-shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.4);
    --da-shadow-md: 0 6px 20px rgba(0, 0, 0, 0.55);
    --da-shadow-lg: 0 14px 36px rgba(0, 0, 0, 0.7);
    --da-shadow-glow: 0 0 20px rgba(59, 130, 246, 0.35);
    --da-shadow-cyan-glow: 0 0 20px rgba(6, 182, 212, 0.3);

    /* Motion */
    --da-transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
    --da-transition: 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Reset & Mobile Performance Foundations */
*, *::before, *::after {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 14px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    overscroll-behavior-y: none;
    background-color: var(--da-bg);
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--da-text);
    background-color: var(--da-bg);
    background-image: var(--da-bg-gradient);
    background-attachment: fixed;
    background-repeat: no-repeat;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Mobile Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-weight: 700;
    line-height: 1.25;
    color: var(--da-text);
    letter-spacing: -0.02em;
}

h1 { font-size: 1.55rem; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.1rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.9rem; }

p {
    margin-top: 0;
    margin-bottom: 0.75rem;
    color: var(--da-text-secondary);
}

small, .small {
    font-size: 0.85em;
}

a {
    color: var(--da-accent);
    text-decoration: none;
    transition: color var(--da-transition-fast);
}

a:hover {
    color: #60a5fa;
    text-decoration: none;
}

code, kbd, samp, pre {
    font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
    font-size: 0.88em;
}

code {
    background-color: rgba(59, 130, 246, 0.08);
    color: #93c5fd;
    padding: 0.15em 0.45em;
    border-radius: var(--da-radius-sm);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

/* Minimal Touch Scrollbar */
::-webkit-scrollbar {
    width: 4px;
    height: 4px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.12);
    border-radius: 99px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.22);
}

/* Color & Surface Utility Classes */
.text-da-primary { color: var(--da-text) !important; }
.text-da-secondary { color: var(--da-text-secondary) !important; }
.text-da-muted { color: var(--da-text-muted) !important; }
.text-da-accent { color: var(--da-accent) !important; }
.text-da-cyan { color: var(--da-accent-cyan) !important; }
.text-da-success { color: var(--da-success) !important; }
.text-da-warning { color: var(--da-warning) !important; }
.text-da-danger { color: var(--da-danger) !important; }

.bg-da-surface { background-color: var(--da-surface) !important; }
.bg-da-elevated { background-color: var(--da-surface-elevated) !important; }
.border-da { border-color: var(--da-border) !important; }

/* Tactical Status Dots */
.da-status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    font-weight: 500;
}

.da-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    position: relative;
    display: inline-block;
}

.da-status-dot.online {
    background-color: var(--da-success);
    box-shadow: 0 0 8px var(--da-success);
}

.da-status-dot.online::after {
    content: "";
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    background-color: rgba(16, 185, 129, 0.4);
    animation: daPulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.da-status-dot.warning {
    background-color: var(--da-warning);
    box-shadow: 0 0 8px var(--da-warning);
}

.da-status-dot.offline {
    background-color: var(--da-danger);
    box-shadow: 0 0 8px var(--da-danger);
}

@keyframes daPulse {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.6); opacity: 0; }
}

/* Touch Active Feedback */
.da-touch-active:active, 
.btn:active, 
.da-bottom-nav-item:active,
.da-card-interactive:active,
.da-chip:active {
    transform: scale(0.96);
    transition: transform 0.08s ease;
}

/* Hardware Compositing Layer Optimizations */
.da-bottom-nav,
.da-header,
.da-bottom-nav-fab,
.da-mobile-drawer,
.da-toast {
    will-change: transform, opacity;
}