/* ==========================================================================
   PhotonOS - Main Design System & Base Variables
   ========================================================================== */

:root {
    /* Color Palette - Cyber Neon Dark Mode */
    --bg-dark: #0b0d19;
    --bg-surface: rgba(18, 22, 40, 0.75);
    --bg-surface-solid: #121628;
    --bg-glass: rgba(22, 28, 52, 0.65);
    --bg-glass-hover: rgba(35, 45, 80, 0.75);
    --bg-active: rgba(45, 60, 110, 0.85);

    --border-color: rgba(255, 255, 255, 0.12);
    --border-glow: rgba(0, 229, 255, 0.4);

    --accent-primary: #00e5ff;
    --accent-primary-hover: #33ebff;
    --accent-secondary: #ff007f;
    --accent-tertiary: #a855f7;
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-glow: 0 0 10px rgba(0, 229, 255, 0.5);

    /* UI Dimensions & Spacing */
    --taskbar-height: 48px;
    --window-border-radius: 12px;
    --glass-backdrop-blur: blur(16px);
    --shadow-window: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 229, 255, 0.15);
    --shadow-dropdown: 0 10px 30px rgba(0, 0, 0, 0.5);

    /* Fonts */
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Fira Code', monospace;
    --font-retro: 'VT323', monospace;

    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Theme Options */
body.theme-cyberpunk {
    --bg-dark: #0a0b16;
    --accent-primary: #00f0ff;
    --accent-secondary: #ff0055;
}

body.theme-synthwave {
    --bg-dark: #1a0b2e;
    --accent-primary: #ff71ce;
    --accent-secondary: #01cdfe;
}

body.theme-matrix {
    --bg-dark: #051409;
    --accent-primary: #00ff66;
    --accent-secondary: #008833;
}

/* CSS Reset & Base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-user-select: none;
}

html, body {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background-color: var(--bg-dark);
    font-family: var(--font-sans);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* General Input / Button overrides */
input, textarea, button, select {
    font-family: inherit;
    font-size: 14px;
    outline: none;
}

button {
    cursor: pointer;
    border: none;
    background: transparent;
}

/* Toast Notifications */
#toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 999999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast {
    pointer-events: auto;
    min-width: 280px;
    max-width: 380px;
    padding: 14px 18px;
    background: var(--bg-surface-solid);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--accent-primary);
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    backdrop-filter: var(--glass-backdrop-blur);
    color: var(--text-primary);
    display: flex;
    align-items: flex-start;
    gap: 12px;
    animation: toastIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast.toast-warning { border-left-color: var(--accent-warning); }
.toast.toast-danger { border-left-color: var(--accent-danger); }
.toast.toast-success { border-left-color: var(--accent-success); }
.toast.toast-glitch { border-left-color: var(--accent-secondary); animation: glitchToast 0.2s infinite; }

.toast-icon {
    font-size: 20px;
    line-height: 1;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 2px;
}

.toast-message {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.toast-close {
    color: var(--text-muted);
    font-size: 16px;
    background: none;
    border: none;
    cursor: pointer;
}

.toast-close:hover {
    color: var(--text-primary);
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

/* Glass Utility Classes */
.glass-panel {
    background: var(--bg-glass);
    backdrop-filter: var(--glass-backdrop-blur);
    border: 1px solid var(--border-color);
    border-radius: var(--window-border-radius);
}

.hidden {
    display: none !important;
}