body {
    background: linear-gradient(135deg, #050505 0%, #0a1a0a 100%);
    color: #00ff00; /* Hacker Yeşili */
    font-family: 'Courier New', Courier, monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    overflow: hidden;
    position: relative;
}

/* Arka plana hareketli, nefes alan radyal ışık efekti */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(0, 255, 0, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(0, 255, 255, 0.08) 0%, transparent 50%);
    animation: gradientPulse 5s ease-in-out infinite;
    pointer-events: none;
    z-index: -1;
}

@keyframes gradientPulse {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

/* Panele cam efekti (glassmorphism) ve hafif yüzme animasyonu */
.panel {
    background: rgba(10, 15, 10, 0.85);
    border: 1px solid rgba(0, 255, 0, 0.5);
    padding: 40px;
    border-radius: 15px;
    width: 500px;
    text-align: center;
    box-shadow: 
        0 0 20px rgba(0, 255, 0, 0.15),
        inset 0 0 30px rgba(0, 255, 0, 0.05);
    backdrop-filter: blur(10px);
    animation: panelFloat 6s ease-in-out infinite;
}

@keyframes panelFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

/* Input ve Select alanlarına modern odaklanma (focus) efektleri */
input, select {
    background-color: rgba(0, 0, 0, 0.6);
    color: #00ff00;
    border: 1px solid rgba(0, 255, 0, 0.4);
    padding: 12px;
    width: 80%;
    margin-bottom: 15px;
    font-family: inherit;
    border-radius: 5px;
    transition: all 0.3s ease;
    outline: none;
}

input:focus, select:focus {
    border-color: #00ff00;
    box-shadow: 0 0 15px rgba(0, 255, 0, 0.4);
    background-color: rgba(0, 20, 0, 0.8);
}

/* Butonlara gradyan, hover'da kalkma ve gölge efekti */
button {
    background: linear-gradient(135deg, #00cc00 0%, #00ff00 100%);
    color: #000;
    border: none;
    padding: 12px 25px;
    font-weight: bold;
    cursor: pointer;
    font-family: inherit;
    margin: 8px;
    border-radius: 5px;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 255, 0, 0.3);
}

button:hover {
    background: linear-gradient(135deg, #00ff00 0%, #66ff66 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 255, 0, 0.5);
}

button:active {
    transform: translateY(1px);
    box-shadow: 0 2px 10px rgba(0, 255, 0, 0.3);
}

/* Ana Menü butonu - panel dışında üstte sabit durur */
.ana-menu-bar {
    position: absolute;
    top: 18px;
    left: 18px;
    z-index: 10;
}

.ana-menu-btn {
    display: inline-block;
    padding: 10px 20px;
    border: 1px solid rgba(0, 255, 0, 0.5);
    border-radius: 8px;
    color: #00ff00;
    background: rgba(10, 15, 10, 0.85);
    text-decoration: none;
    font-size: 13px;
    font-weight: bold;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.ana-menu-btn:hover {
    color: #000;
    background: #00ff00;
    box-shadow: 0 0 18px rgba(0, 255, 0, 0.6);
}

/* Link geçişleri */
nav a { 
    color: #00ff00; 
    text-decoration: none; 
    font-weight: bold; 
    margin: 0 10px; 
    transition: all 0.3s ease;
}

nav a:hover { 
    color: #fff; 
    text-shadow: 0 0 10px #00ff00;
}

.uyari-mesaji { 
    color: #ff3333; 
    font-weight: bold; 
    text-shadow: 0 0 5px rgba(255, 0, 0, 0.5);
}

/* Durum kutularına genel geçiş ve köşe yuvarlama */
.durum-kutusu {
    padding: 20px;
    margin: 20px 0;
    font-size: 20px;
    font-weight: bold;
    border: 2px dashed;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.kirmizi { 
    border-color: #ff3333; 
    color: #ff3333; 
    box-shadow: 0 0 15px rgba(255, 0, 0, 0.2);
}

.mavi { 
    border-color: #00ffff; 
    color: #00ffff; 
    text-shadow: 0 0 10px #00ffff; 
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.2);
}

/* SALDIRI DURUMU: Titreme ve Alarm Flaşörü Animasyonu */
.siyah-yanip-sonen {
    background: linear-gradient(135deg, #ff0000 0%, #990000 100%);
    color: #000;
    border-color: #ff3333;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 2px;
    animation: alarmBlink 0.8s infinite, shake 0.5s infinite;
    box-shadow: 0 0 30px rgba(255, 0, 0, 0.6);
}

@keyframes alarmBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-3px); }
    75% { transform: translateX(3px); }
}