:root {
    --dark-bg: #121212;
    --dark-card: #1E1E1E;
    --accent-color: #4CAF50;
    --text-color: #E0E0E0;
    --pixel-border: 4px;
}
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
body {
    font-family: 'Courier New', monospace;
    background-color: var(--dark-bg);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 15px;
}
#login-container, .container {
    width: 100%;
    max-width: 500px;
    background-color: var(--dark-card);
    border-radius: var(--pixel-border);
    padding: 30px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.3);
    text-align: center;
}
input, button {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 2px solid var(--accent-color);
    background-color: var(--dark-bg);
    color: var(--text-color);
    border-radius: var(--pixel-border);
}
button {
    cursor: pointer;
    transition: background-color 0.3s;
}
button:hover {
    background-color: var(--accent-color);
    color: var(--dark-bg);
}
#message, .timer {
    color: #FF6B6B;
    margin-top: 10px;
}
.popup {
    background: #222;
    padding: 15px;
    border: 1px solid var(--accent-color);
    margin-bottom: 20px;
    border-radius: var(--pixel-border);
}
.profile-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.download-cv {
    background-color: var(--accent-color);
    color: var(--dark-bg);
    text-decoration: none;
    padding: 8px 15px;
    border-radius: var(--pixel-border);
}
.led-timer {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--dark-bg);
    padding: 10px;
    border-radius: var(--pixel-border);
    margin-bottom: 20px;
}
.led {
    width: 15px;
    height: 15px;
    background-color: #FF6B6B;
    border-radius: 50%;
    margin-right: 10px;
    animation: pulse 1s infinite alternate;
}
@keyframes pulse {
    from { opacity: 0.5; }
    to { opacity: 1; }
}
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 20px;
}
.skill-item {
    background-color: var(--dark-bg);
    border: 2px solid var(--accent-color);
    border-radius: var(--pixel-border);
    padding: 10px;
    text-align: center;
    font-size: 0.9em;
}
@media (max-width: 600px) {
    #login-container, .container { max-width: 100%; padding: 15px; }
    .skills-grid { grid-template-columns: repeat(2, 1fr); }
}