/* ============== Base Styles ============== */
/* Reset básico */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --accent-blue: #2196F3;
    --accent-blue-hover: #1976D2;
    --accent-blue-light: #42a5f5;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --border-color: #30363d;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    width: 95%;
    max-width: 500px;
    background: var(--bg-secondary);
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
}

/* Header */
header {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 20px;
    text-align: center;
    flex-shrink: 0;
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    font-size: 1.5rem;
    margin-bottom: 5px;
    color: var(--accent-blue-light);
}

header p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Footer */
footer {
    padding: 10px;
    text-align: center;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

/* ============== Login Styles ============== */
.login-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
    background: var(--bg-primary);
}

.login-container h2 {
    color: var(--text-primary);
    margin-bottom: 30px;
    font-size: 1.8rem;
}

.login-form {
    width: 100%;
    max-width: 350px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.login-form input {
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.login-form input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.2);
}

.login-form input::placeholder {
    color: var(--text-secondary);
}

.login-form button {
    padding: 14px 20px;
    background: var(--accent-blue);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
    margin-top: 10px;
}

.login-form button:hover {
    background: var(--accent-blue-hover);
    transform: scale(1.02);
}

.error-message {
    color: #f44336;
    font-size: 0.9rem;
    text-align: center;
    padding: 10px;
    background: rgba(244, 67, 54, 0.1);
    border-radius: 6px;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .container {
        width: 100%;
        border-radius: 12px;
    }
    
    header {
        padding: 15px;
    }
    
    header h1 {
        font-size: 1.3rem;
    }
    
    .login-container {
        padding: 30px 15px;
    }
    
    .login-form input,
    .login-form button {
        padding: 12px 14px;
    }
}