/* ========================================
   SPLINTER CELL NIGHT VISION THEME
   Color Scheme & CSS Variables
   ======================================== */

:root {
    /* Night Vision Green Palette */
    --nv-black: #0a0e0a;           /* Deep black background */
    --nv-dark-green: #0d1f0d;      /* Panel backgrounds */
    --nv-darker-green: #081408;    /* Deeper accents */
    --nv-green: #00ff41;           /* Primary bright NV green */
    --nv-green-dim: #00cc33;       /* Secondary/dimmed text */
    --nv-green-darker: #009926;    /* Tertiary/disabled */
    --nv-green-glow: rgba(0, 255, 65, 0.5);  /* Glow effect */
    --nv-green-glow-strong: rgba(0, 255, 65, 0.8);

    /* Alert Colors */
    --nv-red: #ff0033;             /* Errors/alerts */
    --nv-red-glow: rgba(255, 0, 51, 0.5);
    --nv-amber: #ffaa00;           /* Warnings */
    --nv-blue: #00ccff;            /* Info/links */

    /* Borders & Dividers */
    --border-color: var(--nv-green-darker);
    --border-glow: 0 0 4px var(--nv-green-glow);

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Typography */
    --font-mono: 'Courier New', 'Consolas', 'Monaco', monospace;
    --font-size-xs: 10px;
    --font-size-sm: 12px;
    --font-size-base: 14px;
    --font-size-lg: 16px;
    --font-size-xl: 20px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
}

/* ========================================
   BASE STYLES
   ======================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-mono);
    font-size: var(--font-size-base);
    background-color: var(--nv-black);
    color: var(--nv-green);
    line-height: 1.6;
    overflow: hidden;
    position: relative;
}

/* Prevent text selection highlighting (optional - makes it feel more terminal-like) */
::selection {
    background-color: var(--nv-green-glow);
    color: var(--nv-black);
}

/* ========================================
   SCREEN OVERLAYS
   ======================================== */

/* Vignette effect (NV goggle edges) */
.vignette {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9998;
    background: radial-gradient(
        ellipse at center,
        transparent 0%,
        transparent 60%,
        rgba(0, 0, 0, 0.3) 80%,
        rgba(0, 0, 0, 0.6) 100%
    );
}

/* Scan line animation */
.scan-line {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(
        to bottom,
        transparent,
        var(--nv-green-glow),
        transparent
    );
    pointer-events: none;
    z-index: 9999;
    animation: scan 8s linear infinite;
    opacity: 0.3;
}

@keyframes scan {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(100vh);
    }
}

/* ========================================
   SCREEN MANAGEMENT
   ======================================== */

.screen {
    display: none;
    width: 100vw;
    height: 100vh;
    opacity: 0;
    animation: flicker-in 0.5s ease forwards;
}

.screen.active {
    display: flex;
}

/* Flicker effect on screen load */
@keyframes flicker-in {
    0% {
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    20% {
        opacity: 0.8;
    }
    30% {
        opacity: 1;
    }
    40% {
        opacity: 0.9;
    }
    100% {
        opacity: 1;
    }
}

/* ========================================
   BUTTONS
   ======================================== */

button {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    border: none;
    background: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--nv-dark-green);
    color: var(--nv-green);
    border: 1px solid var(--nv-green-darker);
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        var(--nv-green-glow),
        transparent
    );
    transition: left var(--transition-normal);
}

.btn-primary:hover {
    border-color: var(--nv-green);
    box-shadow: var(--border-glow);
    text-shadow: 0 0 4px var(--nv-green-glow);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-secondary {
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: transparent;
    color: var(--nv-green-dim);
    border: 1px solid var(--border-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-secondary:hover {
    color: var(--nv-green);
    border-color: var(--nv-green-dim);
    text-shadow: 0 0 4px var(--nv-green-glow);
}

.btn-icon {
    padding: var(--spacing-xs);
    color: var(--nv-green-dim);
    font-size: var(--font-size-lg);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    color: var(--nv-green);
    text-shadow: 0 0 6px var(--nv-green-glow);
    transform: scale(1.1);
}

/* ========================================
   FORMS
   ======================================== */

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--nv-green-dim);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-group input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--nv-darker-green);
    border: 1px solid var(--border-color);
    color: var(--nv-green);
    font-family: var(--font-mono);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
}

.form-group input::placeholder {
    color: var(--nv-green-darker);
}

.form-group input:focus {
    outline: none;
    border-color: var(--nv-green-dim);
    box-shadow: 0 0 8px var(--nv-green-glow);
    background-color: var(--nv-dark-green);
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

.hidden {
    display: none !important;
}

.glow {
    text-shadow: 0 0 8px var(--nv-green-glow-strong);
}

.error-message {
    padding: var(--spacing-sm);
    background-color: rgba(255, 0, 51, 0.1);
    border: 1px solid var(--nv-red);
    color: var(--nv-red);
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
    text-shadow: 0 0 4px var(--nv-red-glow);
}

.success-message {
    padding: var(--spacing-sm);
    background-color: rgba(0, 255, 65, 0.1);
    border: 1px solid var(--nv-green);
    color: var(--nv-green);
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

/* ========================================
   MODAL
   ======================================== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
}

.modal-content {
    background-color: var(--nv-dark-green);
    border: 2px solid var(--nv-green-dim);
    box-shadow: 0 0 20px var(--nv-green-glow);
    padding: var(--spacing-lg);
    min-width: 400px;
    max-width: 90%;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    color: var(--nv-green);
    font-size: var(--font-size-lg);
    letter-spacing: 1px;
}

.modal-close {
    font-size: 24px;
    color: var(--nv-green-dim);
    cursor: pointer;
    background: none;
    border: none;
}

.modal-close:hover {
    color: var(--nv-red);
    text-shadow: 0 0 8px var(--nv-red-glow);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    margin-top: var(--spacing-lg);
}

/* ========================================
   SCROLLBARS
   ======================================== */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background-color: var(--nv-darker-green);
}

::-webkit-scrollbar-thumb {
    background-color: var(--nv-green-darker);
    border: 1px solid var(--border-color);
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--nv-green-dim);
    box-shadow: 0 0 4px var(--nv-green-glow);
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--nv-green-darker) var(--nv-darker-green);
}